<p style="text-align:justify"><span style="font-size:14px">These relays do not have any intentional time delay for operation. Such a relay operates within 1 to 3 cycles (20-60 milliseconds in 50 Hz system). It is a general practice to define the time of operation of the instantaneous overcurrent relay at 5 times the set value (pick-up current).</span></p>

<p style="text-align:justify">&nbsp;</p>

<p style="text-align:justify"><span style="font-size:14px">We will not talk about electromechanical constructions of instantaneous relays, as these have become outdated. We will see the static construction (those of a static relay) later.</span></p>