we have two generators different capacity on 15 MW and other 6MW at 11 KV , 15 MW gen. bus short level current 40KA,and 6MW short level current 25KA,, length of cable 100MTR between 6 MW from 15MW gen. for bus coupling . kindly tell any one can we use both NGR OR one NGR from any GEN. BOTH NGR has diff. rating. Tariq pakistan
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Answer Posted / Sheetal Kumari
The choice of using multiple NGR (Network Grounding Resistors) or a single NGRT (Network Grounding Resistor Transfer) for bus coupling depends on various factors such as the system grounding scheme, fault level, cable length, and rating of the NGRs. Given the difference in ratings of the two NGRs, it might be necessary to use different ratings for optimal performance. However, without additional information about the specific system and grounding scheme, it's difficult to provide a definitive answer.
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