Product Overview

The HJMV series high-voltage solid-state soft starter is a perfectly reliable and easy-to-maintain product, mainly suitable for control and protection of the start and stop of squirrel-cage asynchronous and synchronous starters. It provides a current-limiting torque reduction starting method for motors. This device uses multiple thyristors connected in series and parallel to meet different current and voltage requirements. The product is widely used in power, building materials, chemical, metallurgy, steel, papermaking, and other industries with rated voltages of 3000-10000V. It is well suited for various electromechanical equipment such as mercury water, fans, compressors, crushers, mixers, belt conveyors, and more, making it an ideal device for starting and protecting high-voltage motors.

Product installation introduction

The high-voltage soft starter device is an intelligent motor starting device suitable for squirrel-cage asynchronous and synchronous motors. It is a motor terminal control device that integrates starting, display, protection, and data acquisition. Users can achieve complex control functions with fewer components. The high-voltage soft starter controls the input voltage by adjusting the thyristor's conduction angle, enabling changes in the voltage value at the stator terminal, i.e., controlling the motor's starting torque and current, thereby achieving soft start control. High-voltage soft starting can smoothly accelerate according to set starting parameters, thereby reducing electrical and mechanical shocks to the power grid, motor, and equipment. When the motor reaches its rated speed, the bypass contactor automatically turns on. After the high-voltage soft starter device is started, it continues to monitor the motor and provides various fault protections.

Technical features

● Component composition: high-voltage thyristor module, thyristor protection component, fiber optic trigger component, vacuum switch component, signal acquisition and protection component, system control and display component.

● Triover modules: thyristors with identical parameters are installed in series and parallel within each phase.

● SCR protection components: mainly include an overvoltage absorption network composed of RC networks and voltage equalizing protection networks composed of equalizing units.

● Fiber optic trigger components: Uses strong trigger pulse circuits to ensure consistent and reliable triggering; Reliable high and low voltage isolation is achieved through fiber optic triggering.

● Vacuum switch components: After starting, the three-phase vacuum bypass contactor automatically engages, and the motor is put into grid operation.

● Signal acquisition and protection components: Voltage transformers, current transformers, and lightning arresters collect voltage and current signals from the main circuit, with the main CPU controlling and providing corresponding protection.

● System control and display components: 32-bit ARM core microcontroller execution center control, LCD/touchscreen display, capable of showing three-phase voltage, current, fault information, operating status, etc.

● The cabinet structure uses KYN28 high-voltage switchgear cabinet body, with the main structure using a 2mm thick composite folding process of aluminum-zinc steel plate. The cabinet doors use a 2mm thick cold-rolled steel composite folding process, and the doors use electrostatic powder coating technology, featuring impact resistance, corrosion resistance, and an attractive appearance. Protection rating is IP40.

Functional features

● Multiple starting methods;

● Starting control: The whole machine is equipped with local, remote (external dry contact), PLC, and communication (485 interface, Modbus) start-stop control functions;

● Soft start/direct start with conversion function;

● Thyristor protection: resistor-capacitor absorption dynamic and static voltage balancing technology ensures reliable and safe operation of power devices connected in series under high voltage;

● Strong anti-interference capability;

● Modular design;

● Communication interface: RS-485 communication interface, built-in standard MODBUS protocol for easy configuration and connection;

● Analog signal output: 4-20mA signal;

● Equipped with 15 fault memories;

● Comprehensive start-stop functions;

● High reliability; High safety; Strong practicality.