ARMY TM 9-6115-604-12NAVY NAVFAC P 8 633-124-105. BREAKER CONTROL SWITCH S4 (20, Figure 2-2).BREAKER CONTROL switch S4 is a three-section (ordeck) rotary, dual contact design. The chart In Figure 4-67 specifies contact continuity in both positions, TRIP andCLOSE. BREAKER CONTROL switch S4 is used to energize close and trip coils of load circuit breaker C8101.Figure 4-67. Test Data For BREAKER CONTROL Switch S4a.Test.(1) Tag and disconnect wiring to BREAKER CONTROL switch S4.NOTESwitch wirng position numbers are translated as follows: the first digit defines thesection, or deck, in relation to the handle end, the second digit is a specific terminal onthat deck. For example position 23 is located on the second deck, the contact isterminal number three.(2) Set a multimeter to RX1 scale and, test for contact continuity in the switch positions specified. Meter shouldindicate zero OHMS at the points marked in chart in Figure 4-67.(3) Multimeter should indicate Infinity at all open contacts In chart in Figure 4-67.NOTEAn integral spring return mechanism returns the handle to the normal-vertical positionexcept in the pull-to-lock position Slip contacts are Incorporated to maintain contactclosure in the last commanded position. These slip contacts are also used for the greenand red breaker Indicator lights DS33 (OPEN) and DS34 (CLOSED).(4) The target window opening on the face of the switch plate should show green when last command operationwas TRIP.(5) Target window should show red when last command operation was CLOSE.(6) Switch handle should always return to normal-vertical position following either command operation, TRIP orCLOSE.(7) Failure to meet any of the above requirements necessitates replacement of BREAKER CONTROL switch S4(20, Figure 2-2).4-169
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