HOMEYWELL CC-PAIH01 51405038-175 module

Operations Affected The Bus PT Scale calibration will affect the Voltage matching accuracy when the generator is paralleling to other generators on the isolated bus (Bus PT monitored), or when the generator is paralleling to the mains (Mains PT monitored). Improper calibration of the Bus PT sensing of the EGCP-2 may cause large reactive load swings when paralleling into the bus or mains when the generator breaker closes. Alarms Affected The Bus PT scale calibration will affect the Mains High and Low Voltage Limit alarm set points in the Shutdown and Alarms tuning menu. If the Bus PT scale is improperly calibrated, the sensed voltage for these high and low alarm set points may cause alarms and/or loss of mains action to occur at the wrong voltage levels

Speed Bias Output 

The Speed Bias Offset calibration point sets an offset on the speed bias output of the EGCP-2. This output is fed into the speed control governor to bias the governing speed for synchronization and load control functions.Increasing the Speed Bias Offset will increase the Speed Bias readout in the I/O Display status screen of the EGCP-2. The speed bias offset imposes an offset in percent of speed bias output. For example a Speed Bias offset of 3% will give a 3% speed bias reading in the I/O Display status screen. Decreasing the Speed Bias Offset has just the opposite effect in that the values will read negative instead of positive.

Voltage Bias Output 

The Voltage Bias Offset in the Calibration menu is used to impose an offset voltage on the voltage bias output to the automatic voltage regulator. This dc voltage offset is applied to the voltage bias input of the automatic voltage regulator, and is maintained as a starting point for all voltage bias operations used by the EGCP-2.Most regulators, which have a voltage trim bias input, require a 0.0 Vdc voltage bias offset. These types of regulators operate with a ±dc voltage applied to this trim input. The voltage is then centered around zero volts offset, or zero Voltage Bias.