Answer / navin

As per IS rules in India

50 hz is the standard frequency
with a tolerance of +\- 3%.

Answer / shekhar

50 hz

Answer / ashokreddy r

50 hz is the standard frequency
with a tolerance of +\- 1.5

Answer / rabi

50HZ+/-5%

Answer / bh.s.surya rao

50hz

Answer / rajesh kumar singh

50 cycle/second and tolrence +,
-3%

Answer / bharti singh

the standard frequency in india is 50 Hz, and tolernce is +
& -3%. and u can say + & -1.5.

Answer / apeksha

50 hz, and I think it is in between -3% to -5% tolerance

Answer / mousumi

+-5% of rated value.

Answer / chandu

as per indian standerds frequency is 50Hz with
+5% or -5% of variation.

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