6 Questions
What is the primary function of low-impedance grounding?
To limit the fault current and permit selective protective relaying
What is the typical location of a low-impedance grounding device in a distribution station?
In the neutral of the delta-wye supply transformer
What is the advantage of using line-to-neutral equipment insulation in a low-impedance grounded system?
It is not affected by the ground faults
What is the purpose of a wye-grounded-delta transformer or a zigzag transformer in a low-impedance grounding system?
To provide a low-impedance path for fault current when a delta-connected transformer exists
What is the range of line-to-ground fault currents in a low-impedance grounded system?
50-600 A
What is the purpose of the zero-sequence network shown in Figure 7.15?
To analyze the fault current in a low-impedance grounded system
Learn about the low-impedance grounding method used to limit line-to-ground fault currents in power systems. This technique allows for selective protective relaying and cost advantages. Test your knowledge of this important concept in electrical engineering.
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