GETCO Exam Paper (30-11-2008)
The normal difference between transmission lines and distribution lines is

The quantity of current carried by the lines
The cross sectional area of the conductors
The operating voltage
The quantity of power being transmitted by the lines

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GETCO Exam Paper (30-11-2008)
A buchholz will operate in a transformer whenever there is

over load
any of the above
large internal fault
saturation of magnetic circuit

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