Constant frequency of water supply equipment machine adopts imported frequency converter itself has an undervoltage, overvoltage, phase, overcurrent, overload, short circuit, overheating, stall prevention, protection, trouble-free use of up to 100,000 hours. Equipment distribution control section, the use of intelligent control principle, convenient and practical operation, the device status at a glance, easy to fly professionals quickly master. Production equipment is a constant frequency of water supply protection function, safe and reliable, easy to operate system ideal water supply equipment.