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Siemens 3AH37, Operating Instructions Manual, Page: 21 / 64

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Description

9229 9992 176 0D

21

2013-07-08

Mechanism box

The mechanism box (60.) contains all the electrical and mechanical components
required to switch the vacuum circuit-breaker on or off. Insulating operating rods
(48.) transfer the switching movement to the pole assemblies.

The mechanism box is closed with a removable cover (60.1).

There are openings in the cover (60.1) for the operating and indicator elements.

Functions

The CLOSE pushbutton (53.) is used to close the vacuum circuit-breaker. The motor
(50.4) immediately charges the closing spring (62.). If the supply voltage for the
motor fails, the closing spring 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 cycle consists
of one closing and one opening. The rating plate (51.) is attached to the mechanism
box and readable through an opening (51.1) in the cover.

Fig. 25

Operating and indicator elements

50.1

Opening for hand crank

58.

Operating cycle counter

51.

Ratinng plate

59.

Position indicator CLOSED-OPEN

53.

CLOSE pushbutton

60.1

Cover

54.

OPEN pushbutton

a)

Tightening torque Md = 10 Nm

55.

Spring state indicator

Summary of Contents for 3AH37

Page 1: ...37 38 Vacuum circuit breaker 12 kV 90 kA as per IEC 62271 100 17 5 kV 50 63 72 80 kA as per IEEE C37 013 24 kV 50 63 72 kA as per IEEE C37 013 OPERATING INSTRUCTIONS Order no 9229 9992 176 0D Ordering location IC LMV LP PO P C41 AG 07 2013 en ...

Page 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 indic...

Page 3: ...prime conductor 47 Operation 51 Commissioning 51 First closing operation 52 Closing 53 Opening 53 Maintenance 55 Maintenance and servicing 55 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 pages 63 Note Sections with Addendum I II or III Sections with Addendum I refer to vacuum circuit breake...

Page 4: ...4 9229 9992 176 0D 2013 07 08 Blank page ...

Page 5: ...ng 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 heightFor transport not more than three constructionally identical transport units must be piled on top of each other Observe loads speci...

Page 6: ...Knife scissors Lifting equipment with lifting gear Pliers or lever Note Some of the images in this section show a different circuit breaker type These images are exemplary and also apply to the vacuum circuit breaker 3AH37 38 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 damage the carton si...

Page 7: ...emoving the carton Note Do not use the vacuum circuit breaker if parts are broken i e if you find cracks flakings 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 16 Note Carrying straps may scrape along the vacuum circuit breaker and damage it If necessary cover carrying straps with edge protection Selec...

Page 8: ...et floor Check delivery for completeness Check vacuum circuit breaker for damage If the vacuum circuit breaker is damaged ship it back in the transport unit see Reusing the transport unit on page 16 Transporting with pallet without carton The vacuum circuit breaker can be transported with the pallet without the carton Thread carrying straps under the pallet or Transporting with fork lift Fig 4 Rem...

Page 9: ...y 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 eye bolts and lifting the vacuum circuit breaker Note Place pieces of square timber onto the pallet in such a way that the insulating o...

Page 10: ...s 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 Note Keep partitions and accessory pack ready for the installation ...

Page 11: ...e scissors Screwdriver Open end wrench Lifting equipment with lifting gear Transporting with brackets Remove partitions and accessory pack and store safely in the packaging for later attachment Attach suitable bolt in the middle pole head Attach sling gear to bolt and to transport boreholes Fig 10 Removing partitions and foil Fig 11 Lifting the vacuum circuit breaker ...

Page 12: ... pallet Lift the vacuum circuit breaker from the pallet Remove all screw connections from the brackets on the pole plate and the terminals Remove angle plate below mechanism box Transport to installation site or leave suspended from crane for further work steps Fig 12 Removing screws from the pallet Fig 13 Removing the angle plate and brackets Note Keep partitions and accessory pack ready for the ...

Page 13: ...s from the cover and lift it off Take out the partitions and check for damage Note Some of the images in this section show a different circuit breaker type These images are exemplary and also apply to the vacuum circuit breaker 3AH37 38 Note Do not use the vacuum circuit breaker if parts are broken i e if you find cracks flakings bent metal parts damaged plug in contacts tears or bare cables Send ...

Page 14: ...ransport unit Remove the side walls Remove accessory pack and store safely in the packaging for later attachment Remove foil Check the vacuum circuit breaker 3AH37 38 for damage Undo tensioning belts if applicable Fig 16 Removing the supports Fig 17 Removing the side walls Fig 18 Taking out the accessory pack Fig 19 Removing the foil ...

Page 15: ... the mechanism 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 20 Preparing for lifting out Fig 21 Lifting out Note Keep partitions and accessory pack ready for the installation ...

Page 16: ...4 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 transpor...

Page 17: ...tor consumers Suitable for high frequency of operation and unlimited on time 3AH37 38 vacuum circuit breakers operate in continuous periodic and short time operation 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 i...

Page 18: ...talled 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 3AH37 38 Hand crank for circuit breaker 3AX 1530 2B ...

Page 19: ...nforcing 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 22 Side view 15 Pole plate 16 1 Upper post insulator 16 2 Lower post insulator 19 Pole assembly complete 28 Strut 30 Vacuum interrupter 48 Insulat...

Page 20: ... 28 1 and the struts 28 relieve the interrupters of external forces Contact system in the vacuum interrupters A slight change in the contact stroke that occurs over the entire useful life of the vacuum circuit breaker has no effect on its function There is no need for a status indicator for the contact system Fig 23 Pole assembly I Fig 24 Pole assembly II or III 19 Pole assembly 29 1 Flexible conn...

Page 21: ...ring 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 c...

Page 22: ... 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 ...

Page 23: ...l anti pumping device 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 pin Plug connector with sleeve housing 24 pin Terminal strip X1 Operating cycle counter Mechanical anti pump...

Page 24: ... charging time the motor sometimes operates in the overload range See Fig 28 for the rated current 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 27 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 ...

Page 25: ...ed against overvoltage Power consumption is approximately 140 W VA Fig 30 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 th...

Page 26: ...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 32 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 ...

Page 27: ...en closing spring is charged S41 S42 Position switches report charging state Fig 34 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 35 Circuit breaker tripping sign...

Page 28: ...4 pin 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 pin plug 68 7 1 a terminal strip 68 7 2 can be ordered as interface to the terminal at the customer s site Assignment of the terminals is done according to the circuit diagram supplied Fig 36 Low voltage interface X0 Fig 37...

Page 29: ...tinuous operation Any necessary varistors and rectifiers are integrated in the release Power consumption is approximately 60 W VA Fig 38 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 stored ene...

Page 30: ... 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 Note The undervoltage release Y7 mus...

Page 31: ...and 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 mechanicall...

Page 32: ... inserted fully into the switchgear and the vacuum circuit breaker contacts overlap completely with the switchgear counter contacts Mechanical interlock optional with spring drive mechanism An interrogation and actuation component b on the system side scans the operating position CLOSED OPEN of the vacuum circuit breaker CLOSED position If the vacuum circuit breaker is closed actuation of the syst...

Page 33: ...mechanisms of the vacuum circuit breaker can be equipped with priority opening This is also the case for vacuum circuit breakers on switch gear trucks in withdrawable sections or with disconnectors As long as the OPEN pushbutton is actuated closing with the CLOSE pushbutton is mechanically locked ...

Page 34: ...cation to standard Q 600806 Kontr Made in Germany Classification to IEEE C37 013 IEC 62271 100 E2 M2 C2 Rated operating sequence CO 30 min CO Type 3AH3818 8 No S 3AH3 90004711 Ur 17 5 kV 50 60 Hz Ud Up 50 110 Isc 63 kA kV Year of manufact 2006 Ir 4000 A tk 3 s m 320 kg 9992 16_en r p o n m k i b a c d e f g h Rated voltage Ur kV 17 5 24 Rated operating current Ir A 3150 4000 5000 6300 Rated lightn...

Page 35: ...sed at the factory If one of the vacuum circuit breakers is exchanged the three vacuum circuit breakers must be re synchronised Rated voltage Ur kV 12 17 5 24 Rated operating current Ir A 4000 4000 5000 6300 8000 10000 12000 4000 5000 6300 8000 10000 12000 Rated lightning impulse withstand voltage peak value Up kV 75 110 125 Rated power frequency withstand voltage effective value Ud kV 28 50 50 Ra...

Page 36: ...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 47 Ambient conditions U U0 Ka U Rated withstand voltage U under standard reference atmosphere U0...

Page 37: ...ring 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 1st shunt release Y1 60 ms 2nd and 3rd release Y2 Y4 Y6 Y7 55 ms Arcing time 15 ms Break time 1st shunt release Y1 75 ms 2nd and 3rd release Y2 Y4 Y6 Y7...

Page 38: ...owing circuit diagrams Y1 Y2 Y4 Y4 Y5 Y6 Y7 Y7 OPEN release Y1 Y2 Y4 Y4 Y5 Y6 Y7 Y7 OPEN release extended auxiliary switch HA Manual opening S3 Position switch opens when closing spring is charged HE Manual closing S41 S42 Position switches signal charging status K1 Contactor relay anti pumping device S6 S7 Position switches for breaker tripping signal M1 Motor X0 Low voltage interface P Energy st...

Page 39: ...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 52 Sample circuit diagram 64 pole part 1 of the vacuum circuit breaker a b c d ...

Page 40: ...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 53 Sample circuit diagram part 2 of the vacuum circuit breaker a b c d ...

Page 41: ... 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 54 Sample circuit diagram part 3 of the vacuum circuit breaker a b c d e f ...

Page 42: ... auxiliary switch terminals Fig 56 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 contact Tripping via NC contact System wiring Circuit breaker wiring ...

Page 43: ...work described in the following sections must only be performed when the switchgear has been deenergised Take safety measures to prevent reclosing Observe industrial safety regulations Ensure that the vacuum circuit breaker is installed and commissioned only by qualified personnel who are familiar with the operating instructions and observe the warning notices WARNING Risk of injury due to wrong t...

Page 44: ...ging see Fig 4 and mount according to the supplied mounting drawing Mounting the vacuum circuit breaker There are a total of 14 fixing holes on the pole plate 15 and on the mechanism box 60 for the various types of installation Use M12 screws strength class 8 8 for fastening The binding dimension drawings are relevant The framework must be made to suit the operating conditions and have sufficient ...

Page 45: ...Installation 9229 9992 176 0D 45 2013 07 08 bores for M12 screws Fig 59 Fastening options Fig 60 View Y and Z ...

Page 46: ... 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 3AH37 38 vacuum circuit breaker is installed into an earthed metal frame and is connected permanently and electrically conductive no separate earthing needs to be done P...

Page 47: ...anism 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...

Page 48: ...ry lightly grease the bright contact areas with acid free Vaseline e g Shell Vaseline 8420 and screw together immediately Fig 65 Cleaning the contact areas Fig 66 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 cleaning tools Silver plated ...

Page 49: ...en 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 67 Installing busbars flat Fig 68 Installing busbars flat Note For vacuum circuit breakers with connecting bars it is recommended to use the stainless steel screws or non magnetisable screws included in th...

Page 50: ...Installation 50 9229 9992 176 0D 2013 07 08 Blank page ...

Page 51: ...strip 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 transport securing device from the undervoltage release on page 47 Test switching without supply voltage Charge the closing spring 62 wi...

Page 52: ...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 Siemens representative 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 imm...

Page 53: ...ate 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 corresponding 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 does not change Discharg...

Page 54: ...Operation 54 9229 9992 176 0D 2013 07 08 Blank page ...

Page 55: ...if applicable For this only the following agents may be used on the individual functional parts of the circuit breaker Lubricant 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...

Page 56: ...e pole side Order no 180 g Klüber Isoflex Topas L 32 3AX11 33 3H 1 kg Shell Tellus Oil 32 special oil 3AX11 33 2D 1 kg Klüber Isoflex Topas L 32 3AX11 33 3E Isoflex Topas L 32 t Bolts of the angle lever u Bolts and eyebolt of the insulating operating rod v Contact pressure spring spring plate and spring bearing w Spring guide and bolts of the angle lever ...

Page 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 ...

Page 58: ...eplaced only by trained and certified personnel Fig 74 Accessories available for order Always specify the vacuum circuit breaker s type and serial no see Rating plate on page 34 when ordering spare parts CAUTION Risk of injury The vacuum circuit breaker should be taken out of the switch cabinet or switchgear for servicing Separate vacuum circuit breakers from the control feed voltage or switch it ...

Page 59: ... and mixed scrap residues is more environmentally sustainable 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 glass fibre...

Page 60: ...Maintenance 60 9229 9992 176 0D 2013 07 08 Blank page ...

Page 61: ...king devices 32 Interrupter support 20 Interrupter service life 58 Interrupter vacuum check 58 L Low voltage interface 22 23 M Mechanical anti pumping device 23 Mechanical interlock 23 32 Mechanical manual closing 23 31 Mechanical manual opening 23 Mechanism box 19 22 Motor 22 24 Mounting position 44 O Opening spring 22 Operating cycle counter 22 23 Operating position 32 Operating rod 22 P Pole as...

Page 62: ...Index of keywords 62 9229 9992 176 0D 2013 07 08 Blank page ...

Page 63: ...ushbutton 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 Contact position indicator CLOSED OPEN 59 1 Opening for position indicator CLOSED OPEN 60 Mechanism...

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

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