A motor starter unit has four basic functions:
isolating the load from mains,
protection against short-circuits,
protection against overload,
commutation or control (start - stop).
Each motor starter unit can be enhanced with additional functions depending on its purpose. These can be:
power: speed controller, soft starter, phase reversal, etc,
checking: auxiliary contacts, time-delay, communication, etc.
Additional practical information:
System User Guides
Function Block library
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