1、Beneficial comments, recommendations, additions, deletions, clarifications, etc. and any data that may improve this document should be sent to: WR-ALC/GRVEA, Robins AFB GA 31098-1813. Since contact information can change, you may want to verify the currency of this address information using the ASSI
2、ST Online database at https:/assist.daps.dla.mil/online . FSC 6625 INCH-POUNDA-A-59880 23 Nov 2010 COMMERCIAL ITEM DESCRIPTION LOAD BANK, ELECTRICAL 160 kilowatts, 60 Hertz The General Services Administration has authorized the use of this commercial item description for all federal agencies. 1. SCO
3、PE. This Commercial Item Description (CID) describes an alternating current (AC), 160 kilowatt (kW), 60 Hertz (Hz) portable type, resistive load bank and accessories. The commercially available, portable, enclosed, forced air cooled, industrial load bank is used for electrical performance testing of
4、 tactical power generators and other 60 Hz generator and power supply systems used for ground-based power operations. 2. SALIENT CHARACTERISTICS 2.1 Safety and environmental. The equipment shall meet all safety and environmental requirements as specified in National Fire Protection Association (NFPA
5、) 70 National Electrical Code (NEC), ANSI/IEEE C2 National Electrical Safety Code and the latest applicable National Electrical Manufacturers Association (NEMA) standards except as stated herein. All resistive load element buses shall be over-current protected. Air flow failure shall cause the load
6、bank to automatically drop all connected load before an over-temperature condition occurs. 2.2 Electrical power sources. The load bank shall be completely self-contained to include all controls, connection points, instrumentation, load elements and system protective devices. The operating power for
7、internal circuits, instruments, and fan(s) shall be user selectable between being derived only from the power source under test, or from an external power source. All controls shall be located on a local control panel. 2.3 Operating temperature. The equipment shall meet its performance and accuracy
8、requirements in an operating environment of -20 degrees F to +125 degrees F. 2.4 Non-operating temperature. The equipment shall meet its performance and accuracy requirements (see 2.8.1.1) after being in a non-operating environment (Storage Temperature) of -65 degrees F to +160 degrees F. Provided b
9、y IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-59880 2 2.5 Calibration and maintenance adjustments. The design of the system shall provide for readily accessible calibration adjustments and maintenance adjustments. The calibration adjustments, wherever po
10、ssible, shall be accessible without removal of the instrument case or modules. These adjustments shall be provided by variable value components. The calibration by substitution of selected components or parts is unacceptable unless specifically approved. The calibration interval shall be a period of
11、 one year or greater based on an operating time of 2,000 hours. 2.6 Accessories. Accessories to be supplied by the manufacturer with each deliverable load bank shall include standard and optional accessories as provided by the manufacturer and listed in the manufacturers catalog or data sheet. A wri
12、tten users manual, a written programmer reference manual (if applicable), and a traceable calibration certificate shall also be provided with each load bank unit. The user manual(s) shall include complete details for the operation, troubleshooting and maintenance of the load bank and shall include i
13、nterconnect drawings and electrical schematics for all power and control circuits and devices. A complete parts listing shall be delivered with each load bank and shall include, at a minimum, the original manufacturers name, part number, rating, identification and quantity required. 2.7 Environmenta
14、l requirements. The load bank shall be designed for indoor or sheltered use and indoor storage. The load bank shall be clearly marked “NOT FOR USE IN HAZARDOUS LOCATIONS”. 2.8 Performance characteristics. The load bank shall be capable of continuous, resistive load testing of ground power generator
15、sets by providing loads ranging from 0 to not less than 160 kW load at 240 and 480 volts AC, 3 phase, 4 wire, 60 Hz. The load bank shall also be capable of providing loads ranging from 0 to not less than 120 kW at 208 and 416 volts AC, 3 phase, 4 wire, 60 Hz. 2.8.1 Controls. The load bank shall incl
16、ude a local operator control panel containing all meters, switches, alarms, indicators and instructions necessary for the proper operation of the load bank. A latching, hinged cover assembly shall be provided to protect the control panel from damage when not in use. 2.8.1.1 Meters. The control panel
17、 of the load bank shall be equipped with individual meters for monitoring voltage (0-600 volts AC), frequency (45-65 Hz), and current (0-400 amps AC). Meter accuracy shall be within 3%, full scale. 2.8.1.2 Phase selector switch. The load bank shall have a phase selector switch on the control panel f
18、or measuring the current of each phase of incoming power (A, B, C). Voltage measurements shall be selectable for line-to-line for each phase on incoming power. 2.8.2 AC input connections. The load bank input shall be equipped with portable power cables rated for extra hard usage and capable of conti
19、nuously carrying the load banks rated full load current. Input power cable length shall not be less than fifteen (15) feet per phase conductor with terminal lugs on the ends for connection to power supply studs. External control power or cooling fan power input cable shall be designed for 120 volts
20、AC, 60 Hz, single phase, be provided with a properly rated input connector, be rated for extra hard usage and be not less than Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-59880 3 15 feet in length. All input cables shall be highly flexible co
21、pper conductor and rated for 600 volts minimum. Input power cable storage shall be provided on the load bank. 2.8.3 Load elements. The load bank load elements shall be of the purely resistive type and shall be designed so that a load of any magnitude within the range of one to 160 kW may be absorbed
22、. Load elements shall be protected from damage per NEC article 110-10 by the use of user resettable circuit breakers, user replaceable fuses, or automatically resetting thermal switches. All load elements shall be connectable to incoming power by means of electrical contactors. Load balance shall be
23、 within +/- 2.5% between phases. 2.8.4 Step loading. The load bank shall provide a means to apply incremental loading (step loading). The following load steps should be available (at a minimum): 1kw, 2kw, 5kw, 10kw, 20kw and 50kw. The use of multiple load steps of the same size is acceptable. Load s
24、teps of a different resolution may be acceptable, based upon Government review. The tolerance of each load step shall be no more than 5%. These loads shall be selectable individually or in combinations to provide loads up to and including 160 kW. 2.8.5 Shock loading. The load bank shall have a singl
25、e master load switch for shock loading the unit under test at any load setting available described in paragraph 2.8.4. The single switch may also serve as a master load disconnect switch. 2.8.6 Grounding. Electrical grounding shall be accomplished in accordance with NFPA 70 - NEC, Section 250. An ex
26、ternal ground terminal shall be provided so that a separate external user ground conductor connection may be added. This ground terminal shall be bonded to the main metal frame and chassis of the load bank, be clearly marked, easily accessible and within sight of the operator when standing at the co
27、ntrol panel. 2.8.7 Over-temperature. The load bank shall contain adequate protection circuitry to automatically protect the load elements and controls and shall immediately cease operation in the event of a cooling failure or over-temperature condition. 2.8.8 Over-voltage. The load bank shall contai
28、n adequate protection circuitry to automatically cease operation to protect the load elements, controls and operator in the event of an over-voltage condition on the input power. 2.8.9 Load disconnect. The load bank shall have provision for the manual de-activation of load elements in the case of a
29、failure of the automatic protection system. The load disconnect shall provide a single point for instantaneous load removal from the load bank. 2.8.10 Continuous operation. The load bank shall be capable of a continuous run at full load for up to four hours. The load bank shall be capable of cool do
30、wn to ambient temperature within five minutes, with cooling fan on, under no load conditions, and be capable of performing multiple back to back full loads without damage to components. The load bank shall be capable of withstanding instantaneous input power disconnection with cooling fan stoppage a
31、t full load without damage to the load bank components. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-59880 4 2.9 Construction. The load bank shall be constructed to withstand the strains, jars, vibrations, and other conditions incident to ship
32、ping, storage, service and operation. Electrical components shall be designed to withstand transient voltage and current level sags and surges associated with load testing stand-alone generator sets. Enclosure finishes and other components shall employ best commercial design practices and be designe
33、d to withstand the high temperatures and exposures normally associated with load bank operations. Cooling air intake and exhaust openings shall be covered with screens or louvers to protect load elements from foreign object damage. Access to cooling fan(s), instrumentation wiring, contactors, load e
34、lements, protective devices and associated wiring shall be through removable or hinged panels. 2.9.1 Transportability. The load bank shall be provided with wheels having a diameter of five (+/- 1) inches on lockable casters, to allow easy movement over hard surfaces. The load bank shall be construct
35、ed to have the capability of being lifted and transported by forklift by means of forklift tine guides incorporated into the load bank enclosure. The load bank shall have provisions for sling lifting or eye lifting without sustaining damage. 2.9.2 Size. The load bank overall dimensions shall not exc
36、eed 60“L x 36“Wx 50“H, including handles and wheels. 2.9.3 Weight. The weight of the load bank shall not exceed 700 pounds (not including input power cables). 2.9.4 Fire prevention and safety. The enclosure of the load bank shall employ best commercial design practices to reduce the danger to person
37、nel from fire and explosion. Suitable vents and drains shall be incorporated into the enclosure of the load bank to reduce the risk of hazards. 2.9.5 Workmanship and wiring. The load bank shall be manufactured with the best commercial practices and be free from defects. All wiring shall be neatly ro
38、uted, terminated and identified. 3. REGULATORY REQUIREMENTS. 3.1 Recycled recovered materials. The contractor is encouraged to use recovered materials to the maximum extent practicable, in accordance with 23.403 of the Federal Acquisition Regulation (FAR). 3.2 Green Procurement Program. Green Procur
39、ement Program (GPP) is a mandatory federal acquisition program that focuses on the purchase and use of environmentally preferable products and services. GPP requirements apply to all acquisitions using appropriated funds, including services and new requirements. FAR 23.404(b) applies and states the
40、GPP requires 100% of Environmental Protection Agency (EPA) designated product purchase that are included in the Comprehensive Procurement Guidelines list that contains recovered materials, unless the item cannot be acquired: a) competitively within a reasonable timeframe; b) meet appropriate perform
41、ance standards, or c) at a reasonable price. The prime contractor is responsible for ensuring that all subcontractors comply with this requirement. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-59880 5 4. PRODUCT CONFORMANCE PROVISIONS. 4.1 Pro
42、duct conformance. The products provided shall meet the salient characteristics of this CID, conform to the producers own drawings, specifications, standards, and quality assurance practices, and be the same product offered for sale to the Government or in the commercial market place. The Government
43、reserves the right to require proof of such conformance. 4.2 Contractor certification. The contractor shall certify and maintain substantiating evidence that the product conforms to the producers own drawings, specifications, standards, and quality assurance practices, and is the same product offere
44、d for sale in the commercial marketplace. The Government reserves the right to require proof of such conformance. Proof of conformance may include, but shall not be limited to the performance of operational tests, lab tests, modeling and simulation and delivery of reports and data from these tests.
45、4.3 Responsibility of inspection. Unless otherwise specified in the contract or CID, the contractor is responsible for the performance of all inspection, examination, and test requirements specified herein. Except as otherwise specified in the contract or CID, the contractor may use his own faciliti
46、es or any other facilities suitable for the inspection requirements specified herein, unless disapproved by the Government. The Government reserves the right to set forth in this description where such inspections, examinations and tests are deemed necessary to assure supplies and services conform t
47、o prescribed requirements. 4.4 Examination of product. Each load bank shall be examined to verify compliance with the requirements herein prior to accomplishing any other tests listed in 4.5. A contractor-generated, Government-approved checklist shall be used to identify each requirement not verifie
48、d by a test or analysis, and shall be used to document the inspection results. Particular attention shall be given to materials, workmanship, dimensions, surface finishes, protective coatings and sealants and their application, welding, fastening, and markings. Proper operation of each load bank fun
49、ction shall be verified. Each production load bank shall be inspected to a Government-approved reduced version of the checklist. 4.5 Operational test. Each load bank shall be operated at rated full load for not less than 10 minutes, after complete assembly and prior to shipment, to ensure all parts are functioning according to the manufacturers requirements. 5. PACKAGING. 5.1 Preservation, packing, and marking shall be as specified in the contract or order. 6. N
