Siemens SDV7 Instruction Manual
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Siemens SDV7 Instruction Manual

Non-arc-resistant distribution circuit breaker
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Instruction manual
Type SDV7 non-arc-resistant distribution circuit breaker
Installation operation maintenance E50001-F710-K377-V6-4A00
www.usa.siemens.com/sdv7

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  • Page 1 Instruction manual Type SDV7 non-arc-resistant distribution circuit breaker Installation operation maintenance E50001-F710-K377-V6-4A00 www.usa.siemens.com/sdv7...
  • Page 2 In addition, this person has the following purchased. Siemens reserves the right to make changes in the qualifications: specifications shown herein or to make improvements at any Is trained and authorized to time without notice or obligation.

  • Page 3: Table Of Contents

    Instrument transformers 15 – 16 The contents of this instruction manual shall Installation of type SDV7-SE distribution circuit breaker not become part of or modify any prior or with stored-energy operator 17 – 24...

  • Page 4: Introduction

    Introduction Arc flash hazard and hazardous voltages. Will cause death, serious injury or property damage. Always de-energize and ground the equipment before maintenance. Read and understand this instruction manual before using equipment. 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 which will cause death, severe injury or equipment damage.
  • Page 5 Introduction Field service operation and warranty The type SDV7 distribution circuit breaker is issues designed to meet all applicable ANSI, NEMA Siemens can provide competent, well-trained and IEEE standards. Successful application field service representatives to provide and operation of this equipment depends as...

  • Page 6: General Description

    SDV7 distribution circuit breaker using vacuum interrupters. The equipment designs described in this instruction manual consists Figure 1: Typical type SDV7 distribution circuit breaker of free-standing outdoor distribution circuit breakers for application up to 38 kV. A typical type SDV7 distribution circuit breaker is...
  • Page 7 Table 1: Type SDV7 distribution circuit SDV7 distribution circuit breaker must be breaker designations. This designation may checked. Failure on the part of the user to...

  • Page 8: Receiving, Handling And Storage

    Receiving, handling and storage Receiving 1. When shipment arrives, note whether Each type SDV7 distribution circuit breaker is equipment is properly protected from the securely blocked and braced for shipment. It elements. Note trailer number on which is crated, boxed or covered as required by the equipment arrived.
  • Page 9 If inspection their agent, Siemens cannot be held liable for concealed damage is not practical at for repairs. Siemens will not be held liable the time the carrier’s inspector is present, for repairs in any case where repair work...
  • Page 10 Storage ~60° Verify the forklift blades pass completely When it is necessary to store a type SDV7 through the wooden skid under the circuit distribution circuit breaker in an area breaker. exposed to the weather or under humid...

  • Page 11: Installation

    Corporation. relatively level surface be provided capable legs to facilitate removal of the legs should of supporting the weight of the type SDV7 it be required in the future. distribution circuit breaker, and 0.75 inch diameter anchor bolts are recommended.
  • Page 12 Figure 3: Outline drawing 2-4-6 1-3-5 Note 1: Shown with High-voltage optional cross-bracing compartment for high-seismic loading, and with legs installed at maximum height 28" (711 mm). Dimensions in inches (mm) Operator Relay and compartment control Ground compartment pads on diagonally opposite corners...
  • Page 13 Figure 4: Anchoring type SDV7 distribution circuit breaker Dimensions in inches (mm) 15.5 kV 27.6 kV 38.0 kV 15.5 kV Item 1,200 A- 1,200 A- 1,200 A- 3,000 A 2,000 A 2,000 A 2,500 A 47.1 (1,196) 56.5 (1,435) 56.5 (1,435) 67.8 (1,722)

  • Page 14: Electrical Connections

    The control wires should be run operating current of the circuit and within separately from high-voltage wiring to the rating of the type SDV7 distribution prevent inductive coupling between them circuit breaker. Connections are to be made and should be sized for full operating...

  • Page 15: Instrument Transformers

    Figure 5: Type SDV7 distribution circuit Phase barriers are provided on all 27.6 kV breaker with interphase barriers and and 38 kV class type SDV7 distribution bushing current transformers installed in circuit breakers as shown in Type SDV7 primary compartment on page 16 illustrates...
  • Page 16 Figure 5: Type SDV7 distribution circuit breaker with interphase barriers and bushing current transformers installed in primary compartment 2-4-6 1-3-5 Bushings Vacuum Bushings 2-4-6 interrupter 1-3-5 X1 X2 X3 X4 X5 X1 X2 X3 X4 X5 X5 X4 X3 X2 X1...
  • Page 17 This section provides a description of the circuit breaker inspections, checks and tests to perform on To de-energize the control power, open the the type SDV7-SE distribution circuit breaker disconnect device in the relay and control prior to operation. compartment. Figure 6: Relay and control...

  • Page 18: With Stored-Energy Operator

    Spring discharge check (refer to Figure 6: Relay and control and operator compartments for type SDV7-SE circuit breaker with stored-energy operator on page 19) 1. De-energize control power. 2. Press red open button on the operating mechanism.
  • Page 19 Figure 6: Relay and control and operator compartments for type SDV7-SE circuit breaker with stored-energy operator 2-4-6 1-3-5 Item Description External manual trip Control disconnect device Relay and control compartment Operator compartment Push-to-trip pushbutton Push-to-close pushbutton Operations counter OPEN/CLOSE indicator...
  • Page 20 Figure 6: Relay 2. Repeat the spring discharge check and control and operator compartments presented on page 18. for type SDV7-SE circuit breaker with stored-energy operator on page 19. 3. Verify the springs are DISCHARGED and the circuit breaker primary contacts are 3.
  • Page 21 Figure 6: Relay protective relays and protection devices and control and operator compartments on the system. Refer to protective relay for type SDV7-SE circuit breaker with instructions before making any stored-energy operator on page 19. adjustments.
  • Page 22 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 test completion, ground both ends and the middle ring (if visible) of the vacuum interrupter to dissipate any static charges.
  • Page 23 Table 2: High-potential test voltages Rated power-frequency Rated maximum voltage Field-test voltage withstand kV (rms) kV (rms) kV (rms) kV dc 15.5 37.5 27.6 38.0 Note: The dc test voltage is given as a 3. Charge the closing springs manually and reference only.
  • Page 24 2. Check torque of the bolts that secure the roof bushings to the top plate of the type SDV7 distribution circuit breaker. Torque should be in the range of 20-25 ft-lbs (27-34 Nm). 3. Connect primary incoming power source to circuit breaker.

  • Page 25: With Magnetic-Actuator Operator

    SDV7-MA circuit breaker with magnetic- control power actuator operator presents the location of Type SDV7-MA vacuum circuit breakers are this disconnect in a standard type SDV7-MA normally shipped with the primary contacts distribution circuit breaker on page 30. open and the springs discharged. However,...
  • Page 26 Opening the knife switch NOTICE de-energizes control power to the circuit breaker. In some Capacitor discharge plug (105.2) circuit breakers, pullout type fuse holders or molded-case Disconnect control power prior to removing or replacing the capacitor discharge plug. Refer to Figure 7. circuit breakers are used in To discharge capacitors: lieu of knife switches.
  • Page 27 Discharging capacitors Automatic capacitor charging After control power has been removed, The controller board (105.0) executes a self- discharge stored energy from the capacitors test of the capacitors (106.2) and checks the (refer to Figure 7: Operator controls and status of the capacitors (106.2). This self-test discharging capacitors.
  • Page 28 As-found and vacuum-integrity check 3. In step 2, when the close pushbutton was tests pressed, the circuit breaker should have Perform and record the results of both the as- closed, and the capacitors should have found insulation test and the vacuum- recharged automatically.
  • Page 29 (refer to Figure e) Press red Open pushbutton (54.0) 8: Relay and control and operator again. compartments for type SDV7-MA circuit f) Verify main contact status indicator breaker with magnetic-actuator operator shows OPEN. on page 30) to open the circuit breaker.
  • Page 30 Figure 8: Relay and control and operator compartments for type SDV7-MA-AR circuit breaker with magnetic-actuator operator 2-4-6 1-3-5 Item Description External manual trip Control disconnect device Relay and control compartment closed Relay and control compartment open Operator compartment Push-to-trip pushbutton...
  • Page 31 Inspection NOTICE Check the following points: 1. Make a final mechanical inspection of the Shipping bracing and tag between phase barriers circuit breaker. Verify the contacts are in (on units so equipped) may damage circuit the OPEN position. breaker. 2. Confirm the circuit breaker is properly set May result in damage to equipment.
  • Page 32 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 test completion, ground both ends and the middle ring (if visible) of the vacuum interrupter to dissipate any static charges.
  • Page 33 Table 3: High-potential test voltages Rated Rated power-frequency Field-test voltage maximum voltage withstand kV (rms) kV (rms) kV (rms) kV dc 15.5 37.5 27.6 38.0 Note: The dc test voltage is given as a 3. Energize the control circuits. For reference only.
  • Page 34 2. Check torque of the bolts that secure the roof bushings to the top plate of the type SDV7 distribution circuit breaker. Torque should be in the range of 20-25 ft-lbs (27- 34 Nm). 3. Connect primary incoming power source to circuit breaker.

  • Page 35: Maintenance

    SDV7 distribution circuit breaker. activities, the safety-related work practices of NFPA 70E (especially chapter 1) should When type SDV7 distribution circuit breakers always be followed when working on are operated under “usual service conditions,”...
  • Page 36 Recommended hand tools SAE (U.S. customary): Type SDV7 distribution circuit breakers uses Socket and open-end wrenches: both standard SAE (U.S. customary) and 5/16, 3/8, 7/16, 1/2, 9/16, 11/16, 3/4 and metric fasteners. Metric fasteners are used for 7/8 inches; 7, 10, 13, 17 and 19 mm the vacuum interrupters and in the vacuum interrupter/operator module.
  • Page 37 Maintenance and lubrication instruction manual or in the maintenance Fastener check section of the operator instruction manuals: Capacitor charging check Type SDV7-SE circuit breaker type 3AH35- Contact-erosion check SE stored-energy operator, E50001-F710- Stored-energy operator-mechanism checks K376-X-XXXX Maintenance and lubrication...
  • Page 38 De-energize the control power to the circuit Figure 7 on page 26. breaker. To discharge capacitors: For the type SDV7-SE circuit breaker with Disconnect control power to the circuit breaker stored-energy operator by opening the disconnect device (device 08 in...
  • Page 39 Use anti-seize compound (Loctite* 77164 or 77124 nickel anti-seize) on the threads of Figure 9: Side view of type SDV7 distribution circuit breaker the roof studs to facilitate future removal of All of these components must be cleaned and a bushing should it become necessary.
  • Page 40 High-potential test voltages If dc high-potential tests are used, note the *Megger is a registered The voltages for high-potential tests are following: trademark of Megger shown in Table 2 (or 3): High-potential test Group, Ltd. If a dc test indicates loss of vacuum, voltages on page 23 (or 33).
  • Page 41 2. Remove the phase barriers (if provided) as 9. Disconnect the shorting wire and reattach shown in Figure 5: Type SDV7 distribution the leads to the spring-charging motor. circuit breaker with interphase barriers and bushing current transformers installed in primary compartment on page 16.
  • Page 42 Protective relays and instruments NOTICE The type SDV7 distribution circuit breaker can be equipped with a protective relay panel Risk of insulation damage with use of incorrect when required. A protective relay package can compounds. be supplied on a hinged panel mounted in the front of the relay and control May cause equipment dielectric failure.

  • Page 43: Maintenance And Troubleshooting

    SDV7-SE 10,000 section, provide maintenance personnel with SDV7-MA a guide to identifying and correcting possible malfunctions of the type SDV7 distribution Table 7: Overhaul schedule ANSI/IEEE "usual circuit breaker. conditions" Circuit breaker overhaul Table 7: lists the recommended overhaul schedule for type SDV7 distribution circuit breakers operating under ANSI/IEEE “usual...
  • Page 44 Table 8: Periodic maintenance and lubrication tasks Sub-assembly Item Inspect for 1. Cleanliness. 2. Contact erosion. Note: Perform with manual-spring checks. Vacuum interrupter 3. Vacuum integrity. Primary power path Note: Perform with high-potential tests. 1. Record contact resistance with contacts Vacuum interrupter contact resistance closed and check at each maintenance interval to monitor condition.
  • Page 45 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 Circuit breaker fails to close.
  • Page 46 Nuisance or false close if problems are in wiring or coil. Correct as required. 1. Mechanical failure of operating mechanism. Check and contact the factory or Siemens Mechanical problem field service at +1 (800) 347-6659 or +1 (919) 365-2200 outside the U.S.
  • Page 47 Ordering replacement parts When ordering replacement parts for a Siemens distribution circuit breaker, it is very important to give complete information. This information should include: 1. Type SDV7 distribution circuit breaker serial number listed on circuit breaker nameplate. 2. Type of operator listed on operator nameplate.

  • Page 48: Appendix

    Lightning time to Power voltage short-time time current delay time latching breaker impulse peak voltage frequency current current type SDV7 (BIL) value kV, rms kA, rms ms/cycles A, rms μs kA, peak 1,200, 15.5-20 15.5 110/142 50/3 29.2 2,000 1,200, 15.5-25...
  • Page 49 Non-inductive circuit interrupting capacity in A 20 VA (ac). Circuit breaker auxiliary switch Inductive circuit interrupting capacity in A Table 13: Type SDV7 distribution circuit breaker weight in lbs (kg) Footnotes: Continuous current Weight does not include shipping Voltage Interrupting Seismic pallet.
  • Page 50 Table 15: 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 closing and latching current kA peak...
  • Page 51 Figure 10: Typical control schematic for stored-energy operator Legend Schematic shown with closing Green indicating light (remote) springs discharged and circuit Red indicating light (remote) 01/C Control switch close (remote) breaker open. Closing spring position switch, closed 01/T Control switch trip (remote) when closing spring is discharged Close and trip power disconnect Closing spring position switch, open...
  • Page 52 Figure 11: Typical control schematic for magnetic-actuator operator Legend: 01/C Control switch close (remote) Green indicating light (remote) 01/T Control switch trip (remote) Red indicating light (remote) Power disconnect Emergency trip status 08C/T Close/open power disconnect (optional) White indicating light (remote) Auxiliary switch, open when circuit Plug connector (operator connections) breaker is open...
  • Page 53 Figure 12: Controller schematic for magnetic-actuator operator Electronic 64-pin controller plug (XO) Ground Power Filter supply +24 Vdc Green LED (N.O.) Yellow LED (N.O.) Red LED (alarm) (N.C.) Circuit breaker CLOSED (N.O) Circuit breaker OPEN (N.O) Common +160 Vdc +160 Vdc Ground Ground Discharge...
  • Page 54 Table 16: Remarks...
  • Page 55 Table 16: Remarks (continued)
  • Page 56 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-K377-V6-4A00 our Customer Support Center.

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