TM 9-6115-604-34
NAVFAC P-8-633-34
(4)
If the two frequency indications differ by not more than 1.2 hertz, then there is nothing wrong with the functioning
< of transducer Al 03 or Ml 03. Proceed as follows:
(a)
Shut down the generator set in accordance with the Operator and Organizational Maintenance Manual.
(b)
Disconnect and remove the frequency counter from the generator set circuit.
(c)
Restore the generator set circuit by reconnecting the input signal line from T104 to Al 03.
(5)
If the two frequency indications differ by more than 1.2 hertz, then frequency transducer Al 03 and frequency
meter Ml 03 must be removed and replaced as a matched set Proceed as follows:
(a)
Shut down the generator set in accordance with the Operator and Organizational Maintenance Manual.
(b)
Disconnect and remove the frequency counter from the generator set circuit
(c)
Remove and replace HERTZ meter Ml03 in accordance with the Operator and Organizational Maintenance
Manual.
(d)
Remove and replace frequency transducer Al 03 in accordance with step f, below.
f. Frequency Transducer Al03 Removal and Installation.
NOTE
Frequency meter M103 and frequency transducer A103 are a factory matched set Replacing
transducer requires replacing meter.
(1)
Remove. See Figure 1 0R8.
(a)
Tag and disconnect wires from frequency transducer Al 03 (6).
(b)
Remove hexagon head capsews (3), lockwashers (4), and hexagonal nuts (5) to remove frequency
transducer A103 (6).
(2)
Install. See Figure 10-8.
(a)
Install frequency transducer Al 03 (6) and secure with hexagon head capscrews (3), Iockwashers (4), and
hexagonal nuts (5).
(b)
Make wiring connections to frequency transducer Al 03 (6) as tagged. Remove and discard tags.
g. Power Factor Transducer PFT On Equipment Test.
WARNING
Do not work on energized equipment Generator set must be shut down. reducer 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, interconnect generator set output cable assemblies with a 750 kW load bank
having variable resistance and variable reactance. Set the load bank for 750 kW, purely resistive.
(2)
With upper cabinet B door dosed, start the generator set and dose it onto the load in accordance with the
Operator and Organizational Maintenance Manual.
(3)
Verify that POWER FACTOR meter M104 reads "1.0n and that AC AMPERES meter M102 reads 100 to 110
amperes.
(4)
Without decreasing load bank resistance, increase the reactance of the load bank until AC AMPERES meter Ml
02 reads 130 amperes.
(5)
Verify that POWER FACTOR meter Ml 04 reads 0.78 to 0.82, lagging.
(6)
Shut down the generator set in accordance with the Operator and Organizational Maintenance Manual.
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