Control Cubicle Relay Assembly

Figure 3-55. Thermal Watt Converter Circuit Schematic

Cleaning, Inspection, and Repair. - TM-9-6115-464-34_187

TM-9-6115-464-34 Generator Set Diesel Engine Driven Tactical Skid Mtd 15 Kw 3 Phase 4 Wire 120/208 and 240/416 Volts Manual
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ARMY TM 9-6115-46-34 AIR FORCE 35C2—3-445-2 NAVY NAVFAC P-8-624-34 (c) Vary the load while comparing the generator set kilowatt meter reading to that of the calibrated kilowatt meter. (d) If readings vary more than 1.33 percent, install thermal watt converter in a test setup using figure 3-55 as a guide. (e) Adjust all auto transformers to the minimum position. (f) Close switch S-1 and open switches S-2 and S-3. (9) Energize Power source G-1 and adjust autotransformer T1 until 1 ampere is indicated on ammeter (h) Check indication of voltmeter V-1. Indication shall be 6.66 ± 0.04 millivolts. (i) Close switch S2 and adjust auto transformer T2 until 1 ampere is indicated on ammeter A2. (j) Check indication of voltmeter. Indication shall be 13.33 ±0.07 millivolts. (k) Close switch S3 and adjust auto transformer T3 until 1 ampere is indicated on ammeter A3. (l) Again check voltmeter indication. indication shall be 20.00+ 0.1 millivolts. (m) Replace thermal watt converter if it fails to perform as indicated. (n) If thermal watt converter performs as indicated, replace meter. (o) Refer to the Operator and Unit Maintenance Manual and install thermal watt converter. c. AC Current Meter. (1) Refer to the Operator and Unit Maintenance Manual for AC current meter adjustment, removal, cleaning, inspection, and installation procedures. (2) Test AC ammeter as follows: (a) Connect a calibrated test ammeter in series with the generator set current meter. (b) Connect a variable load to the generator set load terminal board. (c) Refer to the Operator and Unit Maintenance Manual and start the generator set. (d) Vary the load while comparing the indication of the generator set current meter to that of the calibrated test ammeter. (e) Replace generator set current meter if its indication varies more than 2 percent of full scale value from the indication of the test ammeter. d . C o n t r o l C u b i c l e R e l a y A s s e m b l y . (1) Removal. (a) Tag and disconnect electrical leads to relay assembly. (b) Remove nut and captive washer assemblies (1, figure 3-56) to remove relay assembly (2). (2) Disassembly. NOTE Test relay assembly as outlined in subparagraph d. (5) below prior to disassembly. (a) Identify any parts removed to facilitate assembly. (b) Disassemble relay assembly only as is necessary to replace damaged or defective parts. (c) Remove nut and captive washer assembly (1 and 2, figure 3-57), screw (3) and terminal board (4). 3-132

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