CONTROL AS- 3791296 - Caterpillar

Procedure T
2301 Operating Conditions
Mounting Locations
The 2301 Control is designed to operate within a temperature range of -40 to 71° C (-40 to 160° F). The unit may be mounted in any position if the required ventilation is available for cooling, and it is not in a high vibration area.Do not mount the control near very high temperature areas or near auxiliary electrical equipment. It must not be mounted on the engine, and should have space available for servicing and repair.Electrical Connections
Wiring diagrams for Service Procedures A and B shows all external wiring connections of a typical control installation. Be sure to follow all shielding requirements. The information that follows gives additional specific wiring instructions. Shielded WiringAll shielded cable must be twisted conductor pairs. Do not try to tin the braided shield. All input control wires should be shielded. (See wiring drawing for shielding requirements.) This prevents any effects from outside signals (EMR) caused by other electronic equipment near the cable. Connect one point of the shield to the system ground (chassis) at the control end only. The end away from the control should be left open. Do not run shielded wires in the same conduit with cables that carry high current. Potential Transformer (PT) Connections (Parallel Unit Only)Connect the potential transformer (PT) secondary leads to the following terminals: Phase A to T1, Phase B to T2, Phase C to T3. The PT secondary line-to-line voltage must be 90 to 240 Vrms. Make reference to the typical wiring diagram in Service Procedure B.Procedure U
Incompatibility of Multiple Load Sharing Control Units
When multiple (two or more) generator sets are run in parallel to produce a combined output, each engine must be controlled the same for the correct total output. If the engines being paralleled drop off the line due to excessive reverse power as soon as the breakers are closed, then governor incompatibility (not able to function together correctly) could be the cause.Measure the voltage at each of the 2301 Controls between terminals T13 (negative supply voltage) and terminal T11 (paralleling line common). These voltages must be within 2 volts of each other. If one of the control units does not measure within two volts of the others, this control may be the cause of the paralleling problem. Use a solid connection (no contacts) to connect terminal T11 of all 2301 Controls together.When this system is used, the procedure that follows is necessary to avoid system instability. If it becomes necessary to remove power from any one of the controls during operation of the other engine(s), both the positive (+) and the negative (-) connections must be disconnected from that control at the same time. A double pole switch is required for this operation. See the Wiring Diagram that follows for correct installation of the switches. For terminal T25 connection shown, see Service Procedure F for correct controls.
PARALLELING LINE COMMON HARDWIREDProcedure V
Overvoltage Protection For Woodward 2301 Governors
The 4W5391 Preregulator is a device to limit supply voltage to 36 2 volts.