... *20001050*750*2000EfficiencyAC-AC>95%AcousticNoise level≤50dBEnvironmentTemperature-5°C to 45°CHumidity20% to 90%automatic voltage regulator Production flow diagramyiyuan Electric ... . Our main products are voltage stabilizers, voltage regulators, inverters, voltage regulator ,silicon rectifying chargers, low voltage apparatus, reactors, current transformers, voltage transformers and circuit breakers ...