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Siemens 139-2021.9, Operating Instructions Manual

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139-2021.9 / 07 

NXAIR M 

133 

Earthing and de-earthing the busbar system 

 

17  Earthing and de-earthing the busbar system 

 

 HINT 

Read and understand these instructions before attempting operating works. 

 

17.1  Earthing the busbar system manually 

 

Arrangement of control elements 

The  operating  mechanism  of  the  earthing  switch  provided  for  earthing  the  busbar  system  is  located  in  the 
front upper area of the low-voltage compartment. 
 

 

 

Fig. 222:  Control elements of earthing switch for busbar system 

 
 

 WARNING 

Risk of falling 

Falling from a ladder can lead to injuries and bone fractures. 

Observe the guidelines for the use of working materials. 

Use approved electrician's ladders only. 

Observe the manual and the instructions on the ladder: 

 

NOTICE 

Maloperation 

A  switching  operation  once  started  must  be  completed  totally!  A  switching 
operation that was not completed cannot be turned back. 

Do not try to remove the operating lever at intermediate positions. 

 

 

 

 

 

 

Summary of Contents for 139-2021.9

Page 1: ...edium Voltage Switchgear Air Insulated Switchgear NXAIR M 24 kV 25 kA 2500 A Busbar Current OPERATING INSTRUCTIONS Order No 139 2021 9 Issue September 2018 Revision 07 Siemens AG 2018 All rights reserved ...

Page 2: ...ns we reserve the right to modify the specified values and drawings All dimensions are given in mm For further details e g about additional equipment please refer to catalog HA 25 71 Should further information be desired or should particular problems arise which are not covered sufficiently by these instructions the matter should be referred to the competent Siemens department The contents of this...

Page 3: ...ignal word indicates a potentially hazardous situation If the hazardous situation is not avoided death or serious injury can be the consequence CAUTION Signal word indicates a potentially hazardous situation If the hazardous situation is not avoided minor or moderate injury can be the consequence Definitions and symbols NOTICE Indicates a potentially damaging situation If the damaging situation is...

Page 4: ...s for double busbar system 21 7 3 Additional electromagnetic interlocks optional 21 7 4 Additional padlock interlock optional 22 7 5 Additional key operated interlock optional 22 8 Accessories 23 8 1 Operating tools 23 8 2 Service truck 25 8 3 Service truck versions 25 9 Customer support 28 9 1 Service 28 9 2 Repairs 28 9 3 Before you call 28 9 4 Service contact 28 10 Operating the circuit breaker...

Page 5: ... feeder manually 85 13 9 Removing the low voltage connector 85 13 10 Plugging on the low voltage connector 87 13 11 Taking the withdrawable circuit breaker fuse combination out of a panel or inserting in a panel 89 13 12 Replacement of HV HRC fuse links 89 14 Operating the circuit breaker panel for double busbar system 99 14 2 Position indicators visible on high voltage door panel A 101 14 3 Posit...

Page 6: ...locks 189 21 1 Key operated interlocks 189 21 2 Key operated interlocks for the busbar earthing switch 191 22 Fitting the earthing device 193 22 1 Design application and inspection of the earthing accessories 193 22 2 Connecting the earthing device 194 22 3 Removing the earthing device 201 23 Panels with motor operating mechanism control 205 23 1 Overview of functionality 205 23 2 Opening the cont...

Page 7: ...7 Switchgear extension 248 25 8 Spare part orders 248 25 9 Replacement of panels and components 248 25 10 Disposal 248 26 Trouble shooting 249 26 1 Panels 249 27 Index 251 Document information Title Operating Instructions Order number 139 2021 9 Additional order number 8BX3300 0LA00 0AD3 Revision 07 Issue September 2018 ...

Page 8: ...to IEC 62271 Part 200 may not be guaranteed anymore This applies especially though not exclusively to the following actions Original Siemens spare parts were not used Service technicians performing replacement were not trained and certified by Siemens Parts were fitted or adjusted incorrectly Settings were not made in accordance with Siemens specifications After installation and setting no final c...

Page 9: ...h a room is restricted to skilled electricians In the basic version the degree of protection of the enclosure of NXAIR M medium voltage switchgear is IP3XD according to IEC 60529 When the switchgear is operated within the technical parameters defined in these instructions the air insulated switchgear type NXAIR M is suitable for rated voltages up to Ur 24 kV and a maximum rated short time withstan...

Page 10: ...e monitored for their firmware vulnerability In case that any potential weak points are identified which might allow third parties to access to the protection relay information concerning this will be distributed by newsletter Please visit below website to register to the SIPROTEC and SICAM security update report to receive latest news www siemens com gridsecurity Before commissioning please ensur...

Page 11: ...e according to IEC 60529 Metallic positively driven shutters protect against accidental contact with live parts inside the panel Logical interlock between actuation circuit breaker disconnecting function and feeder earthing switch operating mechanism prevent maloperation Earthing of feeders by means of earthing switches with short circuit making capacity Mechanical position indicators for the with...

Page 12: ...eders max with circuit beaker A 2500 with disconnector A 2500 as bus coupler A 2500 as bus sectionalizer A 2500 4 2 Basic prescriptions and standards The indoor switchgear complies with the following prescriptions and standards IEC EN standard Switchgear 62271 1 62271 200 62271 210 Switching devices Circuit breakers 62271 100 Disconnectors earthing switches 62271 102 Circuit breaker fuse combinati...

Page 13: ...e and low voltage compartment containing the following information Fig 1 Rating plate 1 Switchgear type 5 Number of operating instructions for the panel 2 Serial number 6 Year of manufacture 3 Technical data 7 Panel number 4 Internal arc classification 8 Loss of service continuity category partition class The block type current transformers and the voltage transformers have their own type plates A...

Page 14: ...omponents 2770 Depth Panel design Depth mm Single busbar 1600 Circuit breaker panel for back to back arrangement panel A 1750 Disconnecting panel for back to back arrangement panel A Circuit breaker panel for back to back arrangement panel B 1600 Disconnecting panel for back to back arrangement panel B 4 7 Room planning According to chapter 6 in the Installation Instructions with order number 139 ...

Page 15: ...or circuit breaker for ratings of 24 kV Depending on the design of the NXAIR M switchgear circuit breakers type 3AE1 and type 3AE5 are used The assignment of the circuit breaker matching with the respective panel is shown on the rating plate A rating plate is provided on the operating mechanism unit of every circuit breaker type 3AE Fig 2 Circuit breaker type 3AE1 Fig 3 Circuit breaker type 3AE5 1...

Page 16: ...k Bus sectionalizer type 2 1 circuit breaker panel plus 1 bus riser panel optionally with withdrawable metering part Bus coupler type 1 1 circuit breaker panel plus 1 bus riser panel with withdrawable disconnector link Bus coupler type 2 1 circuit breaker panel plus 1 bus riser panel optionally with withdrawable metering part Circuit breaker panel with HV HRC fuse Further information to design fea...

Page 17: ...h natural ventilation Fig 11 Bus sectionalizer to the right 1 circuit breaker panel and bus riser panel 1 Can also be designed as a mirror image to the left Overview of panel types for single busbar system Fig 12 Circuit breaker panel panel A Fig 13 Circuit breaker panel panel B Fig 14 Circuit breaker panel panel A with natural ventilation Fig 15 Circuit breaker panel panel B with natural ventilat...

Page 18: ...ystems 11 Block type current transformers 12 Bushing type insulators 13 Busbar 14 Pressure relief duct 6 2 Basic design circuit breaker panel with HV HRC fuse Fig 17 Sectional view of circuit breaker panel with HV HRC fuse design A Switching device compartment B Busbar compartment C Connection compartment D Withdrawable circuit breaker fuse combination E Low voltage compartment 1 Metallic shutters...

Page 19: ...ow voltage connection 4 Operating and interlocking unit for circuit breaker 5 Vacuum interrupters 6 Operating and interlocking unit for racking the withdrawable part and for earthing 7 Feeder earthing switch 8 Connection for up to 4 cables per phase 9 Block type current transformers 10 Contact system 11 Voltage transformers 12 Bushing type insulators 13 Busbars 14 Pressure relief duct 15 Panel B F...

Page 20: ...OPEN position Plugging on the low voltage connector Consistent coding between connector and withdrawable part fulfilled Racking the withdrawable part to test position Circuit breaker in OPEN position Closing the circuit breaker Withdrawable part in interlocked end position test position or service position Closing the circuit breaker Undervoltage release not electrically operated Opening the circu...

Page 21: ...ble part fulfilled Racking the withdrawable part to test position Circuit breaker in OPEN position Closing the circuit breaker Withdrawable part in interlocked end position test position or service position Opening the circuit breaker None Operating the feeder earthing switch panel A only Withdrawable part in test position Release of the actuating opening for operating the feeder earthing switch b...

Page 22: ...ing openings only after removing the padlock Operating the busbar earthing switch Access to actuating openings only after removing the padlock Opening the high voltage door Access to actuating openings only after removing the padlock 7 5 Additional key operated interlock optional Action Additional preconditions Racking the withdrawable part to service position Access to actuating openings only aft...

Page 23: ...ly Fig 21 Operating lever for operating the feeder earthing switch or busbar earthing switch Fig 22 Hand crank for manual charging of the spring energy store in the circuit breaker Fig 23 Double bit key with a diameter of 5 mm for unlocking and interlocking the withdrawable part Fig 24 Double bit key with a diameter of 3 mm for opening and closing the door to the low voltage compartment ...

Page 24: ...ng tool for the removable voltage transformers optional Fig 26 Slip on lever for opening the shutters optional 1 for use on left side in panel and 2 for use on right side in panel Fig 27 Wall mounting holder for storage of operating tools optional 1 2 ...

Page 25: ... cause injuries by cuts or impacts Always park the service truck in such a way that nobody can pass by at the rear side e g move the rear side of the service truck close to a wall Using the service trucks Service trucks are exclusively designed for Transporting a corresponding withdrawable part Removing a withdrawable part from a panel Inserting a withdrawable part into a panel Service trucks are ...

Page 26: ...ories 26 NXAIR M 139 2021 9 07 On the right side of the service truck there is the pocket for the operating instructions Fig 29 Front page of operating instructions Fig 30 Rear page of operating instructions ...

Page 27: ...Accessories 139 2021 9 07 NXAIR M 27 For panels with removable voltage transformers Fig 31 Service truck to insert and remove the removable voltage transformers 1 Operating side 2 Rear side 1 2 ...

Page 28: ...e equipped with original spare parts for the switchgear 9 3 Before you call To help us deal with your query more quickly make sure that the following information is at hand Switchgear type 1 Serial no 2 Year of manufacture 3 Panel no 4 This information is available on the rating plate on the inside of the high voltage door and of the door to the low voltage compartment Fig 32 Rating plate 9 4 Serv...

Page 29: ... door 9 Control gate for opening and closing the actuating opening for racking the switching device 10 Actuating opening for racking the switching device 11 Actuating opening for inserting the double bit key to control racking of the withdrawable part 12 Mechanical position indicator for withdrawable part 13 Actuating opening for feeder earthing switch 14 Operating slide for opening and closing th...

Page 30: ...etween the individual compartments is IP2X in standard design The type of accessibility is provided as follows Compartment Type of accessibility Switching device compartment Interlock controlled Busbar compartment Tool based Connection compartment Access from the front side Interlock controlled and tool based Access from the rear side Tool based 10 4 Opening the high voltage door WARNING Reduced s...

Page 31: ... remove any parts of the covering Preconditions Withdrawable circuit breaker in test position Spring energy store in the circuit breaker discharged High voltage door closed Padlock optional removed from door handle In case of removable voltage transformers optional Removable voltage transformers in test position Procedure Pull the door handle upwards and open the high voltage door Fig 34 Opening t...

Page 32: ...tment was completed Before leaving the panel front CAUTION Injury The mechanism inside a withdrawable part can cause injuries by getting squeezed caught or cut Do not remove any parts of the covering HINT Unexpected motor noise and vibration When auxiliary voltage is applied a motor inside the circuit breaker starts immediately after plugging on the low voltage connector in order to charge the spr...

Page 33: ...al available In case of removable voltage transformers optional Removable voltage transformers in test position Procedure Push the door handle on the high voltage door totally upwards and hold it Press the high voltage door totally onto the panel frame using the door handle Push the door handle on the high voltage door totally downwards and release it Fig 36 Closing the high voltage door of the ci...

Page 34: ...or Disconnected position The withdrawable circuit breaker is disconnected from the busbar system and the outgoing feeder The auxiliary circuit is disconnected by pulling out the low voltage connector Short instruction for racking the withdrawable circuit breaker Racking the withdrawable circuit breaker manually from test position to service position Step 1 Insert and turn double bit key Step 2 Ins...

Page 35: ...ltage door Fig 37 Type 3AE1 Fig 38 Type 3AE5 Preconditions Withdrawable circuit breaker in test position Low voltage connector plugged on High voltage door closed Circuit breaker in OPEN position Feeder earthing switch in OPEN position Racking crank for moving the withdrawable circuit breaker available Double bit key available Padlock optional removed from operating slide For electromagnetic inter...

Page 36: ...reaker insert the double bit key and turn clockwise as far as it will go that is 90 Fig 42 Releasing access to the withdrawable part Push the racking crank for moving the withdrawable circuit breaker onto the operating shaft and turn clockwise as far as it will go Remove the racking crank for moving the withdrawable circuit breaker Turn the double bit key clockwise as far as it will go that is 90 ...

Page 37: ...vice position the position indicator is in service position vertical bar 10 8 Racking the withdrawable circuit breaker to test position NOTICE Maloperation Racking the withdrawable circuit breaker to service position is only permissible if the circuit breaker is in OPEN position Check through the inspection window in the high voltage door if the circuit breaker is in OPEN position Switch the circu...

Page 38: ...st position The actuating opening for racking the withdrawable circuit breaker is located on the control board of the high voltage door Fig 48 Actuating opening for racking the withdrawable circuit breaker Fig 49 Racking crank Fig 50 Double bit key diameter 5 mm Procedure NOTICE Maloperation All interlocks are only released when the withdrawable part is in a stable end position Rack the withdrawab...

Page 39: ... will go that is 90 to interlock the withdrawable circuit breaker Fig 52 Turning the racking crank counter clockwise Fig 53 Turning the double bit key counter clockwise Remove the double bit key To close the actuating opening push the operating slide down as far as it will go Fit a padlock optional to the operating slide and close it Fig 54 Position indicator OPEN test position The withdrawable ci...

Page 40: ...cted to the auxiliary voltage for the switching operation as otherwise closing is not possible HINT Unexpected motor noise and vibration Operating the circuit breaker discharges and or charges the spring energy store abruptly This causes a short loud noise and low vibration Expect switching noise and low vibration from inside the circuit breaker HINT The opening spring is charged during the closin...

Page 41: ... possible locally or from a central control The requirement of setting the panel to either local or remote control prevents operating the panel locally and centrally at the same time Depending on the intended operating mode set the panel to either local or remote control for example by switching the local remote switch HINT Unexpected motor noise and vibration Operating the circuit breaker dischar...

Page 42: ...control element The spring state indicator for the closing spring does not change Fig 56 Position indicator on the circuit breaker OPEN The position indicator on the circuit breaker changes from I position to 0 position The circuit breaker is open 10 11 Closing the circuit breaker manually NOTICE Conflicting operation The requirement of setting the panel to either local or remote control prevents ...

Page 43: ...witching operation as otherwise closing is not possible HINT Unexpected motor noise and vibration Operating the circuit breaker discharges and or charges the spring energy store abruptly This causes a short loud noise and low vibration Expect switching noise and low vibration from inside the circuit breaker HINT The opening spring is charged during the closing operation Preconditions Withdrawable ...

Page 44: ... the actuating opening After closing the closing spring is immediately automatically charged by the motor and the spring state indicator changes to CHARGED Fig 61 Position indicator on the circuit breaker CLOSED Take the push rod out of the actuating opening Close the cover of the actuating opening Optional Fit a padlock to the actuating opening The position indicator on the circuit breaker change...

Page 45: ...sition HINT Unexpected motor noise and vibration Operating the circuit breaker discharges and or charges the spring energy store abruptly This causes a short loud noise and low vibration Expect switching noise and low vibration from inside the circuit breaker HINT The opening spring is charged during the closing operation Preconditions Withdrawable circuit breaker in service position or in test po...

Page 46: ...rcuit breaker can be heard Fig 63 Actuating opening released Fig 64 High voltage door with push rod in the actuating opening The spring state indicator for the closing spring does not change Fig 65 Position indicator on the circuit breaker OPEN Take the push rod out of the actuating opening Close the cover of the actuating opening Optional Fit a padlock to the actuating opening The position indica...

Page 47: ...tor noise and vibration The spring energy store is discharged abruptly This causes a short loud noise and low vibration Expect switching noise and low vibration from inside the circuit breaker Preconditions Withdrawable circuit breaker in test position Circuit breaker in CLOSED position Spring state indicator for the closing spring shows CHARGED High voltage door closed Panel set to local control ...

Page 48: ...e circuit breaker If the control voltage fails the spring energy store for operating the circuit breaker is no longer charged automatically by the motor after the circuit breaker has been closed To operate the circuit breaker in spite of this the spring energy store must be charged manually with a hand crank The spring energy store in the circuit breaker can be charged manually both in test positi...

Page 49: ... setting the panel to either local or remote control prevents operating the panel locally and centrally at the same time For charging the spring energy store manually set the panel to local control for example by switching the local remote switch to LOCAL position Fig 68 Hand crank not removed Preconditions Withdrawable circuit breaker in service position or in test position Circuit breaker in OPE...

Page 50: ...nk 2 clockwise approx 25 turns until the CHARGED indication appears in the inspection window Fig 71 Hand crank on high voltage door The closing spring is latched in automatically The spring energy store indicator changes from NOT CHARGED to CHARGED Remove the hand crank Close access cover of operating shaft using the rotary button Manual charging of the spring energy store is completed The energy ...

Page 51: ...ch may be damaged Insert the operating lever in the actuating opening as far as it will go Instruction label on high voltage door In addition to these instructions an instruction label on the high voltage door informs about proper handling of the operating lever for the feeder earthing switch Fig 72 Instruction label on high voltage door Preconditions High voltage door closed Feeder to be earthed ...

Page 52: ...Procedure Lift the operating slide to release the actuating opening Fig 75 Lifting the operating slide While keeping the operating slide lifted insert the operating lever slightly into the actuating opening such that the pins in the operating lever are horizontal Insert the operating lever in the actuating opening as far as it will go Fig 76 Inserting the operating lever ...

Page 53: ...ever To close the actuating opening push the operating slide down as far as it will go Fit a padlock optional to the operating slide and close it The feeder is earthed 10 16 De earthing the feeder manually NOTICE A switching operation once started must be completed totally A switching operation that was not completed cannot be turned back Do not try to remove the operating lever at intermediate po...

Page 54: ... lever for the feeder earthing switch Fig 79 Instruction label on high voltage door Preconditions High voltage door closed Withdrawable circuit breaker in test position Operating lever available Padlock optional removed from operating slide For electromagnetic interlock optional Electromagnetic interlock deactivated Fig 80 Actuating opening on high voltage door Fig 81 Operating lever for operating...

Page 55: ...he operating lever are horizontal Insert the operating lever in the actuating opening as far as it will go Fig 83 Inserting the operating lever Hold the operating lever with one hand straight in the actuating opening and turn the operating lever with the other hand counter clockwise 180 until the feeder earthing switch changes to OPEN position Fig 84 Turning the operating lever counter clockwise F...

Page 56: ...g energy store in the circuit breaker discharged Auxiliary voltage for the panel disconnected High voltage door open Low voltage connector plugged on Procedure To detach the low voltage connector push the longitudinal fastener 1 of the coupling upwards Remove the low voltage connector 2 carefully to the front Fig 86 Detaching the low voltage connector Fig 87 Removing the low voltage connector Stow...

Page 57: ...ely after plugging on the low voltage connector in order to charge the spring energy store This is a permissible operating state Expect motor noise and low vibration Preconditions Withdrawable circuit breaker in test position Spring energy store in the circuit breaker discharged Auxiliary voltage for the panel disconnected High voltage door open Low voltage connector stowed away Procedure HINT In ...

Page 58: ...oltage connector push the longitudinal fastener 1 of the coupling downwards Fig 91 Plugging on the low voltage connector Fig 92 Locking the low voltage connector Close the high voltage door Switch the auxiliary voltage on The motor in the circuit breaker starts up and charges the spring energy store The position indicator for the spring energy store in the circuit breaker changes to CHARGED The lo...

Page 59: ...eight of withdrawable part Removing the withdrawable part without service truck can cause injuries Do not try to remove the withdrawable part while service truck is not interlocked with the panel Fig 93 Circuit breaker panel Fig 94 Circuit breaker panel without with high voltage door service truck open Preconditions Service truck available and selected according to the corresponding panel width Wi...

Page 60: ... front prevent being injured when taking the withdrawable circuit breaker out of the panel Make sure the service truck is correctly interlocked with the panel before moving the withdrawable circuit breaker onto the service truck Observe the notes and the operating instructions on the service truck Move the service truck centrally in front of the panel Push the locking elements on the left and righ...

Page 61: ...t and right unlocking levers at the service truck Check whether the service truck is correctly interlocked with the panel by pulling it backwards Fig 97 Service truck interlocked Unlocking the withdrawable circuit breaker from the panel To unlock the withdrawable circuit breaker from the panel frame turn the two locking levers at the withdrawable circuit breaker to the outside Fig 98 Unlocking the...

Page 62: ...rcuit breaker type 3AE5 Fig 100 Pulling out the withdrawable circuit breaker type 3AE1 Turn the two locking levers at the withdrawable circuit breaker to the inside in order to interlock the withdrawable circuit breaker with the service truck Fig 101 Interlocking the withdrawable circuit breaker Pull the two unlocking levers on the left and right side of the service truck upwards to release the in...

Page 63: ... The service truck is designed exclusively for slow and careful driving on obstacle free paths Before moving the service truck check the path Keep the shunting area and paths free of obstacles and dry Remove objects such as small parts installation material or tools from the floor in the travel area Move the service truck only slowly and constantly The service truck is not suitable for unsteady fl...

Page 64: ... Move the service truck only slowly and constantly The service truck is not suitable for unsteady floor such as stairs deepening or floor joints CAUTION Injury The mechanism inside the withdrawable circuit breaker can cause injuries by getting squeezed caught or cut Do not remove any parts of the covering Do not charge the spring energy store in the circuit breaker NOTICE Maloperation Risk of dama...

Page 65: ...panels also for control functions 5 Optional Coding symbol for current rating circuit breaker panels also for control functions 6 Top side of low voltage connector Fig 105 Coding symbols on low voltage connector and withdrawable part The coding symbols characterize the functional properties of a panel version The leftmost symbol 3 characterizes the functional properties as regards electromagnetic ...

Page 66: ...c control functions Examples For single use of symbols or for use in combinations of symbols Other than circuit breaker Rated current 3 rd symbol 5 optional Circuit breaker Rated current and extended control functions Other than circuit breaker Rated current Verifying correspondence of withdrawable part version and panel version A withdrawable part may only be inserted in a panel if the coding sym...

Page 67: ...witch in the switching device compartment If required put the coupling pin of the feeder earthing switch operating shaft in vertical position using the operating lever Fig 109 Operating the feeder earthing switch operating shaft Interlocking the service truck with the withdrawable circuit breaker at the panel CAUTION Maloperation Interlocks placed at the panel front prevent being injured when movi...

Page 68: ...le on service truck Withdrawable circuit breaker with the same coding as panel available Coupling pin of the operating shaft in vertical position Spring energy store in the circuit breaker discharged High voltage door open Low voltage connector stowed away Auxiliary voltage for the panel disconnected Move the service truck centrally in front of the panel Push the locking elements on the left and r...

Page 69: ...ft and right unlocking levers at the service truck Check whether the service truck is correctly interlocked with the panel by pulling it backwards Fig 112 Service truck interlocked with panel To release the interlocking of the withdrawable circuit breaker with the service truck turn the two locking levers at the withdrawable circuit breaker to the outside Fig 113 Releasing the interlocking of the ...

Page 70: ...rvice truck Push the withdrawable circuit breaker into the panel as far as it will go Fig 115 Pushing the withdrawable circuit breaker into the panel Unlocking the service truck from the panel Pull the two unlocking levers on the left and right side of the service truck upwards to release the interlocking with the panel frame Fig 116 Unlocking the service truck ...

Page 71: ...he withdrawable part is correctly interlocked with the panel as soon as both locking levers latch tight inside Fig 118 Interlocking the withdrawable circuit breaker Locking the low voltage connector HINT In addition to these instructions an instruction label on the withdrawable circuit breaker informs about plugging on the low voltage connector Follow the advice on the label 3 to push the longitud...

Page 72: ...connector push the longitudinal fastener 1 of the coupling downwards Fig 121 Plugging on the low voltage connector Fig 122 Locking the low voltage connector Close the high voltage door Switch the auxiliary voltage on The motor in the circuit breaker starts up and charges the spring energy store The position indicator for the spring energy store in the circuit breaker changes to CHARGED The withdra...

Page 73: ...or link 8 Mechanical position indicator for withdrawable disconnector link 9 High voltage door 10 Actuating opening for feeder earthing switch 11 Operating slide for opening and closing the actuating opening for operating the feeder earthing switch 12 Mechanical position indicator for feeder earthing switch 13 Operating slide for opening and closing the actuating opening for racking the withdrawab...

Page 74: ...dure for opening and or closing the high voltage door at the disconnecting panel is identical with the procedure for opening and or closing the high voltage door at the circuit breaker panel For opening and or closing the high voltage door at the disconnecting panel see chapter 10 4 and or 10 5 11 5 Racking the withdrawable disconnector link WARNING Injury due to effects of high voltage Racking th...

Page 75: ...opening The operating slide must otherwise always be interlocked mechanically by padlock This is also valid for panel versions with additional electromagnetic interlock HINT Panel versions with electromagnetic interlock are identified on the high voltage door with a label for interlocking the disconnecting function The procedure for racking the withdrawable disconnector link to service position an...

Page 76: ...el or inserting in a panel The procedure for inserting and or removing the withdrawable disconnector link in the disconnecting panel is identical with the procedure for inserting and or removing the withdrawable circuit breaker in the circuit breaker panel For inserting and or removing the withdrawable disconnector link in the disconnecting panel see chapter 10 20 and or 10 19 11 8 Earthing or de ...

Page 77: ...ol racking of the withdrawable metering part 6 Handle for opening the high voltage door 7 Mechanical position indicator for withdrawable metering part 8 High voltage door 9 Actuating opening for racking the withdrawable metering part 10 Operating slide for opening and closing the actuating opening for racking the withdrawable disconnector link 11 Test sockets for voltage detecting system type LRM ...

Page 78: ...nel For opening and or closing the high voltage door at the metering panel see chapter 10 4 and or 10 5 12 5 Racking the withdrawable metering part The procedure for racking the withdrawable metering part to service position and or test position is identical with the procedure for racking the withdrawable circuit breaker to service position and or test position For racking the withdrawable meterin...

Page 79: ...e disconnecting panel see chapter 10 17 and or 10 18 12 7 Taking the withdrawable metering part out of a panel or inserting in a panel The procedure for inserting and or removing the withdrawable metering part in the metering panel is identical with the procedure for inserting and or removing the withdrawable circuit breaker in the circuit breaker panel For inserting and or removing the withdrawab...

Page 80: ...e of withdrawable metering part Preconditions Withdrawable metering part in test position Padlock optional removed from door handle High voltage door open All voltage transformer MCBs are switched to OPEN position Low voltage connector stowed away Withdrawable metering part taken out of the panel Set of proper protection fuse links available Replacing protection fuse links for rated voltage 24 kV ...

Page 81: ...er use Remove the plastic tube and keep for later use Fig 130 Removing the fuse holder Fig 131 Fuse holder Loosen the protection fuse link by turning back and forth and pull it out of the voltage transformer housing with mounted contact cap Detach the contact cap from the protection fuse link Fig 132 Detaching the fuse link Fig 133 Removing the fuse link Fig 134 Detaching the contact cap 4 3 2 1 0...

Page 82: ... holder 2 Contact cap Fasten the fuse holder with the two steel bolts M6x20 plus steel washers 6 and tighten with 12 Nm Apply the plastic tube to the thread of the fuse holder fasten with the two plastic bolts M8x35 plus plastic washers 8 4 and tighten with 16 Nm Replace the other fuse links in the same way The protection fuse links have been replaced HINT Final procedure Next insert the withdrawa...

Page 83: ...breaker fuse combination 10 Actuating opening for racking the withdrawable circuit breaker fuse combination 11 Actuating opening for inserting the double bit key to control racking of the withdrawable circuit breaker fuse combination 12 Mechanical position indicator for withdrawable circuit breaker fuse combination 13 Actuating opening for feeder earthing switch 14 Operating slide for opening and ...

Page 84: ...t Type of accessibility Switching device compartment Interlock controlled Busbar compartment Tool based Connection compartment Access from the front side Interlock controlled and Tool based Access from the rear side Tool based 13 4 Opening or closing the high voltage door The procedure for opening and or closing the high voltage door at the circuit breaker panel with HV HRC fuse is identical with ...

Page 85: ...eaker panel with HV HRC fuse is identical with the procedure for discharging and or charging the closing spring in the circuit breaker panel For discharging and or charging the closing spring in the circuit breaker panel with HV HRC fuse see chapter 10 13 and or 10 14 13 8 Earthing or de earthing the feeder manually The procedure for earthing and or de earthing the feeder in the circuit breaker pa...

Page 86: ...or Place the low voltage connector 2 into the support located on the left side Fig 139 Low voltage connector placed on the left side If no withdrawable circuit breaker fuse combination is inserted in the panel and no further operation is executed Close the high voltage door The removed low voltage connector is placed at the support located on the left side 1 2 2 ...

Page 87: ... Withdrawable circuit breaker fuse combination in test position Spring energy store in the circuit breaker discharged Auxiliary voltage for the panel disconnected High voltage door open Low voltage connector hanged down on the side wall Procedure HINT In addition to these instructions an instruction label on the withdrawable circuit breaker fuse combination informs about plugging on the low voltag...

Page 88: ...inal fastener 1 of the coupling downwards Fig 142 Plugging on the low voltage connector Fig 143 Locking the low voltage connector Close the high voltage door Switch the auxiliary voltage on The motor in the circuit breaker starts up and charges the spring energy store The position indicator for the spring energy store in the circuit breaker changes to CHARGED The low voltage connector is plugged o...

Page 89: ...may be available at the HV HRC fuse during breaking Depending on the size of the operating voltage of such a system this applied voltage may then exceed 87 of the rated voltage It must therefore already be ensured during configuration of the switching devices and selection of the HV HRC fuse that only such fuse links are used which either satisfy the above operating conditions or whose breaking ca...

Page 90: ... 144 Circuit breaker fuse combination on the service truck Fig 145 Seen from front Arrangement of HV HRC fuse links HINT Fuse trip indicator When the high voltage door open a fuse trip indicator is visible inside the switching device compartment Tripped fuse links can be seen by checking the position of the fuse trip indicator on each phase The fuse link has not tripped if the fuse trip indicator ...

Page 91: ...lusively designed for operation with specific HV HRC fuse links Using the different type of fuse links may cause damages on the panel Use only the fuse link types listed in the following table Do not mount bridging links instead of HV HRC fuse links Selection table for HV HRC fuse links Rated voltage Ur kV Rated current Ir A Dimension e mm Order details 24 63 442 3001443 63 80 442 3002443 80 100 4...

Page 92: ... are only accessible after removing the HV HRC fuse links from the neighboring phase L1 or L3 First remove the HV HRC fuse links from the outer phases L1 and L3 on the left and right side of the circuit breaker fuse combination Then go on to remove the HV HRC fuse links from the middle phase L2 Preconditions Set of proper HV HRC fuse links available Withdrawable circuit breaker fuse combination ta...

Page 93: ...movable HV HRC fuse link 4 Clips for locking the covers Removing HV HRC fuse links First select one of the outer phases L1 or L3 Remove the insulation covers from the fuse assembly Push the clips towards the front insulation cover 2 from the right and left side until it is unlocked Fig 148 Pushing the clips towards the front insulation cover from the both side 2 2 1 3 4 ...

Page 94: ...r use Fig 149 Removing the front insulation cover Push the clips towards the rear insulation cover 1 from the right and left side until it is unlocked Fig 150 Pushing the clips towards the rear insulation cover from the both side Then take the rear insulation cover out of the fuse assembly and keep it for later use Fig 151 Removing the rear insulation cover 1 ...

Page 95: ...5 Fig 152 HV HRC fuse link on the fuse holder 5 Fuse holder Pull the HV HRC fuse link at the end upwards out of the clip of the fuse holder Fig 153 Pulling the HV HRC fuse link at the end Take the HV HRC fuse link out of the fuse holder and check empty fuse holder for damages 5 ...

Page 96: ...ith HV HRC fuse can be damaged Make sure the insulation covers are inserted on the withdrawable part before moving the withdrawable circuit breaker fuse combination into the panel Insert the new HV HRC fuse link Its striker must always point to the operating side of the withdrawable circuit breaker fuse combination The position of the striker is identified with a triangle representing an arrow on ...

Page 97: ...g the HV HRC fuse link Pull the ends slightly to check if the HV HRC fuse link is inserted firmly Insert the rear insulation cover into the housing and push it until the click noise is heard Fig 158 Pushing rear insulation cover into the housing Insert the front insulation cover into the housing and push it until the click noise is heard ...

Page 98: ...Proceed in the same way with the HV HRC fuse links of the other phases Fig 160 The HV HRC fuse links replaced The HV HRC fuse links have been replaced HINT Final procedure Insert the withdrawable part in the panel and de earth the feeder After closing the high voltage door the panel can be integrated into the course of operation again ...

Page 99: ...aker manually covered 8 Handle for opening the high voltage door 9 Control gate for opening and closing the actuating opening for racking the switching device 10 Actuating opening for racking the switching device 11 Actuating opening for inserting the double bit key to control racking of the withdrawable part 12 Mechanical position indicator for withdrawable part 13 Mechanical position indicator f...

Page 100: ...he circuit breaker manually covered 8 Handle for opening the high voltage door 9 Control gate for opening and closing the actuating opening for racking the switching device 10 Actuating opening for racking the switching device 11 Actuating opening for inserting the double bit key to control racking of the withdrawable part 12 Mechanical position indicator for withdrawable part 16 Operations counte...

Page 101: ...r OPEN position CLOSED OPEN Withdrawable circuit breaker Service position intermediate position or test position Service position Intermediate position Test position Spring state indicator CHARGED position or NOT CHARGED position CHARGED NOT CHARGED 14 4 Access to compartments Regarding accessibility to the individual compartments NXAIR M switchgear fulfills the loss of service continuity category...

Page 102: ...osition and or test position in the circuit breaker panel for double busbar system is identical with the procedure for racking the withdrawable circuit breaker to service position and or test position in the circuit breaker panel version for single busbar system For racking the withdrawable circuit breaker to service position and or test position in the circuit breaker panel for double busbar syst...

Page 103: ...l about the interlocking of the feeder earthing switch Preconditions Withdrawable part in panel A and B in test position For manual earthing and or de earthing the feeder in the circuit breaker panel for double busbar system see chapter 10 15 and or 10 16 14 11 Removing or plugging on the low voltage connector The procedure for removing and or plugging on the low voltage connector in the circuit b...

Page 104: ...he high voltage door The procedure for opening and or closing the high voltage door at the panel with removable voltage transformers is identical with the procedure for opening and or closing the high voltage door at the circuit breaker panel For opening and or closing the high voltage door at the panel with removable voltage transformers see chapter 10 4 and or 10 5 1 Actuating opening for rackin...

Page 105: ...or if you notice a resistance stop racking immediately Inform the regional Siemens representative Fig 165 Racking tool for the removable voltage transformers Preconditions Removable voltage transformers inserted in the panel Low voltage connector plugged on High voltage door closed Racking tool available Key for padlock available The actuating opening for racking the removable voltage transformers...

Page 106: ...167 Lifting the operating slide Insert the racking tool into the actuating opening with the guide pin pointing to the right Fig 168 Inserting the racking tool Push the racking tool into the door as far as it will go Turn the racking tool 90 counter clockwise to unlock the racking mechanism Fig 169 Turning the racking tool 90 counter clockwise for unlocking ...

Page 107: ...removable voltage transformers always up to the end position Turn the racking tool only in stable end positions of the removable voltage transformers To rack the removable voltage transformers push the racking tool into the voltage transformer compartment as far as it will go end position Fig 170 Pushing the racking tool to rack Turn the racking tool 90 clockwise to lock the racking mechanism Fig ...

Page 108: ...emove the racking tool Fig 172 Removing the racking tool To close the actuating opening push the operating slide down as far as it will go Fit a padlock to the operating slide and close it Fig 173 Fitting a padlock The removable voltage transformers are in service position ...

Page 109: ...ou hear a noise or if you notice a resistance stop racking immediately Inform the regional Siemens representative Fig 174 Racking tool for the removable voltage transformers Preconditions High voltage door closed Removable voltage transformers in service position Racking tool available Key for padlock available The actuating opening for racking the removable voltage transformers is located on the ...

Page 110: ...it Fig 176 Lifting the operating slide Insert the racking tool into the actuating opening with the guide pin pointing to the right Fig 177 Inserting the racking tool Push the racking tool into the door as far as it will go Turn the racking tool 90 counter clockwise to unlock the racking mechanism Fig 178 Turning the racking tool 90 counter clockwise to unlock ...

Page 111: ...use damages Rack the removable voltage transformers always up to the end position Turn the racking tool only in stable end positions of the removable voltage transformers To rack the removable voltage transformers pull the racking tool as far as it will go end position Fig 179 Pulling the racking tool to rack Turn the racking tool 90 clockwise to lock the racking mechanism Fig 180 Turning 90 clock...

Page 112: ... Remove the racking tool Fig 181 Removing the racking tool To close the actuating opening push the operating slide down as far as it will go Fit a padlock to the operating slide and close it Fig 182 Fitting a padlock The removable voltage transformers are in test position ...

Page 113: ... an activity inside the switching device compartment is interrupted Immediately after an activity inside the switching device compartment was completed Before leaving the panel front Preconditions Withdrawable circuit breaker in test position Removable voltage transformers in test position High voltage door open Low voltage connector plugged on Service truck available Removing the low voltage conn...

Page 114: ...ith the panel while moving the removable voltage transformers onto the service truck the switchgear and the removable voltage transformers can be seriously damaged The service truck must be interlocked with the panel before moving the removable voltage transformers onto the service truck Move the service truck centrally in front of the panel The guide lugs bring the service truck to the correct po...

Page 115: ...h the bolts To hook the locking levers in at the panel frame push the locking levers on the left and right side of the service truck downwards Fig 187 Hooking the locking levers To check whether the service truck is correctly interlocked with the panel pull the service truck backwards using the handle Fig 188 Pulling the service truck back to check interlocking The service truck is interlocked wit...

Page 116: ...position on the service truck Lift the handle of the removable voltage transformers Keep it lifted and pull the removable voltage transformers onto the service truck as far they will go In the end position the removable voltage transformers are automatically interlocked with the service truck Fig 189 Pulling the voltage transformers onto the service truck Fig 190 Automatic interlocking on service ...

Page 117: ...gh voltage door is an important safety element of the switchgear The high voltage door is exclusively opened for performing operational activities inside the switching device compartment such as removing or inserting a withdrawable circuit breaker and or removable voltage transformers Close the high voltage door If an activity inside the switching device compartment is interrupted Immediately afte...

Page 118: ...ruck must be interlocked with the panel before moving the removable voltage transformers into the panel Move the service truck with the removable voltage transformers on top centrally in front of the panel The guide lugs bring the service truck directly to the correct position at the panel frame Fig 193 Moving the service truck centrally in front of the panel If necessary adjust the height of the ...

Page 119: ...whether the service truck is correctly interlocked with the panel pull the service truck backwards using the handle Fig 196 Pulling the service truck back to check interlocking The service truck is interlocked with the panel Inserting the removable voltage transformers in the panel To undo the interlocking between the removable voltage transformers and the service truck push the lever to the left ...

Page 120: ...erting the removable voltage transformers in the panel Push the handle down to interlock the removable voltage transformers with the panel Fig 199 Pushing the handle down The removable voltage transformers are inserted in the panel Removing the service truck from the panel To detach the locking levers from the panel frame pull the locking levers on the left and right side of the service truck Fig ...

Page 121: ...ow voltage connector HINT In addition to these instructions an instruction label on the removable voltage transformers informs about plugging on the low voltage connector Follow the advice on the label 3 to push the longitudinal fastener Fig 202 Instruction label on removable voltage transformers Take the low voltage connector out of the shelf on the left inside the panel Fig 203 Low voltage conne...

Page 122: ...e and close it The removable voltage transformers are inserted in the panel 15 7 Replacing protection fuse links NOTICE Maloperation Removable voltage transformers are exclusively designed for operation with specific protection fuse links Use only the fuse link types listed in the following table Do not mount bridging links instead of protection fuse links HINT Tripped protection fuse links can ca...

Page 123: ...voltage transformer rating plate Further technical data is shown on the rating plate of each removable voltage transformer Fig 205 Rating plate on removable voltage transformer Preconditions Removable voltage transformers taken out of the panel Set of proper protection fuse links available Procedure Move the service truck with the removable voltage transformers away from the panel The protection f...

Page 124: ...ntact cap from the protection fuse link Fig 208 Detaching the contact cap Mount the contact cap on the new protection fuse link Push the new protection fuse link into the housing Perform replacement with all other fuse links The protection fuse links have been replaced HINT Final procedure Next insert the removable voltage transformers in the panel After closing the high voltage door the panel can...

Page 125: ...l high voltage is still applied there is danger to life Before performing any kind of checks or work in the busbar compartment or the connection compartment of each panel verify safe isolation from supply in these compartments without any doubt Observe the Five Safety Rules To verify safe isolation from supply do exclusively use intact LRM voltage indicators that have been tested immediately befor...

Page 126: ...solated from supply Indication does not light up or flash Phase isolated from supply NOTICE Device system LRM Before verifying safe isolation from supply with the LRM device system do absolutely check proper functioning of the LRM ST voltage indicator Fig 212 LRM ST voltage indicator 1 Documentation to repeat test of interface condition 2 Cover of test socket for L1 removed 3 LRM ST plugged in for...

Page 127: ...ontact pins of the LRM ST voltage indicator into the test sockets at the function test unit Perform the test Alternative test method If no function test unit is available to check the LRM ST voltage indicator the check must be executed on a live panel Procedure Remove the cover from the test sockets the cover remains permanently at the panel Plug the contact pins of the LRM ST voltage indicator in...

Page 128: ...nts without any doubt Observe the Five Safety Rules To verify safe isolation from supply do exclusively use intact LRM voltage indicators that have been tested immediately before Please do absolutely observe the enclosed operating instructions for the function test unit and the voltage indicator Preconditions High voltage door closed Door to low voltage compartment closed Tested LRM ST voltage ind...

Page 129: ...over on the test socket Proceed in the same way with the test sockets for L2 and then for L3 Safe isolation from supply is verified as soon as L1 L2 and L3 have been determined to be isolated from supply 16 6 CAPDIS and VOIS systems overview CAPDIS S1 Integrated capacitive voltage detecting system CAPDIS S2 Integrated capacitive voltage monitoring system with relay output VOIS Economic integrated ...

Page 130: ...ver open Fig 219 CAPDIS S2 cover closed Fig 220 CAPDIS S2 cover open 1 LC display 2 Test socket L2 3 Earth socket 4 Test socket L3 5 Test socket L1 1 Test button 2 Cover 3 LC display 4 Duct for signaling cables CAPDIS M 5 Test socket L2 6 Earth socket 7 Test socket L3 8 Test socket L1 9 Short instructions ...

Page 131: ... Test passed lights up shortly A6 Indication Test not passed lights up shortly A7 Overvoltage present lights up permanently A8 Indication ERROR e g in case of missing auxiliary voltage Fig 221 Indications VOIS VOIS R CAPDIS S1 S2 Features VOIS VOIS R CAPDIS S1 CAPDIS S2 VOIS VOIS R CAPDIS S1 CAPDIS S2 Integrated display without auxiliary power Integrated display without auxiliary power Maintenance...

Page 132: ...tment or the connection compartment of each panel verify safe isolation from supply in these compartments without any doubt Observe the Five Safety Rules Preconditions High voltage door closed Door to low voltage compartment closed Indication Operational high voltage not present visible Safe isolation from supply is verified as soon as L1 L2 and L3 have been determined to be isolated from supply 1...

Page 133: ...n the front upper area of the low voltage compartment Fig 222 Control elements of earthing switch for busbar system WARNING Risk of falling Falling from a ladder can lead to injuries and bone fractures Observe the guidelines for the use of working materials Use approved electrician s ladders only Observe the manual and the instructions on the ladder NOTICE Maloperation A switching operation once s...

Page 134: ...Fig 223 Instruction label on door to low voltage compartment Preconditions Busbar earthing switch in OPEN position Intended opening of the padlock released externally Operating lever available Electrician s ladder available as double step ladder Electromagnetic interlock optional deactivated If a withdrawable part is inserted in the panel Withdrawable part in test position Low voltage connector pl...

Page 135: ...ed Lift the operating slide and hold it Fig 226 Lifting the operating slide actuating opening free Actuating opening for busbar earthing switch The actuating opening for the busbar earthing switch has different receptacles for inserting the operating lever for closing and opening the busbar earthing switch Fig 227 Actuating opening for busbar earthing switch Fig 228 Inserting the operating lever f...

Page 136: ...ng as far as it will go Hold the operating lever with one hand straight in the actuating opening and turn the operating lever with the other hand clockwise as far as it will go approx 115 until the busbar earthing switch changes to CLOSED position Fig 230 Closing the busbar earthing switch Fig 231 Closing the busbar earthing switch using an electrician s ladder While turning the operating lever th...

Page 137: ... operating lever To close the actuating opening push the operating slide down as far as it will go Fit a padlock to the operating slide and close it The busbar earthing switch has been switched from the OPEN position to the CLOSED position thus earthing the busbar The position indicator of the busbar earthing switch changes from the OPEN position via the intermediate position to the CLOSED positio...

Page 138: ... a ladder can lead to injuries and bone fractures Observe the guidelines for the use of working materials Use approved electrician s ladders only Observe the manual and the instructions on the ladder NOTICE Maloperation A switching operation once started must be completed totally A switching operation that was not completed cannot be turned back Do not try to remove the operating lever at intermed...

Page 139: ...tions Busbar earthing switch in CLOSED position Intended opening of the padlock released externally Operating lever available Electrician s ladder available as double step ladder Electromagnetic interlock optional deactivated Fig 237 Operating lever for operating the busbar earthing switch Procedure Ensure that the intended manual switching operation has been released externally Make sure accordin...

Page 140: ...old it Fig 239 Lifting the operating slide actuating opening open Actuating opening for busbar earthing switch The actuating opening for the busbar earthing switch has different receptacles for inserting the operating lever for closing and opening the busbar earthing switch Fig 240 Actuating opening for busbar earthing switch Fig 241 Inserting the operating lever for opening ...

Page 141: ... far as it will go Hold the operating lever with one hand straight in the actuating opening and turn the operating lever with the other hand counter clockwise as far as it will go approx 115 until the busbar earthing switch changes to OPEN position Fig 243 Opening the busbar earthing switch Fig 244 Opening the busbar earthing switch using an electrician s ladder While turning the operating lever t...

Page 142: ...rating lever To close the actuating opening push the operating slide down as far as it will go Fit a padlock to the operating slide and close it The busbar earthing switch has been switched from the CLOSED position to the OPEN position thus de earthing the busbar The position indicator of the busbar earthing switch changes from the CLOSED position via the intermediate position to the OPEN position...

Page 143: ...Verify safe isolation from supply Put on personal protective equipment Isolate and earth the busbars in the busbar compartment Padlock the shutter mechanism on the right side in the switching device compartment unless you intend to open the shutter to the connection compartment too Open the shutter to the busbar compartment safely Only use the slip on lever Never try to open the shutter mechanism ...

Page 144: ...w voltage connector stowed away Withdrawable part taken out of the panel Fig 248 Slip on lever for opening the shutter marked with L Padlock the shutter mechanism on the right side in the switching device compartment Fig 249 Padlocking the shutter mechanism on the right side in the switching device compartment Push the slip on lever marked with L on the shutter mechanism on the left side in the sw...

Page 145: ... slip on lever latches tight and the shutter opens Fig 250 Pushing on the slip on lever Fig 251 Pushing the handle downwards to end position Fig 252 Shutter to busbar compartment open The shutter to the busbar compartment is open HINT Final procedure Immediately proceed to perform a voltage test with recommended suitable equipment or other intended operations ...

Page 146: ...ave not been isolated the contacts will be live at operational high voltage Observe the Five Safety Rules Before opening the shutter to the connection compartment Verify safe isolation from supply Put on personal protective equipment Isolate and earth the cable bar connections in the connection compartment Padlock the shutter mechanism on the left side in the switching device compartment unless yo...

Page 147: ...wer shutter Preconditions Withdrawable part in test position Padlock optional removed from door handle High voltage door open Low voltage connector removed and stowed away Withdrawable part taken out of the panel Fig 253 Slip on lever for opening the shutter marked with R Padlock the shutter mechanism on the left side in the switching device compartment Fig 254 Padlocking the shutter mechanism on ...

Page 148: ...n lever latches tight and the shutter opens Fig 255 Pushing on the slip on lever Fig 256 Pushing the handle downwards to end position Fig 257 Shutter to the connection compartment open The shutter to the connection compartment is closed HINT Final procedure Immediately proceed to perform a voltage test with recommended suitable equipment or other intended operations ...

Page 149: ...safety relevant parts Remove the padlock before inserting the withdrawable part Push the handle of the slip on lever slightly to the left to release the latch and let it slip upwards The shutter closes Remove the slip on lever Remove the padlock from the left side in the switching device compartment The shutter to the connection compartment is closed ...

Page 150: ...in the connection compartment will be live at operational high voltage Before removing the vertical partition inside the switching device compartment of a panel isolate and earth the cable bar connections in the connection compartment Provide a warning on the high voltage door to indicate activities in the connection compartment Observe the Five Safety Rules Verify safe isolation from supply Do no...

Page 151: ...e door is in vertical I position Fig 258 Position indicator of feeder earthing switch on high voltage door Open the high voltage door Take the withdrawable part out of the panel HINT Position indicator of the feeder earthing switch An additional position indicator of the feeder earthing switch is visible inside the switching device compartment The feeder earthing switch is earthed if the additiona...

Page 152: ...rupted Immediately after an activity inside the connection compartment was completed CAUTION Sharp edges The metal parts of the vertical partition may have sharp edges Put on personal protective equipment Preconditions Preparations as described in chapter 19 1 completed Procedure Panel versions with withdrawable circuit breaker withdrawable circuit breaker fuse combination or withdrawable disconne...

Page 153: ...ont is given HINT Final procedure steps Immediately proceed to perform the intended checks and works in the connection compartment 19 3 Installing the vertical partition in the switching device compartment DANGER Electric shock To perform any kind of activities inside or near the connection compartment of a panel you must ensure that this compartment is safely isolated from supply Without isolatio...

Page 154: ...nection compartment Clean polluted areas in the connection compartment To do this use a vacuum cleaner and a lint free cloth If necessary moisten the cloth use a mild household cleaner and dry properly at the end Some parts and surfaces of the switchgear are greased for functioning Do not remove the grease there do not clean the parts and surfaces If greased areas are dirty clean the dirty area an...

Page 155: ...er fuse combination or withdrawable disconnector link only Protection plate of switching device compartment available Connecting elements available 4 nuts M8 with contact washers All panel versions Partition available Connecting elements available 10 bolts M8x20 with contact washers and plain washers 5 bolts M8x20 with contact washers Procedure Install the partition 2 between the connection compar...

Page 156: ...le disconnector link only Install the protection plate of the switching device compartment 1 To fix the protection plate of the switching device compartment 1 tighten the nuts 5 hand tight 4 nuts M8 with contact washers Tighten the fixing bolts 5 with a tightening torque of 25 Nm Fig 264 4 bolted joints on protection plate of switching device compartment The partition between the connection compar...

Page 157: ...mpartment is an important safety element of the switchgear The connection compartment is exclusively opened for performing operational activities inside the connection compartment Always install the partition between the connection compartment and the switching device compartment If an activity inside the connection compartment is interrupted Immediately after an activity inside the connection com...

Page 158: ...nditions Preparations as described in chapter 19 1 completed Fig 265 Panel prepared Procedure Detach the holder of the air guide To do this loosen the lower bolt 2 and unscrew and store the upper bolt 1 Proceed in the same way on the other side Fig 266 Bolts for detaching the holder 1 2 ...

Page 159: ...e air guide upwards Fig 268 Air guide folded upwards Unscrew the upper bolts from the partition and store them Fig 269 3 bolted joints on partition Unscrew the lateral bolts from the partition and the base frame and store them Proceed in the same way on the other side Fig 270 6 lateral bolted joints on partition and base frame ...

Page 160: ...x 2 cm Pull the ventilation duct out of the panel and store it Fig 271 4 bolted joints on base frame front Fig 272 Lifting and pulling Fig 273 Ventilation duct removed Fig 274 Switching device compartment without ventilation duct Please observe during all other removal and installation work that the links on the panel base are not dented Fig 275 2 links on panel base Fig 276 Correct position of th...

Page 161: ...g device compartment 1 from the switching device compartment and store it Fig 277 4 bolted joints on protection plate of switching device compartment Remove the 16 connecting elements from the partition 2 to the connection compartment inside the switching device compartment and store them 16 bolts M8x20 and plain washers 4 Remove the partition 2 and store it Fig 278 16 bolted joints on partition A...

Page 162: ...ion duct and the vertical partition may have sharp edges Put on personal protective equipment NOTICE Danger due to damages Possible malfunctioning and switchgear damage caused by foreign objects Remove all foreign objects from the connection compartment for example Tools Unused installation material Packing material Cleaning material NOTICE Cleaning Possible malfunctioning and damage to the panels...

Page 163: ... the thread In addition to these instructions an instruction label on the vertical partition informs about safe fastening of the partition Fig 279 Instruction label on the vertical partition Preconditions Feeder earthing switch in CLOSED position High voltage door open Low voltage connector stowed away Protection plate and associated bolting material available 4 nuts M8 with contact washers Vertic...

Page 164: ...und hand tight 16 bolts M8x20 with contact washers and plain washers 4 Tighten the fixing bolts all around with torque 25 Nm Fig 280 15 bolted joints on partition Install the protection plate of the switching device compartment 1 Fix the protection plate 1 by bolting the nuts 5 hand tight 4 nuts M8 with contact washers Tighten the fixing nuts 5 with torque 25 Nm Fig 281 4 bolted joints on protecti...

Page 165: ...nt in correct position Make sure that the air guide 1 of the ventilation duct is folded upwards Fig 284 Ventilation duct with air guide folded upwards 1 Air guide folded upwards 2 Bottom side Set the ventilation duct down centrally on the base frame of the panel The side of the ventilation duct holding the air guide 1 must border on the vertical partition Fig 285 Ventilation duct placed centrally ...

Page 166: ... Fasten the lateral bolts size M8x20 with contact washers at the vertical partition and the base frame hand tight Tighten the bolts with torque 25 Nm Proceed in the same way on the other side Fig 287 6 lateral bolted joints on partition and base frame Fasten the upper bolts size M8x20 with contact washers at the vertical partition hand tight Tighten the bolts with torque 25 Nm Fig 288 3 bolted joi...

Page 167: ...nd tight Tighten the bolts with torque 25 Nm Proceed in the same way on the other side Fig 290 Bolts for fixing the air guide The vertical partition and the ventilation duct are installed HINT Final procedure steps Now the panel can be integrated into the course of operation again for example Inserting the withdrawable part in the panel Closing the high voltage door De earthing the feeder Racking ...

Page 168: ... partition If an activity inside the connection compartment is interrupted Immediately after an activity inside the connection compartment was completed CAUTION Sharp edges The metal parts of the voltage transformer compartment and the vertical partition may have sharp edges Put on personal protective equipment CAUTION High weight The voltage transformer compartment is heavy Remove the voltage tra...

Page 169: ...and store it For panel width 1000 mm Remove the metal cover 6 and store it Remove 8 bolts M8x20 at the voltage transformer compartment and store them Fig 293 8 bolted joints on voltage transformer compartment Fig 294 Voltage transformer compartment removed Take the voltage transformer compartment 3 out of the panel to the front and store it Remove 4 nuts M8 at the protection plate of the switching...

Page 170: ...m the switching device compartment and store it Remove the bolted joint 3 at the 3 connecting cables from the cable connections to the insulating bushings for the removable voltage transformers Remove the bolting elements and store them Fig 297 Bolted joints at the cable connections Loosen the 3 connecting cables 8 for the removable voltage transformers from the cable connections 6 bolted joints M...

Page 171: ... NXAIR M 171 Remove the bushing plate with bushings 5 from the switching device compartment and store it Fig 299 Switching device compartment prepared for cable installation from the front The connection compartment is accessible through the switching device compartment ...

Page 172: ... voltage transformer compartment and the vertical partition may have sharp edges Put on personal protective equipment NOTICE Danger due to damages Possible malfunctioning and switchgear damage caused by foreign objects Remove all foreign objects from the connection compartment for example Tools Unused installation material Packing material Cleaning material NOTICE Cleaning Possible malfunctioning ...

Page 173: ... bolts M8x20 with contact washers and plain washers Connecting cables and associated bolting material available 3 nuts M8 with contact washers and plain washers Vertical partition and associated bolting material available 8 bolts M8x20 with contact washers and plain washers Protection plate and associated bolting material available 4 nuts M8 with contact washers Voltage transformer compartment and...

Page 174: ... with bushings Fasten the 3 connecting cables 8 for the removable voltage transformers at the cable connections Fig 301 Bolted joints at the cable connections Insert the partition 2 and fasten with 8 bolts M8x20 with contact washers and plain washers Tighten the bolts with torque 25 Nm Fig 302 8 bolted joints on partition ...

Page 175: ...rt the voltage transformer compartment 3 in the panel towards the front and fasten with 8 bolts M8x20 with contact washers Tighten the bolts with torque 25 Nm Fig 304 8 bolted joints on voltage transformer compartment Fig 305 Voltage transformer compartment removed Insert the wiring duct cover 4 and fasten with 3 5 bolts M8x20 with contact washers Tighten the bolts with torque 25 Nm Fig 306 3 bolt...

Page 176: ... horizontally arranged Check if the top edge of the shutter is flush with the shutter frame 4 Check if the levers 2 are in perfectly straight condition Fig 308 Checking state and position of shutter and levers 1 Shutter 2 Lever 3 Labyrinth 4 Shutter frame The bushing plate the vertical partition and the voltage transformer compartment are installed HINT Final procedure steps Now the panel can be i...

Page 177: ...rovide a warning on the high voltage door to indicate activities in the connection compartment on the rear side of the panel Observe the Five Safety Rules Verify safe isolation from supply Do not operate the feeder earthing switch during any activities inside or near the connection compartment Do not remove any ledges on the rear side of the busbar compartment WARNING Reduced safety The closed con...

Page 178: ...ng device compartment High voltage door closed Withdrawable part in test position Feeder earthing switch in CLOSED position Procedure Check if the position indicator of the feeder earthing switch on the high voltage door is in vertical I position Fig 309 Position indicator on high voltage door Access to the connection compartment through the rear side of the panel is described hereafter by the exa...

Page 179: ...ents from one of the vertical ledges 2 14 bolts M8x20 with contact washers Remove the vertical ledge and store it together with the associated bolting material Proceed in the same way with the other vertical ledge Remove the sealing brackets 3 and store them Fig 311 Rear wall with ledges 1 Horizontal ledge 2 Vertical ledges 3 Sealing brackets Unscrew and remove the bolting material at the panel ba...

Page 180: ...mpartment is safely isolated from supply Without isolation from supply the cables bars in the connection compartment will be live at operational high voltage Observe the Five Safety Rules Verify safe isolation from supply Make sure all openings on the rear side are closed by fixing bolts before the panel is put into operation again Do not operate the feeder earthing switch during any activities in...

Page 181: ...nd surfaces of the switchgear are greased for functioning Do not remove the grease there do not clean the parts and surfaces If greased areas are dirty clean the dirty area and grease again according to the maintenance instructions Preconditions Rear wall available Corresponding number of sealing brackets ledges and associated bolting material available 2 nos sealing brackets 1 no horizontal ledge...

Page 182: ...e bolts in hand tight 8 bolts M8x25 with contact washers and plain washers size 8 acc to ISO 7093 Tighten the bolts with torque 25 Nm Install one of the vertical ledges 5 Fix it by screwing the bolts in hand tight 14 bolts M8x20 with contact washers Tighten the bolts with torque 25 Nm Proceed in the same way with the other vertical ledge 3 Sealing brackets 4 Horizontal ledge 5 Vertical ledges Fig ...

Page 183: ...panel isolate and earth the cable connections in the connection duct Provide a warning on the high voltage door to indicate activities in the connection duct on the rear side of the panel Observe the Five Safety Rules Verify safe isolation from supply Do not operate the feeder earthing switch during any activities inside or near the connection duct WARNING Reduced safety The closed connection duct...

Page 184: ...available for later reuse Preconditions Withdrawable part inserted in the switching device compartment High voltage door closed Withdrawable part in test position Feeder earthing switch in CLOSED position Procedure Check if the position indicator of the feeder earthing switch on the high voltage door is in vertical I position Fig 315 Position indicator on high voltage door Remove the connecting el...

Page 185: ... Remove the vertical ledges and store them together with the associated connecting elements Proceed in the same way with the other vertical ledges Loosen the connecting elements of the lower rear wall at the panel base 6 4 6 bolts M8x20 with contact washers Remove the rear wall 4 To do this lift the rear wall by the handle and pull it out Store the rear wall Loosen the connecting elements of the u...

Page 186: ...om supply Make sure all openings on the rear side are closed by fixing bolts before the panel is put into operation again Do not operate the feeder earthing switch during any activities inside or near the connection duct CAUTION Sharp edges The metal parts of the rear walls may have sharp edges Put on personal protective equipment CAUTION High weight The upper rear wall is heavy Mount the upper re...

Page 187: ...reconditions Upper and lower rear wall available Corresponding number of ledges and associated bolting material available 1 no horizontal ledge 4 nos vertical ledges Bolts size M8x20 with contact washers and plain washers Procedure Insert the lower rear wall 4 at the rear side of the panel and push it down using the handle Fix the rear wall by screwing the lower bolts in hand tight 4 6 bolts M8x20...

Page 188: ...for lower rear wall Install the horizontal ledge 3 Fix it by screwing the bolts in hand tight 12 14 bolts M8x20 with contact washers and plain washers with the bolt fixing in the area of the vertical ledges Tighten the bolts with torque 25 Nm The rear walls are installed on the connection duct HINT Final procedure steps Now the panel can be integrated into the course of operation again for example...

Page 189: ...locked by turning and removing the associated key If the feeder earthing switch is in CLOSED position switching it to OPEN position can be interlocked by turning and removing the associated key The interlocked functions can be released again by reinserting the associated key and subsequently turning it in opposite direction For customization the interlocking options are available individually and ...

Page 190: ...it is possible to lift the cover To interlock an operating function turn the associated key counter clockwise as far as it will go that is 180 and remove it Example The feeder earthing switch is in CLOSED position 2 To interlock switching to OPEN turn the associated key 1 counter clockwise as far as it will go and remove it To release an interlocked function insert the associated key and turn cloc...

Page 191: ...sition can be interlocked by turning and removing the associated key If the busbar earthing switch is in CLOSED position switching it to OPEN position can be interlocked by turning and removing the associated key An interlocked function can be released again by reinserting the associated key and subsequently turning it in opposite direction For customization the interlocking options are available ...

Page 192: ...unter clockwise as far as it will go 1 and remove it 2 Fig 322 Interlocking switching to OPEN Fig 323 Position indicator for busbar earthing switch CLOSED To release an interlocked function insert the associated key and turn clockwise as far as it will go that is 180 Example The busbar earthing switch is in CLOSED position To release switching to OPEN insert the associated key 1 and turn clockwise...

Page 193: ...it current and the maximum permissible short circuit duration Do not use the earthing device for short circuit tests or purposes causing similarly high voltages and currents Perform diligent inspection of the earthing accessories before each application Panel width 800 mm Max short circuit current and max short circuit duration 25 kA 1 s Diameter of the fixed contacts in the bushings 60 mm Rated n...

Page 194: ...27 Copper wires without coloration Fig 328 Copper wires with brown coloration Perform a manual check of the earthing device and the earthing rod Especially check if all bolted joints at the earthing tulips are firmly tightened If a check shows tangible problems Do not use these earthing accessories Contact the local superior and responsible person Inspection of the earthing accessories is successf...

Page 195: ...arthing accessories before each application Preconditions Withdrawable part taken out of the panel Low voltage connector stowed away Both shutter to the connection compartment and shutter to the busbar compartment closed Bushing contacts to be earthed isolated Earthing accessories available and in perfect condition Slip on lever for opening the shutter available Padlock for shutter not to be used ...

Page 196: ...the left and right side in the switching device compartment can cause injuries by getting squeezed caught or cut Do not remove any parts of the covering Do not reach into the shutter mechanism with hands or tools Bolt the earthing clamp hand tight to the earthing point of the panel using the screw handle This corresponds to a tightening torque of approx 20 Nm Fig 331 Bolting the earthing clamp Fig...

Page 197: ...he shutters is open close it before opening the other Make sure that the mechanism of the shutter not to be opened is secured with a padlock Open the shutter safely Open the shutter strictly as described in chapter 18 Operating the shutters and observe all safety instructions therein While a shutter is open Do not reach into or enter the switching device compartment Do not insert any objects in th...

Page 198: ...ushing contacts in the lower row of bushings linked with the connection compartment DANGER Electric shock Perform the following activities in the presence of an observer until the earthing device is completely mounted to all three bushing contacts In case of emergency this person can call for help Exclusively use the associated earthing rod for attaching the earthing tulips to the bushing contacts...

Page 199: ...afe hand area with both hands The limit of the safe hand area is marked by a ring Fig 335 Seizing the earthing rod in the safe hand area Lead the coupling of the earthing rod with the earthing tulip on it towards the central bushing contact and push the earthing tulip firmly onto the bushing contact Hereby the earthing rod must point exactly towards the bushing contact Continue pushing the earthin...

Page 200: ... pulling Fig 336 Tightening the earthing tulip on the bushing contact Fig 337 Detaching the earthing rod To earth the outer bushing contacts proceed in the same way Fig 338 Earthing tulip fixed on central bushing contact Fig 339 Earthing device completely mounted The earthing device is completely mounted ...

Page 201: ...wn how to detach the earthing device from the bushing contacts in the upper row of bushings linked with the busbar compartment Proceed in the same way when detaching the earthing device from the bushing contacts in the lower row of bushings linked with the connection compartment DANGER Electric shock Always observe the Five Safety Rules Exclusively use the associated earthing rod for detaching the...

Page 202: ...ng rod must point exactly towards the earthing tulip Align the guides in the coupling of the earthing rod with the two cross bolts on the spindle of the earthing tulip Plug the earthing rod on the earthing tulip and push it in until the two cross bolts touch the end of the guides Fig 342 Plugging the earthing rod onto the tulip Continue pushing the earthing rod slightly towards the earthing tulip ...

Page 203: ...far away as possible from the bushing contacts Pull the earthing tulip off the earthing rod and put it carefully on the panel base Fig 345 Pulling off the tulip To detach the other two earthing tulips proceed in the same way Closing the shutter DANGER Electric shock Close the shutter strictly as described in chapter 18 Operating the shutters but leave the other shutter padlocked Close the shutter ...

Page 204: ...e any parts of the covering Do not reach into the shutter mechanism with hands or tools Unbolt the earthing clamp from the earthing point of the panel using the screw handle Remove the earthing clamp Fig 346 Earthing clamp connected with earthing point Fig 347 Unscrewing the earthing clamp Remove the earthing device from the switching device compartment Remove the padlock from the mechanism of the...

Page 205: ...rical operation can be operated independently from one another Hence any combination is possible Withdrawable circuit breaker Feeder earthing switch Busbar earthing switch Racking Switching Switching Electrical or manual operation Manual operation only Manual operation only Electrical or manual operation Electrical or manual operation Manual operation only Manual operation only Electrical or manua...

Page 206: ...control door Fig 349 Circuit breaker type 3AE1 control door padlocked Fig 350 Circuit breaker type 3AE5 control door padlocked 1 Control door 2 Type 3AE5 handle 3 Type 3AE5 appliance for fitting padlock 4 Type 3AE1 handle with padlock Second the user is required to select the appropriate access mode before racking manually or electrically Once an access mode is selected the mechanism blocks access...

Page 207: ...nd padlocked Local or remote control Access is released for manual racking Racking the withdrawable circuit breaker manually from test position to service position or from service position to test position Preconditions for operating options High voltage door closed Feeder earthing switch in OPEN position Circuit breaker in OPEN position Panel set to local control Control door open Racking interlo...

Page 208: ...h voltage door closed Control door closed Withdrawable circuit breaker in test position Opening closing the circuit breaker electrically for testing purposes is not interlocked electrically Opening closing the circuit breaker electrically during service Low voltage connector plugged on High voltage door closed Control door closed Withdrawable circuit breaker in service position Opening closing the...

Page 209: ...remote switch to LOCAL position NOTICE Maloperation Electrically racking the withdrawable circuit breaker is only possible when both the high voltage door and the control door are closed If the control door is opened during an electrical racking procedure the motor stops immediately Do not open the control door during an electrical racking procedure Instruction label on control door In addition to...

Page 210: ... padlock pulling the handle Fig 355 Pulling out the withdrawable circuit breaker type 3AE5 removing the padlock pulling the handle The control door is open 23 3 Closing the control door NOTICE Maloperation The panel automatically blocks electrical racking when the control door is open To prevent accidentally blocking access for electrical racking by opening the control door padlock the control doo...

Page 211: ...uit breaker type 3AE5 pulling the handle fitting the padlock The control door is closed 23 4 Selecting manual operation for racking NOTICE Conflicting operation The requirement of setting the panel to either local or remote control prevents operating the panel locally and centrally at the same time For any local operations manual or electrical set the panel to local control for example by switchin...

Page 212: ...ivated Access mode indicator shows M or T Procedure To release the actuating opening for the double bit key lift the operating slide 1 and hold it Insert the double bit key 2 Fig 359 Lifting the operating slide and inserting the key To release manual access to the withdrawable circuit breaker turn the double bit key until the operating mode indicator changes to H To change from M to H turn 90 coun...

Page 213: ...f setting the panel to either local or remote control prevents operating the panel locally and centrally at the same time For any local operations manual or electrical set the panel to local control for example by switching the local remote switch to LOCAL position HINT Electrical racking is only possible when both the high voltage door and the control door are closed After releasing electrical ac...

Page 214: ...y clockwise Remove the double bit key and push the operating slide downwards as far as it will go Close the control door Fit a padlock to the control door and close the padlock Racking the withdrawable circuit breaker is set to electrical operation 23 6 Selecting interlocking NOTICE Conflicting operation The requirement of setting the panel to either local or remote control prevents operating the ...

Page 215: ...ccess mode indicator shows M or double bit key for selecting racking mode inserted and access mode indicator shows H For electromagnetic interlock optional Electromagnetic interlock deactivated Procedure If the access mode indicator shows M and the double bit key is not inserted insert it To release the actuating opening for the double bit key lift the operating slide 1 and hold it Insert the doub...

Page 216: ...se Fig 367 Turning the key 180 counter clockwise Remove the double bit key and push the operating slide downwards as far as it will go Close the control door Fit a padlock to the control door and close the padlock HINT Final procedure steps You may now open the high voltage door and take the withdrawable circuit breaker out of the panel HINT When the control door is closed the access mode indicato...

Page 217: ... is only permissible if the circuit breaker is in OPEN position Check if the circuit breaker is in OPEN position If required switch the circuit breaker to OPEN position before racking NOTICE Maloperation Racking the withdrawable circuit breaker is only permissible if the feeder earthing switch is in OPEN position Check if the feeder earthing switch is in OPEN position If required switch the feeder...

Page 218: ... the control door immediately after closing it Instruction label on high voltage door In addition to these instructions an instruction label on the high voltage door informs about proper handling of the racking crank for moving the withdrawable circuit breaker Fig 368 High voltage door instruction label about operation of racking crank Preconditions Withdrawable circuit breaker in test position Lo...

Page 219: ... racking crank clockwise Remove the racking crank for moving the withdrawable circuit breaker Turn the double bit key clockwise as far as it will go to block manual access and release electrical racking The operating mode indicator changes to M from to Fig 371 Turning the key clockwise Remove the double bit key To close the actuating opening push the operating slide down as far as it will go Close...

Page 220: ...required switch the feeder earthing switch to OPEN position before racking NOTICE Maloperation Electrically racking the withdrawable circuit breaker is only possible when both the high voltage door and the control door are closed If the control door is opened during an electrical racking procedure the motor stops immediately Do not open the control door during an electrical racking procedure NOTIC...

Page 221: ...osition manually NOTICE Conflicting operation The requirement of setting the panel to either local or remote control prevents operating the panel locally and centrally at the same time For any local operations manual or electrical set the panel to local control for example by switching the local remote switch to LOCAL position NOTICE Maloperation Racking the withdrawable circuit breaker is only pe...

Page 222: ...ical racking by opening the control door padlock the control door immediately after closing it Instruction label on high voltage door In addition to these instructions an instruction label on the high voltage door informs about proper handling of the racking crank for moving the withdrawable circuit breaker Fig 372 High voltage door instruction label about operation of racking crank Preconditions ...

Page 223: ...wise Remove the racking crank for moving the withdrawable circuit breaker Depending on the access mode intended turn the double bit key until the operating mode indicator changes to M or to T To release electrical access to the withdrawable circuit breaker change from H to M by turning 90 clockwise To block any access to the withdrawable circuit breaker change from H to T by turning 90 counter clo...

Page 224: ...the padlock The withdrawable circuit breaker has been manually racked from service position to test position HINT Final procedure steps If T is selected you may now open the high voltage door and take the withdrawable circuit breaker out of the panel Otherwise you may now go on to close the circuit breaker electrically for testing purposes ...

Page 225: ...ontrol door during an electrical racking procedure NOTICE Conflicting operation Racking the circuit breaker electrically is possible locally or from a central control The requirement of setting the panel to either local or remote control prevents operating the panel locally and centrally at the same time Depending on the intended operating mode set the panel to either local or remote control for e...

Page 226: ... inspection window 2 Fig 377 Circuit breaker type 3AE1 actuating opening for opening the circuit breaker manually Fig 378 Circuit breaker type 3AE5 actuating opening for opening the circuit breaker manually Fig 379 Circuit breaker type 3AE1 control door Fig 380 Circuit breaker type 3AE5 control door 1 Actuating opening for opening the circuit breaker 2 Inspection window for CLOSED OPEN indicator o...

Page 227: ...by operating the ON pushbutton underneath the high voltage door In contrast to manually opening the circuit breaker closing is only possible when the control door is open However the indicator for the circuit breaker position can still be seen through an inspection window after closing the control door Fig 381 Circuit breaker type 3AE1 actuating opening for closing the circuit breaker manually Fig...

Page 228: ...3 13 Charging discharging the spring energy store manually Charging the spring energy store manually is carried out by inserting a hand crank through an actuating opening in the high voltage door and turning it subsequently Discharging can only be done manually It is carried out by pushing a rod alternately through the actuating openings for opening closing the circuit breaker Charging and dischar...

Page 229: ... at the same time For any local operations manual or electrical set the panel to local control for example by switching the local remote switch to LOCAL position NOTICE Covered control elements For safety reasons some of the actuating openings involved in charging discharging the spring energy store are covered by the control door Open the control door to uncover the actuating openings on the high...

Page 230: ...for the feeder earthing switch position can still be seen through an inspection window after closing the control door Fig 389 Circuit breaker type 3AE1 control elements for feeder earthing switch on high voltage door Fig 390 Circuit breaker type 3AE5 control elements for feeder earthing switch on high voltage door 1 Operating slide for opening and closing the actuating opening for operating the fe...

Page 231: ... switching the local remote switch to LOCAL position NOTICE Covered control elements For safety reasons the actuating opening for earthing de earthing the feeder is covered by the control door Open the control door to uncover the actuating opening on the high voltage door HINT Earthing the feeder is only permissible if the withdrawable circuit breaker is in test position When earthing the feeder i...

Page 232: ...nel locally and centrally at the same time Depending on the intended operating mode set the panel to either local or remote control for example by switching the local remote switch HINT Earthing the feeder is only permissible if the withdrawable circuit breaker is in test position When earthing the feeder in this way the position of the circuit breaker is not significant The feeder may be earthed ...

Page 233: ...emote switch to LOCAL position The procedures for earthing de earthing the busbar system manually in panels with motor operating mechanism control are identical with the procedures in panels without motor operating mechanism control For earthing de earthing the busbar system manually see chapter 17 23 17 Earthing de earthing the busbar system electrically NOTICE Conflicting operation Earthing de e...

Page 234: ...f required open the control door to uncover the control elements on the high voltage door HINT Blocking any racking operation is the precondition for opening the high voltage door Before opening the high voltage door set the access mode indicator to T For any operating options concerning circuit breaker panels with motor operating mechanism control that have not been described in the chapters 23 1...

Page 235: ...0 mA in operating mode 3 Energizing when the command is given Until the motor starts up 180 ms 4 Power consumption of geared motor for racking function 110 V DC Motor starting current approx 6 5 A Continuous motor current while racking approx 1 A Motor power approx 1 2 W Further values on request 5 Motor running time for racking function 65 s 6 Feedback monitoring time for racking valid switching ...

Page 236: ...sm or motor with respect to blocking 1 No feedback of auxiliary switch during command rack withdrawable circuit breaker to test position On Check operating mechanism or motor with respect to blocking 1 No automatic shutdown after end of command On Circuit for automatic shutdown in motor control unit defective High voltage door is open while the withdrawable circuit breaker is being racked On Opera...

Page 237: ...0 10 230 to 240 Temperature control in the panel is done via a mechanical temperature controller or via an electronic temperature and humidity controller 24 2 Mechanical temperature controller NOTICE Damage due to incorrect application The temperature controllers require direct connection to the ambient air Do not cover the ventilation slots of the temperature controllers The mechanical temperatur...

Page 238: ...for heater operation is opened LED does not light up Humidity function If the relative humidity rises above the adjusted value the circuit for heater operation is closed LED lights up If the relative humidity falls below the adjusted value the circuit for heater operation is opened LED does not light up Fig 395 Electronic temperature and humidity controller 24 4 Applications for temperature contro...

Page 239: ...operation of the switchgear the integrated temperature and humidity controllers must be adjusted to the local temperature and or humidity conditions in the application area of the switchgear panels by the respective operator Installation in the panel The temperature and humidity controllers are installed top left inside the switching device compartment directly at the side of the vertical wiring d...

Page 240: ...must be observed For questions about maintenance measures please contact your regional Siemens representative 25 2 Time schedule for maintenance measures Besides the recommended maintenance intervals additional maintenance measures may be required for operational reasons Recommended time schedule for maintenance measures Measure Interval Operational fact Visual inspection Every year or at the oper...

Page 241: ...pressure relief duct Fig 398 View from above onto a ventilation unit in the pressure relief duct Fig 399 Exemplary view of a ventilated panel with ventilation slots in the high voltage door General check for humidity To do this open the high voltage door of the switching device compartment of every third panel and check the switching device compartment for humidity or condensation If there is humi...

Page 242: ...ects Serious switchgear damage and malfunctioning due to flashovers caused by foreign objects Remove all foreign objects from the switchgear e g tools cleaning cloths or lubricants NOTICE Damage due to removal of greasing Some parts and surfaces of the switchgear are greased for functioning Do not remove the grease from greased parts and surfaces Do not clean greased parts and surfaces If greased ...

Page 243: ...ator s discretion if there is a lot of dust or if the air is extremely humid and or polluted Following the results of the visual inspection grease the following Guide rails and shutter guiding linkage Fixed contacts of the earthing switch Fixed contacts of the bushings Apply WD 40 waterproof spray oil to a cleaning cloth and clean the shutter guiding linkage therewith Independently of the regular ...

Page 244: ...r Shutter guiding linkage 1 WD 40 waterproof spray oil Hardware store Guide rails 2 ISOFLEX TOPAS L 32 Order No 3AX1133 3E 1 kg www klueber com Fixed contacts of feeder earthing switch 3 MOLYKOTE LONGTERM 2 PLUS EXTREME PRESSURE BEARING GREASE Order No 8BX1022 1 kg www dowcorning com Main fixed contacts of bushings 4 Fig 400 Circuit breaker disconnecting and metering panels Fig 401 Circuit breaker...

Page 245: ... uninterrupted communication with the operator at the central control Always perform the function test on one overpressure monitor only and complete it Test several overpressure monitors one after the other Test unit To perform the function test of the overpressure monitors a test unit is available as an accessory The test unit enables the function test of every single overpressure monitor Fig 402...

Page 246: ...ing 8 at opposite points towards the tube connector and at the same time pull the tube to the compartment out of the tube connector in opposite direction Fig 404 Detail view of tube connector Instead of the tube to the compartment insert the tube of the test unit 2 into the tube connector as far as it will go Fig 405 Detail view of connection of test tube 5 Overpressure monitor 6 Tube connector 7 ...

Page 247: ...ion test of the other overpressure monitors in the same way After the function test of all overpressure monitors close the door to the low voltage compartment The function test of the overpressure monitor is completed Overpressure monitor does not trip in the indication range from 8 to 12 Document the tripping value and repeat the test If this overpressure monitor does not trip in the indication r...

Page 248: ...sposal NXAIR M switchgear is an environmentally compatible product The panels are made of galvanized sheet metal The doors and lateral switchgear end walls are powder coated with resistant epoxy resin material The switchgear materials should be recycled as far as possible The switchgear can be disposed of in an environmentally compatible manner in compliance with existing legislation The component...

Page 249: ...voltage door cannot be opened Withdrawable part is in service position Rack the withdrawable part to test position Withdrawable part Fault Cause Remedy Actuating opening cannot be opened withdrawable part cannot be moved to service position Operating lever is inserted in the manual CLOSE OPEN operating mechanism of the feeder earthing switch Remove the operating lever Operating slide for opening t...

Page 250: ... lever cannot be inserted Withdrawable part in service position Rack the withdrawable part to test position switch the circuit breaker to OPEN position if required Circuit breaker Fault Cause Remedy Circuit breaker cannot be closed Racking crank for moving the withdrawable part is inserted Remove the racking crank for moving the withdrawable part Withdrawable part is in intermediate position Rack ...

Page 251: ...the rear 191 installing the partition 167 installing the rear wall 194 Connection duct accessing through the rear 197 installing the rear wall 200 Control door of motor operating mechanism control closing 224 opening 223 Customer support 28 D Danger 3 Design panel 18 Dimensions panels 14 switchgear room 14 Disconnecting panel operating 73 Disposal switchgear 262 Double busbar system operating 113 ...

Page 252: ...ugging on 135 removing 127 withdrawable circuit breaker coding 65 95 plugging on 57 removing 56 withdrawable circuit breaker fuse combination coding 95 plugging on 86 withdrawable disconnector link removing and plugging on 76 withdrawable metering part removing and plugging on 78 LRM system overview 140 Lubricants 258 M Maintenance preventive 256 Maintenance general 254 Metering panel operating 77...

Page 253: ...reaker manually service position 35 231 test position 37 235 withdrawable disconnector link 74 withdrawable metering part 78 Rating plates 13 Rear wall installing 194 200 Rear wall removing 191 197 Removable voltage transformers operating 118 Repairs 28 Replacement of fuse links removable voltage transformers 136 Replacement of panels and components 262 Replacing fuse links circuit breaker panel w...

Page 254: ...Index 254 NXAIR M 139 2021 9 07 Voltage transformer compartment inserting 186 removing 182 W Warning 3 ...

Page 255: ...Imprint Siemens AG Energy Management Medium Voltage Systems Switchgear Factory Frankfurt Carl Benz Str 22 D 60386 Frankfurt Siemens AG 2018 ...

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