Jhrj high voltage solid state soft starter
summary
Jhrj series medium and high voltage motor solid-state soft starter (hereinafter referred to as soft starter) is mainly applicable to the starting and stopping information and protection of squirrel cage asynchronous and synchronous motors. It adopts high-quality series thyristor to control the output voltage steplessly and make the motor start and stop smoothly. It has fault protection functions such as overload, phase loss, starting peak overcurrent, etc. using it can effectively avoid the harmful impact on the power grid caused by the excessive starting current of the motor, and can normally use the high-power motor under the limited power grid capacity and prolong its service life.
Service conditions
Power supply: three-phase AC 6kV ~ 10kV (+10%~15%) 50Hz
Applicable motor: three-phase asynchronous motor (squirrel cage type), synchronous motor, etc
Starting frequency: frequent starting
Cooling method: natural cooling or forced cooling
Outgoing mode: user's option
Protection grade: IP20 (self cooling), ipoo (air cooling) requires customization.
Environmental conditions: the altitude shall not exceed 1000 meters. If it exceeds 1000 meters, it is necessary to reduce the conditions for use
Ambient temperature: -25~+45 ℃
Relative temperature: 95% non condensing
There is no corrosive gas, conductive dust, no violent vibration [less than 0.5g), and the ventilation is good. For products requiring extra environment, please put forward additional technical requirements when ordering.
working principle
The thyristor high-voltage soft starter is actually connected in series between the three-phase AC phase voltage and the input terminal of the three-phase AC asynchronous (and synchronous) motor. By adjusting the conduction angle of three independent anti parallel thyristor valve components at the same time, the AC input voltage amplitude of three-phase asynchronous motor (and synchronous) is changed, so the three-phase input AC current is changed, so as to achieve the purpose of constant current starting or starting power shutdown according to the slope change curve.
After starting, the three-phase bypass contactor J will automatically close and the motor will be put into operation in the power grid. Input / output voltage waveform and current variation waveform.
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