Question
Download Solution PDFWhat should be the value of earthing resistance for large power stations?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFMaximum permissible resistance of earthing system for different cases is given below.
Power Station |
Maximum permissible resistance |
Large power station |
0.5 ohms |
Major sub-station |
1.0 ohms |
Small sub-station |
2.0 ohms |
In all other cases |
8.0 ohms |
The earth continuity inside an installation |
1.0 ohms |
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