WEG GRT7-TH4E, Installation, Operation And Maintenance Manual

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Automatic Voltage Regulator
–
GRT7-TH4E / GRT7-TH4PE l 13
6 BLOCK DIAGRAM
Figure 6.1: Block diagram
7 TRIMPOTS FUNCTION
P1 : Voltage adjustment
P2 : Droop adjustment
P3 : Stability 2 adjustment
P4 : Stability 1 adjustment
P5 : Under frequency adjustment
8 TRIMPOTS ADJUSTMENT
P1 : Rotating CW, voltage increases.
P2 : Rotating CW, reactive compensation range increases.
P3 : Rotating CW, dynamic response will be slower.
P4 : Rotating CW, dynamic response will be slower.
P5 : Rotating CW, U/F range increases and rotating CCW, it decreases.
NOTE
* A
potentiometer may be connected for fine voltage adjustment (5kΩ/3W) at terminals 6 and 7.
* The P3, P4 and P5 trimpots were set as default and sealed, but if adjustments are required, they can be
performed according to the procedures described in this manual.
Power stage
G
U/F
DROOP
+
+
- +
Analog input
± 9 Vdc
Reference value
Excitation field
Automatic
field flashing
PID
Sensing