- Belzona Recharges Shunt Reactor
In May 2012, an electricity substation in the South of England contacted Belzona in an effort to repair a shunt reactor suffering significant oil leakage. Fluctuation in temperatures combined with movement caused by vibration when in operation had caused the shunt reactor to discharge transformer oil. Due to difficulties in securing maintenance outages, this had been going on for several years.
Engineers at the power station requested that Belzona Technosol Ltd attend site and provide a long-term solution. Following a full site survey, oil discharges were evident from the bushings and inspection hatches situated within the shunt reactor.
A combination of the rapid curing Belzona 1291 (ES-Metal) and Belzona 1221 (Super E-Metal) was used to stem all of the active oil leaks. The flange joints were sealed by applying the oil tolerant repair composite, Belzona 1831 (Super UW-Metal) incorporating Belzona 9341 (Reinforcement Tape) to provide strength to the repair area.
The bolt and nut heads, together with the male studs were fully encapsulated using a disposable former containing Belzona 1831 (Super UW-Metal). Once cured, the formers were removed and the prescribed repair areas were coated with Belzona 5831 (ST-Barrier). This provided the shunt reactor with a barrier coating to prevent future galvanic corrosion and deterioration.
To date, the leak sealing project is still proving successful in recharging the transformer with oil to the correct level.