High voltage soft starter is a new intelligent motor starter, it is suitable for squirrel-cage asynchronous and synchronous motors. It is an Integrated motor terminal control equipment for starter, display, Protection, and data collection. Users can achieve more complex control functions by using fewer components. The high-voltage soft starter controls the input voltage through the conduction Angle between the control items in order to change the voltage value at the starter end of a motor, that is, control the starting torque and starting current of the motor to realize the motor soft start control. High-voltage soft starters can accelerate smoothly according to the set starting parameters, thus reducing the electrical and mechanical impact on the power grid, motor, and equipment. When the motor reaches the rated speed, the bypass contactor is switched on automatically. The high-voltage soft starter continues to monitor the motor after starting and provides various fault protection.
Component composition： High voltage SCR module, SCR protection component, optical fiber trigger component, vacuum switch component, signal acquisition and protection component, system control, and a display component.
SCR module: SCR modules with the same parameters in each phase are installed in series and parallel.
SCRprotection components: mainly including RC network composed of overvoltage absorption network, composed by the voltage sharing unit of voltage sharing protection network. Fiber trigger components: Use a strong trigger pulse circuit, to ensure trigger consistency and reliability, using fiber optic trigger to Realize high and low voltage isolation.
Vacuum switch component: after starting, the three-phase vacuum bypass contactor automatically pulls in . the motor is working into power grid operation. Signal acquisition & protection components: the voltage transformer, current transformer, and lightning arrester collect main circuit voltage, current signal acquisition, the main CPU control and make corresponding protection.
System control and display components:32-bit ARM core microcontroller execution center control. LCD/touchscreen display can display three-phase voltage, Current, information, running status, etc. The cabinet structure adopts KYN28 high voltage switch cabinet body, the main structure adopts a 2mm aluminum-zinc steel plate compound folding process, the cabinet door adopts 2mm cold rolled steel plate compound folding process, the cabinet door adopts an electrostatic spraying process, with the characteristics of im act resistance corrosion resistance and beautiful a clearance. The protection level is IP40.
A variety of starting ways;
Starting control: the machine is equipped with local, remote (external dry contact), PLC. Communication (485 interface. Modbus) signalling control function.
Soft start/direct start with conversion function;
Thyristor protection: resistance and capacitance absorption dynamic and static voltage sharing technology, to ensure the reliable and safe operation of power devices in series under high voltage
Communication interface: RS-485 communication interface, embedded standard MODBUS protocol, convenient configuration connection
Analog signal output: 4-20mA signal
Memory of 15 failures
Advanced and perfect start and stop function
High reliability, High security, Practical.