Variable-frequency water supply control system

The utility model discloses a variable-frequency water supply control system which comprises a PLC, a display circuit, a protecting circuit, a control panel, a relay control circuit and a water pump 1. The variable-frequency water supply control system has the advantages that on the basis of intelligentization, application of PLC variable-frequency speed regulating technology to water supply system electric control is researched, the secondary water supply system PLC and the variable-frequency speed regulating technology used to develop the variable-frequency water supply control system, the variable-frequency water supply control system and a pressure sensor jointly form respective closed-loop control systems, water is supplied to communities constantly all day long according to preset pressure, normal lives of residents are guaranteed, the system is simple in structure and stable in function, precious water and electric resources are saved, cost is lowered, equipment maintenance is reduced, maintenance cost is lowered, and the living quality of the residents is increased.