AVR R438 – Automatic Voltage Regulator
The R438 is a reliable and efficient Automatic Voltage Regulator (AVR) designed for brushless alternators. It ensures precise voltage regulation, stable performance under varying load conditions, and excellent protection for generator systems. With a compact, fully encapsulated design and advanced solid-state technology, the R438 offers long-lasting durability and consistent performance in both industrial and commercial power applications.

Key Specifications:

• Voltage Sensing: 190–520V AC (three phase)

• Frequency Range: 15–100 Hz

• Excitation Voltage: Max 110V DC @ 4A continuous (7A for 10s)

• Regulation Accuracy: ±1.0%

• Operating Temperature: –40°C to +70°C

• Build Type: Fully encapsulated, resistant to vibration, dust, and moisture