) Locking Test
(1) Lock the rotor, apply the power.
(2) As for returning type, perform test 10 times by connecting again as soon as possible after
that thermal protection device is operated.
(3) Measure the max. temperature of winding within the initial 1 hour and after 1 hour.
(4) As for the automatic returning type, measure the average value calculated by adding the
high-test and the lowest temperatures from 1 hour after initialing the test to 2nd hour and
the high-test and the lowest temperatures from 71st hour to 72nd hour, then devide it by 4.