Basler Electric AVC63-12 - Manual (Page 8)

Publication
9337200991
Revision
J
Instructions
Date
01/15
Page
8 of 10
Factory Calibration (FAC CAL)
Caution
The FAC CAL control is intended for use during factory calibration only. The
following procedure can be used if the factory calibration has been disturbed.
1. With the regulator operating on a generator, adjust the FAC CAL control fully counterclockwise and the
external voltage adjust control fully clockwise.
2. Adjust the FAC CAL control clockwise until the generator voltage reaches the desired maximum voltage
setting. The regulator is calibrated and the FAC CAL control can be sealed.
Parallel Droop Compensation
Variable parallel droop compensation levels can be obtained by adjusting the DRP control. Clockwise rotation
increases the amount of droop for a given condition.
Line Drop Compensation
When the sensing input CT connections are reversed to provide line drop compensation, the droop adjustment
becomes the line drop compensation adjustment.
STARTUP
Startup and troubleshooting procedures for the AVC63-12 and AVC125-10 are listed in the following procedure.
Symptoms of startup problems stemming from improper regulator adjustments and certain generator system
problems that resemble faulty regulation are listed with possible solutions. Simplifying the system by eliminating
components, such as remote adjustment potentiometers and other nonessential items, can be helpful in the
troubleshooting process. Adjustments, options, and an operational test are included in the paragraphs following
the procedure.
1. Ensure that the regulator has been installed in accordance with the Installation and Connections paragraphs
before proceeding with system startup.
2. Start the prime mover and bring it up to rated speed.
If the voltage does not build up:
a. Flash the field.
b. Remove power for one minute to reset the overexcitation circuit.
3. Slowly adjust the VOLT potentiometer or external, voltage adjust rheostat until the voltage reaches nominal.
If the voltage will not build up to rated:
Check the generator output for a shorted or excessive load.
4. Apply and remove the generator load to check stability.
If the generator response is too slow or is hunting (oscillating):
a. Check the generator output for a shorted or excessive load. Adjust the STB potentiometer with no load
applied.
b. Check stability of the governor.
5. Check regulation under normal operating conditions.
If the regulation is poor:
a. Check that the prime mover is up to rated speed.
b. Check that the voltmeter is connected at the same point as the regulator sensing.
c. Use an average-sensing voltmeter (not an rms-sensing voltmeter).
6. Reduce the generator frequency. The generator output should decrease from this point.
If the generator output voltage does not decrease at the desired frequency:
a. Check that all wiring is in accordance with the connection diagrams provided in this instruction sheet.
b. Adjust the UF KNEE control.