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Can one soft starter control multiple motors for parallel starting?

Yes. The circuit configuration and soft starter selection depends on the application.

  1. Each motor must have its own overload protection.
  2. If the motors are the same size and are mechanically coupled, a constant current soft starter can be used.
  3. If the motors are different sizes and/or the loads are not mechanically interlocked, a soft starter with a timed voltage ramp (TVR) start profile should be used.
  4. The combined motor FLCs must not exceed the soft starter FLC.