75kW - 10000kW soft starter liquid resistance soft starter for slip ring motor

75kW - 10000kW soft starter liquid resistance soft starter for slip ring motor

Products Description

    Soft starting device is the high voltage ac motor starting equipment, its main composition is connected into the power between
the charged with motor and three instead of parallel thyristor components and electronic control unit. WSTRHV series high voltage
solid-state soft starting device is composed of multiple thyristor series parallel, by controlling the thyristor trigger Angle to control
the size of the output voltage, can satisfy the motor starting process in different voltage and current requirements. In the process
of motor starting, WSTRHV series high voltage solid soft starting device according to the preset curve starting, increase the voltage
of the motor, the motor smooth acceleration, so as to reduce motor starting on the grid, and connected equipment electrical and
mechanical shock. When the motor starts up to normal speed, the bypass vacuum contactor or circuit breaker is connected, and
the motor starts to finish. During the operation of the motor, the soft starting device continues to monitor the motor, measuring
the electric current, voltage and all kinds of fault protection in real time.

Performance indicators

Working principle

When the soft start device detects the external start command, after the microprocessor detects the synchronization signal, the main circuit thyristor
phase angle trigger control, and gradually increase the motor side of the current and voltage, so smooth start the motor. In this process, the RC RC
absorber absorbs the peak voltage at the time of thyristor reverse turn-off; the voltage-controlled thyristor voltage ensures that each thyristor voltage
in the series circuit is equal. Fiber triggering ensures electrical isolation between the controller and the high voltage thyristor, while ensuring that the
trigger signal is not subject to electromagnetic interference.

Functioning

1. Protection function

  6) Underload protection: During operation of the motor, underload or loss occurs, protection action is generated.

2. Measurement functions 

  2) Current measurement: motor A, B, C three-phase current detection.

3. Communication Interface

  2) External communication: external device and controller communication, RS485 communication,
      standard MODBUS protocol.

4. Open and out

  2) Out of 7 points, contact capacity of 10A / 250VAC, no power out.

5. The user interface