HOUSING-ROTATING 1T1987 - Caterpillar

Introduction
The EMCP 4.4 has various paralleling capabilities which include the following:
Dead bus arbitration
Synchronizing
Load sharing
Load shed/load add
Load sense/load demandThe EMCP 4.4 provides multiple modes of operation that include the following:
Automatic synchronizing
Manual synchronizing
Sync check modeParalleling Functions
Dead Bus Arbitration
The EMCP 4.4 dead bus arbitration will select the first generator set to close to a dead bus. The EMCP 4.4 dead bus arbitration feature will allow only one generator set to close to the dead bus. This feature also minimizes the time for the first generator set to close to the dead bus.Synchronizing
The EMCP 4.4 monitors all three phases of the generator and main bus. The proprietary synchronizing algorithms drive the following functions:
The generator output frequency
The voltage
The phaseThis action allows the EMCP 4.4 to match another source, and close the generator circuit breaker when conditions have been met.Load Sharing
The EMCP 4.4 actively monitors the real (kW) and reactive (KVAR) load requirement of all paralleled generator sets. The EMCP 4.4 adjusts output of the generator set to maintain a balanced loading of all generator sets.Load Shed
The EMCP 4.4 will provide a configurable load add signal as generator set capacity becomes available. In the event of generator capacity becoming unavailable during operation, a configurable load shed signal will be provided.Load Sense/Load Demand
The EMCP 4.4 includes logic to sequence generator sets based on the total load requirement of the system. If the site load exceeds a minimum reserve kW threshold, additional generator sets will automatically start, synchronize, and close the generator breaker. If the site load falls below a reserve kW threshold, a generator set will automatically unload, open the generator circuit breaker, and shut down.Modes of Operation
Automatic Paralleling
In the automatic paralleling mode, the EMCP 4.4 controller automatically adjusts the voltage and frequency of the generator set. When the generator output is synchronized with the second source, the EMCP 4.4 controller closes the generator circuit breaker.Manual Paralleling
In the manual paralleling mode, the operator will manually adjust the voltage and frequency of the generator set. When the generator set is synchronized with the second source, the operator will initiate a generator circuit breaker close command. A sync check function is also included to prevent out of phase paralleling.Sync Check Mode
In the sync check mode, the EMCP 4.4 controller automatically adjusts the voltage and frequency of the generator set without closing the generator circuit breaker.Metering for Paralleling Functions
Bus Bar Metering
The following values are metered by the EMCP 4.4.
True "Root Mean Square" RMS voltage readout line to line (L to L).
True RMS voltage readout line to neutral (L to N). The EMCP 4.4 possesses the software that provides the capability to configure the ratio for potential tra