VOLT ADJ RHEOSTAT R101

Figure 4-70. Test Data for GEN/BUS VOLTMETER Switch S112

Figure 4-71. Test Data for PARALLEL Switch S6

TM-9-6115-604-12 Generator Set Diesel Engine Driven Tactical Skid Rtd. 60 Kw 3 Phase 4 Wire 120/208 and 240/416 Volts Manual
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ARMY TM 9-6115-604-12 NAVY NAVFAC P 8 633-12 c. Install. See Figure 4-66. (1) Install GEN/BUS VOLTMETER switch Si12 (10) by positioning switch sections at rear of cabinet B door and assemble the mounting plate from the front. Secure the entire assembly with the three mounting screws. (2) Replace switch handle in the OFF position ensuring that shaft is In the OFF position. Secure handle with attaching screw. (3) Connect wires and discard tags. 4-108. VOLT ADJ RHEOSTAT R101 (26, Figure 2-2). VOLT ADJ rheostat R101 is used to manually adjust voltage out-put of generator G1. a. Test. (1) Remove wire from terminal 3 of VOLT ADJ rheostat R101. (2) Rotate knob fully counterclockwise. (3) Set a multimeter to RX1 scale and check for continuity across terminals 1 and 2. Maximum resistance should be 1 ohm. (4) Reset multimeter to RX1 K scale. While observing the multimeter indication, slowly rotate knob in a clockwise direction. Meter resistance indication should increase smoothly, with no erratic jumps at any point in travel. (5) When knob (wiper arm-terminal 2) is in the fully clockwise stop position, total resistance indication should be 500 50 ohms. (6) Connect wire removed from terminal 3. b. Remove. See Figure 4-68. (1) Tag and disconnect wiring to rheostat (8). (2) Remove knob (7). (3) Loosen and remove locking nut at front of cabinet B door and remove assembly from the rear. c. Install. See Figure 4-68 (1) Install VOLT ADJ rheostat R101 (8) from the rear of cabinet B door and secure in position so that when knob (7) is attached, with shaft rotated fully counterclockwise, the arrow Is at 9 o'clock position. (2) Secure knob (7). (3) Connect wires and discard tags. 4-109. PARALLEL SWITCH S6 (18, Figure 2-2). PARALLEL Switch S6 is a two-section, or deck, rotary switch with handle spring return to normal-vertical position following a command operation. The switch is used to select either single or parallel generator set operation. NOTE Switch wiring position numbers are translated as follows: the first digit defines the section, or decks, In relation to the handle end, the second digit is a specific terminal on that deck. For example, position 23 is located on the second deck, the contact is terminal number 3. a. Test. (1) Tag and disconnect wiring to switch contacts. See Figure 4-71 (2) Set a multimeter to RX1 scale and test for contact continuity in the switch positions specified in chart in Figure 4-71 Meter should indicate zero ohms at all points marked in the chart. (3) Multimeter should indicate infinity at all blank contacts in the chart. (4) Rotate handle to the SINGLE position and release handle. Handle should return to the normal-vertical position automatically. (5) Repeat step (4), above, with handle rotated to the PARALLEL position. 4-174

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