KHIA headerKnow-How in Action

VOL XXVII, NO 43

Belzona® Seals Oil Leaks On Transformer Bushings

 
 

Industry:

Power (POWR)

 
 

Application:

Valves, Pipes and Fittings (VPF)

 
 

Customer Location:

Gas-Fired Power Plant - Toronto, Canada

 
 

Application Date:

June 2012

 
 

Application Situation:

During the summer outage, the maintenance crew  noted that some oil was present in the sump pit beneath the transformers.

 
 

Problem:

It was noted that a small oil leak was present at the bushing. No oil should leak from this bushing. The heavy electrical cables were not supported adequately.

 
 

Products:

Belzona 1161 (Super UW Metal)

 

Substrate:

Ceramic & Metal

 
 

Application Method:

Application was carried out in accordance with Belzona Know-How System Leaflet VPF-11. The ceramic insulator was roughened with a Dremel before applying the Belzona 1161 by brush to seal the oil leaks.

 
 

Belzona Facts:

The conventional alternative would have been to drain the transformers, replace the ceramic insulators including the bushings. It would have taken at least 2 days to complete this project. The application of Belzona 1161 as described only took 3 hours per transformer. Two transformers were completed within the same shutdown.

 
 

Photographs Description

  1. Transformer bushings 
  2. Ceramic insulator after abrading with Dremel and cleaning 
  3. Ceramic insulator and bushing masked off 
  4. Application completed
 
Case study pic one

 

 
 Case study pic two

 

 
 Case study pic three

 

 
 Case study pic four

 

 
 
For more information about Belzona visit: www.belzona.com