33kV Insulator dust deposits
33kV Insulator dust deposits
(OP)
Hi all,
We found dust spots (dust concentration) in the surface of an insulator (the trafo is under roof), and carbon spots also. I've attached a picture of the insulator there you can see the spots.
Is it possible that this can be internal cracking? (the trafo is 1st year in service) The tech havent found anything looking at it.
I've noticed the same phenomena in cast-resin trafos HV windings (33kV)
Any help will be much appreciated!!
Note: i'm not an experienced medium voltage tech...
regards,
Martín
We found dust spots (dust concentration) in the surface of an insulator (the trafo is under roof), and carbon spots also. I've attached a picture of the insulator there you can see the spots.
Is it possible that this can be internal cracking? (the trafo is 1st year in service) The tech havent found anything looking at it.
I've noticed the same phenomena in cast-resin trafos HV windings (33kV)
Any help will be much appreciated!!
Note: i'm not an experienced medium voltage tech...
regards,
Martín






RE: 33kV Insulator dust deposits
RE: 33kV Insulator dust deposits
Some guy from the mill said saw it sparking, then a tech cleaned it, and then no more sparks.
But anyone can tell something similar? It seems insulator damage to me but I'm not that experienced in HV.
thanks!!
RE: 33kV Insulator dust deposits
RE: 33kV Insulator dust deposits
I saw the same phenomena in the HV windings of cast-resin transformers
many thanks!
RE: 33kV Insulator dust deposits
Follow basic electrcial maintenance principles - keep it clean, cool, Dry and tight. And observe.
At first opportunity, lift and check for internal crack or sparking.
Regards,
NC
RE: 33kV Insulator dust deposits
RE: 33kV Insulator dust deposits
RE: 33kV Insulator dust deposits