2-10kV Medium Voltage Motor Soft Starter For Water Pump

Medium voltage ac motor soft starter designed with up-to date concept, mainly applicable to the control of and protection for the starting and stopping of squirrel-cage type asynchronous and synchronous motors. The starter is composed of several thyristors in series-parallel, and it can meet different current and voltage requirements.

The medium voltage motor soft starter is widely used in electric industry with rated voltage 3000 to 10000V, building materials chemical industry,metallurgy, steel and paper-making industries etc., and can perform well if used together with various kinds ofelectromechanical devices including water pumps, fans, compressors, crashers, agitators and conveyer belt etc., It is the ideal device for starting and protecting high voltage motors.

Medium voltage motor soft starter is the new type ac motor start device to replace the conventional star-delta starter, self-coupling voltage-drop starter and magnetic control voltage-drop starter. The start current can be lower than about 3 times rated current and could start repeatedly and continuously.

The current transformer detects three-phase current and is used for current limiting and protection. Voltage transformer detects three-phase voltage. It is used for triggered phase detection and voltage protection for overvoltage and undervoltage. The MCU controller controls the thyristor for phase Angle trigger control, simultaneously reduces the voltage on the motor, limits the starting current, and smoothly starts the motor until the motor runs at full speed. After the motor is running at full speed, switch to the bypass contactor. The medium voltage motor soft starter continues to detect the parameters of the motor to protect the motor. The high voltage motor soft starter can reduce the inrush current of the motor and reduce the impact on the power grid and the motor itself. At the same time, it also reduces the mechanical impact on the motor loading device, prolongs the service life of the device and reduces the failure of the motor. The keyboard&display module display all the parameters and status data of the motor soft starter.

1. Free of maintenance: Thyristor is an electric device without contacts. Different from other kinds of products that need frequent maintenance on liquid and parts etc., it turns the mechanical lift into the service life of electronic components, so it needs no maintenance after running for many years.

2. Easy installation and operation: Medium voltage motor soft starter complete system for controlling and protecting the starting of motor. It can put into operation only with the power line and motor line connected. The whole system can be tested electrically under low voltage before operating with high voltage.

3. Backup: The starter comes equipped with a vacuum contactor which can be used to start the motor directly in the inside.If fails, the vacuum contactor can be used to start the motor directly to ensure the continuity of the production.

4. Medium voltage motor soft starter comes equipped with an electromagnetic blocking device for fear of entering the high voltage device in the electrified state.

5. Advanced optical fiber transmission technique realizes the triggering detection of high voltage thyristor and the isolation between LV control loops.

6. DSP microcontroller is used to perform central control which is real-time and high efficient with high reliability and excellent stability.

7. LCD/touch screen display system in both Chinese and English with human-friendly operation interface.

8. RS-485 communication port can be used to communicate with the upper computer or centralized control center.

9. Aging experiments are made on all circuit boards