Pump accessory products ---- Control cabinet

1, the concept of control cabinet is through the console button switch, the pump equipment, to achieve short-range or remote control, mainly to control the motor mechanical movement. 2, with the benefits of control cabinet Control cabinet will play a protective role of the pump, but also on-site staff play a protective role, to prevent staff accidentally touch live parts, electric shock occurred 3, the control cabinet has five start-up mode 1) Power frequency start frequency definition of one of the important indicators of electrical quality. Refers to the commercial use of AC frequency. Power frequency generally refers to the frequency of mains, in our country is 50Hz, other countries also have 60Hz control cabinet 2) Star delta start star delta start by changing the motor three-phase winding connection buck start 3) autoclave start from Coupling transformer step-down start through the transformer to reduce the voltage of the motor power input step-down start. And when the motor rated power is relatively large and the motor is connected to the star when the stepping down can not be used star delta, autotransformer Of the voltage ratio can be changed so that you can set the start of the required torque ratio, this step-down start than the star triggers big investment. 4) The soft start adopts high-power IGBT power components, itself with various motor protection functions: such as: undervoltage, phase loss, phase sequence, overload, etc. 5) Inverter start inverter is the application of frequency conversion technology and microelectronic technology, By changing the working frequency of the motor to control the AC motor power control settings, according to the actual needs of the motor to provide the required power supply voltage, and thus achieve the purpose of energy saving, speed control, in addition to changing the frequency of the AC power supply , Can also be used to change the AC motor speed and torque. There are a variety of motor protection features: such as: undervoltage, phase loss, phase sequence, overload, etc. 4, the control cabinet has four control methods 1) level control 2) pressure control 3) time control 4) temperature control 5, the control cabinet to understand from four aspects 1) start mode 2) mode of operation 3) control mode 4) protection 6, all kinds of control cabinet inverter is best to use, the direct frequency cheapest. 7, Ordinary frequency counter / frequency counter and pump selection features: 1) pipe pump / centrifugal pump selection control cabinet when the same power with the pump. 2) submersible pump / well pump selection control cabinet, according to the current ratio 3) The current of the pump is larger than three phases, when the current is large, it is selected according to the current, and when the power is large, it is selected according to the power. 4) When the control cabinet is more than 80m, the pump has a large power. 8, the main control cabinet, backup pump operation There are three kinds of 1) normal type switch: is the manual selection of the main pump, the pump from the main pump operation, the main pump problems, the backup pump and then run. 2) Timing automatic switching: It is to make the main pump and backup pump free to set the working time, the two pumps in accordance with the set time to convert their own operation. 3) Alternate switch: is to start once each time, the main pump and backup pump will be switched on and off once, so that the main pump and the backup pump will wear evenly. 9,220V pump with a capacitor can not be equipped with variable frequency control cabinet, no capacitance can be.

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