What is slow action?Last Updated: September 18, 2018
SPST-NC + SPST-NO Contact (Slow Action) Example
SPST-NC + SPST-NO contact slow action has a direct opening mechanism (forcibly opened contacts) defined under EN 60497-5-1. The NC contact side is the only side with a direct opening mechanism (forcibly opened contacts).
When contact welding occur, a plunger is pushed down to open the NC contacts and break the circuit.
DPST-NC Contact (Slow Action) Example