TM 55-1520-240-23-7
9-30
ALTERNATING CURRENT (AC) POWER DISTRIBUTION
(Continued)
9-30
APU GENERATOR RETURN CURRENT
TRANSFORMERS
Return current from the APU generator circuit passes
through coils in three current transformers, inducing
voltages that are routed to the APU GCU in the right
pod, where they are used to detect ground fault currents.
They work in conjunction with three feeder current
transformers in the No. 2 PDP.
NO BREAK - WORK HARDER
The three transformers are mounted on a bulkhead at
sta. 594, just forward of the APU generator.
EXTERNAL POWER
An ac external power receptacle accepts the cable from
a power supply cart to connect 115 vac 400 Hz power to
the helicopter. The receptacle is located inside a hinged
access door at the forward end of the left pod.
9-92
