Answer / kunal

It is a large encased group of metal plates about the size
of a small house with 2 sets of insulated copper wires
wrapped around the plates -an input and output - to convert
a very high supply line voltage - maybe 44 thousand volts
to a lower voltage of 2200 volts that runs down the power
line poles in your neighborhood. Look at your street's
power poles and you will see a mini substation that
converts he 2200 volt to 220 volts and may supply several
homes.

Actually a substation transformer for a distribution
substation will reduce the incoming voltage from 115,000
volts or 69,000 volts to a lower voltage closer to 7200
volts that runs down the power poles in your neighborhood.
At your house there will be a small transformer that
reduces the voltage from 7200 volts to 240 volts to meet
the needs in your home.

When capacitor bank connect on line. It's draw some current but it's current not increase of main line ammeter. Why?

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