TM 55-1520-240-23-7
9-1
DIRECT CURRENT (DC) POWER DISTRIBUTION SYSTEM
(Continued)
9-1
If the detection circuit determines that TR output is not
acceptable, no output from the TR is applied to the APP
RCCO, the internal main contactor is not energized,
isolating the TR from the aircraft dc bus. When this
happens, TR failure relay 161K5 (No. 1) or 161K6 (No.
2) is de-energized, lighting the relevant RECT OFF light
on the master caution panel and energizing dc bus tie
relay 161K8. Energizer 161K8 connects the No. 1 and
No. 2 dc busses, allowing both to be powered by the
operating TR.
9-14
