DynaGen ES53 Installations- und Benutzerhandbuch - Seite 16

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LOGIC SEQUENCE

Upon a fault of the utility source, the control module proceeds to a preheat function, which acts

both to energize a preheat element on a diesel engine (if equipped) and also acts as a delay to

engine starting (TDES). This time delay prevents unnecessary engine starting and is adjustable

from 0 to 32 seconds. If during the TDES the utility source returns to normal, the control

module simply returns to a monitoring mode.

After the expiration of the preheat/TDES delay, the control module proceeds to crank the engine.

Once the engine starts, the control module proceeds to the time delay normal to emergency

(TDNE). This fixed 4 second time delay begins timing immediately after the engine running

LED illuminates (speed exceeds crank disconnect setting). After the time delay has lapsed, the

control module ensures that the generator frequency is within normal limits (> 55 HZ for 60 Hz

systems, and > 45 HZ for 50 Hz systems). If the generator frequency is within normal limits the

control module signals the transfer switch to immediately transfer to the generator source of

supply.

Once the transfer switch has transferred to the generator source of supply, the control module

then monitors the remote start contacts for a return of the utility. If the utility returns to normal

while the generator is running, the control module proceeds to a 3 minute delay. This is referred

to as time-delay-emergency-to-normal (TDEN). After the TDEN delay, the control module

proceeds to signal the transfer switch to transfer to the utility source of supply. NOTE: If during

the TDEN the utility falls out of the acceptable range again, the control module simply returns to

a normal operation state, and will continue to watch for a return of the utility source and

maintain operation from the generator.

When the TDEN has lapsed, the control module proceeds to initiate transfer to the utility source.

The control module then proceeds to an engine cool-down (TDEC) period. The control module

will continue to run the engine unloaded for a period of 5 minutes. If the utility fails during this 5

minute period (remote start contacts close), the control module proceeds to transfer back to the

generator source after a delay period of 4 seconds.

The user may perform a manual operation of the generator set by placing a user-installed AUTO-

OFF-TEST switch in the TEST position. The control module will proceed to activate the

preheat/TDES. Next, the controller will proceed to crank the engine. However, the transfer

switch will not transfer to the generator source provided the utility source is available. The utility

will always take priority over the generator source. Therefore, during manual starting, the

transfer switch will always stay in the utility position as long as the utility is available. If during

manual operation there is a power failure, the control module will delay a period of 4 seconds

before transferring to the generator.

Should an engine failure occur such as low oil, high temp, overspeed, overcrank, etc, the control

module will latch the fault condition. During this latched state, should the utility return, the

transfer switch will immediately switch back to the utility source to maintain power as soon as

possible to the loads.

Installation and User Manual for the ES53 Control Module