Block Diagram; Trimpots Function; Trimpots Adjustment - WEG GRTA-2D Manual De Instalación, Operación Y Mantenimiento

6 BLOCK DIAGRAM

Reference value
Analog input
±3 or ±5 or ±10 Vdc

7 TRIMPOTS FUNCTION

Vad: Voltage adjustment
StbPI: Stability – Proportional and Integer.
StbD: Stability - Derivative.

8 TRIMPOTS ADJUSTMENT

Vad: Rotating CW, voltage increases.
StbPI: Rotating CW, dynamic response will be slower.
StbD: Rotating CW, dynamic response will be slower.
+ PID
- +
+
U/F
Sensing
DROOP
Figure 6.1: Block diagram
Power stage
Automatic
field flashing
Automatic Voltage Regulator – GRTA-2D l 13
www.weg.net
Excitation field
G