... voltage regulators Hanging type voltage regulators (TSD type):TSD-3KVA, TSD-4KVA, TSD-5KVA, TSD-6KVA, TSD-7KVA, TSD-8KVA, and TSD-10KVATSD series servo-type AC voltage ... waveform distortion Insulation resistance: ≥2MΩ AC Voltage Regulator(AVR,STABILIZER) TSD-3KVA