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NO LOAD AND BLOCKED ROTOR TEST ON 3- PHASE INDUCTION MOTOR
#1

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AIM:
To conduct the no load & blocked rotor test on 3- phase induction motor
& to draw the equivalent circuit of 3- phase squirrel cage induction motor.
FUSE RATING :-
125/100 * 7.5 A 10A
THEORY :-
A 3-phase induction motor consists of stator, rotor & other associated parts. In the stator
,a 3- phase winding (provided) are displaced in space by 120. A3- phase current is fed to the winding so that a resultant rotating magnetic flux is generated. The rotor starts rotating due to the induction effect produced due the relative velocity between the rotor
Winding & the rotating flux.
PRECAUTIONS :-
NO LOAD TEST

(1). Initially TPST switch is kept open.
(2). Autotransformer must be kept at minimum potential position.
(3). The machine must be started at no load.
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