ACU-018 3HNA024871-001 Motor Thermal Relay

ACU-018 3HNA024871-001 Motor Thermal Relay

ACU-018 3HNA024871-001 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 inverter or IF 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. frequency converter and the isolation switch of the main circuit of the 3 pump motors, fu1 is the fuse of the main circuit, and vvvf is the general-purpose frequency converter.

ACU-018 3HNA024871-001 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.

ACU-018 3HNA024871-001 According to the analysis of the control system, this system uses the dvp60es00t2 plc of Zhongda Dentsu to realize the control, with a total of 60 points of inputs and outputs, of which 36 inputs, 24 transistor outputs, AC power supply, its ambient temperature, anti-shock, anti-noise and other performance indicators to meet the requirements, the attached table is the input/output address allocation table of the plc. The attached table is the plc input/output address allocation table.