Trimpots Adjustement; Led Indication; Operation; Voltage Regulator - WEG WRGA-02 Manual De Instalación, Operación Y Mantenimiento

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10.

TRIMPOTS ADJUSTEMENT

Vad: Rotating it clockwise, the voltage increases;
Stb: Rotating it clockwise, the response slows down;
U/F: Rotating it clockwise, increases the frequency for U/F actuation;
Drp: Rotating it clockwise, increases the reactive compensation range.
Note: A potentiometer (5KW/3W) can be connected to the terminals of the external potentiometer to perform fine voltage
adjustment.
NOTES
1. A potentiometer (5KW/3W) can be connected to the terminals of the external potentiometer to
perform fine voltage adjustment.
Voltage reduces | Voltage increases
11.

LED INDICATION

OK: Regulator with operation OK.
Hz: Low speed – Under frequency protection actuating.
12.

OPERATION

12.1 VOLTAGE REGULATOR

It compares the real voltage value coming from the generator output with the theoretical value adjusted through the voltage
adjustment trimpot, plus the external voltage adjustment (if available). The error is processed by the sensing grid, which value
determinate the excitation voltage, controlling this way the generator voltage output.

12.2 POWER CIRCUIT CONNECTION

WRGA02 - The voltage originated from the generator auxiliary coil, is connected to 3 and E3/4/N terminals.
WRGA02/D - The voltage originated from the PMG, is connected to Ax1, Ax2 and Ax3 terminals. This voltage passes by the
controlled rectifier and is applied to the generator field.
16 l Automatic Voltage Regulator – GRT7-TH4-R2
Fast answer | Slow answer
Figure 10.1 - Trimpots adjustment.
Frequency | Frequency
Reduces Increases
Reactive | Reactive
Reduces Increases