VLF test of MV/HV cables
VLF test of MV/HV cables
(OP)
Dear All.
I would like ask you some not correct Q.
On this week-end (Merfi law) we had several faults on the MV cables in the same factory and I'm looking for explanation in the forum.
I found many posts about HIPOT, PD tests of cables. I learn a lot and understand many things ( of course not all
).
Many thanks to Benjamin Lanz for great explanation.
O.K., now my Q.: what is possible ( may be average ) price of VLF HIPOT Tester in k$. I would like recommend to several companies bay one unit.
Best Regards.
Slava
I would like ask you some not correct Q.
On this week-end (Merfi law) we had several faults on the MV cables in the same factory and I'm looking for explanation in the forum.
I found many posts about HIPOT, PD tests of cables. I learn a lot and understand many things ( of course not all
Many thanks to Benjamin Lanz for great explanation.
O.K., now my Q.: what is possible ( may be average ) price of VLF HIPOT Tester in k$. I would like recommend to several companies bay one unit.
Best Regards.
Slava






RE: VLF test of MV/HV cables
Other manufacturers are HVinc in the states.
What is the system voltage?
RE: VLF test of MV/HV cables
Our MV is up to 36kV.
Fault cases on 22kV cables.
Thanks.
Slava.
RE: VLF test of MV/HV cables
I think anything larger would have to go vehicle mounted
RE: VLF test of MV/HV cables
RE: VLF test of MV/HV cables
Thanks a lot.
I found several mnf, but I don't try bay it.
I only would like know what is a possible price level.
Test of cables it's not my area.
BTW, I hear about some ultrasound PD test, what is it?
Regards.
Slava
RE: VLF test of MV/HV cables
You are welcome for the explanations. The ultrasound technique is typically an on-line technique. Ultrasound is only likely to detect PD activity when the probe is nearly in contact with the source. This creates a very high potential for false negatives and positives. Generally this technique is only useful for exposed cable components and can be expected to accurately detect < 3% of defects in cable systems
Benjamin Lanz
Vice Chair of IEEE 400
Sr. Application Engineer
IMCORP- Power Cable Reliability Consultants