Operating Generator Sets in Parallel - TM-9-6115-661-13-P0075

TM 9-6115-661-13&P

1. To shut down generator set, place AC CIRCUIT INTERRUPTER switch in the OPEN position.

m. On the switch box place ON LINE switch for the generator which is on line (3 or 6) to the OFF

position.

NOTE

At this time, allow generator set to operate five minutes with no load

applied.

n. On the generator set control panel rotate the MASTER SWITCH to the OFF position.

2-5.3.2 Operating Generator Sets in Parallel. The generator sets can be operated in parallel through

the switch box or at the generator set load terminals. When paralleling at the generator set load

terminals, refer to paralleling procedures in TM 9-6115-643-10. When paralleling at the switch box,

perform the following procedures:

Prior to making any connections for parallel operation, ensure that there is

no input to the load and that the generator sets are shut down. Failure to

observe this warning can result in serious injury or death by electrocution.

WARNING

Never attempt to start the generator set if is not properly grounded.

Failure to observe this warning can result in serious injury or death by

electrocution.

Ensure that load requirement is equal to or below the combined rated capacity of the two generator

sets.

Perform the Preventive Maintenance Checks and Services (PMCS) listed as BEFORE in table 2-2.

Install load and paralleling cables.

CAUTION

Do not close the AC CIRCUIT INTERRUPTER switch (13) on either of

the generator sets or close the load contactor at load until specifically

directed to do so. Closing any of these devices at any other time may

severely damage one or both of the generator sets.

Refer to paragraph 2-5.3.1 (step c through g) to a generator set and bring it on line.

On operating generator set (generator set 1) position UNIT-PARALLEL switch (16) to PARALLEL.

Start generator set 2 and adjust voltage and frequency to match generator set 1.

At switch box, set generator set 2 ON-OFF switch (3 or 6) to ON (Switch box STATUS & ON-LINE

lights for both generators should be lit).

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