MGVCL Exam Paper (30-07-2021 Shift 1)
___ is the short time reduction in the rms voltage between 0.1 to 0.9 p.u for a duration of ___

Voltage swell, greater than 1 minute
Voltage sag, greater than 1 minute
Voltage swell, 0.5 cycle to 1 minute.
Voltage sag, 0.5 cycle to 1 minute.

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MGVCL Exam Paper (30-07-2021 Shift 1)
A single phase motor connected to 400 V, 50 Hz supply takes 30 A at a power factor of 0.7 lagging. Calculate the capacitance required in parallel with the motor to raise the power factor to 0.9 lagging.

99.5 μF
89.5 μF
79.5 μF
69.5 μF

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MGVCL Exam Paper (30-07-2021 Shift 1)
A grid interactive solar system:

always supplies power to the grid
always receives power from the grid
works only when the grid fails
supplies power to as well as receives power from the grid as required

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