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●Product Introduction
The series of high-voltage thermal resistance starting control devices are suitable for large and medium-sized high-voltage squirrel cage AC asynchronous motors or asynchronously started high-voltage synchronous motors for reduced voltage starting. The motor started using this device has soft starting characteristics of small and constant starting current and gradually increasing torque. There is no current impact and mechanical impact during the starting process. It has little impact on the power grid when starting. There is no electromagnetic interference. It is a starting reactor and an auto-coupling step-down starter. Compared with high-voltage variable frequency soft starters, it is an ideal substitute product and has obvious advantages such as simple operation, maintenance-free, and no harmonic pollution. High-voltage thermal resistance starting control device is widely used in step-down soft starting of motors with voltage levels, , power ranges ~ to larger capacities.
●Basic Principle
The high-voltage thermal resistance starting control device consists of a three-phase balanced resistor with negative temperature characteristics. When current is passed through the resistor, the temperature of the resistor body gradually increases and the resistance value gradually decreases, so that the motor terminal voltage gradually increases and the starting torque gradually increases to achieve the purpose of smooth starting of the motor and reducing the starting current. The device is composed of a thermal resistor and a high-voltage soft-start control cabinet, isolation cabinet, switching cabinet, and star point control cabinet. It is supplied in a complete set and is connected to the motor starting circuit to start the motor and complete the protection function during the motor starting process.
●Standard Specifications
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