1、Powerful Performance: Our voltage regulator has three phase voltage sensing, excitation system and phase to phase voltage sensing for powerful performance. 2、Rapid Response: Our voltage regulator can achieve rapid response and is an automatic voltage regulator with transistors. 3、Robust and Durable: Our voltage regulators are robust and easy to install, just follow a simple process and you'll be set up successfully. 4、Environmentally Suitable: This voltage regulator is suitable for high levels of vibration and harsh environments, so if you happen to have a related need, then this is the right one. 5、Applicable Models: The voltage regulator is suitable for LSA 46.2, for 47.2, for 49.1 and for 50.2 alternators. Suitable for SHUNT, for AREP or for PMG excitation systems alternators. Item Type: Automatic Voltage Regulator Material: ABS Model: R450 Detection Input: Voltage 0-110V terminals, AC95-140V Voltage 0-220V terminals, AC170-260V Voltage 0-380V terminals, AC340-528V Power Input: Three phase Voltage AC40-150V Magnetic Output: Voltage 120VAC input, maximum DC160 V, power maximum 10A Voltage Regulation Accuracy: ±0.5% RMS (within 4% of engine speed variation) When Short Circuit Occurs: Excitation current is regrettably reduced to less than 1A in 10 seconds F1 connected on X1, F2 connected on Z2 10A, slow speed 250V F0-110V terminal, 95-140V 0-220V terminal, 170-260V 0-380V terminal, 340-528V 1 x Generator Voltage Regulator Panel 1 x Instruction Manual