Cleaning. Inspection. and Testing

Figure 3-107. Routing of Generator Leads Through Current Transformers

Figure 3-109. Current Transformer Test Point

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 9-6115-464-34 AIR FORCE TO 35C2-3-445-2 NAVY NAVFAC P-8-624-34 Figure 3–108. Transformer assemblies, Removal and Installation b. Cleaning. Inspection. and Testing. (1) Clean transformer assemblies with a clean, lint-free cloth moistened with an approved solvent and dry thoroughly. (2) Inspect transformer assemblies for cracks, corroded terminals, and evidence of shorting. (3) Test current boost transformer as follows: (a) Using an ohmmeter, check resistance between terminals A1 and A2, B1 and 62, and C1 and C2, figure 3-109. Resistance shall be 0.19 ohm in each case. (b) Apply 7V-60 Hz to secondary winding. Excitation current shall be 0.075 amp (maximum). (4) Test instrumentation transformer as follows: (a) Using an ohmmeter, check resistance between terminals A1 and A2, B1 and B2, C1 and C2 (figure 3-102). Resistance shall be 0.11 ohm in each case. (b) Apply 10V-60 Hz to secondary winding. Excitation current shall be 0.050 amp (maximum). (5) Test cross-current compensation transformer as follows: (a) Using an ohmmeter, check resistance between terminals. Resistance shall be 0.3 ohm. (b) Apply 10V-60 Hz to secondary winding. Excitation current shall be 0.050 amp (maximum). (6) Replace defective or damaged transformers. 3-233

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