200 kW TACTICAL QUIET GENERATOR SET
OPERATION UNDER USUAL CONDITIONS Continued
PARALLEL UNIT OPERATION (LOAD SHARING) Continued
Operation in AUTO Mode
When paralleling a 200 kW TQG to a 100 kW TQG that is supplying a load, an unstable condition
can occur. This condition does not occur when paralleling at no load or when paralleling a 100 kW
TQG to a 200 kW TQG that is supplying a load.
When you connect a 200 kW TQG to the load bus with a 100 kW TQG already under load and the
load sharing becomes unstable you should immediately disconnect the 100 kW TQG from the load
bus to prevent damage to equipment by setting the 100 kW TQG AC CIRCUIT INTERRUPTER
switch to OPEN. The 100 kW TQG should then be synchronized to the load bus and the AC
CIRCUIT INTERRUPTER switch set to CLOSED.
Perform INITIAL ADJUSTMENTS BEFORE USE AND SELF-TEST procedures (WP 0006 00-10).
On each generator EMCP, set ENGINE CONTROL switch to MANUAL START and start each set.
Rotate VOLTAGE adjust potentiometers to obtain same voltage indication on each set.
Rotate FREQUENCY adjust potentiometers to obtain same frequency indication on each set.
Ensure that all external load contactors between the generator sets and the load are open.
On TQG No. 1 EMCP, set SYNC MODE switch to AUTO. The AC CIRCUIT INTERRUPTER will close and indicator
On TQG No. 1 GSC panel keypad, press and hold POWER METER to display %kW continuously on the lower display.
Set UNIT/PARALLEL switch on both units to PARALLEL.
If square symbol
on synchroscope (lower display) does not stop at center and synchronizing
lights (~V, HZ, and
) on left side of GSC panels on paralleling generator sets do not glow
steady yellow, the voltage, frequency and phasing are wrong and must be corrected. Failure to
observe this caution can result in damage to generator sets.
When generator sets are operated in parallel, a switch or external load contactor should be placed between
the generator set and load to connect and disconnect power.
on synchroscope (lower display) does not stop at center and synchronizing lights (~V, HZ, and
If square symbol
) on left side of GSC panels on paralleling generator sets do not glow steady yellow, shut down the generator
10. Check that load cables are connected properly.
11. Repeat steps 1 thru 8 above.
12. On TQG No. 2 EMCP, set SYNC MODE switch to AUTO. Set will automatically synchronize and close AC CIRCUIT