Insulation Testing Method/s Commonly Used for 69 kV Lines
Insulation Testing Method/s Commonly Used for 69 kV Lines
(OP)
Hello everybody, would like to solicit methods or practices used in testing the integrity of the insulation of 69 kV lines.
We have a Megger-MIT 520 (insulation tester) with maximum voltage of 5kV can be injected. Is this enough for testing the insulation of a 69 kV line of about 15-20 km long?
We have a Megger-MIT 520 (insulation tester) with maximum voltage of 5kV can be injected. Is this enough for testing the insulation of a 69 kV line of about 15-20 km long?






RE: Insulation Testing Method/s Commonly Used for 69 kV Lines
Regards
Marmite
RE: Insulation Testing Method/s Commonly Used for 69 kV Lines
RE: Insulation Testing Method/s Commonly Used for 69 kV Lines
Of course when I was in the high voltage field service business, I had a client that wanted his overhead 13.8 kV hipotted. I argued a bit, ever tactfully, then did it for the guy who was signing my timesheet.
He had us do it every two years. Historical data was all over the scale from the influences Marmite lists.
old field guy
RE: Insulation Testing Method/s Commonly Used for 69 kV Lines
We've done the visual inspection already. The line to be tested is a newly constructed line not yet energized. We have a little doubt to some of the insulators being used in the line. And we wanted to test the insulators installed in the line before it is being energized.
It takes time and not practical for us to test the insulators installed for this long line. We might experience flashover if we proceed the energization to some points in the line that are weak.
galen1119
RE: Insulation Testing Method/s Commonly Used for 69 kV Lines
Alan
RE: Insulation Testing Method/s Commonly Used for 69 kV Lines
Regards
Marmite
RE: Insulation Testing Method/s Commonly Used for 69 kV Lines
We performed the tests to NETA specifications. We used a stackable highpot. I believe we performed the test to approximately 120kV. The test only included some overhead bus, switches, and fuses.
RE: Insulation Testing Method/s Commonly Used for 69 kV Lines