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The effect of soft starter on motor
1: Reduce the surge current when the equipment starts. When soft starting, the starting current is generally 2~3 times the rated current, and the grid voltage fluctuation rate is generally within 10%, which has very little impact on other equipment.


2: Eliminate the harm to the power grid The impact of the large current directly started by the super-large motor on the power grid is almost similar to the impact of a three-phase short circuit on the power grid, which often causes power oscillation and makes the power grid lose stability. When soft starting, the starting current is greatly reduced. completely exempt.


3: Reduce damage to motor equipment. The starting torque of full pressure direct starting is about twice the rated torque. Such a large torque is suddenly added to the static mechanical equipment, which will accelerate gear wear and even beating, and accelerate belt wear. Even breaking the belt, accelerating the fan blade fatigue or even breaking the fan blade and so on. The soft start torque will not exceed the rated torque and the influence can be completely eliminated.


In addition, the main advantages of choosing Xiangchuang soft starter are as follows:


1: Cost-effective. After the online soft start is completed, the thyristor runs online, and there is no need to connect the bypass contactor. The price difference between the online device and the bypass device cannot buy a contactor at all. wait for these costs.


2: The quality is stable. In recent years, the sales volume of the online device has been far behind the bypass device, and the gold thyristor technology of the online device has been very stable.


3: The wiring is simple. The online soft starter can directly output the upper three-phase power supply, and the lower end output is connected to the motor, and it can be used.


4: Frequent startup. Since there is no cooling fan on the bypass soft starter, the soft starter will heat up in the case of heavy load startup, and the bypass needs a long interval to cool down. The online soft starter has a built-in cooling fan to dissipate heat quickly.


5: Requirements for voltage. The online soft starter is built-in module operation, which can operate under low voltage or unstable conditions. The bypass soft starter is to start and complete the switching contactor operation, and the working voltage of the contactor coil cannot be 330V.