ARMY TM 9-6115-604-12NAVY NAVFAC P 8 633-12NOTEIf replacement is needed, FREQUENCY meter M103 and frequency transducer A103 area matched set and should be replaced as a unit.4-100. AC KILOWATTS METER M107 (6, Figure 2-2).AC KILOWATTS meter M107 Indicates the power output of thegenerator set.a.AdjustWith generator set shut down, check that AC KILOWATTS meter M107 Indicates at zero-adjust pointmarked on the face of the meter. If necessary, adjust the screw on the face of the meter to align the needle withthe mark.b.Test.(1) Start the generator set and place In SINGLE SET operation mode with constant output applied to availableand stable load.(2) Monitor kilowatt output on AC KILOWATTS meter M107 and record.(3) Monitor current output on AC AMPERES meter M102 and record.(4) Set GEN/BUS VOLTMETER switch S112 to any GEN position and record voltage output on AC KILOVOLTSmeter M1 01.(5) Monitor power factor on POWER FACTOR meter M104 and record.(6) Determine accuracy and serviceability of AC KILOWATTS meter M107 by calculation. Using the 3 phasepower equation P = E x square root of 3 pf, substitute the values obtained In steps (3) through (5), above,and determine theoretical kilowatt output in watts.(7) Compare the kilowatt output obtained In step (2), above, and the theoretical kilowatt output calculated in step(6), above. The kilowatt output of AC KILOWATTS meter M107 should be within ± 5 percent of thecalculated kilowatt output.(8) If kilowatt output of AC KILOWATTS meter Ml 107 varies by more than i 5 percent, AC KILOWATTS meterM107 or WMT transducer may require replacement. The meter movement requires one milliampere DC forfull scale meter deflection.c.Remove. See Figure 4-66.(1) Open cabinet B door. Tag and disconnect wiring from AC KILOWATTS meter M107 (5).(2) Remove mounting screws and remove AC KILOWATTS meter M107 (5) from cabinet B door.d.Install(1) Install and secure AC KILOWATTS meter M107 (5) in cabinet B door(2) Connect wiring and discard tags. Close cabinet B door.(3) Test again in accordance with step b, above If meter also fails test, refer problem to the next higher level ofmaintenance for replacement of wattmeter transducer WMT4-101. AC KILOVARS METER M108 (7, Figure 2-2).AC KILOVARS meter M108 indicates kilovar load on thegenerator G1.a.Adjust.With generator set shut down, check that needle on AC KILOVAR meter M1 08 indicates at zero-adjustpoint marked on face of meter. If necessary, adjust the screw on the face of the meter to align the needle withthe mark.b.Test.(1) Start the generator set and place in SINGLE SET operation mode with stable load.(2) Monitor kilovar output on AC KILOVARS meter Ml 08 and record.(3) Monitor kilowatt output on AC KILOWATTS meter M107 and record.(4) Monitor power factor on POWER FACTOR meter M104 and record.(5) Determine accuracy and serviceability of AC KILOVARS meter M108 by calculation. Using the equationKVA = KW/pf, substitute the values obtained in steps (3) through (4), above, and determine theoreticalkilovar amperes.4-166
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