What motor power requires a soft starter?
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What motor power requires a soft starter? 18.5KW Class 2 30KW Class 2
It generally depends on the requirements of the circuit switches and equipment regarding startup, as well as the capacity of the power supply and the equipment itself; there is no fixed value. Some systems with a capacity of a few kilowatts require voltage reduction or soft starting, while those with a capacity of thousands of kilowatts can start directly. You should consult the electrical department and the equipment department respectively. If there are no special requirements, direct startup should not be a problem.
What was said upstairs is completely correct; it has nothing to do with power rating, but rather relates to the power grid. It is mainly related to the supply transformer and the impedance of the wiring. During startup, if the voltage drop on the busbar is generally not less than 85%, then there is no need to design a soft start mechanism
https://bbs.hcbbs.com/thread-2723731-1-1.html, Daily Question: Judgment: The longer the motor takes to start, the lower its starting current. ( ) @sdscj0122, you haven’t answered the question I asked yet: sdscj0122: I can assure the moderator that the starting current of a motor has nothing to do with its starting time; it remains a constant value until the starting process is complete ； Me: 1. Is it just that the duration is different, and the heat output is different? 2. Do you mean that there is an upper limit for the starting current of a motor, and once that limit is reached the current remains constant; it’s only the duration that varies? 3. Is there a difference in the magnitude of the starting current below a certain current value?
Our 10Kv, over 500 kilowatt motors can also be started directly