DGVCL Exam Paper (11-12-2011)
The insulation coordination for UHV lines (above 500 kV) is done based on

Voltage level of the line
Lightning surges
Lightning and switching surges
Switching surges

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DGVCL Exam Paper (11-12-2011)
Hysteresis in an instrument means

The inaccuracy due to change in temperature
The repeatability of the instrument
The reliability of the instrument
The change in the same reading when the input is first increased and then decreased

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