MGVCL Exam Paper (30-07-2021 Shift 3)
What are the main challenges that the electric grid faces?

Increase in Energy Demand
Global rise in temperature
Reliability and Power Quality is Declining
All of these

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MGVCL Exam Paper (30-07-2021 Shift 3)
Continuous and rapid variations in the load current magnitude which causes voltage variations is known as

Flicker
Harmonics
Voltage distortion
Voltage sag

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MGVCL Exam Paper (30-07-2021 Shift 3)
The DC offset in fault current causes conventional over-current (OC) relays to :

over-reach
reach remains unaffected due to DC offset
under-reach
sometimes under-reach and sometimes over-reach

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