This manual introduces the use of the EA440 self-excited automatic voltage regulator.
This manual provides operational instructions for the KUTAI EA440 automatic voltage regulator, designed for use with Newage SX440 generators. It details electrical specifications, wiring diagrams, voltage and stability adjustments, droop settings, and field flashing procedures. The document also covers parallel operation with current transformers and troubleshooting common issues like voltage failure or instability. Safety warnings are included regarding improper field flashing and wiring errors. This manual is written in Chinese.
| Input Voltage | 190 – 264 Vac, 1 phase 2 wire |
|---|---|
| Frequency | 50 / 60 Hz, selectable |
| Output Voltage | Max. 90 Vdc @ power input 207 Vac |
| Voltage Regulation | Less than +/- 1% (with 4% engine governing) |
| Operating Temperature | -40 to +70 ˚C |
| Dimensions | 150.0 (L) x 135.0 (W) x 48.0 (H) mm |
| Weight | 418 g +/- 2% |
Adjust the volt VR on the AVR board or use an external 1K ohm trimmer. Turn the trimmer clockwise until the rated voltage is reached.
Check for reversed field polarity or insufficient residual voltage. If polarity is reversed, swap F+ and F-. If residual voltage is below 5 Vac, flash the field for 3 seconds using a 3–5 ohm resistor for full wave or 5–10 ohm for half wave AVR.
Connect a 10VA current transformer (CT) to the generator line not supplying sensing to the regulator. Ensure the CT signal phase relationship is correct with the regulator sensing voltage.