Initially make the following settings in the relay
Variation: Operating value UA /UN from 0.3 to 0.7 in steps of 0.1 (The nominal voltage UN of the relay input is 100 V). Slowly raise the voltage, starting each time from 0 V, until the relay operates. voltage is necessary because of the delayed reaction of the relay of 0.5 s.) Enter the measured voltage values in the table below
Repeat the above measurements for reset ratios of and 0.9 and 0.99