... 5 relays. 2,Accuracy of voltage stabilization: 220±8% 3,Frequency: 50/60Hz4,Low-voltage protection: 188V±4V, after low-voltage protection, the output will ... . 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. We have passed ...