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Siemens 3AH37 Operating Instructions Manual

Vacuum circuit-breaker.
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3AH37/38
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
© Siemens AG 2006. All rights reserved.
Order no.: 9229 9992 176 0D
Ordering location: IC LMV LP PO P C41
AG 07.2013 en

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   Summary of Contents for Siemens 3AH37

  • Page 1 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 © Siemens AG 2006. All rights reserved.
  • Page 2: For Your Safety

    • training in providing first aid. Product liability Note Product liability claims are upheld only if the replacement of the purchased spare parts is performed by personnel that has been trained and certified by Siemens. 9229 9992 176 0D 2013-07-08...
  • Page 3: Table Of Contents

    ≤ 4000 A. Sections with Addendum (III) refer to vacuum circuit-breakers with a rated operating current of  5000 A. If no addendum is given, the information is applicable for all 3AH37/38 vacuum circuit-breakers. 9229 9992 176 0D...
  • Page 4 Blank page 9229 9992 176 0D 2013-07-08...
  • Page 5: Transport, Storage And Packing

    Transport, storage and packing Transport, storage and packing Transport 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. Transport weight Refer to the delivery slip for the weight of the transport unit.
  • Page 6: Unpacking (i)

    Ensure that any damage to the transport unit is confirmed by the transport company. Unpacking (I) 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. Working equipment Required tools: Knife/scissors Lifting equipment with lifting gear...
  • Page 7 Transport, storage and packing Fig. 3 Removing the carton 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. Note Do not use the vacuum circuit-breaker if parts are broken, i.e.
  • Page 8 Transport, storage and packing Fig. 4 Removing partitions and foil Fig. 5 Transporting with pallet possible • Remove partitions and accessory pack and store safely in the packaging for later attachment. • Remove foil from the vacuum circuit-breaker. • In the case of overseas packaging, push the lower foil onto the pallet floor. •...
  • Page 9 Transport, storage and packing 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 Transporting without pallet •...
  • Page 10 Transport, storage and packing Fig. 8 Positioning the square timbers and setting Fig. 9 Transporting without pallet down the vacuum circuit-breaker • Set the vacuum circuit-breaker down onto the square timbers. • Hang further sling gear into the transport boreholes. •...
  • Page 11: Unpacking (ii)

    Transport, storage and packing Unpacking (II) Variant with bracketsRemove carton as described in Fig. 3. Working equipment Required tools: Knife/scissors Screwdriver Open-end wrench Lifting equipment with lifting gear. Fig. 10 Removing partitions and foil Fig. 11 Lifting the vacuum circuit-breaker Transporting with brackets •...
  • Page 12 Transport, storage and packing Fig. 12 Removing screws from the pallet Fig. 13 Removing the angle plate and brackets Transporting without • Only lift the vacuum circuit-breaker so that all sling gear is tensioned. brackets • Remove angle plate and bracket screws from the pallet. •...
  • Page 13: Unpacking (iii)

    Transport, storage and packing Unpacking (III) 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. Working equipment Required tools: Screwdriver Knife/scissors Lifting equipment with lifting gear.
  • Page 14 Fig. 19 Removing the foil • 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. 9229 9992 176 0D 2013-07-08...
  • Page 15 Transport, storage and packing 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 Transporting to the •...
  • Page 16: Reusing The Transport Unit

    • Screw the wooden case back together. • Before returning to the factory, ask the responsible Siemens representative for a returned goods number (see also “Service” on page 59). • When returning a vacuum circuit-breaker, always indicate the type and serial number (see “Rating plate”...
  • Page 17: General Information

    The basic version and all listed configurations of the vacuum circuit-breakers 3AH37/38 are type-tested devices as per IEEE (12 kV 90 kA as per IEC). Note In the event of subsequent attachments or fittings, e. g. locking parts in connection with switchgear, ensure that •...
  • Page 18: Standards

    General information Standards The 3AH37/38 vacuum circuit-breakers comply with the regulation IEEE C37.013. All 3AH37/38 vacuum circuit-breakers comply with the specifications for C2-, E2- and M2-class circuit-breakers in accordance with IEC 62271-100. Design approval as per X-Ray Ordinance The vacuum interrupters installed in the vacuum circuit-breakers are of a design approved under the X-Ray Ordinance (RöV) of the Federal Republic of Germany.
  • Page 19: Description

    Description Description Design Vacuum circuit-breaker The 3AH37/38 vacuum circuit-breaker consists of • the mechanism box (60.), • the 3 pole assemblies (19.) with vacuum interrupters (30.), • the cast resin post insulators (16.1 and 16.2) with reinforcing struts (28.) and •...
  • Page 20 Description Pole assembly The pole assembly (19.) of the 3AH37/38 vacuum circuit-breaker consists of • the upper interrupter support (20.) • with the upper terminal (27.) • of the vacuum interrupter (30.); • the lower interrupter support (40.) with the lower terminal (29.) and the clamp (29.2) with flexible connector (29.1);...
  • Page 21 Description 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). Fig.
  • Page 22 Description Fig. 26 Opened mechanism box 50.2 Gear unit Mechanism box 50.4 Motor M1 Dashpot 50.4.1 Position switch Closing spring 50.5 Hand crank coupling Circuit-breaker shaft Rating plate Opening spring 53.1 Closing solenoid Y9 Closing damper 54.1 Shunt release Y1 Auxiliary switch S1 54.2 Shunt release Y2...
  • Page 23 • Terminal strip (X1) Operating cycle counter Mechanical anti-pumping device Mechanical manual closing and opening Additional equipment Every 3AH37/38 vacuum circuit-breaker can also be fitted with the following equipment: (Y2, Y3) Shunt release 3AX1101 (Y4, Y5) Transformer-operated release 3AX1102 (Y6) Transformer-operated release 3AX1104 (0.1 AC)
  • Page 24 Description Motor (M1) After the supply voltage is applied and if the closing spring is discharged, the motor starts immediately and is automatically deactivated internally after charging has taken place. Power consumption, maximum: • in the event of direct voltage approx. 750 W •...
  • Page 25 Description Closing solenoid (Y9) 3AY1510 The closing solenoid Y9 unlatches the charged closing spring and switches the vacuum circuit-breaker on electrically . It is available for DC or AC voltage . The closing solenoid Y9 is not designed for continuous operation and is automatically deactivated within the circuit-breaker.
  • Page 26 Description Auxiliary switch S1 Two versions of the auxiliary switch S1 are available 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.
  • Page 27 Description Position switch S21, S22 Position switches (switch off the motor after charging) Position switch (opens when closing spring is charged) S41, S42 Position switches (report charging state) Fig. 34 Position switch (50.4.1) Circuit-breaker tripping signal, cut-out switch (S6, S7) The position switch S6 makes contact briefly when the vacuum circuit-breaker is opened by means of an electrical release.
  • Page 28 Description Low-voltage interface X0, 64-pin Fig. 36 Low-voltage interface X0 Fig. 37 Terminal strip (optional) For connection of the control line, the standard version of the vacuum circuit- breakers is equipped with a 64-pin low-voltage interface X0 (68.7). The 64-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 mm Terminal strip (optional) Instead of the 64-pin plug (68.7.1), a terminal strip (68.7.2) can be ordered as...
  • Page 29 Description A further shunt release, transformer-operated release, undervoltage release or instantaneous release can be installed as a 2nd release. 2nd shunt release (Y2) 3AX1101 The second shunt release Y2 is installed whenever more than one shunt release is needed. In this version, the electrical "off" command is passed by means of a magnet armature to the "OPEN"...
  • Page 30 Description Undervoltage release (Y7) 3AX1103 Note The undervoltage release Y7 must only be operated with the supplied series resistor R1. Note For switching operations (mechanical or electrical), the undervoltage release 3AX1103… must be connected to control voltage, as otherwise closing is not possible (see “Removing the transport securing device from the undervoltage release”, page 47).
  • Page 31 Description Heater (condensation water protection) The heater limits condensation and corrosion of the vacuum circuit-breaker. To this end, the heater has to be connected to the supply voltage (see circuit diagram included with the delivery). The heater's surface temperature is at the most 180 °C. Power consumption 50 W, Rated voltage AC 230 V Fig.
  • Page 32: Interlocking Devices

    Description Interlocking devices To lock vacuum circuit-breakers as a function of the switching position, the spring drive mechanisms of the vacuum circuit-breaker can be equipped with an interlocking device. This is also the case for vacuum circuit-breakers on switch gear trucks, in withdrawable sections or with disconnectors.
  • Page 33 Description Priority opening To lock the OPEN position, the drive 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: Rating Plate

    Rated operating current I r Made in Germany Rated short-circuit duration t k Mass m Fig. 44 Example - vacuum circuit-breaker rating plate 3AH37/38 Rated operating sequence Classification to standard Technical data Vacuum circuit-breakers with one phase per interrupter...
  • Page 35 Dimensions and weights The dimensions of the vacuum circuit-breaker can be taken from the relevant dimension drawing. If required, these are available from your Siemens representative. The weight is given on the rating plate of the vacuum circuit-breaker (see Fig. 44) or can be taken from the relevant dimension drawing.
  • Page 36: Ambient Conditions

    Description Ambient conditions 3AH37/38vacuum circuit-breakers are suitable for use in the following climate classes in accordance with IEC 60721, Part 3-3: Class • Climatic ambient conditions: 3Z2, • Biological ambient conditions: • Mechanical ambient conditions: • Chemically active substances: •...
  • Page 37: Switching Times

    Description Switching times 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: Circuit Diagrams

    Description Circuit diagrams The circuit diagrams show all the available components with their wiring options. Fig. 50 to Fig. 56 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 "OPEN"...
  • Page 39 Description 1) Integrated varistor 2) Integrated rectifier for AC/DC≥ 100 V 3) Line H07V-K1x2.5sw (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...
  • Page 40 Description 1) Integrated varistor 2) Integrated rectifier 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 9229 9992 176 0D 2013-07-08...
  • Page 41 Description 1) Integrated varistor 2) Integrated rectifier for AC/DC≥ 100 V 3) Attention: connect L+ for 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 Breaker tripping signal for 64-pole plug-connector Fig.
  • Page 42 Description The unassigned auxiliary switch terminals are wired up (as shown) with the 64-pole plug bottom. Normal auxiliary switch Extended auxiliary switch No wiring required if a) 2nd shunt release Y2 available b) Undervoltage release Y7 available Fig. 55 Example – auxiliary switch terminals System wiring Tripping via Tripping via NO contact...
  • Page 43: Installation

    Installation Installation DANGER High-voltage - danger to life Touching live parts causes an electric shock. • Do not touch live parts! • When performing work on the switchgear, deenergise it and earth it. • The work described in the following sections must only be performed when the switchgear has been deenergised: Take safety measures to prevent reclosing.
  • Page 44 Installation Mounting position The 3AH37/38 vacuum circuit-breaker can be installed indoors and vertically or horizontally (optionally, mechanism box at the bottom) in relation to the interrupters. Fig. 57 Mounting position Mounting the partitions Carefully take the partitions out of the packaging (see Fig. 4) and mount according to the supplied mounting drawing.
  • Page 45 Installation Fig. 59 Fastening options Fig. 60 View Y and Z * bores for M12 screws 9229 9992 176 0D 2013-07-08...
  • Page 46: Earthing

    Tighten ring terminal for the earth wire with the M12 hexagon screw and washer on the earth terminal (70.) with 40 Nm. 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.
  • Page 47: Electrical Connection Of The Prime Conductor

    51). Note Grease the busbars with contact grease prior to mounting. 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 circuit-breaker.
  • Page 48 Installation 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.
  • Page 49 Installation Fig. 67 Installing busbars flat Fig. 68 Installing busbars flat Corresponding to the rated current strength, use M12 screws and nuts - strength class 8.8 - for connection of the busbars and use the appropriate spring elements and washers. Note For vacuum circuit-breakers with connecting bars, it is recommended to use the stainless steel screws or non-magnetisable screws included in the accessory...
  • Page 50 Installation Blank page 9229 9992 176 0D 2013-07-08...
  • Page 51: Operation

    • Check through all of the items on the checklist and ensure correct functioning before commissioning. Commissioning Before commissioning, check the following points to ensure that the 3AH37/38 vacuum circuit-breaker is functioning faultlessly:  Checklist Notes Does the information on the rating plate (see page 34) match the ordering data? Ensure correct operating voltage.
  • Page 52: First Closing Operation

    Operation 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 . First closing operation If all functions have been checked and are ok, switch on high-voltage while observing all of the safety regulations and operative requirements.
  • Page 53: Closing

    Operation The adapter (50.6) of the hand crank (50.) is designed in such a way that the hand crank becomes uncoupled when the motor supply voltage returns. Closing Provided there is no lock-out due to a mechanical interlock, send the closing command via the CLOSE pushbutton (53.) or the corresponding command element until the vacuum circuit-breaker is closed and shows and signals the CLOSED position.
  • Page 54 Operation Blank page 9229 9992 176 0D 2013-07-08...
  • Page 55: Maintenance

    Special operating conditions If the vacuum circuit-breaker 3AH37/38 is operated under unfavourable indoor conditions that deviate from the normal operating conditions (frequent heavy condensation, dusty air etc.), we recommend regular cleaning of the outer circuit- breaker parts and renewing the corrosion protection, if applicable.
  • Page 56 Maintenance Lubricants are available from the responsible Siemens representative: 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...
  • Page 57 Maintenance  Isoflex Topas L 32 Shell Tellus Oil 32  Crankpin for sensing device actuation Bearing for deflection lever Curve contour Auxiliary switch Close-latch Circuit-breaker shaft bearing Deflection of auxiliary switch Opening spring bearing Opening spring guide Spring eyelet on closing spring Deflection of auxiliary switch OPEN-latch Curve for OPEN-latch...
  • Page 58: Interrupter Service Life

    Maintenance 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 10 000 mechanical or electrical load setting changes (up to the rated current).
  • Page 59: Manufacturer's Product Liability

    Germany, the applicable local laws and regulations must be complied with. Further information Contact your Siemens Service Center if you require further information. Service For details of contacts for service work, consult Siemens IC LMV SE Services at • Telephone: +49 180/5247000 •...
  • Page 60 Maintenance Blank page 9229 9992 176 0D 2013-07-08...
  • Page 61: Index Of Keywords

    Index of keywords Index of keywords Mechanical interlock ........23 Mechanical manual closing ......23 Accessories available for order ......58 Mechanical manual opening ........23 Altitude correction factor ........36 Mechanism box ..........19 Ambient conditions ..........36 Motor ............22 Angle lever ............
  • Page 62 Index of keywords Blank page 9229 9992 176 0D 2013-07-08...
  • Page 63: Legend For All Pages

    Legend for all pages Legend for all pages Pole plate Opening spring 16.1 Upper post insulator Closing damper 16.2 Lower post insulator Auxiliary switch S1 (6NO+6NC) Pole assembly, complete 68.0.1 Extended auxiliary switch S1 (12NO + 12NC) Upper interrupter support 68.1 Operating rod (for auxiliary switch S1) Upper terminal...
  • 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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