Feature: 1. An electronic device that allows the alternator to produce a fixed output voltage 2. Has an open chassis, resin molded design, and is designed to be installed in the junction box of an alternator 3. The device measures the voltage between one of the phases of the alternator and the neutral point, and adjusts the DC voltage applied to the field winding until it reaches the required alternator voltage 4. Output stage of the device is a half-wave thyristor output related to the freewheeling diode 5. Basically, the device is compatible with all brushless alternators, and for this purpose a stability adjustment potentiometer is also provided 6. AVR includes a low frequency protection circuit. This function can reduce the output voltage during overload or engine stop Specification: Item Type: Voltage Regulator Generator Number of Phases: Single Phase Voltage Adjustment Range: 210-250V Minimum Frequency: 50/60Hz Frequency Protection Adjustment Range: 40-50Hz Output Voltage: 0-115VDC (230V) Output Current: 10A Continuous, 20A (Forced for 5 Seconds) Supply Voltage for Construction: 5 Volts Minimum Adjustment: Typically ±2% Power Output Stage: Half-Wave Thyristor Operating Temperature: -10℃ (14℉) to 60℃ (140℉) Storage Temperature: -20℃ (-4℉) to 80℃ (176℉) Maximum Humidity: 95% Non-Condensing Length: Approx. 125mm / 4.9in Width: Approx. 68mm / 2.6in Height: Approx. 35mm / 1.3in Fixed Center: Approx. 115mm / 4.5in, 2xM6. Package List: 1 x Voltage Regulator4 x Wire1 x User Manual Note: Installation, connection, and inspection must be carried out by personnel with professional knowledge. Please do not touch the controller during operation to avoid dangerous accidents.