3BSE018100R1 PM860K01 Control processor module

Menus Affected Changes in the calibration value will change the C phase current readout in the Generator Status screen. Changing this value will also have an effect on the generator kVA, kW, and kVAR levels. Operations Affected Generator Current is used in real and reactive load calculations. These calculations are used in all real and reactive power control functions. Alarms Affected The generator current on C phase is monitored and used as an input for the Overcurrent alarm. The EGCP-2 uses all three phase CT inputs for sensing overcurrent conditions, and selects the phase with the highest current at any given moment. Improperly calibrated A phase CT levels will affect the point of Overcurrent detection on the generator. The A Phase CT calibration has an effect on kW and kVAR levels for the C phase, and for the sum of all three phases of the generator. This calibration point affects the various alarm set points that monitor real and reactive load levels.

Calibration of the Bus PT The bus PT

 input to the EGCP-2 plays a “dual role” in that it is used to sense both the bus, and the mains PT voltage sensing. The EGCP-2 automatically switches between the Bus and the Mains PT input when performing mains monitoring, synchronizing and dead bus closing actions.The generator current on C phase is monitored and used as an input for the Overcurrent alarm. The EGCP-2 uses all three-phase CT inputs for sensing overcurrent conditions, and selects the phase with the highest current at any given moment. Improperly calibrated C phase CT levels will affect the point of Overcurrent detection on the generator. The C Phase CT calibration has an effect on kW and kVAR levels for the B phase, and for the sum of all three phases of the generator. This calibration point affects the various alarm set points that monitor real and reactive load levels.

Mains Voltage Sensing

 The Bus PT input is used as part of the sensing, which determines when the mains voltage is within spec as shown in the System Status Screen by two plus symbols (++) following the MAINS label. The Synchroscope Status screen will monitor the Mains voltage in every synch mode except “Close Gen Bkr”. In the “Close Gen Bkr” mode it monitors the Bus voltage. Bus Voltage Sensing The Bus PT input is used when synchronizing across the generator breaker to the bus (live or dead bus closing). The Synchroscope status screen will display the Bus voltage at the “Mains VL-L:” value when performing Close Gen Breaker Functions.