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Home » Soft Starters Knowledge » Soft starter stops modes
Soft starter stops modes
The soft starter has two stopping modes: soft stop and free stop. (see here for start modes)
Soft stop
When using this mode to stop the motor, the power supply of motor will be transferred from the bypass contactor to the controlled silicon of soft starter, and the output voltage of starter will be reduced gradually so that the running speed of motor can be cut down smoothly avoid mechanical shock. The output ending voltage is the same as the starting initial voltage. Soft stop mode can reduce or remove the surge of the loading equipment such as the water pump.
Free stop
When using this mode to stop the motor, the soft starter will cut off the connection to the bypass contactor and forbid the controlled silicon output voltage after receiving stopping command. The motor stops gradually with its inertia. One soft start connecting with two motors must use this free stopping mode. Generally, if the soft stop mode is not necessary, please choose the free stopping mode to prolong the service life of the soft starter. This mode completely forbids the instantaneous output; avoid instantaneous high current shock to the motor of specially applying.
Soft stop
When using this mode to stop the motor, the power supply of motor will be transferred from the bypass contactor to the controlled silicon of soft starter, and the output voltage of starter will be reduced gradually so that the running speed of motor can be cut down smoothly avoid mechanical shock. The output ending voltage is the same as the starting initial voltage. Soft stop mode can reduce or remove the surge of the loading equipment such as the water pump.
Free stop
When using this mode to stop the motor, the soft starter will cut off the connection to the bypass contactor and forbid the controlled silicon output voltage after receiving stopping command. The motor stops gradually with its inertia. One soft start connecting with two motors must use this free stopping mode. Generally, if the soft stop mode is not necessary, please choose the free stopping mode to prolong the service life of the soft starter. This mode completely forbids the instantaneous output; avoid instantaneous high current shock to the motor of specially applying.