Block Diagram; Trimpots Function; Trimpots Adjustment - WEG GRT7-TH4E Manual De Instalación, Operación Y Mantenimiento

6 BLOCK DIAGRAM

Reference value
Analog input
± 9 Vdc

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.
+
PID
- +
+
U/F
Sensing
DROOP
Figure 6.1: Block diagram
Automatic Voltage Regulator – GRT7-TH4E / GRT7-TH4PE l 13
Power stage
Automatic
field flashing
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Excitation field
G