There are many neutral grounding options available for both Low and Medium voltage power systems. The neutral points of transformers, generators and rotating machinery to the earth ground network provides a reference point of zero volts.
This protective measure offers many advantages over an ungrounded system, like:
· Reduced magnitude of transient over voltages
· Simplified ground fault location
· Improved system and equipment fault protection
· Reduced maintenance time and expense
· Greater safety for personnel
· Improved lightning protection
· Reduction in frequency of faults.
METHODS OF NEUTRAL GROUNDING:
There are five methods for Neutral earthing:
- Unearthed Neutral System
- Solid Neutral Earthed System
- Resistance Neutral Earthing System:
- Low Resistance Earthing
- High Resistance Earthing
- Resonant Neutral Earthing System
- Earthing Transformer Earthing
