Trimpot Functions; Connection Diagrams; Alternator Connection Without Auxiliary Coil - WEG AVR-A-OPT-06 400Hz Manual De Instalación, Operación Y Mantenimiento

8 TRIMPOT FUNCTIONS

Vad: Voltage adjustments. Turning clockwise increases voltage;
Stb: Stability adjustments. Turning clockwise slows down stability response
U/F: U/F limiter. Turning clockwise increases the U/F range, counterclockwise it diminishes;
NOTE
* A potentiometer for fine adjustments of voltage (5kΩ/3W) can be connected on terminals.
* The U/F and Stb trimpots were preseted and sealed, but if adjustments are required, They can be
performed according to the procedures described in this manual.
* Once the sub-frequency protection is adjusted, when changing the operating frequency, the sub-
frequency protection trimpot must be readjusted.

9 CONNECTION DIAGRAMS

9.1 ALTERNATOR CONNECTION WITHOUT AUXILIARY COIL

Alternator
F-
Voltage Voltage
decreases increases
Frequency Frequency
decreases increases
Figure 8.1: Trimpots function
Exciter
F+
field
E1 E2 3
F+
F-
Faster answer Slower answer
Decrease
reactives
ON/OFF
key ³
E3/4
AVR-A-OPT-06
Alternator Voltage
from 85 to 140 Vca
from 160 to 300 Vca
Automatic Voltage Regulator – AVR-A-OPT-06 400Hz l 17
www.weg.net
Increase
reactives
N
R
S
T
Potentiometer for
external voltage
regulation¹ ²
(5kΩ/3W)