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Siemens 3AH35-SE Series Instruction Manual
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Siemens 3AH35-SE Series Instruction Manual

Siemens 3AH35-SE Series Instruction Manual

Vacuum circuit breaker stored-energy operator module
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Instruction manual
Type 3AH35-SE vacuum circuit breaker
stored-energy operator module
Installation operation maintenance E50001-F710-K376-V4-4A00
www.usa.siemens.com/sdv7

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Summary of Contents for Siemens 3AH35-SE Series

  • Page 1 Instruction manual Type 3AH35-SE vacuum circuit breaker stored-energy operator module Installation operation maintenance E50001-F710-K376-V4-4A00 www.usa.siemens.com/sdv7...
  • Page 2 In addition, this person has the installation, operation and maintenance of the equipment following qualifications: purchased. Siemens reserves the right to make changes in the Is trained and authorized to specifications shown herein or to make improvements at any de-energize, clear, ground and tag circuits and equipment in time without notice or obligation.

  • Page 3: Table Of Contents

    The sales contract contains the entire obligation of Siemens Industry, Inc. The warranty contained in the contract between the parties is the sole warranty of Siemens Industry, Inc. Any statements contained herein do not create new warranties or modify the...

  • Page 4: Introduction

    Siemens. Warning - Indicates a potentially hazardous The purpose of this instruction manual is to...
  • Page 5 (except for For medium voltage customer service issues, test of the charging mechanisms). Check contact Siemens at +1 (800) 347-6659 or +1 to be certain that the indicator flags read (919) 365-2200 outside the U.S. OPEN and DISCHARGED.

  • Page 6: Installation Checks And Functional Tests

    Installation checks and functional tests Introduction Spring-discharge check This section provides a description of the Perform the spring-discharge check after inspections, checks and tests to be performed de-energizing control power. This check on the circuit breaker stored-energy module assures both the tripping and closing springs only.
  • Page 7 Hazardous voltage and high-speed moving parts. Will cause death, serious injury and property damage. Read instruction manuals, observe safety instructions and use qualified personnel. Automatic spring-charging check 5. Perform the spring-discharge check. The automatic spring-charging features of the A. Press red Trip pushbutton. circuit breaker must be checked.

  • Page 8: Vacuum Interrupter/Operator

    Vacuum interrupter/ operator Introduction Figure 1: Operator panel controls of circuit breaker and manual charging of closing spring The type 3AH35-SE vacuum circuit-breaker operator is intended for stationary applications, such as the type SDV7-SE 59.0 outdoor distribution circuit breaker. The type 3AH35-SE circuit breaker conforms to the requirements of ANSI/IEEE standards, 58.0...
  • Page 9 Primary connections Figure 2: Vacuum circuit breaker operator Item Description module on page 8 illustrates the pad Fixed-contact current connection provision to accept the primary connections. Ceramic insulator Each circuit breaker has three connection Arc shield pads at the fixed end of the vacuum Fixed contact interrupter, and three connection pads on the flexible connectors that are associated with...
  • Page 10 Construction Vacuum interrupter (refer to Figure 5: Each of the circuit breaker poles are fixed to Pole assembly on page 11) the pole support channel by two cast-resin The moving-contact motion is aligned and insulators. The insulators also connect to the stabilized by a guide bushing.
  • Page 11 Operating mechanism Construction The operating mechanism is comprised of the The essential parts of the operating mechanical and electrical components mechanism are shown in Figure 6: Stored- required to: energy operating mechanism (circuit breaker shown in OPEN position) on page 12. The 1.
  • Page 12 Figure 6: Stored-energy operating mechanism (circuit breaker shown in OPEN position) 60.0 59.0 63.0 63.7 63.5 63.5 58.0 61.8 50.4 64.0 62.0 64.2 62.8 68.1 54.0 55.0 20.0 55.1 50.4.1 54.1 53.1 62.6 55.2 50.2 53.0 68.0 62.5.2 62.2 62.1 50.3 62.5 62.3...
  • Page 13 Mode of operation Closing (refer to Figure 6: Stored-energy The operating mechanism is of the stored- operating mechanism (circuit breaker energy trip-free type. The charging of the shown in OPEN position) on page 12) and closing spring is not automatically followed Figure 7: Operating mechanism section by the contacts changing position, and diagram mechanism OPEN, closing spring...
  • Page 14 Trip-free function for the type SDV7-SE Manually charging the closing spring outdoor distribution circuit breaker (Refer to Figure 9: Use of manual spring- For the type SDV7-SE outdoor distribution operation crank and Figure 10: Manual circuit breaker, the trip-free function is spring-charging crank on page 17) accomplished by blocking the movement of Insert the hand crank (50.0) with the over...
  • Page 15 Figure 7: Operating mechanism section diagram mechanism OPEN, closing spring DISCHARGED Item Description Circuit breaker OPEN, Circuit breaker OPEN, 48.0 Insulating coupler closing spring DISCHARGED closing spring CHARGED 49.0 Contact pressure spring 48.0 48.0 50.2 Charging mechanism gearbox 50.3.1 Driver 49.0 49.0 50.4...
  • Page 16 Figure 8: Operator sequential operation diagram Closing Anti-pumping feature (52Y) assures a continuously applied closing command does not cause the Control circuit breaker to reclose automatically after it has tripped out on a fault. voltage applied. Undervoltage Spring-charge motor Continuous device 27 picks up.
  • Page 17 Close coil (52SRC) The close coil (3AY1510) is a standard component of the circuit breaker that is used to unlatch the stored energy of the closing spring and thus close the circuit breaker electrically. It is available for either ac or dc 54.0 55.0 operation.
  • Page 18 Figure 11: Typical elementary diagram Legend Schematic shown with closing springs discharged and circuit 01/C Control switch close (remote) Red indicating light (remote) breaker open. 01/T Control switch trip (remote) Closing spring position switch, closed Close and trip power disconnect when closing spring is discharged Motor power disconnect Closing spring position switch, open...
  • Page 19 Indirect releases - secondary shunt Item Description release (dual trip) (52T1) or undervoltage Magnet core (27.0) Housing The indirect release provides for the Mounting holes conversion of modest control signals into powerful mechanical-energy impulses. It is Magnet coil primarily used to open medium-voltage Magnet armature circuit breakers while functioning as a 11.0...
  • Page 20 Cancel the lock for the undervoltage release by shifting Item Description Construction and mode of operation of the locking screw (29.0) from A to B. secondary shunt-release and 23.0 Striker pin undervoltage release Locked/unlocked 29.0 The release consists of a spring-power stored- selection screw energy mechanism, a latching device and an electromagnet.
  • Page 21 Since the striker pin of the undervoltage Auxiliary switch (52a/b) release 3AX1103 is latched only when the Figure 6: Stored-energy operating mechanism armature is energized, the undervoltage (circuit breaker shown in OPEN position) on release is provided with a screw (29.0), for page 12) shows the circuit breaker mounted locking the striker pin (23.0) in the normal auxiliary switch (68.0).

  • Page 22: Maintenance

    The maintenance tasks in Table 1 must be performed regularly. Introduction and maintenance intervals Regardless of the length of the maintenance Periodic inspections and maintenance are and lubrication interval, Siemens essential to safe and reliable operation of the recommends that circuit breakers should be circuit breaker.
  • Page 23 Siemens sales office. Deep sockets: 19 and 24 mm Checks of the primary power path Hex keys: 5, 6, 8 and 10 mm...
  • Page 24 Cleanliness check Inspection items and tests Figure 2: Vacuum circuit breaker operator Primary-power path checks module on page 8 is a side view of the circuit Cleanliness check breaker with the insulating barriers removed Inspection of flexible connectors (if furnished) to show the vacuum interrupter, and the fixed-end and moving-end Stored-energy operator mechanism checks connection pads.
  • Page 25 Maintenance and lubrication Number of years/closing Circuit operations (whichever comes Table 2 gives the recommended maintenance breaker type first) intervals for circuit breakers. These intervals assume that the circuit breaker is operated SDV7-SE 5 years/10,000 operations under “usual service conditions” as discussed in ANSI/IEEE C37.04, section 4 and elaborated in ANSI/IEEE C37.010, section 4 for outdoor Table 2: Maintenance and lubrication schedule...
  • Page 26 Figure 16: Operator mechanism lubrication Klüber L32 or Klüber L32N Behind the cover...
  • Page 27 High-speed moving parts. Can result in serious injury. Tripping spring is charged. If trip latch is moved, the stored-energy springs will discharge rapidly. Stay clear of circuit breaker components that are subject to sudden, high- speed movement. Manual spring-charging and contact- b) Observe the white contact-erosion erosion checks mark (refer to Figure 17) of each pole.
  • Page 28 Hazardous voltage and high-speed moving parts. Will cause death, serious injury and property damage. Do not bypass interlocks or otherwise make interlocks inoperative. Interlocks must be in operation at all times. Read instruction manuals, observe safety instructions and use qualified personnel.
  • Page 29 Table 3: Typical vacuum interrupter contact life expectancy Right hand limit of Rated maximum Interrupting class Rated short-circuit Vacuum interrupter Graph curve (refer to voltage kV current type Figure 18) 15.5 VSS-17006 15.5 VS-25008 15.5 VSS-17006 15.5 VS-25008 15.5 31.5 31.5 VS-15052 31.5...
  • Page 30 Figure 18: Typical vacuum interrupter contact life curves Load graph "A" vacuum interrupter type VS-25008 or VSS-17006 Load graph "B" vacuum interrupter type VS-15052 Load graph "C" vacuum interrupter types VS-30030 and VS-30041 Permissible operating cycles 100,000 50,000 20,000 10,000 5,000 2,000 1,000...
  • Page 31 Checks of the spring-charging motor (88) Vacuum-integrity check (using No additional checks of the spring-charging mechanical test) (refer to Figure 19: motor are necessary. If it is necessary to Manual check of vacuum integrity on remove or replace the spring-charging motor, page 34) torque motor-mounting hardware to Before putting the circuit breaker into service,...
  • Page 32 Vacuum interrupters may emit X-ray radiation. Can result in serious injury. Keep personnel more than six feet away from a circuit breaker under test. High-potential tests High-potential test voltages The next series of tests (vacuum-integrity test The voltages for high-potential tests are and insulation tests) involve use of high- shown in Table 4 on page 33.
  • Page 33 Equipment rated power- Equipment maximum Maximum ac rms test Maximum dc test frequency withstand kV voltage rating kV voltage kV voltage kV (rms) 15.5 27.6 Table 4: High-potential test voltages As-found insulation and contact Insulation and contact-resistance test resistance tests equipment As-found tests verify the integrity of the In addition to the high-potential test...
  • Page 34 Insulation and contact-resistance test procedure 1. Observe safety precaution listed in the danger and warning advisories for the vacuum integrity check tests (refer to pages 31-32). 2. Close the circuit breaker. Ground the 48.6 frame of the circuit breaker, and ground each pole not under test.
  • Page 35 Inspection and cleaning of circuit breaker Functional tests Contact Current rating resistance insulation Refer to the installation checklist in the Micro-Ohms 1. Perform the spring-discharge check (refer installation checks and initial functional to page 6) on the circuit breaker after all tests section of this instruction manual 1,200 control power is removed.

  • Page 36: Overhaul

    Introduction c) Install replacement coils with new M4 type operations The following procedures along with the x 10 hex-head screws (Siemens part # troubleshooting charts in this instruction 00-000-443-820) and new lock SDV7-SE outdoor manual (refer to pages 42-43), provide...
  • Page 37 (18 mm trained personnel. Contact Siemens or 24 mm socket with extension). medium-voltage customer service at +1 1.8 Using a 24 mm socket with an...
  • Page 38 Figure 20: Vacuum interrupter replacement illustration 29.1 28.0 20.0 28.1 40.0 36.3 29.3 31.2 29.2 36.1 48.6 48.5 30.0 48.9 48.0 16.1 Identification Description 16.1 Post insulator 20.0 Fixed-end pole head 28.0 Strut 28.1 Centering ring 29.1 Flexible connector 29.2 Terminal clamp 29.3 Spacer (or shoulder)
  • Page 39 2.4 Align vacuum interrupter and fasten Identification Description “finger tight” to the fixed-end pole 29.2 Terminal clamp head (20.0) using heavy flat washer, 36.1 lock washer and bolt (31.2). Spacer (or 29.3 shoulder) 2.5 Attach struts (28.0) to the fixed-end 30.0 Vacuum pole head (20.0), replace hardware...
  • Page 40 Checking the contact stroke Hydraulic shock absorber The mechanism is equipped with a hydraulic 3.1 Open the circuit breaker. shock-absorber that functions when the 3.2 Free insulating coupler (48.0) by circuit breaker opens (refer to item 61.8 in removing pin (48.5). The vacuum Figure 6: Stored-energy operating interrupter contacts must now close mechanism (circuit breaker shown in OPEN...

  • Page 41: Technical Data And Troubleshooting

    The vacuum interrupter type designation is labeled on the vacuum interrupter. If the vacuum interrupter installed does not match that indicated in this table, contact the nearest Siemens representative. If you need assistance achieving the indicated stroke setting, contact the nearest Siemens representative.
  • Page 42 5. Motor cut-off switch LS21 or LS22 fails to operate. Replace if necessary. 6. Mechanical failure of operating mechanism. Check and contact the factory or Siemens field service at +1 (800) 347-6659 or +1 (919) 365-2200 outside the U.S. 1. Secondary control circuit de-energized or control circuit fuses blown.
  • Page 43 Check to determine if problems are in Nuisance or false close wiring or coil. Correct as required. 1. Mechanical failure of operating mechanism. Check and contact the factory or Siemens field Mechanical problem service at +1 (800) 347-6659 or +1 (919) 365- 2200 outside the U.S.
  • Page 44 Table 9: Technical ratings Rated withstand Rated transient Rated Rated Rated voltages recovery voltage Rated short- Rated Rated permissible closing Circuit time maximum circuit and interrupting continuous tripping breaker Lightning Power voltage short-time time current delay time latching type impulse peak frequency voltage...
  • Page 45 Table 12: Technical ratings Item Unit 15.5 kV 27.6 kV 38.0 kV Lightning impulse withstand voltage Full wave 1.2/50 µs Chopped wave 2 µs Chopped wave 3 µs ---- ---- ---- Power-frequency withstand voltage Rated short-circuit current 20/25/31.5/40 20/25 20/25/31.5/40 %dc component Rated (making) closing and latching 52/65/82/104...
  • Page 46 Table 13: Remarks...
  • Page 47 Table 13: Remarks (continued)
  • Page 48 The requested performance features are binding only when they are expressly agreed upon in the concluded contract. Published by Siemens Industry, Inc. 2015. For more information, please contact Article No. E50001-F710-K376-V4-4A00 our Customer Support Center.