Avr Settings - Leroy-Somer Nidec R180 Installation And Maintenance Manual

Electric Power Generation

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
EXPERIENCE FLUCTUATIONS.
- VOLT : Full CCW
- STAB : Centre of travel
- UFRO : Select 50Hz or 60Hz 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.
10
Installation and maintenance
R180
AVR
SYSTEM MAY
- 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 47.5Hz for 50Hz
or 57Hz for 60Hz.
- 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.
5599 en - 2020.07 / f