Quantcast Figure 32. Single Short on Load

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MIL-HDBK-1023/4
LIGHTS MAY BE DIM OR DARK.
= ON
= DIM
= OFF
L1-A L2-A
ON
A
REGULATOR
Figure 32
Single Short on Load
Whenever this load-to-load short condition is detected or suspected, action should begin
immediately. First, warn all personnel who could possibly come into contact with the circuits
which have the hazardous condition. Then, repairs should begin as soon as possible to prevent
damage to regulators and other circuit components.
The "Circuit Integration Method" involves splitting the load of two shorted loads and running
portions of those two loads on one regulator, with the purpose of locating shorts from one load
circuit to another.
Prior to troubleshooting with the circuit integration method, the two loads involved should be
meggered between the two loads to verify that the loads are in fact shorted together. Otherwise,
the regulator used in the test will trip out in an open circuit condition, a condition to be avoided if
possible.
(1) Figure 33 illustrates a single load-to-load short. This condition is hazardous to
personnel working on both regulator A or B when the other regulator is operating. Note that the
condition with a single load-to-load short has no effect on the lights. The lights and regulators
might start behaving abnormally if grounds exist on the two circuits.
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