BUSHING 2S0253 - Caterpillar

Set up for Multi-unit Paralleling
For island paralleling mode, all units must be interconnected with control wiring for proper load sharing and control functions. All connections are made in the customer connection box.Review what type of control system is used in each unit that will be paralleled together. Reviewing the control system is the first step in determining how to interconnect units.Using 24 Pin Interconnect Harness
Install the factory-supplied 24 pin interconnect harness beginning at connector B (lower) on the first unit to connector A (upper) of the next unit. Continue in this fashion until all Units are connected together. No other interconnect control wiring is required.Dead bus arbitration - When starting the group of units, the first unit up to rated voltage and frequency will close to the dead bus. Remaining units synchronize to the live bus.Load sense/load demand - Automatically regulates which units to be running and paralleled on the common bus based on the load level. Higher load levels will require more units to run, lower load levels will require fewer units to run. To use this feature, each unit must be configured uniquely. Refer to Special Instruction, LEBE0007, "EMCP 4.4 Application and Installation Guide". This feature is disabled as factory default.Group start - Allows for starting the entire group of units by wiring the remote start contact to a single unit within the group. In order to use this feature, connect a remote run request contact to terminals GRR+ and GRR- on any one unit.Real power (kW) sharing - Automatically shares the load (kW) proportionally among all paralleled units.Reactive power (kVAr) sharing - Automatically shares reactive load (VAr) proportionally among all paralleled units. Uses a 0-10V analog signal which is not designed to interface to any devices other than EMCP 4.4.Manual Operation
The power module can be used in parallel with other units to provide power for an isolated load. Manual operation refers to manually closing the generator breaker using the circuit breaker switch. The following information describes the steps for manual operation.
Ensure that all load cable connections have been correctly made.
Verify that the unit can be safely started.
Verify that power can be applied to the load.Start Up Procedure for the First Unit
The following procedure applies to the first or primary unit that will be closing to a dead bus.
Press the "RUN" button that is on the EMCP 4.4.Note: The engine will begin to start immediately.
Use the EMCP 4.4 display to observe the generator voltage and the frequency once the engine is running at the rated speed.Note: The sync mode setting in the EMCP 4.4 will automatically change to "Check" mode when the EMCP 4.4 powers up. Additionally, the sync mode setting will automatically change to "Check" mode whenever the EMCP 4.4 "STOP" button is pressed. "Check"mode causes automatic generator-to-bus synchronization (not applicable in "Single Unit Mode") but requires manual closing of the generator breaker using the circuit breaker switch.Note: If the manual voltage and/or frequency adjustment (prior to breaker closing) is desired, then change the EMCP