ARMY TM 9-6115-60412
NAVY NAVFAC P-8-633-12
POWER FACTOR Meter M104R (4. Figure 5-2). POWER FACTOR meter M104R indicates the power
factor of generator G1 output.
Adjust. Zero Adjust POWER FACTOR meter M104R. An adjustment screw on the face of POWER
FACTOR meter M104R Is used to zero the meter when it is not energized.
(a) Start the generator set and set for REMOTE SINGLE SET mode in accordance with Figure 2-22
with constant output applied to any available stable load.
(b) Monitor the following quantities off the appropriate RCM meters and record.
Power factor (Pf) readout off POWER FACTOR meter M104R.
Voltage (E) output readout off AC KILOVOLTS meter M101R.
Current (I) output readout off AC AMPERES meter M102R.
Kilowatt (P) readout off AC KILOWATTS meter M104R.
(c) Determine accuracy and serviceability of POWER FACTOR meter M104R by calculation using
quantities recorded In step (b), above. Calculate theoretical power factor using the following 3
phase power equations:
(d) Compare calculated power factor against the actual readout of POWER FACTOR meter M104R.
Meter movement requires ± 0.5 milliamperes DC for full scale meter deflection.
Shut down the generator set. See Figure 2-23.
Open the RCM panel by unlocking three oval studs across the top of the panel.
Tag and disconnect wires from POWER FACTOR meter M104R (4, Figure 5-2) terminals.
Refer to Figure 5-2 Remove nuts and lockwashers from POWER FACTOR meter M104R (4)
mounting studs and remove meter.
Remove nuts and lockwashers from mounting studs of replacement meter M104R (4), if Installed.
Install replacement POWER FACTOR meter M104R (4) and secure with nuts and lockwashers.
Connect wires to M104R terminals as tagged. Remove and discard tags.
Close RCM panel and secure by locking three oval studs across the top of the panel.
SYNCHROSCOPE M106R (6. Figure 5-2). The SYNCHROSCOPE indicates the phase relationship between
the bus and the generator to be paralleled.
Test. Synchroscope M106R can be checked while on the RCM by monitoring the scope and synchronizing
lights DS110R and DS111R. This procedure will require two generator sets, one (one-line), to provide
bus voltage for phase comparison against the output of the Incoming set where remote synchroscope is
Set up two generator sets for remote parallel operation. Start online generator set (to provide bus
voltage) in accordance with paragraph 2-4. Start up incoming set (remote synchroscope under test)
and set for parallel operation at a slightly higher frequency then the online set.
Set SYNCHROSCOPE switch S115R on incoming set (under test) to ON Monitor SYNCHROSCOPE
M106R and SYNCHRONIZING LIGHTS DS110R, DS011R on its RCM. Synchroscope pointer
should start rotating and SYNCHRONIZING LIGHTS DS1110R, DS111R should start blinking. With
incoming set operating at a higher frequency SYNCHRONIZING LIGHTS DS110R and DS111R
should be glowing light and dark. SYNCHROSCOPE meter M106R pointer should rotate in the
clockwise (FAST) direction and should pass through the 12 o'clock position when the
SYNCHRONIZING LIGHTS DS110R and DS111R are dark.