DATAKOM AVR-20 Voltage Regulator is an electronic device which lets the alternator to produce fixed output voltage. It has open chassis, resin molded design and is intended to be mounted in the alternator’s terminal box. The output stage of the device is a Half Wave tyhristor output associated with a free wheeling diode. Basically the unit is compatible with all brushless type alternators. The AVR-20 has a special relay-less electronic circuit design. The unit does not include moving parts; therefore it is able to operate in highly vibrating environments. The AVR-20 includes a low frequency protection circuit. This feature reduces the output voltage during overload or engine stop. Therefore the diesel engine is protected from excessive torque generated by high startup currents of large electrical equipments. Similarly, the diesel engine may be stopped under load without damage. The easy connection scheme of the device allows fast and easy replacement. The device can be connected as phase-to-phase instead of default phase-to-neutral to be used in 120/208 VAC 60Hz alternators. FEATURES: Half-Wave tyhristor output, 0-20 amps. output current, 0-115 volts output voltage, Relay-less circuit design, Low frequency protection, Built in voltage adjustment, Stability adjustment, Remote voltage adjustment feature, Easy connection scheme, Compatible with various types of alternators. TECHNICAL SPECIFICATIONS: Phases: single phase. Voltage Adjustment Range: 195-265 Volts min Frequency: 50/60Hz. Frequency Protection Adj. Range: 40-50Hz Output Voltage: 0-115 volts-DC at 230volts Output Current: 20A continuous, Residual Voltage For Build Up: 5 volts minimum Regulation: +/- 2% typical. Power Output Stage: Half Wave tyhristor. Internal Fusing: 10A (fast acting fuse) Operating temp.: -10?C (14?F) to 60 ?C (140?F). Storage temp.: -20?C (-4?F) to 80 ?C (176?F). Maximum humidity: 95% non-condensing. Dimensions: 125x68x35mm (L x W x H) Fixing centers: 115mm, 2xM6 Weight: 280grams. WE DO NOT SHIP THIS PRODUCT TO USA AND CANADA