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What is meant by " Classification of earthing switches for short-circuit making" ?
Issue:
Understanding what is meant by electrical endurance of an earthing switch and its classifications

Environment:
MV equipment
SM6 RMU

Resolution:
According to IEC62271-102; the electrical endurance of an earthing switch is the short-circuit making capability of earthing switches to perform a defined number of short circuit making operations, without major maintenance. This shall correspond to one of the classes given in Table 1.

screenshot from IEC62771-102

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