10
Electric Power Generation
2019.10 / e
Installation and maintenance
R180
AVR
5599 en -
5 - AVR SETTINGS
WARNING! TO PREVENT ELECTRIC
SHOCK AND PERSONAL INJURY, CARE
MUST BE TAKEN NOT TO TOUCH LIVE
PARTS.
CAUTION! ADJUSTMENTS MUST BE
DONE CAREFULLY AND GRADUALLY
WHILE THE ALTERNATOR IS RUNNING
OTHERWISE THE SYSTEM MAY
EXPERIENCE FLUCTUATIONS.
- VOLT : Full CCW
- STAB : Centre of travel
- UFRO : Select 50 Hz or 60 Hz mode
Start-up
- Check all settings are as per the paragraph
“Initial Settings”.
- Start the prime mover and bring the
alternator up to rated speed (rpm).
- The voltage at the terminals will show
voltage build-up.
- Adjust the voltage at the terminals using
the voltage adjustment potentiometer.
- If oscillations are seen on the voltmeter
(A.C.) indicating the alternator terminal
voltage, gradually turn the “STABILITY”
trimmer on the R180 clockwise and stop
turning it at the position where the
oscillations disappear.
- If oscillations are not seen on voltage
build-up, turn the “STABILITY” trimmer
anticlockwise till oscillations appear and
then slightly turn it clockwise to remove
any oscillation. This will help tune the
controller and alternator time constants.
- Set the Ufro knee point at 47.5 Hz for 50 Hz
or 57 Hz for 60 Hz.
- If an external voltage adjustment
potentiometer is required, stop the alternator
and connect a 1 kOhm potentiometer in
place of the link at terminals A1 and A2.
- If droop is required, connect the droop
current transformer at terminals Q1 and Q2.
