MIL-HDBK-1004/5
Table 6 (Continued)
Maximum Unit Loads on Feeders (1)
______________________________________________________________________________
Cable Length
Bus 3
Number of
No-Load
Feet
Per-Unit Volts (2)
Unit Loads
Volts 1-n
______________________________________________________________________________
0.9560
Eight
114.7
0.9505
Nine
114.0
0.9450
Ten
113.4
5,000
0.9973
One
119.6
0.9919
Three
119.0
0.9865
Five
118.4
0.9811
Seven
117.7
0.9757
Nine
117.1
0.9703
Eleven
116.4
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(1)
Voltage regulated on the high-voltage side (4,160 volts) of the frequency
conversion transformer assembly.
(2)
The utilization service center transformer per-unit base is 208/120
volts. See Appendix A for detailed analysis of the system.
(3)
The underlined rows denote the maximum number of unit load wherein
voltage does not drop below 113 volts.
Table 7
Maximum 400-Hertz Medium-Voltage Cable/Lengths and Loads
______________________________________________________________________________
Individual
Step Load Capability
Feeder Cable
100-Ampere,
at 0.8 Power Factor
Length
0.8-Power-Factor,
Steady State
Step Load
Feet
Steady State
Load
Addition
Unit Loads
Amperes
Amperes
_____________________________________________________________________________
0
400
100
300
15,000
4
200
200
300
100
400
0
______________________________________________________________________________
Table 8
Maximum 400-Hertz Low-Voltage Cable Lengths (1)
______________________________________________________________________________
Service Cable Length Feet
Aircraft Cable Length Feet
______________________________________________________________________________
250
60
______________________________________________________________________________
(1) Based on a 100-ampere, 0.8-power-factor unit load.
15
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