ABB 3HNE00001-1 Drive output module

To decrease ringing (will increase settling time) after a transient, turn the GAIN pot counterclockwise slightly, then turn the STABILITY pot as required to eliminate oscillation and obtain desired response. Repeat if necessary. 17. Select alternate dynamics and alternate fuel, if applicable. Repeat this step as necessary. This completes the check of units without droop. For units with droop, do the following additional steps. Droop Adjustment (only for units with droop) NOTE The EPG Load Sensor Module cannot be used with the EPG model that has internal droop.

For Isolated Load:

 1. Connect the PT wires to terminals 9 and 10 and the CT wires to terminals 11 and 12. Verify correct polarity (see the wiring diagram). 2. Adjust the RATED SPEED pot for rated speed with no load. 3. Apply 100% rated load or available load. WARNING—OVERSPEED If engine speed increases when load is applied, there is danger of death, personal injury, or damage to equipment. Be prepared to control the engine or turbine manually by forcing the actuator arm toward the minimum-fuel position. If engine speed does increase with load, reverse either the PT or CT input wires.

The generator set is a 60 Hz unit that will be paralleled

 with an infinite bus. If the desired droop is 5% and the generator set can be run at 100% load, the speed at which the generator is run (in step 2) would be 63 Hz.

It is again desired to set the droop of the same generator set to 5%, but this time the generator set cannot be run at 100% load. It has been decided to run the generator set at 50% load, so the speed (in step 2) at which the generator set is run would be 61.5 Hz. In step 7, the DROOP pot is then turned counterclockwise only until the load is 50%.

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