VA 26 13 00-2010 MEDIUM-VOLTAGE SWITCHGEAR.pdf

1、09-10 26 13 00 - 1 SECTION 26 13 00 MEDIUM-VOLTAGE SWITCHGEAR SPEC WRITER NOTE: Delete between /-/ if not applicable to project. Also delete any other item or paragraph not applicable in the section and renumber the paragraphs. PART 1 - GENERAL 1.1 DESCRIPTION This section specifies the furnishing,

2、installation, connection and testing of the medium voltage switchgear. 1.2 RELATED WORK A. Section 09 06 00, SCHEDULE FOR FINISHES: Finishes for outdoor switchgear. /B. Section 13 05 41, SEISMIC RESTRAINT REQUIREMENTS FOR NON-STRUCTURAL COMPONENTS: Requirement for Seismic Restraint for Nonstructural

3、 Components./ C. Section 25 10 10, ADVANCED UTILITY METERING: Electricity meters installed in medium voltage switchgear. D. Section 26 05 11, REQUIREMENTS FOR ELECTRICAL INSTALLATIONS: General electrical requirements that are common to more than one section of Division 26. E. Section 26 05 13, MEDIU

4、M-VOLTAGE CABLES: Medium voltage cables and splices. F. Section 26 05 21, LOW-VOLTAGE ELECTRICAL POWER CONDUCTORS AND CABLES (600 VOLTS AND BELOW): Cables and wiring. G. Section 26 05 26, GROUNDING AND BONDING FOR ELECTRICAL SYSTEMS: Requirements for personnel safety and to provide a low impedance p

5、ath to ground for possible ground fault currents. H. Section 26 05 71, ELECTRICAL SYSTEM PROTECTIVE DEVICE STUDY: Short circuit and coordination study. /I. Section 26 13 13, GENERATOR PARALLELING CONTROLS: For switchgear used as part of a generator paralleling system./ J. Section 26 18 41, MEDIUM-VO

6、LTAGE SWITCHES: Medium-voltage switches. K. Section 26 24 16, PANELBOARDS: For panelboards integral to the medium-voltage switchgear. 1.3 QUALITY ASSURANCE Refer to Paragraph, QUALIFICATIONS, in Section 26 05 11, REQUIREMENTS FOR ELECTRICAL INSTALLATIONS. Provided by IHSNot for ResaleNo reproduction

7、 or networking permitted without license from IHS-,-,-09-10 26 13 00 - 2 1.4 FACTORY TESTS A. Medium voltage switchgear shall be thoroughly tested at the factory to assure that there are no electrical or mechanical defects. Tests shall be conducted as per UL and ANSI Standards. Factory tests shall b

8、e certified. B. Thoroughly test the switchgear at the factory with the circuit breakers in the connected position in their cubicles. The factory tests shall be in accordance with IEEE C37.09 and shall include the following tests: 1. Design Tests 2. Production Tests 3. Conformance Tests: These tests

9、shall also include testing as required in ANSI C37.55, C37.57 and NEMA C37.54. C. The following additional tests shall be performed: 1. Verify that circuit breaker sizes and types correspond to drawings and coordination study. 2. Verify that current and voltage transformer ratios correspond to drawi

10、ngs. 3. Verify tightness of bolted electrical connections by calibrated torque-wrench method in accordance with manufacturers published data. 4. Confirm correct operation and sequencing of electrical and mechanical interlock systems by attempting closure on locked-open devices, and attempting to ope

11、n locked-closed devices, and making key exchange with devices operated in off-normal positions. 5. Verify correct barrier and shutter installation and operation. 6. Exercise all active components. 7. Inspect indicating devices for correct operation. 8. Perform a dielectric withstand voltage test on

12、each bus section, each phase-to-ground with phases not under test grounded, in accordance with manufacturers published data. The test voltage shall be applied for one minute. 9. Perform insulation-resistance tests on control wiring with respect to ground. Applied potential shall be 500 volts dc for

13、300-volt rated cable and 1000 volts dc for 600-volt rated cable, or as required if solid-state components or control devices cannot tolerate the applied voltage. 10. If applicable, verify correct function of control transfer relays located in the switchgear with multiple control power sources. 11. P

14、erform phasing checks on double-ended or dual-source switchgear to insure correct bus phasing from each source. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-09-10 26 13 00 - 3 D. Furnish four (4) copies of certified manufacturers factory test repo

15、rts to the Resident Engineer prior to shipment of the switchgear to ensure that the switchgear has been successfully tested as specified. SPEC WRITER NOTE: Determine if witness testing is a VA requirement. Edit or remove paragraph to conform to project requirements. /E. The Government shall have an

16、option to witness the factory tests. All expenses of the Government Representatives trips to witness the testing will be paid by the Government. Notify the Resident Engineer not less than 30 days prior to making tests at the factory./ 1.5 SUBMITTALS A. In accordance with Section 26 05 11, REQUIREMEN

17、TS FOR ELECTRICAL INSTALLATIONS, submit the following: B. Shop Drawings: 1. Shop drawings shall not be submitted until the Electrical System Protective Device Study has been submitted and approved. 2. Provide detailed drawings with sufficient information, clearly presented, to determine compliance w

18、ith drawings and specifications. 3. Prior to fabrication of switchgear, submit four copies of the following data for approval: a. Complete electrical ratings b. Circuit breaker sizes c. Interrupting ratings d. Safety features e. Accessories and nameplate data f. One line diagram of the primary distr

19、ibution system. g. Elementary and interconnection wiring diagrams. h. Technical data for each component. i. Dimensioned exterior views of the switchgear. j. Dimensioned section views of the switchgear. k. Floor plan of the switchgear. l. Foundation plan for the switchgear. m. Provisions and required

20、 locations for external conduit and wiring entrances. n. Dimensions and approximate design weights. /4. Obtain and submit written approval from the electric utility, that the equipment and material interface with the customer meets with their requirements and approval./ C. Manuals: 1. Submit, simult

21、aneously with the shop drawings, companion copies of complete maintenance and operating manuals, including technical data Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-09-10 26 13 00 - 4 sheets, wiring diagrams, and information for ordering replace

22、ment parts. a. Include complete interconnection diagrams that show all components of the switchgear line-up. b. Include complete diagrams of the internal wiring for each of the items of equipment. c. The diagrams shall identify the terminals to facilitate in the installation, maintenance and operati

23、on. d. Approvals will be based on complete submissions of manuals together with shop drawings. 2. Two weeks prior to the project final inspection or the inspection of the applicable phase that includes switchgear installation, submit four copies of a final updated maintenance and operating manual to

24、 the Resident Engineer. Update the manual to include any information necessitated by shop drawing approval. D. Test Reports: 1. Submit four copies of certified conformance test reports for approval. Reports shall include, but not be limited to, interrupting, short time, momentary, BIL, high potentia

25、l, fault close, and endurance performance. 2. Submit four copies of the certified factory design and production test reports for approval. 3. Two weeks prior to the project final inspection or phase inspection, submit four copies of the certified field test reports and data sheets to the Resident En

26、gineer. E. Certification: Two weeks prior to final inspection, submit four copies of the following to the /Resident Engineer/ /COTR/: SPEC WRITER NOTE: Refer to VA Handbook H-18-8 for Seismic Design Requirements. Specify Region of Seismicity, based on location of the equipment so motor control cente

27、r manufacturers can check/design seismic strength of their equipment. Delete the following paragraph if the motor control center(s) is located outside the seismic zone. /1. Certification from the manufacturer that the switchgear will withstand the seismic forces and that the unit will be fully opera

28、tional after the seismic event at the project site./ 2. Certification by the manufacturer that the materials conform to the requirements of the drawings and specifications. 3. Certification by the Contractor that the materials have been properly installed, adjusted, and tested. Provided by IHSNot fo

29、r ResaleNo reproduction or networking permitted without license from IHS-,-,-09-10 26 13 00 - 5 F. Certifications: Two weeks prior to the project final inspection or the inspection of the applicable phase that includes switchgear installation, submit four copies of the following certifications to th

30、e Resident Engineer: 1. Certification by the manufacturer of the switchgear that the equipment has been properly installed, adjusted and tested. 1.6 APPLICABLE PUBLICATIONS A. Publications listed below (including amendments, addenda, revisions, supplements, and errata) form a part of this specificat

31、ion to the extent referenced. Publications are referenced in the text by the basic designation only. B. American Concrete Institute (ACI): ACI 318 Building Code Requirements for Structural Concrete C. American National Standards Institute (ANSI): C37.20.3 . IEEE Standard for Metal-enclosed Interrupt

32、er Switchgear C37.20.4 . IEEE Standard for Indoor AC Switches (1kV-38kV) for Use in Metal-enclosed Switchgear C37.22 . American National Standard Preferred Ratings and Related Required Capabilities for Indoor AC Medium-Voltage Switches Used in Metal-Enclosed Switchgear C37.47 . Medium voltage Curren

33、t-Limiting Type Distribution Class Fuses and Fuse Disconnecting Switches C37.55 . Switchgear-Metal-Clad Switchgear Assemblies-Conformance Test Procedures C37.57 . Switchgear-Metal-Enclosed Interrupter Switchgear Assemblies Conformance Testing C37.85 . Switchgear-Alternating-Current High-Voltage Powe

34、r Vacuum Interrupters-Safety Requirements for X-Radiation Limits C39.1 Electrical Analog Indicating Instruments, Requirements for D. Institute of Electrical and Electronics Engineers (IEEE): C37.04 . Standard Rating Structure for AC High-Voltage Circuit Breakers C37.09 . Standard Test Procedure for

35、AC High-Voltage Power Circuit Breakers Rated on a Symmetrical Current Basis Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-09-10 26 13 00 - 6 C37.20.2 . Standard for Metal-Clad Switchgear C37.48 . Guide for Application, Operation and Maintenance of

36、Medium voltage Fuses, Distribution Enclosed Single Pole Air Switches, Fuse Disconnection Switches and Accessories C37.90 . Standard for Relays and Relay Systems Associated with Electric Power Apparatus C57.13-93 Standard Requirements for Instrument Transformers E. National Electrical Manufacturers A

37、ssociation (NEMA): C37.06.1 . Guide for AC High-Voltage Circuit Breakers Rated on a Symmetrical Current Basis C37.54 . Switchgear - Indoor Alternating Current High-Voltage Circuit Breakers Applied as Removable Elements in Metal-Enclosed Switchgear Assemblies - Conformance Test Procedures C37.57 . Sw

38、itchgear-Metal-Enclosed Interrupter Switchgear Assemblies-Conformance Testing LA 1.Surge Arrestors SG 4 . Alternating-Current High-Voltage Circuit Breakers SG 5 . Power Switchgear Assemblies F. National Fire Protection Association (NFPA): 70 . National Electrical Code (NEC) PART 2-PRODUCTS 2.1 GENER

39、AL REQUIREMENTS A. The switchgear shall be in accordance with NEMA SG-4, IEEE C37.20.2 and the National Electrical Code as minimum requirements, and shall be as shown on the drawings and as specified. B. Indicating instruments shall be in accordance with ANSI C39.1 C. Relays and relay systems shall

40、be in accordance with IEEE C37.90. D. Instrument transformers shall be in accordance with IEEE C57.13. E. The switchgear line-up shall be a complete, grounded, continuous-duty, integral assembly, metal clad, dead-front, dead-rear, self-supporting, / indoor type switchgear assembly, / tamperproof, we

41、atherproof, outdoor type switchgear assembly with metal housing and a walk-in protected aisle /. Incorporate devices shown on the drawings and everything required to fulfill the operational and other requirements shown on the drawings. F. Ratings shall be not less than shown on the drawings. Short c

42、ircuit ratings shall be not less than / 250 / 500 / 750 / 1000 / MVA. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-09-10 26 13 00 - 7 G. Switchgear shall conform to the arrangements and details of the drawings and space designed for installation.

43、/H. Coordinate all requirements with the power company supplying electrical service to the switchgear so the incoming power supply feeder and revenue metering installations will conform to the requirements of the power company./ I. Interlocking shall be provided as shown on the drawings and as requi

44、red for the safety of personnel and safe operation of the equipment. J. Switchgear shall be assembled, connected and wired at the factory so that only external circuit connections are required at the construction site. Split the structure only as required for shipping and installation. Circuit break

45、ers and accessories shall be packaged and shipped separately. Packaging shall provide adequate protection against rough handling during shipment. K. All non-current carrying parts shall be grounded per applicable articles of the National Electrical Code. Refer to Section 26 05 26, GROUNDING AND BOND

46、ING FOR ELECTRICAL SYSTEMS for additional requirements. 2.2 HOUSING A. The equipment and structure shall have the following features: 1. Frames and enclosures: a. The assembly shall be braced with reinforcing gussets and jig welds as required to assure rectangular rigidity. b. The enclosure shall be

47、 steel, leveled and not less than the gauge required by NEMA and ANSI Standards. c. Die-pierce the holes for connecting adjacent structures to insure proper alignment and to allow for future additions. d. All bolts, nuts, and washers shall be cadmium-plated steel. 2. Cubicles: a. An individual cubic

48、le shall be supplied for each circuit breaker and each future circuit breaker indicated. Cubicles shall also be provided for auxiliaries, metering, and transitions as indicated on the drawings. 1) Compartment each cubicle so that the circuit breaker, buses, and cable terminations are in separate com

49、partments with steel partitions or barriers of approved and properly installed insulation. 2) Each cubicle furnished with a circuit breaker (active or spare) shall be fully equipped as noted on drawings and specified below. 3) Each cubicle noted as space for future circuit breaker shall be fully equipped for positioning and connecting the breakers. Provided by IHSNot for ResaleNo reproducti