Answer Posted / jagadisha.n. bmsit
At the starting motor needs high torque to reach rated speed
so it will required more flux to get that torque hence it
takes more current from the supply, but the winding
resistance is too low to withstand this current.
we know that
in star phase current = sqrt(line current)
In delta line current = phase current
So current is reduced by sqtt(3) times in star so motor is
first connect to star and then delta
| Is This Answer Correct ? | 17 Yes | 16 No |
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WE ARE PLACE A NEW 75 KW MOTOR FOR JPF.IT IS CONNECTED IN M.C.C. WHEN WE ARE STARTING M.C.C.INCOMER IS TRIPPED.THEN WE ARE CONNECTED IN P.C.C WITH A MM30 RELAY PROTECTION THEN WE ARE STARTED MOTOR WILL RUN SMOOTHLY.
how pt is using
