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A buyer in the Government Non-Military industry located in Provo, Utah United States  successfully sourced for the Repair / Maintenance of a part called UPS for Power Plant on www.MFG.com
Request for Quote Details:
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The specific Repair / Maintenance process that was specified is Repair/Maintenance. |
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This RFQ was for 1 and 1 Each. The estimated annual usage is 1. |
RFQ Notes:
UPS for Power Plant: 100 kVA. Input-1: from a 3 phase rectifier (380 V, 3-phase to 220VDC), Input-2: from 220 VDC batteries. Output: 220VAC, 50 Hz, single phase. Ambient Temp: 50 deg C, Humidity: 87%, Protected to IP31. Including static transfer switch, emergency line with isolation transformer. See attached technical requirements and system sketch.
UPS for Power Plant: 40 kVA UPS Units, Input- 1: from 3 phase rectifier (380 V, 3-phase to 220VDC), Input-2: from 220 VDC batteries. Output: 220VAC, 50 Hz, single phase. Ambient Temp: 50 deg C, Humidity: 87%, Protected to IP31. Including static transfer switch, emergency line with isolation transformer. See attached technical requirements and system sketch.
CSI-312: Technical Requirements for Static Inverter The inverters shall be rated at 40 kVA and 100 kVA. The input power supply to each inverter is consisting of 1) from a 3-phase rectifier (380 V, 3-phase, to 220 VDC), and 2) from a 220 VDC batteries. The Output with a bypass source input voltage of 220 VAC, 50 Hz, single phase. Each unit shall be capable of operating under the following conditions: 50 deg C Ambient Temp, 87% humidity, and Protected to IP31. Including static transfer switch and emergency line with isolation transformer. The static-type inverter shall use silicon-controlled rectifiers or power semiconductors. Include in the inverter enclosure a zero break automatic static transfer switch that transfers load to an RVT connected to a standby ac source on an inverter failure or overload condition, and in the event of a short-circuit on the inverter output. The static switch shall also include manual/automatic mode selector switch and manual retransfer to normal mode of operation. The inverter shall be capable of operating, without damage, under the following transient conditions: • Short circuit at output terminals • Opening and closing of input circuit breaker with any connected load from 1 to 125 percent of rated load • Step additions and removal of loads in any increments from no load to 125 percent of full load A filter shall be provided to prevent a dc voltage transient of 4,000 V maintained for 10 microseconds from reaching the inverter internals. A sensing circuit shall continuously monitor the frequency of, and lock the inverter output into synchronism with, the standby ac source. Provide logic circuitry that transfers control of the frequency to the built-in frequency control oscillator if the monitored frequency deviates more than 0.5 percent from rated frequency, and that resynchronizes with the standby ac source when the frequency has stabilized for 1 minute to the inverter output frequency shown on the datasheet included with the MR. An input molded case circuit breaker shall be provided for static inverter. Breaker shall have an interrupting rating equal to or greater than 25kA. Provide an output molded case switch for the inverter having a short circuit withstand rating equal to or greater than the short-circuit rating of the inverter.
Indicating lights shall be provided on the front of the inverter to indicate the following: • In synchronism with alternate ac source (green light) • Loss of outside synchronization (red light) • Inverter supplying ac load (green light) • Alternate source supplying ac load (amber light) • Battery supplying dc load to inverter (red light) • Loss of alternate source (red light) • Inverter failure (red light) • Inverter fan failure (if fans required) (red light) • Pre-charge complete (for 20 kVA and larger inverters only) (green light) • Manual bypass switch position (green light for normal position and red light for bypass position) Furnish a Form C contact wired out to a terminal block that provides a remote INVERTER TROUBLE common alarm for the following conditions: • Static switch transfer of load to the alternate ac source (74-2) • Manual bypass switch transfer of load to alternate source (74-3) • Bypass source failure (27-4) • Battery supplying dc load to inverter • Loss of alternate source • Inverter failure (74-1) • Inverter fan failure (if fan is required) (FF) • AC primary input circuit breaker/fuse tripped/open (52- 1/a) • AC output circuit breaker/fuse tripped/open (52-2/a) A make-before-break, two-position manual transfer switch with an outside handle that transfers the load to the bypass source, thereby allowing maintenance and testing to be performed on the inverter shall be provided. Include switch position indication on the front panel of the inverter. The following meters shall be provided with 2 percent accuracy on the front of the inverter: • AC output ammeter • AC output voltmeter • AC output frequency meter • DC input ammeter • DC input voltmeter An isolated neutral bus for connecting neutral wires of field-routed cables shall be provided. All components shall be able to withstand the maximum battery equalization voltage.
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