electricalscho

The greatest longitudinal force that a substance can bear without tearing apart or rupturing; also called ultimate tensile strength.

Technical Committee 57 working for the IEC and responsible for producing standards in the field of protection (e.g. IEC 61850)

A mechanism usually fitted to the primary winding of a transformer, to alter the turns ratio of the transformer by small discrete amounts over a defined range.

The ratio of the power system source impedance to the impedance of the protected zone.

The time between fault inception and CB contacts making on successful re-closure.