Working principle of 10 kv high-voltage solid state soft start cabinet

Hubei E-Motor EGRQ series high voltage solid state soft start is a new type of soft start device for medium and high voltage motors. High voltage solid state soft start is mainly applicable to 3KV-6KV-10KV medium and high voltage alternating current motors. High voltage solid state soft start uses advanced DSP control technology Power electronics and other components are mainly composed of three-phase reverse parallel thyristors connected in series between the power supply and the controlled motor and their electronic control circuits. By using different methods to control the conduction angle of the three-phase anti parallel thyristor, the input voltage of the controlled motor can be changed according to different requirements, so that different demand functions can be achieved.

　 　 　 EGR Q high pressure solid state soft start device The combination of thyristor and professional insulation materials with power electronic control technology is adopted. High voltage solid state soft starter suitable for the characteristics and characteristics of large and medium-sized motors. have A variety of perfect protection functions: short circuit, overcurrent, current limiting, overvoltage, undervoltage, overload, phase loss, three-phase current imbalance, overheating, communication failure and other fault status display, and timely handle and protect the soft starter and motor. The control core of the high-voltage solid state soft start device is mainly the microprocessor CPU. The CPU microprocessor control system can start and protect the motor. The CPU triggers the SCR to reduce the voltage applied to the motor, and then slowly and smoothly increases the motor torque by controlling the voltage and current applied to the motor until the motor accelerates to full speed. High voltage solid state starting mode can reduce the impact current when the motor starts, and reduce the impact on the power grid and the motor itself when starting. CPU When the stop signal is sent, a gradually decreasing voltage is applied to the motor at the same time to make the motor stop smoothly. This is different from the electric brake. In fact, the soft stop will increase the stop time of the motor. This function is applicable to pump shutdown control to reduce water hammer phenomenon and damage and impact on mechanical structure. High pressure solid state soft start device is mainly used in such loads as bow thrusters, compressors, elevators, centrifugal pumps, conveyor belts, elevators, etc. The starting can be selected according to the rated power of the motor. The starting voltage of the motor is adjusted to 40% - 50%;

　 　 　　 Heavy load starting: for example, the starting of centrifuges, crushers, mixers, grinders, mixers, etc. can be selected according to 120% of their rated power. The starting voltage of the motor is adjusted to 50% - 60%. The maintenance free thyristor is a non-contact electronic device. Unlike other types of products, the high-voltage solid state soft start device requires frequent maintenance of conductive liquid and components, which changes the mechanical life into the service life of electronic components. It can operate for several years without shutdown maintenance.