the time interval between the instant a specified change is made in the value of the input energizing quantity (the characteristic quantity for a measuring relay) which will cause the relay to disengage and the instant it disengages Found on http://www.electropedia.org/iev/iev.nsf/display?openform&ievref=446-17-11
the time interval between the instant a specified change is made in the value of the input energizing quantity (the characteristic quantity for a measuring relay) which will cause the relay to disengage and the instant it disengages