Sizing recommendations for fire pump applications
be found at www.cumminspower.com. About the author Jim Iverson is a senior applications engi-neer for Cummins Power Generation, with an M.S. in Engineering Science, and a B.S. in Electrical Engineering. Since 1976, he has managed Transfer Switch Design, Systems Engineering, Switchgear & Controls, and Technical Marketing & Sales. Jim provides
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Amp chart - Cummins Inc.
incal.cummins.com1250 1000 6021 3474 3284 3010 1642 1505 1204 301 219 174 105 63 52 1563 1250 7527 4343 4106 3764 2053 1881 1506 376 274 217 131 79 65 1875 1500 9031 - - 4516 2463 2258 1806 452 328 260 157 94 78 2188 1750 10539 - - - 2874 2635 1806 452 383 304 183 110 92 2500 2000 12042 - - - 3284 3010 2408 602 438 347 209 126 105
How to size a genset: Proper generator set sizing requires ...
incal.cummins.comwhether the application is for standby power, prime power or utility paralleling. Standby power systems generally have no overload capability. Prime power ... Factor is the ratio of kW to kVA and is expressed as a decimal figure (0.8) or as a percentage (80%). ... to 1.15 times the steady-state running load for 12-pulse. These loads are ...
Calculating generator reactances - Cummins Inc.
incal.cummins.comcycles may almost double the symmetrical value of cur-rent. Specifications that limit the sub-transient reactance (x" d) to 12-per-unit or less limit the voltage distortion caused by non-linear load currents. Calculation of the available short circuit current using per-unit values may require converting from the alternator base rating to the
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Calculating generator reactances - Cummins Inc.
incal.cummins.comyour distributor, visit www.cumminspower.com. For example, suppose you want to find the sub-transient reactance (X" d) in Per-Unit for the 105°C rise, 480 volt alternator on a 750 kW DFHA generator set. From the generator set specification sheet, S-1132, the alternator data sheet is ADS-311. ADS-311 shows