Quantcast Techniques for Minimizing Voltage Drop

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LANTNAVFACENGCOM A&E GUIDE
3/93
(b) Testing of backup current limiting fuse in series with
expulsion fuse according to ANSI C37.41, "Design Tests for
High-Voltage Fuses, Distribution Enclosed Single-Pole Air
Switches, Fused Disconnecting Switches, and Accessories."
(c) Backup current limiting fuses be manufactured by A.B.
Chance Co., Cooper Industries, or an approved equal.
400 HERTZ SYSTEMS
A.2.3
DESIGN CRITERIA
A.2.3.1
DM-4.05, "400 Hz Generation and Distribution Systems."
A.2.3.2
NOMINAL UTILIZATION VOLTAGE
The nominal ac utilization voltage is 200Y/115V, three phase, 4 W.
TECHNIQUES FOR MINIMIZING VOLTAGE DROP
A.2.3.3
a. Use rigid aluminum or PVC conduit except that aluminum shall not be
used in concrete.
b. Use only copper conductors.
c. Use thin-wall insulation types (THWN, THHN, XHHW, etc., should
be considered).
d. Use multi-conductor cables.
e. Use smaller paralleled conductors in lieu of larger single conductors.
f. Use line drop compensators.
A.2.3.4
ISOLATING 400 HZ SYSTEMS
The 400 Hz system shall be completely separate from other systems (i.e., a
400 Hz circuit shall not be installed in the same box or cabinet as a 60 Hz
circuit unless barriers are used to separate sections).
Attachment A-14





 


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