Foreword: High-voltage soft starter, also known as medium and high-voltage solid-state soft starter (Medium, High-voltage solid-state soft starter), is a new type of intelligent motor starter, which consists of isolating switch, fuse, control transformer, control module, thyristor Module, high-voltage vacuum bypass contactor, control module, thyristor module, high-voltage vacuum bypass contactor, thyristor protection component, optical fiber trigger component, signal acquisition and protection component, system control and display component. The high-voltage soft starter is a motor terminal control device that integrates starting, display, protection, and data acquisition, and can realize more complex control functions.
The high-voltage soft starter controls the input voltage by controlling the conduction angle of the thyristor to change the voltage value of the stator terminal of the motor, that is, it can control the starting torque and starting current of the motor, so that the soft start of the motor can be realized Take control. At the same time, it can accelerate smoothly according to the set starting parameters, thereby reducing the electrical impact on the grid, motor and equipment. When the motor reaches the rated speed, the bypass contactor is automatically connected. The motor can be monitored after starting, and various fault protections are provided.
The high-voltage soft start device can start the machine locally, or use an external dry contact for remote start. At the same time, PLC and communication (485 interface, Modbus) can also be used for start-stop control. When starting the high-voltage soft-start device, you can choose two different modes of soft start (standard soft start, soft start with kick function, constant current soft start, dual voltage ramp start, etc.) or direct start to meet the different needs of the application site.
The intelligent control method of the high-voltage soft starter can accurately set parameters such as starting torque, starting current, starting time, and shutdown time, and can also be controlled by networking with microcomputers and PLCs. Compared with the traditional starter (liquid high-voltage soft starter), it has the advantages of small size, high sensitivity, no contact, low power consumption, high reliability, and maintenance-free (the thyristor is a non-contact electronic device) Continuous operation for several years without downtime for maintenance), easy installation (it can be put into operation after connecting the power line and motor line), light weight, comprehensive functions, stable performance, intuitive operation, etc.
The high-voltage soft-starter can smoothly increase the output voltage, avoid impact starting, provide protection for power supply systems and motors and other components, and prolong the service life of electrical equipment and circuits.
Post time: Apr-13-2023