ARMY TM 9-6115-604-12NAVY NAVFAC P 8 633-124-107. GEN/BUS VOLTMETER SWITCH S112 (24, Figure 2-2).GEN/BUS VOLTMETER switch S112 is a two-section,rotary tap-switch contact design An integral detent assembly provides positive click stops at all eight positions. Theswitch is used in conjunction with AC KILOVOLTS meter M101 to select any one of the three generator phases at eitherthe generator G1 or at the bus to check for voltage levels.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 3.a.Test.(1) Tag and disconnect wiring to switch contacts See Figure 4-70.(2) Set a multimeter to RX1 scale and test for contact continuity in the switch positions specified in chart inFigure 4-70. Meter should indicate zero ohms at all points marked in the chart.(3) Multimeter should indicate Infinity at all blank contacts in the chart.b.Remove. See Figure 4-66.(1) Remove screw in center of handle and slide handle off shaft.(2) Remove three screws from face of mounting plate on front of door (10) Switch sections can be removed atrear of cabinet B door as an assembly.Figure 4-70. Test Data for GEN/BUS VOLTMETER Switch S1124-173
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