1. APPLICABLE GENERATOR: AVR automatic generator regulator board, suitable for STC 3-phase 220/380/400VAC voltage generators, with good compatibility. 2. EXCELLENT COMPONENTS: The voltage regulator is made of high-quality electronic components to ensure stable performance and extended service life. 3. PROTECTION FEATURES: The automatic voltage regulator includes low-frequency protection, which activates a protection circuit when generator speed decreases. 4. EASY CONNECTION: The generator voltage regulator features standard wiring for convenient installation and broad application compatibility. 5. GENERATOR PART: The automatic voltage regulator can directly replace old or damaged generator components, offering a practical and reliable solution.