We JQT voltage regulator have large capacity, high efficiency and no wave shape span change, stable voltage regulation, extensive use load, can withstand instantaneous overload, can be longterm continuous operation, the implementation of unattended, hand control, automatic control, mains, voltage control switch at will, with overvoltage, undervoltage, overcurrent, delay, mechanical fault automatic protection device, and the use of convenient installation, reliable operation and other characteristics.