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Maintenance

9229 9862 176 0D

2013-08-28

Interrupter service life

If switching operations occur frequently under overload or short circuit, the service
life of the vacuum interrupters may be reached prematurely.

Replace the interrupters after reaching the maximum permitted operating cycle
number of 30,000 mechanical or electrical load setting changes (up to the rated cur-
rent).

When ordering vacuum interrupters, please always state the circuit-breaker type
and serial number (see“Rating plate” on page 33).

Accessories and spare parts

Replacing spare parts

To ensure that the device operates reliably, spare parts must be replaced only by
trained and certified personnel.

Fig. 71

Accessories available for order

Always specify the vacuum circuit-breaker's type and serial no. (see “Rating plate”
on page 33) when ordering spare parts.

CAUTION

Risk of injury!

The vacuum circuit-breaker should be taken out of the switch cabinet or switch-
gear for servicing.

Separate vacuum circuit-breakers from the control feed voltage or switch it off
and release low-voltage plug or clip connection.

Accessory/spare part

Order no.

Comments

Operating instructions

9229 9862 100

Hand crank

3AX1530-2B

Lubricant

see “Maintenance plan” on
page 54, note 3)

Vaseline (contact grease)
e. g. Atlantic white, Atlantic Mineralölwerk GmbH

Pasty consistency, flame point
210 °C, low acid

Содержание 3AH4

Страница 1: ... Siemens AG 1996 All rights reserved 3AH4 Vacuum circuit breaker 3AH41 3AH42 and 3AH43 OPERATING INSTRUCTIONS Order no 9229 9862 176 0D Ordering location IC LMV LP PO P C41 AG 08 2013 en ...

Страница 2: ... and tag circuits and equipment in accordance with established safety practices training in the proper care and use of protective equipment in accordance with established safety practices training in providing first aid Product liability DANGER signal word used to indicate an imminently hazardous situation which if not avoided will result in death or serious injury WARNING signal word used to indi...

Страница 3: ...43 Attachment in the switching cubicle 43 Earthing 45 Electrical connection of the prime conductor 46 Operation 49 Commissioning 49 First closing operation 50 Closing 51 Opening 51 Maintenance 53 Maintenance and servicing 53 Maintenance plan 54 Interrupter service life 58 Accessories and spare parts 58 Manufacturer s product liability 59 Disposal 59 Service 59 Index of keywords 61 Legend for all p...

Страница 4: ...4 9229 9862 176 0D 2013 08 28 Blank page ...

Страница 5: ...with crane or fork lift WARNING Heavy transport weight Transport unit may fall and fail and sling gear may break Use lifting gear transporting and sling gear suited to the requirements and load carrying capacity Observe transport symbols Note Observe stacking height For transport no more than three constructionally identical transport units must be piled on top of each other Observe the loads spec...

Страница 6: ...ng gear Pliers or lever Opening the transport unit Place the transport unit on a level non slip and pressure resistant surface Remove lifting gear or transport means Remove plastic wrap Lever out fasteners from the carton and lift off carton CAUTION Risk of injury from sharp edges Fasteners may break leaving sharp edges Always use a suitable tool to lever out fasteners Note Do not cut open or dama...

Страница 7: ...rton The vacuum circuit breaker can be transported with the pallet without the carton Thread carrying straps under the pallet or transport with fork lift Note Do not use the vacuum circuit breaker if parts are broken i e if you find cracks flaking bent metal parts damaged plug in contacts tears or bare cables Send it back in its original transport unit see Reusing the transport unit page 13 Note C...

Страница 8: ... lift vacuum circuit breaker off the pallet just enough that pieces of square timber can be placed underneath Note When fastening the eyebolts to the pole heads ensure that the contact surfaces are not damaged Fig 6 Removing the tensioning belts Fig 7 Screwing in eyebolts and lifting the vacuum circuit breaker Note Place pieces of square timber onto the pallet in such a way that the insulating ope...

Страница 9: ...eaker down onto the square timbers Hang further sling gear into the transport boreholes Transport to installation site or leave suspended from crane for further work steps Fig 8 Positioning the square timbers and setting down the vacuum circuit breaker Fig 9 Transporting without pallet ...

Страница 10: ... resistant surface Remove lifting gear or transport means Unscrew all the screws from the cover and lift it off Take out the partitions and check for damage Note Do not use the vacuum circuit breaker if parts are broken i e if you find cracks flaking bent metal parts damaged plug in contacts tears or bare cables Send it back in its original transport unit see Reusing the transport unit page 13 Fig...

Страница 11: ...supports out of the transport unit Remove the side walls Remove the accessories and check for damage Remove film Check the vacuum circuit breaker 3AH4 for damage Undo tensioning belts if applicable Fig 12 Removing the supports Fig 13 Removing the side walls Fig 14 Removing the accessories Fig 15 Removing the film ...

Страница 12: ...rt screws and into the openings on the mech anism box Observe crane hook symbols Vertically lift out vacuum circuit breaker CAUTION Crushing hazard Hands may get crushed when lifting out the vacuum circuit breaker Do not reach between the transport box and the vacuum circuit breaker Fig 16 Preparing for lifting out Fig 17 Lifting out ...

Страница 13: ... Storage Note Store the vacuum circuit breaker in the following condition OPEN switching position Closing spring discharged Note Risk of corrosion damage if stored improperly If the storage conditions listed below are met the vacuum circuit breaker can be stored for up to a year in its transport unit If the storage conditions are not met the vacuum circuit breaker cannot be stored in the transport...

Страница 14: ...Transport storage and packing 14 9229 9862 176 0D 2013 08 28 Blank page ...

Страница 15: ...rate in continuous periodic and short term oper ation WARNING Dangerous voltage and mechanical movements When operating electrical devices certain parts will always be live and mechanical parts may move very quickly even when remotely controlled If the warnings are not observed serious injury or damage to material may be the result Only personnel with the relevant qualifications may work on or in ...

Страница 16: ...ers installed in the vacuum circuit breakers are of a design approved under the X Ray Ordinance RöV of the Federal Republic of Germany They meet the requirements of RöV of 8 January 1987 BGbl I page 114 8 and Annex II No 5 up to the level of the rated voltage stipulated according to DIN VDE IEC Scope of delivery Delivery includes Vacuum circuit breaker 3AH4 Hand crank for circuit breaker 3AX 1530 ...

Страница 17: ...inforcing struts 28 and the insulating operating rods 48 with contact pressure springs 49 required for contact actuation Each of the 3 pole assemblies 19 is carried by the cast resin post insulators 16 1 and 16 2 that are screwed to the pole plate 15 Fig 18 Side view 15 Pole plate 16 1 Upper post insulator 16 2 Lower post insulator 19 Pole assembly complete 28 Strut 30 Interrupter 48 Insulating op...

Страница 18: ...and the struts 28 relieve the vacuum interrupters of external forces Contact system in the interrupters A slight change in the contact stroke that occurs over the entire useful life of the interrupter has no effect on the function of the vacuum circuit breaker There is no need for a status indicator for the contact system Fig 19 Pole assembly I Fig 20 Pole assembly II 19 Pole assembly 29 1 Flexibl...

Страница 19: ...pring can be charged with a hand crank 50 There is an opening 50 1 for this in the cover behind which you will find the hand crank coupling 50 5 of the gear unit 50 2 Indicators The charged state of the springs is indicated via the spring state indicator 55 The position indicator 59 shows the CLOSED or OPEN state The operating cycle counter 58 indicates the number of operating cycles An operating ...

Страница 20: ... 1 Closing solenoid Y9 66 Closing damper 54 1 Shunt release Y1 68 Auxiliary switch S1 54 2 Shunt release Y2 68 1 Operating rod for auxiliary switch S1 54 3 Transformer operated release Y4 68 7 Low voltage interface X0 54 4 Undervoltage release Y7 69 Contactor relay K1 54 5 Transformer operated release 0 1 Ws Y6 70 Earth terminal 55 Spring state indicator 71 Heater condensation water protection 58 ...

Страница 21: ...K1 Closing solenoid Y9 Shunt release Y1 Auxiliary switch optional S1 6NO 6NC 12NO 12NC Position switch for signal Closing spring charged S41 S42 Circuit breaker tripping signal cut out switch S6 S7 Low voltage interface optional X0 Plug connector with sleeve housing 64 pole Plug connector with sleeve housing 24 pole Terminal strip X1 Operating cycle counter Mechanical anti pumping device Mechanica...

Страница 22: ...arging time the motor temporarily oper ates in the overload range See Fig 24 for the rated cur rent for the required motor short circuit protection Note The motor protection devices are not included in the delivery of the vacuum circuit breaker and must be ordered separately Fig 23 Motor 50 4 Rated supply voltage U V DC 24 DC 48 DC 60 DC 110 AC 50 60 Hz 110 DC 220 AC 50 60 Hz 230 Recommended rated...

Страница 23: ... against overvoltage Power consumption is approximately 140 W VA Fig 26 Closing solenoid 53 1 In the case of the 1st shunt release Y1 the electrically fed tripping pulse is passed to the OPEN latch by means of a directly acting magnet armature thus switching off the vacuum circuit breaker The 1st shunt release Y1 is not designed for continuous operation and is automatically deactivated within the ...

Страница 24: ...le for delivery with 6 or 12 NO NC contacts each Rated insulation voltage 250 V AC DC Insulation group C as per VDE 0110 Continuous current 10 A Closing capacity 50 A Fig 28 Auxiliary switch 68 AC 40 to 60 Hz DC Operating voltage Operating current Operating voltage Operating current U V I A U V I A Ohmic load Inductive load T 20 ms Up to 230 10 24 10 10 48 10 9 60 9 7 110 5 4 220 2 5 2 ...

Страница 25: ...en closing spring is charged S41 S42 Position switches report charging state Fig 30 Position switch 50 4 1 The position switch S6 makes contact briefly when the vacuum circuit breaker is opened by means of an electrical release This contacting can be used for a signal In the event of intentional mechanical opening the cut out switch S7 interrupts the contacting Fig 31 Circuit breaker tripping sign...

Страница 26: ...4 pole plug 68 7 1 for the external terminal is suitable for crimp termination of control lines with a nominal cross section of 1 5 mm2 Terminal strip optional Instead of the 64 pole plug 68 7 1 a terminal strip 68 7 2 can be ordered as inter face to the terminal at the customer s site Assignment of the terminals is done according to the circuit diagram supplied Fig 32 Low voltage interface X0 Fig...

Страница 27: ...uous operation Any necessary varistors and rectifiers are integrated in the release Power consumption is approximately 60 W VA Fig 34 2 Shunt release 54 2 The transformer operated releases Y4 Y5 or Y6 consist of an energy storage mechanism an unlatching fixture and an electromagnetic system If the tripping current is exceeded 90 of the transformer operated release s rated current the energy storag...

Страница 28: ...hod is used the solenoid coil s short circuit current is limited by the built in resistor The undervoltage release Y7 can also be connected to voltage transformers The undervoltage release Y7 automatically trips the vacuum circuit breaker if the rated supply voltage drops to an inadmissible value Any necessary varistors and rectifiers are integrated in the release Power consumption 6 5 W or 7 5 VA...

Страница 29: ... via a command element from the control room With on site closing this permits taking into account system related interlocking and allows you to prevent unintentional closing by the control room for example This allows for interlocking the vacuum circuit breaker module for example via the auxiliary contact of a disconnector Vacuum circuit breakers with electrical manual closing cannot be switched ...

Страница 30: ...attained fully Operating position The circuit breaker is inserted fully into the switchgear and the vacuum circuit breaker contacts overlap completely with the switchgear counter contacts Mechanical locking device optional with spring drive mechanism A sensing and actuation component on the system side detects the operating position CLOSED OPEN of the vacuum circuit breaker CLOSED switching positi...

Страница 31: ...harge release is brought into operating position b opening is reliably done via the mechanics of the vacuum circuit breakers and the closing latch is cancelled A no load switching operation is done in the course of this Only now is it possible to undo the plug of the low voltage interface a b a Idle position CLOSED switching position b Operating position OPEN switching position 68 7 Low voltage in...

Страница 32: ...iably prevented as well Spring dump position In the second position spring dump position c the vacuum circuit breaker remains in open condition In addition when actuating the locking device in the second position the closing spring is discharged by a no load switching operation The closing and the opening springs are now discharged and hence all of the energy storages of the vacuum circuit breaker...

Страница 33: ...on to standard Rated voltage Ur kV 12 15 17 5 24 36 Rated operating cur rent Ir A 1250 2000 1250 1600 2000 2500 3150 1250 2000 1250 1600 2000 2500 3150 1250 2000 1250 1600 2000 2500 3150 1250 2000 2500 1250 2000 1250 2000 2500 3150 4000 2500 3150 4000 Rated lightning impulse withstand voltage peak value Up kV 75 95 95 125 150 170 Rated power frequency withstand voltage effective value Ud kV 28 36 ...

Страница 34: ...ically active substances 3S24 1 Peak value of the 24 hour means 35 C 2 Without ice formation and wind driven precipitation 3 Without occurrence of salt fog and simultaneous condensation 4 Restriction clean insulating parts 5 Average value measured over 24 hours 6 Average value measured over 1 month Fig 44 Ambient conditions U U0 Ka U Rated withstand voltage U under standard reference atmosphere U0...

Страница 35: ...e first pole during closing and the time when contact touch has been cancelled in all poles during subsequent opening Dead time period from the end of the current flow in all poles up to the start of current flow in the first pole Closing time 75 ms Opening time 1 shunt release Y1 60 ms 2 and 3rd release Y2 Y4 Y6 Y7 55 ms Arcing time 15 ms Break time 1 shunt release Y1 75 ms 2 and 3rd release Y2 Y...

Страница 36: ...see 42 or can be taken from the relevant dimension drawing Circuit diagrams The circuit diagrams show all the available components with their wiring options Fig 47 to Fig 53 show some non binding examples of vacuum circuit breakers The circuit diagrams for the vacuum circuit breaker are compiled depending on your order Mechanical manual closing and electrical closing Fig 47 Example circuit diagram...

Страница 37: ...age mechanism R1 Resistor S1 Auxiliary switch S10 S11 Position switch mechanical anti pumping device S12 Position switch prevents electrical closing if there is a mechanical locking device S21 S22 Position switches switch off the motor after charging S3 Position switch opens when closing spring is charged S41 S42 Position switches signal charging status S6 S7 Position switches for circuit breaker ...

Страница 38: ...sw as per EN 50525 2 31 when motors are used with DC 24 V 48 V and 60 V 4 Only if a mechanical closing lock is ordered at the same time a Motor winding for DC b Motor winding with rectifier for AC c Closing d Closing with anti pumping device Fig 49 Sample circuit diagram 64 pole part 1 of the vacuum circuit breaker a b c d ...

Страница 39: ...ier for AC DC 100 V a 1st shunt release with 64 pole plug connector b 1st shunt release with 24 pole plug connector c 2nd shunt release with 64 pole plug connector d 2nd shunt release with 24 pole plug connector Fig 50 Sample circuit diagram part 2 of the vacuum circuit breaker a b c d ...

Страница 40: ... direct current DC a Undervoltage release b Low energy trip coil c 1st transformer operated release d Signal spring state with 64 pole plug connector e Signal spring state with 24 pole plug connector f Breaker tripping signal for 64 pole plug connector Fig 51 Sample circuit diagram part 3 of the vacuum circuit breaker a b c d e f ...

Страница 41: ... auxiliary switch terminals Fig 53 Sample switching operation for connection of the undervoltage release Y7 Normal auxiliary switch Extended auxiliary switch No wiring required if a 2nd shunt release Y2 available b Undervoltage release Y7 available a b System wiring Tripping via NO con tact Tripping via NC contact System wiring Circuit breaker wiring ...

Страница 42: ...Description 42 9229 9862 176 0D 2013 08 28 Blank page ...

Страница 43: ... parts causes an electric shock Do not touch live parts When performing work on the switchgear de energise it and earth it The work described in the following sections must only be performed when the switchgear has been de energised Take safety measures to prevent reclosing Observe industrial safety regulations Ensure that the vacuum circuit breaker is installed and commissioned only by qualified ...

Страница 44: ...e various types of installation Use M12 screws strength class 8 8 for fastening The binding dimension draw ings are relevant The framework must be made to suit the operating conditions and have sufficient load bearing capacity and stability bores for M12 screws Fig 55 Example of mounted partitions Fig 56 Fastening options Fig 57 View Y and Z 9862 26 15 9862 27 60 Y Z ...

Страница 45: ... and washer on the earth terminal 70 with 40 Nm Connect low voltage Connect the low voltage connecting cables in the customer s switch cabinet in such a way that safe operation as per supplied circuit diagram is guaranteed Note If the 3AH4 vacuum circuit breaker is installed into an earthed metal frame and is connected permanently and electrically conductive no separate earthing is required Place ...

Страница 46: ...ism box 60 of the vacuum circuit breaker Replace the cover 60 1 in the reverse order and fasten the screws 60 2 with a tightening torque of 10 Nm Electrical connection of the prime conductor The busbars can be purchased from the Siemens Service Center Busbar connection Adjust the busbars in such a way that before fastening they lie flat easily and fit the holes on the contact areas of the vacuum c...

Страница 47: ...lightly grease the bright contact areas with acid free Vaseline e g Shell Vaseline 8420 and screw together immediately Fig 62 Cleaning the contact areas Fig 63 Cleaning the contact areas of the busbars Note Clean silver spray plated and copper spray plated contact areas with a cloth do not brush Different connection materials AI CU must not be cleaned with the same clean ing tools Silver plated pa...

Страница 48: ...connection of the busbars and use the appropriate spring elements and washers When tightening the screws hold the nuts against tightening torque of 70 Nm with a suitable screwdriver or socket wrench Screw in depths in the upper and lower terminals See dimension drawings Fig 64 Installing busbars flat Fig 65 Installing busbars flat ...

Страница 49: ...rip plug connection for tightness Check functioning of the auxiliary switches If necessary check and adjust customer s devices If there is an undervoltage release Y7 3AX1103 has the locking screw of the striker been shifted from position A to B see Removing the trans port securing device from the undervoltage release on page 46 Test switching without supply voltage Charge the closing spring 62 wit...

Страница 50: ...state indicator 55 changes over WARNING Do not commission the vacuum circuit breaker if there are malfunctions If the malfunctions or the damage cannot be remedied contact a sales represent ative or Siemens Service and if necessary send back the vacuum circuit breaker WARNING Risk of injury if hand cranks other than the original hand crank are used When the supply voltage is present the motor imme...

Страница 51: ...nge of the spring state indicator 55 Opening The opening spring 64 is charged during the closing operation To open send the opening command via the OPEN pushbutton 54 or the corre sponding command element until the vacuum circuit breaker is open and shows and signals the OPEN switching position Change of the switching position indicator 59 after electrical opening The spring state indicator 55 doe...

Страница 52: ...Operation 52 9229 9862 176 0D 2013 08 28 Blank page ...

Страница 53: ...an DANGER High voltage danger to life Touching live parts is fatal or causes serious physical injury Before beginning maintenance work note the five safety rules for high voltage equipment specified in EN 50110 1 namely Isolate from the power supply Secure against reclosing Verify safe isolation from the power supply Earth and short circuit Cover or cordon off neighbouring live parts On the vacuum...

Страница 54: ...easing Isoflex Topas L32 Shell Tellus Oil 32 x See Fig 70 and Fig 69 Note 2 3 6 1 3 Check all electrical operating materi als in the drive for correct functioning x 1 4 Check line connections for tight seat x 1 5 Check all screw connections and locking elements for tight fit and check for completeness x 2 Pole assembly 2 1 Exchange vacuum interrupters x Possibly depending on the electrical operati...

Страница 55: ...o work 3 Lubricant No Work to be done Operating and auxil iary materials Frequency Remarks annually every 10 000 every 30 000 after 60 000 mechanical operating cycles 3 Operating mechanism 3 1 Exchange motor M1 x Note 4 3 2 Exchange closing spring x Note 4 3 3 Replace closing solenoid Y9 x Note 4 3 4 Replace opening solenoid Y1 x Note 4 3 5 Replace opening solenoid Y2 x If available Note 4 3 6 Rep...

Страница 56: ...witches must only be fastened so tight that the tappet is easily moved 6 Grease all bearing parts and sliding surfaces on the pole side see Fig 69 Fig 69 Bearings and sliding surfaces of the pole side Order no 180 g Klüber Isoflex Topas L32 3AX11 33 3H 1 kg SHELL Tellus Oil 32 special oil 3AX11 33 2D 1 kg Klüber Isoflex Topas L32 3AX11 33 3E Isoflex Topas L 32 t Bolts of the angle lever u Bolts an...

Страница 57: ...ing device actuation b Bearing for deflection lever c Curve contour f Auxiliary switch d Close latch j Circuit breaker shaft bearing e Deflection of auxiliary switch p Opening spring bearing g Opening spring guide r Spring eyelet on closing spring h Deflection of auxiliary switch k OPEN latch l Curve for OPEN latch m End stop s Contact area of instantaneous release ...

Страница 58: ...t the device operates reliably spare parts must be replaced only by trained and certified personnel Fig 71 Accessories available for order Always specify the vacuum circuit breaker s type and serial no see Rating plate on page 33 when ordering spare parts CAUTION Risk of injury The vacuum circuit breaker should be taken out of the switch cabinet or switch gear for servicing Separate vacuum circuit...

Страница 59: ...nit as thoroughly as possible into sorted scrap and residual mixed scrap Electronics Electronic scrap must be disposed of in accordance with applicable regulations Materials The vacuum circuit breaker consists of the following materials Steel partly phosphatised galvanised and yellow chromated Copper partly silver plated Plastics epoxy resin polyamide polyester polycarbonate ABS PC mixture partly ...

Страница 60: ...Maintenance 60 9229 9862 176 0D 2013 08 28 Blank page ...

Страница 61: ...nterrupter vacuum check 58 L Locking devices 30 Low voltage interface 20 21 M Mechanical anti pumping device 21 Mechanical locking device 21 30 Mechanical manual closing 21 29 Mechanical manual opening 21 Mechanism box 17 20 Motor 20 22 Motor short circuit protection 22 Mounting position 43 O Opening spring 20 Operating cycle counter 20 21 Operating position 30 Operating rod 20 P Plug connector wi...

Страница 62: ...Index of keywords 62 9229 9862 176 0D 2013 08 28 Blank page ...

Страница 63: ...utton 54 1 Shunt release Y1 54 2 Shunt release Y2 54 3 Transformer operated release Y4 54 4 Undervoltage release Y7 54 5 Transformer operated release 0 1 Ws Y6 55 Spring state indicator 55 1 Opening for spring state indicator 58 Operating cycle counter 58 1 Opening for operating cycle counter 59 Position indicator CLOSED OPEN 59 1 Opening for position indicator CLOSED OPEN 60 Mechanism box 60 1 Co...

Страница 64: ...Published by Siemens AG Infrastructure Cities Sector Low and Medium Voltage Division Medium Voltage Systems Schaltwerk Berlin Nonnendammallee 104 13629 Berlin ...

Страница 65: ...ouse hold cleaners x Note 1 1 2 Grease all bearing points and sliding surfaces as per Fig 70 and Fig 69 Perform 3 to 5 mechanical test switching operations after greasing Isoflex Topas L32 Shell Tellus Oil32 x See Fig 70 und Fig 69 Note 2 3 6 1 3 Check all electrical operating materials in the drive for correct functioning and replacing just in case x 1 4 Check line connections for tight seat x 1 ...

Страница 66: ...lable Note 4 3 7 Exchange auxiliary switch S1 x 3 8 Exchange position switches S3 to S42 x Note 4 5 3 9 Exchange closing block including gearbox x Only for 3AH4305 6 7 8 and 3AH4306 6 7 8 Note 4 3 10 Exchange opening block x Only for 3AH4305 6 7 8 und 3AH4306 6 7 8 Note 4 3 11 Exchange bearing block reinforcing plate and fixing screws x Only for 3AH41 42 Z M60 Note 4 Mechanical operating cycles ML...

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