3BHE020356R0101 GFD212A Motor Thermal Relay

3BHE020356R0101 GFD212A Motor Thermal Relay

3BHE020356R0101 GFD212A The main circuit of the electronic control system consists of 3 motors m1, m2 and m3 respectively. contactors km1, km2 and km3 control the motors m1, m2 and m3 respectively for frequency conversion or frequency operation, fr1, fr2 and fr3 are the thermal relays for overload protection of the 3 pump motors, qs1, qs2, qs3 and qs4 are the isolation switches for the inverter and the main circuit of the 3 pump motors, fu1 is the fuse for the main circuit, vvvf is the universal inverter. qs1, qs2, qs3, qs4 are the isolation switches of the inverter and the main circuit of the 3 pump motors, fu1 is the fuse of the main circuit, and vvvf is the general-purpose inverter.

3BHE020356R0101 GFD212A frequency converter selected Sanken Lida Electric Co., Ltd. shf series, the power of 7.5kw, 1.5kw and 15kw, respectively, the frequency converter adopts analog control mode. Through the inverter on the motor pump to achieve soft start function. Figure 2 shows the wiring diagram of pid regulator and inverter. Inverter according to pid regulator output signal, timely adjustment of the output frequency, change the motor and pump speed, adjust the system water supply, so that the pressure in the water supply pipeline network stabilized at the set pressure value.

3BHE020356R0101 GFD212A According to the analysis of the control system, this system selects the dvp60es00t2 plc of Zhongda Dentsu Company to realize the control, with a total of 60 points of inputs and outputs, of which 36 inputs, 24 transistor outputs, AC power supply, and its ambient temperature, impact resistance, anti-noise and other performance indicators to meet the requirements, the attached table for the plc The attached table is the plc input/output address assignment table.