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Positive/Direct Opening, IEC/EN60947

Positive Opening Operation (of a contact element):
The achievement of contact separation as the direct result of a specified movement of the switch actuator through non-resilient members (e.g.: not dependent on springs).

The term Positive Opening is used throughout NFPA 79, and in IEC 60947-5-1, and EN 60947-5-1. Direct Opening is the term referred to in NEMA ICS-5, part 6 (direct opening action). The terms Positive Opening and Direct Opening identify the same contact action and characteristics.

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