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Rolling door motor direct start

- May 31, 2017 -

Rolling door motor direct start:

Under normal circumstances, the power unit if a dedicated transformer power supply, and the motor is not frequent start, the motor capacity is not greater than 30% of the power transformer capacity, allowing direct start; if the motor is frequent start, the motor capacity No more than 20% of the capacity of the power supply transformer, allowing direct start. If the power unit without a dedicated transformer power supply, as long as the motor directly start the current in the grid caused by the voltage drop does not exceed 10% -15%, allowing the use of direct start.


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