MIL-HDBK-1004/5
Section 5:
USE OF 2,400-VOLT FEEDER CABLE
5.1
Advantages. The use of a 2,400-volt system has no great advantage
over the use of a 4,160-volt system.
5.2
Disadvantages. The disadvantages of the 2,400-volt system are
indicated by its decreased kVA capacity when compared to that of the 4,160-
volt system. See Figure A-39 which is based on the impedance values given in
Table A-6. The per-unit values of impedance for the 4,160- and 2,400-volt
feeder cables can be related to feeder cable length. From such a
relationship, the per-unit values for the 2,400-volt feeder cable for a given
length are equal to the per-unit values of a 4,160-volt feeder cable three
times as long. Any cable parameters selected will give the same relationship.
Figure A-39
Comparison of Feeder-Load Capacity at Different Voltage Levels
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