Quick Break Operating Mechanism
A spring-loaded ejection system ensures a quick break (15 ms) of the contacts.
With MELTRIC plugs and receptacles, the circuit is broken simply by depressing the pawl.* Doing so releases the energy in the spring-loaded operating mechanism, which instantaneously breaks the circuit and ejects the plug to the OFF position. Contact breaking time is about 15 milliseconds. The quick break mechanism is automatically reloaded when the plug is re-inserted.
In contrast, the disconnection speed of pin and sleeve and twist type devices is dependent on the user’s motion and strength when removing the plug.
* DB Series plugs and receptacles require the turning of an operation ring.