Return of Commercial (Normal) Power - TM-55-1930-209-14P-9-4

CONTROL PANEL AUTOMATIC POSITION-ENGINE DOES NOT START - TM-55-1930-209-14P-9-4_225

CONTROL PANEL AUTOMATIC POSITION-AUTOMATIC SHUTDOWN - TM-55-1930-209-14P-9-4_227

TM-55-1930-209-14P-9-4 Water Purification Barges (NSN 1930-01-234-2165) Electric Power System Manual
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CONTROL PANEL (TYPE 3) SYSTEMS OPERATION Return of Commercial (Normal) Power When commercial power returns, the automatic transfer switch transfers the load to commercial power. Remote start initiating contacts (I) open. This de-energizes run relay (RR). When run relay (RR) is de-energized, contacts (RR2) close and contacts (RR1) open. (RR2) closed completes a circuit to shut-off solenoid (SS). The shutoff solenoid moves the rack to the fuel OFF position. After the engine stops (PSW) will open to de-energize the shut- off solenoid. (RR1) open de-energizes arming relay (AR) and dual speed switch (DSS). Diode (D1) is in the shut-off solenoid circuit to help prevent electrical sparks (arching), at the shut-off solenoid contacts, when the shut-off solenoid is deenergized. 204

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