This document provides detailed specifications and instructions for the EA448 generator automatic voltage regulator from Kutai. This product is suitable for auxiliary winding or permanent magnet brushless generators and is compatible with Leroy Somer's R448, R449, R438 and other AVR models. The features of the product include a voltage adjustment rate of less than ±0.5%, LAM function to increase stability during load moments, frequency selection of 50/60 Hz, low frequency protection and overexcitation current limitation functions, optional single-phase or three-phase voltage detection, slow start function to stabilize initial voltage, and two-stage response time for stable adjustment.
The EA448 is a generator automatic voltage regulator (AVR) designed for 160 VDC output at up to 10 A. It offers fine voltage adjustment (< +0.5 %), low‑frequency protection, over‑current limiting, and selectable 50/60 Hz operation. The unit is compatible with Leroy Somer AVR models R448, R449 and R438.
The regulator accepts a wide range of input voltages (0‑110 V, 0‑220 V, 0‑380 V) and operates in temperatures from –40 °C to 60 °C. Physical dimensions are 203 mm × 153 mm × 60.5 mm, and it meets vibration standards up to 50 G. Contact information for KUTAI Electronics is provided for further technical support. This manual is written in Chinese.
| Input voltage (0‑110 V) | 95 ~ 140 V |
|---|---|
| Input voltage (0‑220 V) | 170 ~ 260 V |
| Input voltage (0‑380 V) | 340 ~ 520 V |
| Frequency | 50/60 Hz |
| Maximum output voltage | 160 VDC |
| Maximum output current | 10 A |
| Voltage adjustment rate | < +0.5 % |
| Operating temperature | -40 °C ~ 60 °C |
| Storage temperature | -40 °C ~ 85 °C |
| Dimensions (D × W × H) | 203 mm × 153 mm × 60.5 mm |
The regulator can deliver up to 10 A of output current.
The device operates from –40 °C to 60 °C.
Yes, it is compatible with Leroy Somer R448, R449 and R438 models.