Answer / gunnam santosh

as the frequency mainly depends on speed and number of poles
pn/120. basically 4 poles and 1500rpm motors are designed so
that we get 50hz frequency.

Answer / rupesh thakkar

Because most of indian power plant using 2 pole or 4 pole
and 2 pole genarater maintain 3000rpm and 4 pole genarater
1500 rpm. so we get 50Hz frequncy.

eq.

Ns=120F/p

Ns=synchrouns speed
F=frequncy
P=number of pole
120=span an angle

Answer / anas

i am noy sure of the answer.in india we are using hydro
electricity w

is IS says that neutral should be brought to switch box. and this one is a recomended practice

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