GETCO Exam Paper (30-11-2008)
If a combination of HRC fuse and a C.B. is employed, the C.B. operates for

under all abnormal currents
low over load currents
short circuit currents
this combination is never employed in practice

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

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

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