BOLT 4D5768 - Caterpillar

Introduction
This control panel (part number 4P4780) is being produced to provide an SI control panel for SI generator set packages.This panel (4P4780) provides the capability of changing from a manual start/stop panel to an automatic start/stop panel by simply switching modules and reconnecting some wiring at the control panel terminal strip. Also the panel can be equipped with the 2301 governor, the Caterpillar Inc. Digital Electronic SI Fuel System, or 1724/8290 governor mounted inside of the panel. The panel can be used on energize to run systems only.The uses of the generator mounted control panel are: To help control the electric power made by the generator set.To monitor the operation of the generator set.To help protect the generator set engine from damage caused by low oil pressure, high coolant temperature, overspeed and overcrank.To help with the transfer of electrical load to and from the generator set.To help manually parallel two or more units onto the same bus.Automatic Start/Stop Control Panel
For abbreviations list, and schematics and wiring diagrams refer to the section Schematic And Wiring Diagrams in this manual.The automatic start/stop system is normally used for standby operation. The generator set must start, pick up the load, operate at load, and stop after the load is removed. An automatic transfer switch controls the transfer of load to and from the generator set. When normal (commercial or utility supplied) power has a failure, initiating contactor (IC) which is part of the automatic transfer switch, closes. This will begin the automatic start sequence. When the engine starts, the control panel instruments will show voltage and frequency. The automatic transfer switch will transfer the load to the generator set when voltage and frequency reach approximately rated value. When normal power returns, the automatic transfer switch will transfer the load back to normal power and the initiating contactor (IC) will open. This will begin the automatic stop sequence. The generator set will also stop automatically if the engine has a monitored failure. For specifications on components located on the engine, make reference to the Engine Service Manual.The automatic start/stop panel will shut down the generator set when a monitored engine fault occurs. At the same time, it will indicate by a fault lamp whether the fault is due to high water temperature, low oil pressure, overcrank or overspeed.The automatic start/stop panel can be used on engine systems that are energized to run (ETR) only.
(1) Emergency stop pushbutton (ESPB). (2) Overcrank light (OCL). (3) Overspeed light (OSL). (4) High water temperature light (WTL). (5) Engine control switch (ECS). (6) Low oil pressure light (OPL).Engine Start-Up
The engine can be started (and shut down) with the engine control switch (ECS) in the following positions: 1. In the AUTO position, start-up and shut down depends on the closing and opening respectively of a remote start initiating contact (IC) (line 27) (except in the case of a fault where shut down is automatic).2. In the MAN position, start-up depends on the operator turning the engine control switch (ECS);