Table 3-2. AC Power Distribution Circuit-Breakers
at 115 V ac
1, 2, 3
1, 2, 3
(1) Circuit Breaker CB1 Distribution. When UYH-1 circuit breaker CB1 is set to on (in), the phase-one
input passes through connector pin J3-T to external equipment in the system.
(2) Circuit Breaker CB2 Distribution. When UYQ-10 circuit breaker CB2 is set to on (in), the phase-
three input passes through connector pin J3-B to external equipment in the system.
d. RFI Filter Assembly. Refer to figure FO-2. The RFI filter assembly contains filters FL1 thru FL6 and
interlock jumpers on connector J10. Filters FL1 through FL5 receive +28 V dc from circuit breakers CB9,
CB18, and CB12 through CB14. Filter FL6 receives ground from relay K4. The filters reduce fluctuations
caused by circuit breaker and/or relay operation. The interlock jumpers between connector pins J10-E and J10-
S, J10-D and J10-M, and J10-C and J10-H protect overtemperature circuits to three external units. If connector
J10 is removed, the interlock circuits are opened and the external units cannot operate.