Answer / vitthal upare

In star speed of motor is very low with low amp.
and in delta motor running with its normal rated speed with
rated amp.
So generally for motor starting purpose star used and
afterthat its change over to delta

Answer / nithi

for a same power rating the current in delta connected load
is 1.732 times lesser than the star connected load (heat
loss is less) &also if one phase get opened the other two
phases will serve the load i.e.good stability.but in safety
point of view, star connected load is better than delta
load.because earthing can be done without the help of
earthing transformer.

Answer / vitthal upare

Dear Subhash
Yes speed of motor will remain same in star and delta both

Answer / subash

Mr.Vitthal upare there no relation between speed of motor
and star connection

The speed will be same in STAR or DELTA

SPEED IS RELATED TO NO OF POLES AND FREQUENCY RIGHT

I am getting above 60 V as open delta voltage against single phase unit ICT at tertiary delta formed and ICT getting trippped on NDR. ICT tested and found in order. PTs provided on tertiary are tested and in order. what may be the reason?

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