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Types SDV-R and SDV-R-AR distribution circuit breakers |

Instruction manual

Circuit breaker overhaul

Table 6 lists the recommended overhaul

schedule for type SDV-R distribution circuit

breakers operating under ANSI/IEEE “usual

service conditions” as discussed in ANSI/IEEE

C37.04 and elaborated in C37.010. When

actual operation conditions are more severe

or the circuit breaker operated more

frequently, overhaul period may coincide with

the maintenance interval in Table 3:

Maintenance and lubrication intervals on

page 36. The operations counter on the front

panel of the circuit breaker records the

number of operations.

Replacement at overhaul

The following components are replaced

during an overhaul of the circuit breaker,

when required:
• Vacuum interrupters as determined by

vacuum integrity test, contact erosion or

according to overhaul schedule (refer to

Table 6)

• Close coil, 52SRC
• Trip coil, 52T.
When these parts are changed, locking

devices must also be removed and replaced.

These include lock washers, retaining rings,

retaining clips, spring pins, cotter pins, etc.

Type

Number of

closing

operations

SDV-R

10,000

SDV-R-AR

Table 6: Overhaul schedule ANSI/

IEEE "usual conditions"

1. Vacuum interrupters must be replaced by

factory-trained personnel. Contact

Siemens medium-voltage customer

service at +1 (800) 347-6659 or +1 (919)

365-2200 outside the U.S.

2. Close coil (52SRC) and trip coil (52T).
• Remove two “push on” terminal

connections

• Remove two M4 hex-head screws and

remove solenoid.

• 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).

• The coil-mounting screws must be

installed using thread locking adhesive

(Loctite #222, Siemens part 15-133-281-

007) and primer (Loctite primer T

(#7471), Siemens part 15-133-281-005).

• Connect wires to coils with new wire

terminals (Siemens part # 15-171-600-

002).

3. Lubricate operating mechanism

according to maintenance and

lubrication information in the

maintenance section of this manual.

4. When work is complete, operate the

circuit breaker and close and open

several times, and check that all screw

connections are tight.

Hazardous voltages and high-speed moving parts.
Can cause death, serious injury, or property damage.

All replacement of circuit breaker components must be performed with

the circuit breaker completely de-energized and the springs discharged.

Overhaul

Содержание SDV-R

Страница 1: ...nd SDV R AR distribution circuit breakers usa siemens com sdv SIDS T40038 00 4AUS SDV R and SDV R AR non arc resistant and arc resistant distribution circuit breakers instruction manual Installation operation maintenance SDV R SDV R AR ...

Страница 2: ...also be familiar with the proper use of special precautionary techniques personal protective equipment insulation and shielding materials and insulated tools and test equipment Such persons are permitted to work within limited approach of exposed live parts operative at 50 volts or more and shall at a minimum be additionally trained in all of the following The skills and techniques necessary to di...

Страница 3: ...6 Inspections checks and tests 17 22 Type 3AH35 SDV R vacuum circuit breaker operator module 23 35 Maintenance 36 47 Troubleshooting 48 49 Overhaul 50 51 Disposal 52 Appendix 53 55 Note These instructions do not purport to cover all details or variations in equipment nor to provide for every possible contingency to be met in connection with installation operation or maintenance Should further info...

Страница 4: ...ng thoroughly familiar with all danger or warning notices and procedures contained herein Personnel must observe all applicable regulations e g OSHA follow all requirements of NFPA 70E and adhere to specific operating procedures applicable to the installation Use appropriate personal protective equipment PPE for the voltage and arc flash incident energy exposure Arc flash hazard and explosion haza...

Страница 5: ...s are defined as Danger Indicates an imminently hazardous situation that if not avoided will result in death or serious injury Warning Indicates a potentially hazardous situation that if not avoided could result in death or serious injury Caution Indicates a potentially hazardous situation that if not avoided may result in minor or moderate injury Notice Indicates a potentially hazardous situation...

Страница 6: ...andard for indoor ac switches 1 kV to 38 kV for use in metal enclosed switchgear ANSI IEEE C37 20 7 2017 guide for testing switchgear rated up to 52 kV for internal arcing faults The instructions included in this instruction manual are provided to aid you in obtaining longer and more economical service from your Siemens distribution circuit breaker For proper installation and operation this inform...

Страница 7: ...defined in the relevant ANSI IEEE standards All high voltage parts excluding roof bushings are completely enclosed within grounded barriers The secondary control devices and primary circuits are isolated from each other by barriers Siemens distribution circuit breakers carry a type designation as shown in Table 1 This designation may appear on drawings and familiarity with them will simplify commu...

Страница 8: ...entified by consignee prior to signing the delivery receipt can determine the outcome of any damage claim to be filed Notification to carrier within 15 days for concealed damage is essential if loss resulting from unsettled claims is to be eliminated or minimized 1 When shipment arrives note whether equipment is properly protected from the elements Note trailer number on which the equipment arrive...

Страница 9: ...an be obtained Siemens must have the above referenced documents The carrier inspection report and or driver s signature on the delivery receipt does not constitute approval to repair Note Shipments are not released from the factory without a clear bill of lading Approved methods are employed for preparation loading blocking and tarping of the equipment before it leaves the Siemens factory Any dete...

Страница 10: ...istribution circuit breakers is by means of cables connected to an overhead crane The cables are connected to the lifting lugs on the top of the type SDV R distribution circuit breaker as illustrated in Figure 2 Lifting type SDV R distribution circuit breaker with crane A crane with enough height should be used so the load angle on the lifting cable will be approximately 50 when viewed from the fr...

Страница 11: ...d height The legs must be installed and turned inward so that the two sides of the each leg are adjacent to the enclosure sides and the hole at the bottom of the leg is inside the perimeter of the enclosure as in Figure 3 Outline drawing on page 12 Use anti seize compound Loctite 77164 or 77124 nickel anti seize on the 1 2 13 SAE stainless steel cap screws used to secure the legs to facilitate rem...

Страница 12: ...9 3 237 U 99 9 2 538 D 2 0 51 J 28 5 723 P 58 4 1 484 V 149 4 3 795 E 8 0 203 K 20 6 525 Q 3 0 76 W 82 2 2 089 F 99 4 2 524 L 5 0 R 62 1 1 578 Note 1 Shown with optional cross bracing for high seismic loading and with legs installed at maximum height 28 711 mm Note 2 Unit must be installed with the arc exhaust vents at least 79 2 0 m above finished grade Dimensions in inches mm Relay and control c...

Страница 13: ...ker Dimensions in inches mm A B C F L E G H I Item 38 0 kV 1 200 A 2 000 A Item 38 0 kV 1 200 A 2 000 A Item 38 0 kV 1 200 A 2 000 A A 67 4 1 714 G 62 1 1 578 M 30 4 771 B 61 5 1 561 H 68 1 1 731 N 0 8 298 C 6 0 152 I 120 O 2 8 70 D 12 0 305 J 30 7 781 P 8 0 203 E 30 7 781 K 0 4 9 Q 5 3 134 F 6 4 163 L 16 9 430 R 90 I J M Q P 0 N K D R ...

Страница 14: ... Check that the protective relay panel if so equipped clears any additional wiring installed A conduit panel opening is provided in the bottom of the relay and control compartment for the connection of control circuits The control wires should be run separately from high voltage wiring to prevent inductive coupling between them and should be sized for full operating current to avoid a drop in volt...

Страница 15: ...nd control compartment Hazardous voltages Will cause death serious injury or property damage Do not operate current transformers with the secondary open circuited Current transformers must be either connected to a load or short circuited Current transformer secondary circuits also must be grounded Phase barriers Phase barriers are provided on all type SDV R distribution circuit breakers as shown i...

Страница 16: ...rcuit breaker with interphase barriers and bushing current transformers installed in primary compartment A A A Item Description A Bushing current transformer one per bushing shown B Phase barriers C Relay and control compartment D Operator compartment E High voltage compartment A E B D C B B A B B B B 1 3 5 2 4 6 C ...

Страница 17: ...reaker with stored energy operator on page 18 presents the location of this disconnect in a standard type SDV R or SDV R AR distribution circuit breaker The control power disconnect device is normally a fused knife switch However in some outdoor circuit breakers a molded case circuit breaker or pullout type fuse holder may be used in lieu of the fused knife switch Opening the fused knife switch or...

Страница 18: ... 3 5 Item Description A External manual trip B Control disconnect device C Relay and control compartment shown with relay swing panel open and closed D Operator compartment E Push to trip pushbutton F Push to close pushbutton G Operations counter H OPEN CLOSE indicator I CHARGED DISCHARGED indicator J Opening for manual charging K Reset mechanism for external manual trip H G J F C D I B E C A K ...

Страница 19: ...urce has not been connected to the circuit breaker Refer to the specific wiring information and rating label for your circuit breaker to determine the voltage required and where the control voltage signal should be applied When control power is connected to the circuit breaker the closing springs should automatically charge if the control power disconnect is closed 1 Close the control power discon...

Страница 20: ...ergization Inspection Check the following points 1 Make a final mechanical inspection of the circuit breaker Verify the contacts are in the OPEN position and the closing springs are DISCHARGED 2 Confirm the circuit breaker is properly set up and reasonably level on its foundation and appropriately anchored to the foundation 3 Check the tightness of all hardware on the cabinet adjustable legs bushi...

Страница 21: ... the vacuum interrupter will also be verified If these levels cannot be sustained and there is no other source for the failure the vacuum interrupter must be replaced High potential tests employ hazardous voltages Will cause death or serious injury Follow safe procedures exclude unnecessary personnel and use safety barriers Keep away from circuit breaker during application of test voltages After t...

Страница 22: ...atisfactory operation of all instruments during the first week of operation Rated maximum voltage Rated power frequency withstand Field test voltage kV rms kV rms kV rms kV dc 38 0 80 60 85 Table 2 High potential test voltages Note The dc test voltage is given as a reference only It represents values believed to be appropriate and approximately equivalent to the corresponding power frequency withs...

Страница 23: ...d switch contact pressure spring 20 0 Support insulators 21 0 Opening spring 23 0 Mechanism housing 27 0 Vacuum circuit breaker flexible current link 28 0 Ground switch flexible current link Figure 9 Operator panel controls of the circuit breaker and manual charging of closing spring Item Description 51 0 Manual spring charging port 52 0 Close pushbutton 53 0 Open pushbutton 54 0 CHARGED DISCHARGE...

Страница 24: ...able contact preventing loss of vacuum while permitting motion of the movable contact along the axis of the vacuum interrupter When the two contacts separate an arc is initiated that continues conduction up to the next current zero At current zero the arc extinguishes and any conductive metal vapor that has been created by and supported the arc condenses on the contacts and on the surrounding arc ...

Страница 25: ...e same direction This configuration operates in such a way that as the circuit breaker closes after a close command is initiated the ground switch opens at the same time or vice versa when an open command is initiated Stored energy operating mechanism The stored energy operating mechanism of the operator is an integrated arrangement of springs coils and mechanical devices designed to provide a num...

Страница 26: ...shafts phase A 78 0 Shock absorber 60 0 Lever 68 3 Extension shafts phase C 79 0 Closing spring 61 0 Auxiliary switch 69 0 Charging shaft 80 0 Trip coil 52T 62 0 Auxiliary switch link 70 0 Crank 81 0 Pawl roller 63 0 Charging mechanism gear box 71 0 Lever 82 0 Close latch pawl 64 0 Control lever 73 0 Linkage 83 0 Trip latch pawl 65 0 Driver lever 74 0 Spring charging motor 88 66 0 Charging flange ...

Страница 27: ...en the energy stored in the opening and contact pressure springs is released by pawl 83 0 The residual force of the opening spring 21 0 maintains the moving contacts in the open position In the circuit breaker open state the circuit breaker vacuum interrupter contacts are held open but the ground switch contacts are closed and the necessary contact pressure to the ground switch contacts is maintai...

Страница 28: ...17 Stored energy operating mechanism shown in OPEN position on page 30 The charging shaft is supported in the charging mechanism gear box 63 0 but is not coupled mechanically with the charging mechanism Fitted to it are the crank 70 0 at one end and the cam 59 0 together with lever 60 0 at the other When the charging mechanism is actuated by hand with a hand crank refer to Figure 15 Use of manual ...

Страница 29: ... the closing spring to recharge immediately Trip free function for circuit breaker For the circuit breaker the trip free function is accomplished by blocking the movement of the close latch pawl 82 0 when the manual trip pushbutton is actuated The trip free function is in accordance with ANSI IEEE C37 04 Opening Refer to details shown in Figure 17 Stored energy operating mechanism shown in OPEN po...

Страница 30: ... is discharged Before the spring charge motor has recharged the closing spring and opened 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 recharg...

Страница 31: ...wn in OPEN position on page 30 The opening spring 21 0 is charged during closing To open the circuit breaker press the open pushbutton 53 0 and OPEN will be displayed by indicator 55 0 The schematic shown in Figure 18 Typical elementary diagram on page 32 is intended to aid in understanding the mechanism operation discussed in this instruction manual Refer to the schematic diagram furnished with y...

Страница 32: ...sing spring release coil 52T Opening 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 discharg...

Страница 33: ...19 Construction of secondary shunt release shown charged A secondary shunt release extra trip coil 3AX1101 is used for electrical opening of the circuit breaker by protective relays or manual control devices when more than one trip coil is required The second trip coil is generally connected to a separate auxiliary supply dc or ac from the control supply used for the normal trip coil An alternate ...

Страница 34: ... 0 is supported by a partly milled locking pin 21 0 pivoted in the cover sheets of the magnet armature 9 0 The armature 9 0 is pivoted in front of the poles of the U shaped magnet core 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 armat...

Страница 35: ...ge capacitor to the peak of the converted wave refer to Figure 22 Capacitor trip device Shock absorber Circuit breakers are equipped with a hydraulic shock absorber 78 0 refer to Figure 17 Stored energy operating mechanism shown in OPEN position on page 30 The purpose of this shock absorber is to limit overtravel and rebound of the vacuum interrupter movable contacts during the conclusion of an op...

Страница 36: ...nditions maintenance and lubrication is recommended at five year intervals or at the number of operations indicated in Table 3 Maintenance and lubrication intervals whichever occurs first Usual and unusual service conditions for outdoor medium voltage circuit breakers are defined in ANSI IEEE C37 04 and ANSI IEEE C37 010 Generally usual service conditions are defined as an environment in which the...

Страница 37: ...ed and exercised annually For the safety of maintenance personnel as well as others who might be exposed to hazards associated with maintenance activities the safety related work practices of NFPA 70E especially chapter 1 should always be followed when working on electrical equipment Maintenance personnel should be trained in the safety practices procedures and requirements that pertain to their r...

Страница 38: ... of tasks 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 not covered sufficiently for the Purchaser s purposes the matter should be referred to Siemens at 1 800 333 7421 or 1 423 262 5700 outside the U S N...

Страница 39: ...r path consists of the vacuum interrupters the fixed end and moving end connections to the enclosure bus system and the roof mounted bushings These components must be checked for cleanliness and condition The vacuum interrupters must also be checked for vacuum integrity Check torque of the bolts that secure the roof bushings to the top plate of the circuit breaker Torque should be in the range of ...

Страница 40: ...rgent as a cleaning agent Dry thoroughly using a dry lint free cloth Also inspect the bus work for any evidence of loose bolts bushings for any evidence of damage and flexible connectors for tightness and absence of mechanical damage burning or pitting Checks of the stored energy operator mechanism The stored energy operator checks are divided into mechanical and electrical checks for simplicity a...

Страница 41: ...uction details The 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 al...

Страница 42: ...he contact erosion check procedure is Be sure the circuit breaker primary contacts are closed Observe the white contact erosion mark refer to Figure 17 on 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 viewing the contact erosion mark on each vacuum interrupter 4 Press the Open red pushbutt...

Страница 43: ... Interlocks must be in operation at all times Read instruction manual observe safety instructions and use qualified personnel Electrical close and 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 ...

Страница 44: ...e numbers of interruptions and magnitude of current interrupted The vacuum interrupter contact life curve Figure 26 VSG VSS40 0 40 A1 electrical contact life is offered as a guide to expected life High potential tests employ hazardous voltages Will cause death and serious injury Follow safe procedures exclude unnecessary personnel and use safety barriers Keep away from the circuit breaker during a...

Страница 45: ...o not use dc high potential testers incorporating half wave rectification Such devices produce high peak voltages These high voltages will produce X ray radiation Such devices also show erroneous readings of leakage current when testing vacuum circuit breakers Note This test includes not only the vacuum interrupter but also the other insulation components in parallel with the vacuum interrupter Th...

Страница 46: ...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 enclosure 12 Starting with zero voltage gradually increase the test voltage to 1 500 volts rms 60 Hz Maintain test voltage for one minute 13 If no disruptive discharge occurs the secondary control insulation level is satisfactory 14 Disco...

Страница 47: ...n the barriers and other insulation on the circuit breaker Protective relays and instruments The type SDV R distribution circuit breaker can be equipped with a protective relay package supplied on a hinged panel mounted in the front of the relay and control compartment To ensure satisfactory operation of protective relays and instruments do not leave device covers off longer than necessary When a ...

Страница 48: ...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 1 800 333 7421 or 1 423 262 5700 outside the U S Closing springs charge but circuit breaker does not close Closing coil or solenoid 52SRC fails to energize No sound of circuit breaker closing 1 Secondary control circuit de e...

Страница 49: ...ect as indicated 2 Damage to wiring terminals or connectors Check and repair as necessary 3 No tripping signal to multi pin plug contact C2 Check for continuity and correct protective relay logic 4 Secondary multi pin plug contacts C2 or D2 are not engaging 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 3...

Страница 50: ...ing operations SDV R 10 000 SDV R AR Table 6 Overhaul schedule ANSI IEEE usual conditions 1 Vacuum interrupters must be replaced by factory trained personnel Contact Siemens medium voltage customer service at 1 800 347 6659 or 1 919 365 2200 outside the U S 2 Close coil 52SRC and trip coil 52T Remove two push on terminal connections Remove two M4 hex head screws and remove solenoid Install replace...

Страница 51: ...hould be examined for evidence of leaking If evidence of fluid leakage is found the shock absorber must be replaced to prevent damage to the vacuum interrupter bellows After and internal arcing fault In the unlikely event of an internal arcing fault de energize and isolate all primary and secondary circuits before performing any inspections Contact Siemens medium voltage customer service at 1 800 ...

Страница 52: ...d via a recycling company Disposal regulations vary from locality to locality and may be modified over time Specific regulations and guidelines should be verified at the time of waste processing to ensure that current requirements are being fulfilled For specific assistance in understanding and applying regional regulations and policies or manufacturer s recommendations refer to the local Siemens ...

Страница 53: ... time current 12 5 kA Grounding switch rated closing and latching current 32 5 kA Addtional key ratings for SDV R AR Rated accessibility type 2B Rated internal arcing short circuit current 25 31 5 or 40 kA Rated arcing duration 0 5 s Table 8 Control data Stored energy operator Nominal Range Close coil Trip coil1 6 Spring charging motor Close Trip A A Amperes run avg Charging seconds 125 Vdc 90 140...

Страница 54: ...artment 1001 Operator compartment stored energy operator for application below 30 C down to 50 C 1502 Table 11 Space heater data Footnotes 1 Thermostat controlled and set to turn off at 95 F 2 Thermostat controlled and set to turn off at 10 F Voltage Interrupting Continuous current 1 200 A1 2 2 000 A1 2 Pallet Seismic cross braces 38 0 kV 25 31 5 40 kA 5 030 2 282 5 525 2 506 150 68 177 77 Table 1...

Страница 55: ...nd latching current kA peak 65 82 104 Rated duty cycle Reclosing duty Non reclosing duty O 0 3 s CO 15 s CO Minimum reclosing time2 s 0 3 Rated power frequency Hz 60 Capacitance switching Overhead line A 100 Phase spacing bushing center to center inches mm 19 5 495 External creep inches mm 41 0 1 040 External strike to ground inches mm 17 480 Operating temperature range3 Standard Optional C 30 to ...

Страница 56: ...nt is based on an actual case or on as designed parameters and therefore should not be relied upon for any specific application and does not constitute a performance guarantee for any projects Actual results are dependent on variable conditions Accordingly Siemens does not make representations warranties or assurances as to the accuracy currency or completeness of the content contained herein If r...

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