Switchgear & Protection | Define: i) Arcing time ii) Recovery time iii) Arcing voltage iv) Rate of rise of restriking voltage

i) Arcing time: It is the time measured from the instant of occurrence of cut off (or commencement of arc) to the instant at which arc is extinguished.

ii) Recovery time: The time required for piece of equipment to resume its usual condition following an action, such as the passage of a current through electrical equipment. 

iii) Arcing Voltage: The voltage existing between the circuit breaker contacts during arcing is called as the arc voltage.  

iv) Rate of Rise of Restriking Voltage: The RRRV (Rate of Rise of the Restriking Voltage) is defined as the slope of the steepest tangent to the restriking voltage curve. It is expressed in volts per micro-second.