Figure 10-9. Current Transducer AMT, On Equipment Test Setup

TM-9-6115-604-34 Generator Set Diesel Engine Driven Tactical Skid Mtd 5 Kw. 1 Phase-2 Wire 1 Phase -3 Wire 3 Phase -4 Wire 120. 120/240 and 120/208 Volts Manual
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TM 9-6115-604-34 NAVFAC P-8-633-34 10-6. TRANSDUCER TESTS. This paragraph contains detailed on-equipment and bench tests for transducers AMT, A103. PFT, and WMT. Not all of the transducers have both on equipment and bench tests. a. Current Transducer AMT On Equipment Test. WARNING Do not work on energized equipment Generator set must be shut down. Transducer voltage and current Inputs and outputs are hazardous. Performing maintenance on energized transducers may result In Injury or death. (1) With the generator set shut down, set LOCAL REMOTE switch S2 to LOCAL and AMMETER switch S114 to “1”. (2) Open upper cabinet B door. See Figure 10-9. Connect a microammeter into the line connected to AC AMPERES meter M102 terminal "I". (3) With the generator set connected to a known, balanced load, start the generator set and close it onto the load bus in accordance with the Operator and Organizational Maintenance Manual. (4) Record the microampere reading at each AMMETER switch setting, i.e., 1", "2, and "X. Figure 10-9. Current Transducer AMT, On Equipment Test Setup (5) Shut down the generator set in accordance with the Operator and Organizational Maintenance Manual. (6) Compute an expected microammeter reading using the following formula: æAe =Lk where æAe is the expected microammeter reading in microamperes and Lk is the known load in the generator set in kilowatts. (7) Compare readings recorded in step (4), above, with expected readings computed in step (6), above. (a) actual readings agree with expected reading within::2 microamperes, then transducer AMT is functioning properly and AC AMPERES meter Ml 02 should be giving accurate readings at 2 percent accuracy or better. (b) If actual readings differ with expected readings by more than 2 microamperes, then transducer AMT may be defective. Proceed as follows: 1 Remove transducer AMT in accordance with step b, below. 2 Bench test transducer AMT in accordance with step c, below. 3 Reinstall transducer AMT (or replace, i defective) in accordance with step d, below. 10-18

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