GETCO Exam Paper (30-11-2008)
Two transformers are connected in parallel and share loads in the ratio of their kVA ratings when their ohmic impedances are

in direct ratio of their ratings
equal
purely reactive
in inverse ratio of their ratings

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

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

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