D330, D333, 3304, 3306 – Automatic Start-Stop


AUTOMATIC START-STOP SYSTEM COMPONENT LOCATION DIAGRAM

This describes a typical application of the automatic start-stop system for diesel engines.

NOTE: The natural gas engine automatic start-stop system operates similarly. The difference is that engine shutdown is accomplished by, grounding the ignition system and, a solenoid operated valve closing in the fuel supply line.

The system automatically starts an unattended engine and takes over the electrical or mechanical load from the commercial power source. Also, the engine automatically shuts down, either after the load is transferred back to the commercial power source, or in the event of high water temperature, low oil pressure or an overspeed condition while the engine is running.

The automatic start-stop system contains three main wiring circuits:

… Commercial power source.
… Electric set or power unit.
… Cranking panel, starting motor and battery.
The three circuits terminate at the automatic transfer switch. This is a throw-over switch between the load and the electrical power source.

A commercial power activated relay in the transfer switch closes when commercial power source is interrupted and the diesel engine starting operation begins.

The diesel electric set then supplies emergency power during the commercial power interruption. When commercial power is restored, it is automatically connected to the load by the transfer switch and the diesel engine shuts down.


TRANSFER SWITCH

Equipment on engines equipped with the start-stop system includes:

FPS. Fuel Pressure Switch (most models)WT. Water Temperature Contactor SwitchOPS. Oil Pressure Contactor SwitchSM. Starting MotorMS. Magnetic SwitchOS. Overspeed Contactor SwitchTSI. Terminal StripRS. Shutoff Rack Solenoid
Each of the engine mounted shutoff components are explained and illustrated in separate topics.


AUTOMATIC START-STOP CRANKING PANEL
1. Signal lamp. 2. Manual-Automatic switch. 3. On-Off-Stop switch.

The standard Cranking Panel has an On-Off-Stop switch, Manual-Automatic switch and a single red lamp lens to signal a safety shutdown regardless of cause. Attachments to the cranking panel are discussed after standard panel operations are covered. The internal components are keyed to illustrations as follows:

RR. Run RelayAR. Auxiliary RelaySR. Shutdown RelayIR. Initiating RelayOCT. Overcrank TimerSW-2. On-Off-Stop SwitchSW-1. Manual-Automatic SwitchD. Diode
The following description of operation refers to illustrations for the D330C and D333C Engines.


D330C AND D333C ENGINE CONTROL PANEL SET FOR AUTOMATIC START-STOP CONTROL (SWITCH SW-2 AT “ON” AND SWITCH SW-1 AT “AUTOMATIC”)
Control Panel Equipped with Run Relay (RR)

These illustrations are intended as schematic representations of the operation of the standard cranking panel equipped with RR relay. They are NOT intended to be used as complete wiring diagrams.


D334 ENGINE CONTROL PANEL SET FOR AUTOMATIC START-STOP CONTROL
Control Panel Not Equipped with Run Relay (RR) and Engine Not Equipped with Fuel Pressure Switch (FPS)


G333 ENGINE CONTROL PANEL SET FOR AUTOMATIC START-STOP CONTROL
Control Panel Not Equipped with Run Relay (RR) and Engine Not Equipped with Fuel Pressure Switch (FPS)

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