Siemens SDV7 Instruction Manual

Text of Siemens SDV7 User Guide:

• Siemens SDV7, 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. 3. Type of circuit breaker. 4. Rated continuous current of circuit breaker. 5. Rated voltage of circuit breaker. 6. Description of part. Use instruction book description insofar as possible. 7. Instruction book number listed on circuit breaker nameplate. 8. Instruction book item number. 9. Number of pieces required.

• Siemens SDV7, 34 Placing equipment into service To place equipment in service for the first time proceed as follows: 1. Check that the circuit breaker is OPEN and all control circuits are energized. 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. 4. Check all instruments, protective relays, meters, etc. 5. Connect as small a load as possible and observe instruments. 6. Gradually connect more load to the

• Siemens SDV7, 4 Arc flash hazard, hazardous voltages and high-speed moving parts. Will cause death, serious injury or property damage. To avoid arc flash burns, electrical shock and entanglement in moving parts, only qualified personnel should work on or around this equipment after becoming 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 oper

• Siemens SDV7, 28 As-found and vacuum-integrity check tests Perform and record the results of both the as- found insulation test and the vacuum- integrity check (dielectric) test. Procedures for these tests are described in the Maintenance section of this instruction manual beginning on page 35. Capacitor charging check The capacitor charging system of the circuit breaker must be checked. Control power is required for capacitor charging. Note: A temporary source of control power and test leads may be required if the control power source has not been connected to the circuit breaker. Refer to the specific wiring information and rating label for your circuit breake

• Siemens SDV7, Subject to changes and errors. The information given in thisdocument only contains general descriptions and/or performance features which may not always specifically reflect those described, or which may undergo modification in the course of further 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-K377-V6-4A00 Printed in U.S.A. © 2016 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 Cust

• Siemens SDV7, 17 Installation of type SDV7-SE circuit breaker with stored- energy operator Hazardous voltages and high speed moving parts. Will cause death, serious injury or property damage. Read instruction manuals, observe safety instructions and use qualified personnel. Introduction This section provides a description of the inspections, checks and tests to perform on the type SDV7-SE distribution circuit breaker prior to operation. Inspections, checks and tests without control power Type SDV7-SE vacuum circuit breakers are normally shipped with the primary contacts open and the springs discharged. How

• Siemens SDV7, Important The information contained herein is general in nature and not intended for specific application purposes. It does not relieve the user of responsibility to use sound practices in application, installation, operation and maintenance of the equipment purchased. Siemens reserves the right to make changes in the specifications shown herein or to make improvements at any time without notice or obligation. Should a conflict arise between the general information contained in this publication and the cont

• Siemens SDV7, 52 Figure 11: Typical control schematic for magnetic-actuator operator 4 1 1 52a and 52b spare contacts (standard) CLOSE/OPEN power Power Electronic controller Electronic controller Electronic controller Electronic controller Power input Power supplyt Filter CLOSE command OPEN command Status Footnotes 1 and 2 Footnote 3 Footnote 3 Footnotes 1 and 2 Footnotes: 1. Use this connection when high-range electronic controller power supply specified and high-range binary input (commands) specified. Input to close and trip (commands) circuits ≥ 68 Vac or 68 Vdc. 2. Use this connection when low-range electronic controller power supply specified and low-rang

• Siemens SDV7, 35 Maintenance Inspection and maintenance intervals Periodic inspections and maintenance are essential to obtain safe and reliable operation of the type SDV7 distribution circuit breaker. When type SDV7 distribution circuit breakers are operated under “usual service conditions,” maintenance and lubrication is recommended at five-year intervals or at the number of operations indicated in Table 5: Maintenance and lubrication intervals on page 39, whichever occurs first. “Usual” and “unusual” service conditions for ac high-voltage circuit breakers are defined in ANSI/IEEE C37.04, section 4 and ANSI/IEEE

• Siemens SDV7, 33 Rated maximum voltage Rated power-frequency withstand Field-test voltage kV (rms) kV (rms) kV (rms) kV dc 15.5 50 37.5 53 27.6 60 45 64 38.0 80 60 85 Table 3: 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 withstand test values specified for each voltage rating. The presence of this column in no way implies any requirement for a dc withstand test on ac equipment or that a dc withstand test represents an acceptable alternative to ac withstan

• Siemens SDV7, 6 General description Introduction Siemens type SDV7 distribution circuit breaker is precision built equipment designed to function efficiently under normal operating conditions. It is designed and manufactured to operate within the parameters established in ANSI/IEEE C37 and NEMA standards for distribution circuit breakers. Performance requirements of these standards have been met or exceeded by these designs. Specific standards which apply include: ANSI/IEEE C37.04-1999 rating structure for ac high-voltage circuit breakers ANSI/IEEE C37.06-2009 preferred ratings ac high-voltage

• Siemens SDV7, 53 Figure 12: Controller schematic for magnetic-actuator operator Ground Electronic controller Filter 64-pin plug (XO) +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 Discharge Coil Sense coil Magnetic actuator OPEN CLOSED Mechanical lockout Magnetic-actuator coil Unused Magnetic-actuator coil OPEN position switch CLOSED position switch +24 Vdc +24 Vdc Unused OPEN pushbutton CLOSE pushbutton Sense coil Sense coil CLOSE command CLOSE

• Siemens SDV7, 31 Inspection Check the following points: 1. Make a final mechanical inspection of the circuit breaker. Verify the contacts are in the OPEN position. 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, bushings, bus bars and operator mechanism. 4. Verify that the operating mechanism has been properly lubricated. 5. Blocking, supports and other temporary ties remove fro

• Siemens SDV7, 11 Preparation for installation Prior to installation of the type SDV7 distribution circuit breaker, careful design, planning and construction of the foundation or base on which the circuit breaker will rest must be made. A thorough analysis and careful construction may alleviate many problems at the time of installation, and during operation. It is important that a relatively level surface be provided capable of supporting the weight of the type SDV7 distribution circuit breaker, and 0.75 inch diameter anchor bolts a

• 42 Risk of insulation damage with use of incorrect compounds. May cause equipment dielectric failure. Use only isopropyl alcohol to clean insulation. Do not use any cleaning compounds containing chlorinated hydrocarbons such as trichlorethylene, perchlorethylene or carbon tetrachloride. These compounds will damage the material used in the barriers and other insulation on the circui

• Siemens SDV7, 46 Table 9: Troubleshooting (continued) Problem Symptoms Possible causes and remedies Nuisance or false close Electrical problem 1. Nuisance or false closing signal to secondary disconnect multi-pin plug contact. Check protective relay logic. Correct as required. 2. (Stored-energy) closing coil (52SRC) terminal A2 is shorted-to-ground. Check to determine if problems are in wiring or coil. Correct as required. Mechanical problem 1. 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. Circuit breaker will not trip (Sto

• 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 Item Description A Bushing current transformer (one per bushing shown) B Phase barriers apply only in 27.6 kV and 38 kV C Relay and control compartment D Operator compartment E High-voltage compartment X1 X2 X3 X4 X5 X1 X2 X3 X

• 13 Figure 4: Anchoring type SDV7 distribution circuit breaker Item 15.5 kV 1,200 A- 2,000 A 15.5 kV 3,000 A 27.6 kV 1,200 A- 2,000 A 38.0 kV 1,200 A- 2,500 A A 47.1 (1,196) 56.5 (1,435) 56.5 (1,435) 67.8 (1,722) B 42.7 (1,085) 52.0 (1,321) 52.0 (1,321) 63.1 (1,603) C 6.0 (152) 6.0 (152) 6.0 (152) 6.0 (152) D 12.0 (305) 12.0 (305) 12.0 (305) 12.0 (305) E 21.3 (541) 26.0 (660) 26.0 (6

• Siemens SDV7, 24 Placing equipment into service To place equipment in service for the first time proceed as follows: 1. Check that the circuit breaker is OPEN and all control circuits are energized. 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. 4. Check all instruments, protective relays, meters, etc. 5. Connect as small a load as possible and observe instruments. 6. Gradually connect more load to the equipment while observing instruments unt

• Siemens SDV7, 22 1. An insulation resistance test is advisable on the control circuit to verify that all connections made in the field are properly insulated. 2. A dielectric test, if possible, should be made on the high-voltage circuit for one minute at the voltages corresponding to the rated voltage of the equipment. The voltage should be raised gradually and the circuit under test should sustain the voltage for one minute. When the test is performed with the circuit breaker open, the integrity of the vacuum interrupter will also be verified. If these levels cannot be sustaine

• Siemens SDV7, 41 Insulation and contact-resistance test procedure 1. Observe safety precautions listed in the danger and caution advisories for the vacuum integrity check tests. 2. Close the circuit breaker. Ground each pole not under test. Use manual charging, closing and tripping procedures. 3. Apply the proper high-potential test voltage (refer to Table 2 (or 3): High- potential test voltages on page 23 (or 33) between a primary conductor of the pole and ground for one minute. 4. If no disruptive discharge occurs, the insulation system is satisfactory. 5. A

• Siemens SDV7, 27 Discharging capacitors After control power has been removed, discharge stored energy from the capacitors (refer to Figure 7: Operator controls and discharging capacitors. 1. Press red Open pushbutton (54.0). 2. Remove the mechanism housing cover sheet (60.1). 3. Discharge the capacitors (106.2) by unplugging the connector (105.2) from the controller board (105.0). Do not unplug connector (106.3) from the capacitor boards, or damage to the capacitor board or the controller board may occur. The red LED (106.4) on each of the capacitor boards (106.1) indicates the

• 48 Appendix Table 10: Technical ratings Circuit breaker type SDV7 Rated maximum voltage Rated withstand voltages Rated short- circuit and short-time current Rated interrupting time 1 Rated continuous current Rated transient recovery voltage 2 Rated permissible tripping delay time Y Rated closing and latching current Lightning impulse (BIL) P

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