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Basic protection includes the protection functions of over-heat, short -current
protection and input failure-phrase protection when starting, but no protection
of internal connector instantaneous-shop. we can se he protection glade when the
motor is no need to be stopped urgently, such as fire pump.
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The light-load protection, standard protection and heavy-load protection all
have the every protection function of soft standard. The difference among them is
the surges o Mot overload heat-protection. See the diagram of 6.1 and Form 6.1.
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When the motor in the best protection starting, it can be protected most
perfectly.
The protection classes and the time of heat protection Form (Form 6.1)
Diagram 6.1
