bytebyte
Electrical
- Sep 25, 2005
- 32
The utility company that I work for requires our customers to maintain a BIL of 120kV for 15kV service. The customer wants to install a pin insulator with a CFO rating of 105kV.
I noticed that the distribution insulators are rated according to their CFO value instead of BIL value. CFO is the voltage at which the probability of flashover is 50% and BIL is the measure of the ability of the insulation system to withstand very high voltage surges. But what is the conversion or relation between CFO and BIL? Thanks.
I noticed that the distribution insulators are rated according to their CFO value instead of BIL value. CFO is the voltage at which the probability of flashover is 50% and BIL is the measure of the ability of the insulation system to withstand very high voltage surges. But what is the conversion or relation between CFO and BIL? Thanks.