19
OPM-155/A
AVR WIRING
MX341 Automatic Voltage Regulator
Under normal conditions only two adjustments are made to
the voltage regulator.
VOLTS
To adjust generator output voltage.
Clockwise to increase voltage.
STABILITY
To prevent voltage hunting.
Clockwise to increase the
dampening effect.
STANDARD CONNECTIONS
(Top Row, Right to Left)
1 -2 Are linked together.
2 - Lead #9 from AC terminal block.*
3 - Lead #8 from AC terminal block.*
X - F1 from generator exciter
XX - F2 from generator exciter
P4, P3, P2 all come from the PMG
* voltage between these to leads must be between 190 &
264.
(Center tapped on 480 Volt)
23
5040-00
60708-166
VOLTAGE REGULATOR WIRING
K1 K2 P2 P3
P4 XX X 3
2 2 1
A1
A2
S1
S2
1
2
3
4
5
6
7
8
C B A
3 2 1
MX341
Trim
Droop
Volts
Stability
Selection
UFRO
Frequency
Selection
Indicator
LED
Stability
K1-K2
Power isolation link
(normally fitted)
REFER
DIP
EXC.
TRIP
> 550kW
< 90kW
90-550kW
4P60H
z
4P50H
z
No link 6P50Hz
6P60H
z
Sensing
links
standard
positions
Under normal conditions only two adjustments
are made to the voltage regulator.
VOLTS - To adjust generator output voltage.
Clockwise to increase voltage.
STABILITY - To prevent voltage hunting.
Clockwise to increase the
dampaning effect.
STANDARD CONNECTIONS
(Top Row, Right to Left)
1 -2 Are linked together.
2 - Lead #9 from AC terminal block.*
3 - Lead #8 from AC terminal block.*
X - F1 from generator excitor
XX - F2 from generator excitor
P4, P3, P2 all come from the PMG
* voltage between these to leads
must be between 190 & 264.
(Center tapped on 480 Volt)
SX460 Automatic Voltage Regulator
The following is a list of connections on the AVR. These
have been factory set and other that volt adjustment should
never have to be changed.
1. Generator AC sensing connection (6, 7, 8)
Field voltage DC (F1 & F2)
2. Voltage Adjustment
3. External voltage adjustment rheostat
No external rheostat link 1 & 2
With external rheostat, 1 & 2 unlinked
Connect external rheostat leads to 1 & 2.
4. AVR input selection.
High Voltage 208/240/277 no link between 3 & 4
Low voltage 120 volt link 3 & 4.
5. Under Frequency Roll Off adjustment
6. Under Frequency Roll Off indication LED
7. Frequency selection:
50 Hz operation Link C to 50
60 Hz operation Link C to 60
8. Stability control
MX341 Automatic Voltage Regulator
