Automatic Isolation Transformer AVR Voltage Regulator for AC Motor Generator Maximum 500V 1. Alternators Essential: Isolation Transformer is essential for alternators using MX321 AVR, provide great working convenience2. Wide Application: The isolation transformer is compatible with AVR MX321 UC22/27 HC4 HC5 PMG3 alternator systems. Technical parameters: maximum input for 500V, output only supports AVR, which is an important replacement part for generator4. Scratch-resistant ABS: Using excellent ABS material, it has impact resistance, scratch resistance, environmentally friendly5. Stable and durable: AVR voltage regulator features stable structure, excellent performance and long service life Specification: Item type: isolation transformer Material: ABS Input: maximum 500V Output: AVR only Isolation transformers are necessary for alternators using MX321 AVR Compatible with AVR MX321 alternator UC22/27 HC4 HC5 PMGL systems Package list :1 x Isolation Transformer