8421-CC-PS Bus structure module

On regulators without a trim input such as Leroy Somer AVRs, an external trim pot must be used to limit the range of the voltage bias input from the EGCP-2 control.

• Press the Enter key to save the final Volts Bias Setting 

• The EGCP-2 control will always reset to the saved Volts Bias Offset value when the generator breaker is opened. 

• Whenever the Generator set is started or taken offline, it will control at the rated voltage when calibrated correctly.

AVR DROOP

 • It is highly recommended to fit the AVR with a Droop CT input, and utilize a medium droop level on the AVR. This adds stability to the AVR for VAR/PF sharing at low loads. 

• Cross current compensation must be disabled in the AVR Droop CT circuit.

• Calibrates PT phase A voltage. 

• Adjust PT Phase A Scale until the monitored value matches the measured generator voltage on A phase.

• Calibrates PT phase B voltage. 

• Adjust PT Phase B scale until the monitored value matches the measured generator voltage on B phase.

CT Phase A, B and C Offset 

• Calibrates CT Phase A, B, or C input sensing of EGCP-2 at zero current. 

• Only calibrate when generator is operating with no load. 

• Calibrate within ±0.3 of 0.0 A. • Measure actual generator currents with clamp on ammeter, or panel ammeter. Verify 0 A on the selected phase input. 

• Calibrate selected phase CT reading in the calibration window.

• Calibrates PT phase C voltage.

 • Adjust PT Phase C scale until the monitored value matches the measured generator voltage on C phase.