VA 26 13 13-2010 GENERATOR PARALLELING CONTROLS.pdf

《VA 26 13 13-2010 GENERATOR PARALLELING CONTROLS.pdf》由会员分享，可在线阅读，更多相关《VA 26 13 13-2010 GENERATOR PARALLELING CONTROLS.pdf（14页珍藏版）》请在麦多课文档分享上搜索。

1、09-10 26 13 13 - 1 SECTION 26 13 13 GENERATOR PARALLELING CONTROLS SPEC WRITER NOTE: Delete between / - / if not applicable to project. Also delete any other item or paragraph not applicable to the section and renumber the paragraphs. PART 1 - GENERAL 1.1 DESCRIPTION A. This section specifies the fu

2、rnishing, installation, and connection of medium- and low-voltage indoor switchgear control components for paralleling /Standby/ /and/ /Essential/ Electrical System generators. The generator paralleling control components shall be integral to the switchgear and be products of the same manufacturer.

3、B. For generator paralleling switchgear power components, including enclosures, bussing, and circuit breakers, see related specification sections. 1.2 RELATED WORK /A. Section 13 05 41, SEISMIC RESTRAINT REQUIREMENTS FOR NON-STRUCTURAL COMPONENTS: Requirements for seismic restraint of nonstructural

4、components./ A. Section 25 10 10, ADVANCED UTILITY METERING: Requirements for electrical metering. B. Section 26 05 11, REQUIREMENTS FOR ELECTRICAL INSTALLATIONS: General electrical requirements and items that are common to more than one section of Division 26. C. Section 26 05 26, GROUNDING AND BON

5、DING FOR ELECTRICAL SYSTEMS: Requirements for personnel safety and to provide a low impedance path for possible fault currents. D. Section 26 05 71, ELECTRICAL SYSTEM PROTECTIVE DEVICE STUDY: Coordination study of overcurrent protection devices. E. Section 26 13 00, MEDIUM-VOLTAGE SWITCHGEAR: For me

6、dium-voltage enclosures, bussing, and circuit breakers for generator paralleling switchgear. F. Section 26 23 00, LOW-VOLTAGE SWITCHGEAR: For low-voltage enclosures, bussing, and circuit breakers for generator paralleling switchgear. G. Section 26 32 13, ENGINE-GENERATORS: Requirements for power gen

7、eration. H. Section 26 36 23, AUTOMATIC TRANSFER SWITCHES: Requirement for automatic transfer switches. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-09-10 26 13 13 - 2 1.3 QUALITY ASSURANCE Refer to Paragraph, QUALIFICATIONS, in Section 26 05 11,

8、REQUIREMENTS FOR ELECTRICAL INSTALLATIONS. 1.4 FACTORY TESTS A. Generator paralleling controls shall be thoroughly tested at the factory to assure that there are no electrical or mechanical defects. Refer to related specification sections for tests. Tests shall be conducted as per UL and ANSI standa

9、rds. Factory tests shall be certified. B. Furnish four copies of certified manufacturers factory test reports to the /Resident Engineer/ /COTR/ prior to shipment of the generator paralleling switchgear to ensure that the switchgear has been successfully tested as specified. SPEC WRITER NOTE: Determi

10、ne if witness testing is a VA requirement. Edit or remove paragraph to conform to project requirements. /C. The Government shall have the option to witness the factory tests. The Government shall pay for all expenses of the Government Representatives trips to witness the testing. Notify the /Residen

11、t Engineer/ /COTR/ not fewer than 30 days prior to making tests at the factory./ 1.5 SUBMITTALS A. In accordance with Section 26 05 11, REQUIREMENTS FOR ELECTRICAL INSTALLATIONS, submit the following: B. Shop Drawings: 1. Per the requirements of /Section Section 26 13 00, MEDIUM-VOLTAGE SWITCHGEAR/

12、/Section 26 23 00, LOW-VOLTAGE SWITCHGEAR/. 2. Include sequences of operation and interconnecting controls diagrams, showing connections to generators, automatic transfer switches, and remote annunciators and controls. C. Manuals: 1. When submitting the shop drawings, submit companion copies of comp

13、lete maintenance and operating manuals, including technical data sheets, wiring diagrams, and information for ordering replacement parts. a. The terminals of wiring diagrams shall be identified to facilitate installation, maintenance, and operation. Provided by IHSNot for ResaleNo reproduction or ne

14、tworking permitted without license from IHS-,-,-09-10 26 13 13 - 3 b. Wiring diagrams shall indicate internal wiring for each piece of equipment and the interconnection between the pieces of equipment. c. Provide a clear and concise description of operation, including detailed information required t

15、o properly operate the equipment. d. Approvals shall be based on complete submissions of manuals together with shop drawings. 2. Two weeks prior to final inspection, deliver four copies of the final updated maintenance and operating manuals to the /Resident Engineer/ /COTR/. a. The manuals shall be

16、updated to include any information necessitated by shop drawing approval. b. Complete “As Installed“ wiring and schematic diagrams shall be included, showing all pieces of equipment and their interconnecting wiring. c. Show all terminal identification. d. Include information for testing, repair, tro

17、uble-shooting, assembly, disassembly, and factory recommended/required periodic maintenance procedures and frequency. e. Provide a replacement and spare parts list. Include a list of tools and instruments for testing and maintenance purposes. f. Furnish manuals in loose-leaf binder or manufacturers

18、standard binder. D. Certifications: Two weeks prior to the final inspection, submit four copies of the following certifications to the /Resident Engineer/ /COTR/: 1. Certification by the manufacturer that the materials conform to the requirements of the drawings and specifications. 2. Certification

19、by the contractor that the materials have been properly installed, connected, and tested. 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 center manufacturers can check/design seismic str

20、ength of their equipment. Delete the following paragraph if the motor control center(s) is located outside the seismic zone. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-09-10 26 13 13 - 4 3. Certification from the manufacturer that the generator

21、paralleling controls will withstand any seismic forces and that the unit will be fully operational after the seismic event at the project site. 1.6 APPLICABLE PUBLICATIONS Per the requirements of related specification sections. PART 2 - PRODUCTS 2.1 MASTER CONTROL CUBICLE A. Shall contain all system

22、-totalizing controls for the integrated system operation as specified below: 1. Bus Metering: a. AC ammeter. b. AC voltmeter. c. Frequency meter 55-65 Hz Scale. d. Watt/Var meter. e. Ammeter/Voltmeter phase selector switches with current and potential transformers and proper fuses. 2. Reverse Power

23、Monitors: Solid-state reverse power monitors shall be furnished to sense motorizing of a failing engine-generator set. Upon detection of a reverse power flow, the monitor shall signal the alarm circuit for immediate power disconnect of the generator and actuation of load dumping circuits, and energi

24、ze the audible and visual alarm signals. Monitors shall automatically reset the open generator disconnect from the bus. An induction disc type reverse power relay with equivalent performance may be submitted for approval. The monitor shall have the following features: a. Accurate operation at power

25、factors down to 0.2 lagging or leading. b. Minimum 10 A output contacts rated at 480 V. c. Circuitry arranged to continually sense the output power of the generator for magnitude and direction. d. Operate accurately over voltage range of 70% to 110% of rated voltage. e. Adjustable dial for trip powe

26、r range. f. Test switch to simulate reverse power for periodic testing. Switch shall be arranged to cause sensing circuitry to measure reverse power. 3. Synchronizing Monitors: A solid-state generator-synchronizing monitor shall sense voltage, frequency, and phase angle of the Provided by IHSNot for

27、 ResaleNo reproduction or networking permitted without license from IHS-,-,-09-10 26 13 13 - 5 generator to be paralleled. The monitor shall compare the voltage of the bus with that of the unit to be paralleled and initiate corrective action to cause the voltage difference to be reduced to less than

28、 5% of nominal. Voltage adjustment shall be achieved by a motorized voltage adjusting potentiometer, as furnished by the engine-generator manufacturer. The monitor shall compare the frequency of the bus with that of the unit to be paralleled, and shall control the governor to cause the frequency of

29、the unit to be paralleled to match within 0.2 Hz. The monitor shall also compare the phase angle of the bus with that of the unit to be paralleled and reduce the phase angle of the unit to be paralleled to a maximum of five electrical degrees at the instant the connection is made to the bus. Upon ac

30、hievement of the appropriate phase angle, the generator circuit breaker shall close to parallel the unit. The monitor shall be mounted remotely in the control cabinet. Solid-state circuitry shall be used for all sensing and control functions. Interface circuits for control of voltage adjustment and

31、circuit breaker closing shall be through enclosed electromagnetic relays. 4. Synchroscope: a. Furnish with a selector switch and manual means of paralleling engine-generator sets for override of the automatic system. b. Furnish with a synchronizing phase band limiter to sense and compare the phase a

32、ngle difference in the generators, which are to be manually paralleled, and lock out the manual paralleling button within 15 degrees (electrical) of synchronism. 5. Load Demand Monitor: A load demand monitor shall sense the load connected to the bus, and establish the proper number of engine-generat

33、ors to operate and maintain the connected load with a minimum on-line reserve generating capacity of 10% of the rating of a single engine-generator. The load monitor shall also disconnect a generator from the bus whenever the on-line reserve capacity exceeds 110% of a single generator set. The load

34、demand monitor shall be adjustable to initiate the addition and removal of a generator from the main bus. The load monitor shall maximize fuel economy while maintaining sufficient capacity to sustain the load. 6. Frequency Monitor: Provided by IHSNot for ResaleNo reproduction or networking permitted

35、 without license from IHS-,-,-09-10 26 13 13 - 6 A frequency monitor with integral time delay shall initiate load dumping upon a reduction of the bus frequency to 58 Hz or less for a period of two seconds or more. Upon sensing a bus under-frequency, the system shall automatically shed the lowest pri

36、ority load connected. This shed circuit shall override any manual load add activity and lock out the manual load add circuitry. Visual and audible alarms shall be energized upon sensing of bus under-frequency load dump. 7. Automatic Transfer Switch Interface: a. For each transfer switch, incorporate

37、 red and green lamps, indicating the position of the transfer switch. b. For each transfer switch, incorporate a two-position contact switch. Label switch positions, “TEST“ and “AUTOMATIC.“ The TEST position shall simulate an outage of normal power at the transfer switch. The AUTOMATIC position shal

38、l place the transfer switch in normal operation. 8. Alarms: Provide individual visual signals plus a common audible alarm and silencing circuitry. Provide a test switch which will momentarily actuate the visual and audible alarms. The following conditions shall be monitored: a. Low Fuel Level Main S

39、torage Tank shall be energized when the fuel oil level decreases to less than one-third of total capacity. b. Under-frequency failure. c. Controls not in automatic mode. d. Load shed circuit activation. B. Control Logic: 1. The control logic shall be distributed between the Master Control Cubicle an

40、d each Engine-Generator Control Cubicle such that each engine-generator is capable of starting and paralleling to the bus in the event of receipt of a start signal from any automatic transfer switch and failure of the Master Control Cubicle. C. Control Power: SPEC WRITER NOTE: Edit the paragraph bel

41、ow to conform to project requirements. Control power for the paralleling controls shall be derived from battery supply as specified in /Section 26 13 00, MEDIUM-VOLTAGE SWITCHGEAR/ /Section 26 23 00, LOW-VOLTAGE SWITCHGEAR/. Provided by IHSNot for ResaleNo reproduction or networking permitted withou

42、t license from IHS-,-,-09-10 26 13 13 - 7 SPEC WRITER NOTE: Coordinate with Section 26 36 23, AUTOMATIC TRANSFER SWITCHES. Edit the paragraph below to conform to project requirements. D. Interconnecting Communications Protocol and Media: The paralleling switchgear shall be interconnected to the auto

43、matic transfer switches/ and the remote annunciator(s)/ by a dedicated fiber optic network, per the requirements of Section 27 15 00, COMMUNICATIONS HORIZONTAL CABLING. Provide all necessary fiber optic media, raceways, hardware, software, and programming necessary to establish interconnection betwe

44、en the paralleling switchgear and automatic transfer switches/ and the remote annunciator and control system/. All equipment shall share a common open communications protocol. SPEC WRITER NOTE: The paragraph below is also included in Section 26 32 13, ENGINE-GENERATORS. Include it in this Section wh

45、en the controls for each paralleled engine-generator are part of the paralleling switchgear, and edit the paragraph to conform to project requirements. /2.2. ENGINE-GENERATOR CONTROL CUBICLE A. Starting and Stopping Controls: 1. A three-position, maintained-contact type selector switch with position

46、s marked “AUTOMATIC,“ “OFF,“ and “MANUAL“. Provide flashing amber light for the OFF and MANUAL positions. 2. A momentary contact push-button switch with positions marked “MANUAL START“ and “MANUAL STOP.“ 3. Selector switch in AUTOMATIC position shall cause the engine to start automatically when a si

47、ngle pole contact in a remote device closes. When the generators output voltage increases to not less than 90% of its rated voltage, and its frequency increases to not less than 58 Hz, the remote devices shall transfer the load to the generator. An adjustable time delay relay, 0 to 15 minute range,

48、shall cause the engine-generator to continue operating without any load after completion of the period of operation with load. Upon completion of the additional 0 to 15 minute (adjustable) period, the engine-generator shall stop. 4. Selector switch in OFF position shall prevent the engine from start

49、ing either automatically or manually. Selector switch in MANUAL Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-09-10 26 13 13 - 8 position shall cause the engine to start when the manual start push-button is depressed momentarily. 5. With selector switch in MANUAL position, depressing the MANUAL ST