Manual 26059 EGCP-1 Engine Generator Control Package
Woodward 97
CT Phase C Scale
Calibrates the C phase generator CT input.
Menus Affected
Changes in the calibration value will change the C phase current readout in both
the Generator Overview and Generator Phases status menus. Changing this value
will also have an effect on the generator KW and KVAR levels.
Alarms Affected
The generator current on C phase is monitored and used as an input for the
Overcurrent alarm. The EGCP-1 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 affect on KW and KVAR levels for the B
phase, and for the sum of all three phases of the generator. The various alarm
setpoints which monitor real and reactive load levels are affected by this
calibration point.
Calibration of the Bus PT
The bus PT input to the EGCP-1 plays a “dual role” in that it is used to sense
both the bus, and the mains PT voltage sensing. The EGCP-1 automatically
switches between the Bus and the Mains PT input when performing mains
monitoring, synchronizing and dead bus closing actions.
Bus PT Scale
Calibrates the Bus and Mains Voltage readouts on the EGCP-1.
Menus Affected
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 Control Overview Menu by a
sinusoidal wave under the MAINS label. The Bus PT also monitors the mains
when paralleling the generator to the mains in mains parallel applications. The
U: value in the Synchroscope status menu will reflect the Mains voltage when
operating in a Close Mains Breaker mode.
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 menu will display the
Bus voltage at the U: value when performing Close Gen Breaker Functions.
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