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Trip-free function for the type SDV7-SE
outdoor distribution circuit breaker

For the type SDV7-SE outdoor distribution
circuit breaker, the trip-free function is
accomplished by blocking the movement of
the close latch pawl (62.5.2) when the
manual trip pushbutton is actuated. The trip-
free function is in accord with ANSI/IEEE
C37.04-1999, clause 6.9.a.

Opening (refer to Figure 6: Stored-energy
operating mechanism (circuit breaker shown
in OPEN position) on page 12)

If the circuit breaker is to be opened
manually, the opening spring (64.0) is
released by pressing the OPEN pushbutton
(54.0). In the case of an electrical command
being given, the trip coil 52T (54.1) unlatches
the opening spring (64.0).

The opening spring (64.0) turns the jack shaft
(63.0) via lever (63.5); the sequence being
similar to that for closing.

Rapid auto-reclosing

Since the closing spring is automatically
recharged by the motor operating mechanism
when the circuit breaker has closed, the
operating mechanism is capable of an “Open-
Close-Open” duty cycle as required for rapid
auto-reclosing.

The circuit breaker is suitable for use in
applications with a rated reclosing-time
interval of 0.3 seconds, per ANSI/IEEE C37.06-
2009.

Manual operation

Electrically operated vacuum circuit breakers
can be operated manually if the control
supply should fail.

Manually charging the closing spring

(Refer to Figure 9: Use of manual spring-
operation crank and Figure 10: Manual
spring-charging crank on page 17)

Insert the hand crank (50.0) with the over
running coupling pushed forward (50.6)
through the opening (50.1) onto hand crank
coupling (50.5) and turn it clockwise (about
48 revolutions) until the closing-spring
indicator (55.0) shows CHARGED. The hand
crank is coupled with the charging
mechanism via an over-running coupling;
thus the operator is not exposed to any risk
should the control supply be restored during
manual charging.

Manual closing (refer to Figure 6: Stored-
energy operating mechanism (circuit breaker
shown in OPEN position) on page 12)

Press the close button (53.0). The CLOSE/
OPEN indicator (58.0) will then display
CLOSED and the closing spring condition
indicator (55.0) will now read DISCHARGED.

Manual opening (refer to Figure 6: Stored-
energy operating mechanism (circuit breaker
shown in OPEN position) on page 12)

The opening spring (64.0) is charged during
closing. To open the circuit breaker, press the
Open pushbutton (54.0) and OPEN will be
displayed by indicator (58.0).

The schematic shown in Figure 11: Typical
elementary diagram on page 18 is intended
to aid in understanding the mechanism
operation discussed in this instruction
manual. Refer to the schematic diagram
furnished with your circuit breaker for specific
information.

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Содержание 3AH35-SE Series

Страница 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 ...

Страница 2: ...iar with the installation construction or operation of the equipment and the hazards involved In addition this person has the following qualifications Is trained and authorized to de energize clear ground and tag circuits and equipment in accordance with established safety procedures Is trained in the proper care and use of protective equipment such as rubber gloves hard hat safety glasses or face...

Страница 3: ...he contents of this instruction manual shall not become part of or modify any prior or existing agreement commitment or relationship 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 existing warra...

Страница 4: ...ent before maintenance Maintenance should be performed only by qualified personnel The use of unauthorized parts in the repair of the equipment or tampering by unqualified personnel will result in dangerous conditions that will cause death severe injury or equipment damage Follow all safety instructions contained herein Signal words The signal words danger warning and caution used in this manual i...

Страница 5: ...that the indicator flags read OPEN and DISCHARGED 3 Always let an interlock device or safety mechanism perform its function without forcing or defeating the device Field service operation and warranty issues Siemens can provide competent well trained field service representatives to provide technical guidance and advisory assistance for the installation overhaul repair and maintenance of Siemens e...

Страница 6: ... switch or molded case circuit breaker or removing the pullout type fuse holder accomplishes the desired result control power is disconnected Spring discharge check Perform the spring discharge check after de energizing control power This check assures both the tripping and closing springs are fully discharged Refer to Figure 1 Operator panel controls of circuit breaker and manual charging of clos...

Страница 7: ...uit breaker and manual charging of closing spring on page 8 to first close and then open the circuit breaker contacts Verify contact positions visually by observing the OPEN CLOSED indicator on the circuit breaker 3 In step 2 when the close pushbutton was pressed the circuit breaker should have closed and the closing spring should have recharged automatically 4 De energize control power by opening...

Страница 8: ...ge 9 is a section view of a typical vacuum interrupter The entire assembly is sealed after a vacuum is established The vacuum interrupter stationary contact is connected to the fixed end pole head of the circuit breaker The vacuum interrupter movable contact is connected to the flexible shunt associated with the other pole head and to the driving mechanism of the circuit breaker The metal bellows ...

Страница 9: ...necessary to close and open the contacts of the vacuum interrupters is stored in powerful opening and closing springs The closing springs are normally charged automatically after a closing operation but there are provisions for manual charging The operating mechanism that controls charging closing and tripping functions is fully trip free Trip free requires that the tripping function prevail over ...

Страница 10: ...tionary contact and the moving contact plus a flexible shunt between the moving contact terminal clamp and the moving end connection pad Vacuum interrupter refer to Figure 5 Pole assembly on page 11 The moving contact motion is aligned and stabilized by a guide bushing The metal bellows follows the travel of the contact and seals the vacuum interrupter against the surrounding atmosphere Switching ...

Страница 11: ...uence of operation of the mechanism is described in Figure 6 Stored energy operating mechanism circuit breaker shown in OPEN position on page 12 Motor operating mechanism refer to Figure 6 Stored energy operating mechanism circuit breaker shown in OPEN position on page 12 The spring charging motor 50 4 is bolted to the charging mechanism 50 2 gear box installed in the operator housing Neither the ...

Страница 12: ...1 Limit switches 61 8 Shock absorber 50 5 Manual spring charging port 62 0 Closing spring 63 3 Lever phase A to right of housing 53 0 Close pushbutton 62 1 Charging shaft 53 1 Close coil 52SRC 62 2 Crank 63 5 Lever phase B 54 0 Open pushbutton 62 3 Cam disc 63 7 Lever 54 1 Trip coil 52T 62 5 Lever 64 0 Opening spring 55 0 Closing spring charge indicator 62 5 1 Pawl roller not visible 68 0 Auxiliar...

Страница 13: ...ame time the lever 62 5 at the other end of the charging shaft is securely locked by the close latch pawl 62 5 2 When the closing spring is being charged the charging flange cam 62 3 follows along and it is brought into position for closing when the closing spring is fully charged Closing refer to Figure 6 Stored energy operating mechanism circuit breaker shown in OPEN position on page 12 and Figu...

Страница 14: ... breakers can be operated manually if the control supply should fail Manually charging the closing spring Refer to Figure 9 Use of manual spring operation crank and Figure 10 Manual spring charging crank on page 17 Insert the hand crank 50 0 with the over running coupling pushed forward 50 6 through the opening 50 1 onto hand crank coupling 50 5 and turn it clockwise about 48 revolutions until the...

Страница 15: ...62 5 2 Close latch pawl 62 6 Drive lever 62 8 Coupling rod 63 0 Jack shaft 63 1 Lever phase C 63 3 Lever phase A 63 5 Lever phase B 63 7 Lever 64 0 Opening spring 64 2 Trip latch pawl 64 3 Lever trip latch 64 3 1 Trip latch lever roller 68 0 Auxiliary switch 68 1 Auxiliary switch link Circuit breaker OPEN closing spring DISCHARGED Circuit breaker OPEN closing spring CHARGED Circuit breaker CLOSED ...

Страница 16: ... LS3 anti pump relay 52Y picks up and seals in The anti pump relay 52Y opens two contacts in series with the close coil 52SRC The close coil 52SRC is now blocked and cannot be activated until springs are fully charged and close command is removed Rapid auto reclosing The closing spring is automatically recharged as described above Therefore when the circuit breaker is closed both of its springs ar...

Страница 17: ...ied tripping signal is passed on to the trip latching mechanism by means of a direct action solenoid armature and the circuit breaker is thus opened It is available for either ac or dc operation After completion of an opening operation the trip coil is de energized internally If operated with ac voltage a rectifier is installed in the circuit breaker Figure 9 Use of manual spring operation crank 5...

Страница 18: ...spring release coil 52Y Anti pump relay 69 Closing cutout switch 88 Spring charge motor G Green indicating light remote R Red indicating light remote LS3 Closing spring position switch closed when closing spring is discharged LS9 Closing spring position switch open when closing spring is discharged LS21 Motor cutoff switch closed when closing spring is discharged LS22 Motor cutoff switch closed wh...

Страница 19: ... 50 VA for ac power Undervoltage release 27 0 refer to Figure 13 Latch details shown charged and Figure 14 Undervoltage lock operate selection on page 20 The undervoltage release 3AX1103 is used for continuous monitoring of the tripping supply voltage If this supply voltage falls excessively the undervoltage release will provide for automatic tripping of the circuit breaker The undervoltage device...

Страница 20: ... 1 0 and is pulled away from it by the tension spring 11 0 If the magnet coil 7 0 of the secondary shunt release 3AX1101 is energized by a trip signal or if the tripping pin 15 0 is mechanically actuated magnet armature 9 0 is swung against the pole faces When this happens the latch 25 0 loses its support and releases the striker pin 23 0 that is forced out by the spring 31 0 On the undervoltage r...

Страница 21: ...ntrol voltage to a dc full wave voltage that is used to charge a large capacitor to the peak of the converted wave refer to Figure 15 Capacitor trip device on page 20 Shock absorber Circuit breakers are equipped with a hydraulic shock absorber 61 8 refer to Figure 6 Stored energy operating mechanism circuit breaker shown in OPEN position on page 12 The purpose of this shock absorber is to limit ov...

Страница 22: ...he operation conditions NFPA publication 70B Electrical equipment maintenance may be used as a guide to establish such a program Note A preventive maintenance program is not intended to cover reconditioning or major repair but should be designed to reveal if possible the need for such actions in time to prevent malfunctions during operation Introduction and maintenance intervals Periodic inspectio...

Страница 23: ... the listed tasks are provided in this section of the instruction manual The list of tasks in Table 1 Maintenance tasks on page 24 does not represent an exhaustive survey of maintenance steps necessary to ensure safe operation of the equipment Particular applications may require further procedures Should further information be desired or should particular problems arise that are not covered suffic...

Страница 24: ...ing barriers removed if furnished to show the vacuum interrupter and the fixed end and moving end connection pads All of these components must be clean and free of dirt or any foreign objects Use a dry lint free cloth For stubborn dirt use a clean cloth dipped in isopropyl alcohol except for the vacuum interrupters For stubborn dirt on a vacuum interrupter use a cloth and warm water and a small am...

Страница 25: ...movable end of the closing spring is connected to a crank arm The movable end of the opening spring is connected to the jack shaft by a pull rod Clean the entire stored energy operator mechanism with a dry lint free cloth Check all components for evidence of excessive wear Place special attention upon the closing spring crank and the insulating couplers and linkages Lubricate all non electrical mo...

Страница 26: ...26 Figure 16 Operator mechanism lubrication Klüber L32 or Klüber L32N K K K K K K K K K K K K K K K K K K K K K K K K K K K K Behind the cover K ...

Страница 27: ...ocated on the movable stem of the vacuum interrupter near the plastic guide bushing The contact erosion check procedure is a Be sure the circuit breaker primary contacts are closed b Observe the white contact erosion mark refer to Figure 17 of each pole When any part of the white contact erosion mark is visible contact wear is within acceptable limits A mechanic s mirror is a convenient means for ...

Страница 28: ...trip check control power required A check of the circuit breaker control circuits shall be performed This check is made with the control circuit of the circuit breaker energized 1 Once the circuit breaker springs are charged operate the circuit breaker electrical close command via pushbutton control switch or equivalent means Verify by both the sound of the circuit breaker closing and by the main ...

Страница 29: ...6 A 25 15 5 25 25 VS 25008 A 25 15 5 31 5 31 5 VS 15052 B 31 5 15 5 40 40 VS 15052 B 40 27 6 20 20 VS 25008 A 20 27 6 25 25 VS 25008 A 25 38 0 20 20 VS 30030 C 20 38 0 25 25 VS 30030 C 25 38 0 31 5 31 5 VS 30041 C 31 5 38 0 40 40 VS 30041 C 40 Table 3 Typical vacuum interrupter contact life expectancy Footnote 1 Maximum symmetrical interrupting current rating of circuit breaker refer to Table 9 Te...

Страница 30: ...ent symmetrical value 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 1 2 5 50 100 10 20 40 A 25 Note Right hand vertical segment of curve is located at the maximum symmetrical interrupting current rating of the circuit breaker as indicated in Table 3 B C ...

Страница 31: ...m integrity check using mechanical test refer to Figure 19 Manual check of vacuum integrity on page 34 Before putting the circuit breaker into service or if a vacuum interrupter is suspected of leaking as a result of mechanical damage check the vacuum integrity either mechanically as described in this section or alternatively electrically using a high potential test set as described in the next se...

Страница 32: ...ltage refer to Table 4 High potential test voltages on page 33 across each pole for one minute circuit breaker open 4 If the pole sustains the test voltage for that period its vacuum integrity has been verified Note Do not use dc high potential testers incorporating half wave rectification These devices produce high peak voltages High peak voltages will produce X ray radiation DC testers producing...

Страница 33: ...to detect changes in the protection afforded by the insulation system and in the integrity of the current carrying path A permanent record of periodic as found tests enables the maintenance organization to determine when corrective actions are required by watching for significant deterioration in insulation resistance or increases in contact resistance Megger is a registered trademark of Megger Gr...

Страница 34: ...pate any static charge 6 Disconnect the leads to the spring charging motor 7 Disconnect secondary circuits for the operating mechanism by disconnecting the multiple pin plug at the lower left corner of the operator and connect all pins on the operator side with a shorting wire Connect the shorting wire to the high potential lead of the high voltage tester and ground the circuit breaker housing Sta...

Страница 35: ...d applicable for certain types only 3 Clean barriers and post insulators using clean cloth dipped in isopropyl alcohol 4 Reinstall all barriers Check all visible fasteners again for condition and tightness Note Do not use any cleaning compounds containing chlorinated hydrocarbons such as trichlorethylene perchlorethylene or carbon tetrachloride These compounds will damage the phenylene ether copol...

Страница 36: ...ins etc 1 Replace vacuum interrupter instructions follow 2 Close coil 52SRC and trip coil 52T a Remove two push on terminal connections b Remove two M4 hex head screws and remove solenoid c Install replacement coils with new M4 x 10 hex head screws Siemens part 00 000 443 820 and new lock washers for M4 Siemens part 00 000 288 316 d The coil mounting screws must be installed using thread locking a...

Страница 37: ... 29 2 Employ the illustrated procedure to loosen clamp hardware refer to Figure 21 Illustration showing required technique for fastening terminal clamp hardware on page 39 1 3 Withdraw pin 48 5 from insulating coupler 48 0 and levers 48 6 1 4 Remove coupling pin from the eye bolt 36 3 1 5 Free struts 28 0 from the pole head 20 0 Loosen the strut hardware on the moving end pole head and swing the s...

Страница 38: ... Centering ring 29 1 Flexible connector 29 2 Terminal clamp 29 3 Spacer or shoulder 30 0 Vacuum interrupter 31 2 Fixed end terminal bolt 36 1 Moving terminal 36 3 Eye bolt or adapter 40 0 Moving end pole head 48 0 Insulating coupler 48 5 Pin 48 6 Angled lever 48 9 Guide link 48 0 48 5 48 9 40 0 36 3 36 1 29 1 29 2 29 3 28 1 30 0 28 0 16 1 31 2 20 0 ...

Страница 39: ...he vacuum interrupter in the fixed end pole head by turning and moving it slightly Torque M12 bolt to 60 Nm 44 ft lb and M16 bolt to 130 Nm 96 ft lb 2 9 The centering ring 28 1 has been loose and floating during installation of the vacuum interrupter Check that the movable contact is free to move axially without binding and then tighten the hardware which secures the centering ring Recheck that th...

Страница 40: ...procedure making certain of your measurements 3 8 Loosen eye bolt locking nut on insulating coupler 48 0 and retain position of the eye Make adjustments in one half turn increments After adjustment is completed tighten eye bolt locking nut to 26 34 ft lb 35 45 Nm 4 After eye bolt is tightened to proper torque repeat all measurement procedures making certain they are in agreement with values indica...

Страница 41: ...9 27 6 20 20 kA 27 6 kV VS 25008 1 200 2 000 13 15 27 6 25 25 kA 27 6 kV VS 25008 1 200 2 000 13 15 38 0 20 20 kA 38 0 kV VS 30030 1 200 2 000 2 500 18 22 38 0 25 25 kA 38 0 kV VS 30030 1 200 2 000 2 500 18 22 38 0 31 5 31 5 kA 38 0 kV VS 30041 1 200 2 000 2 500 18 22 38 0 40 40 kA 38 0 kV VS 30041 1 200 2 000 2 500 18 22 Table 7 Vacuum interrupter stroke Footnotes 1 The vacuum interrupter type de...

Страница 42: ...se Closing coil or solenoid 52SRC fails to energize No sound of circuit breaker closing 1 Secondary control circuit de energized or control circuit fuses blown Correct as indicated 2 No closing signal to multi pin plug pin A2 or contacts A2 and B3 are not engaging Check for continuity and correct protective relay logic Replace contacts if required 3 Failure of anti pump relay 52Y contacts 21 to 22...

Страница 43: ...aging Check and replace if required 5 Failure of trip coil 52T Check and replace if necessary 6 Auxiliary switch 52a NO contacts 23 to 24 or 33 to 34 are open when circuit breaker is closed Check linkage and switch Replace or adjust as necessary Tripping coil 52T energizes No tripping sound is heard and circuit breaker contacts do not open In other words they remain closed 1 Failure of tripping sp...

Страница 44: ...ithstand applicable only with circuit breaker closed 2 Standard 50 ms 3 cycle with 48 Vdc 125 Vdc or 250 Vdc trip voltage or capacitor trip with 83 ms 5 cycle interrupting time optional 3 TRV values are in accord with IEEE C37 06 2009 TRV peak value uc is roughly equal to historic E2 value in ANSI C37 06 2000 Value t3 time to voltage uc is approximately 1 1 138 times the T2 value in ANSI C37 06 20...

Страница 45: ...ve cycle ms 38 56 38 56 38 56 Dual trip coils mechanically and electrically independent Optional Optional Optional Emergency manual trip externally operable Standard Standard Standard Auxiliary voltages options Close trip and protection Vdc Vac 48 125 250 120 2403 48 125 250 120 2403 48 125 250 120 2403 Interrupting medium Vacuum Vacuum Vacuum Breaks per pole 1 1 1 Contact gap stroke Vacuum interr...

Страница 46: ...46 Table 13 Remarks ...

Страница 47: ...47 Table 13 Remarks continued ...

Страница 48: ...rther development of the products The requested performance features are binding only when they are expressly agreed upon in the concluded contract Article No E50001 F710 K376 V4 4A00 Printed in U S A 2015 Siemens Industry Inc Published by Siemens Industry Inc 2015 Siemens Industry Inc 7000 Siemens Road Wendell North Carolina 27591 For more information please contact our Customer Support Center Ph...

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