Answer / neeraj pandey

voltage value is the Line to Line Voltage. Line to line
voltage is the voltage between any two phase lines.
In single phase there is one phase and another is earth wire
and voltage between them is 230V approx.
In two phase the line voltage is 1.732 times of the single
phase voltage and the value is 415 V approx.

In three phase system the value of voltage between two
phases are taken which is same as two phase system.

if we take the voltage diff between all three phases it will
be ZERO..

Answer / pillay

Single phase voltage is 240 volts and two
or three phase voltage is 415v because
the voltages are actually spaced 120 degrees
in between them in a cycle .Further more you
measure the potential difference in between
any of them.

A commercial Building is designed with 14th floor levels with indoor substation of three phase transformer with rated capacity of 1000 Kva.The transformer delivered 65% of its rated capacity at 0.67 power factor lagging.Because of low power factor, the power customer was penalized and certain cost was charged accordingly based on every point percentage lower than 85%.This situation may repeatedly happen on the succeding energy bills of power customer.The power customer is desired to improve its historical power factor of 0.67 lagging and no further penalty be impose by the local power company on the next bill. Q: Identify the appropriate solution you want to offer to Client?.Justify SCIENTIFICALLY and MATHEMATICALLY the principles behind the solution.

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