Recognizing Signs of Failing Transformer Bushings
Transformer bushings are electrical parts that shield and safeguard a transformer's high-voltage conductors. They are constructed from a range of materials, such as silicone rubber, porcelain, and resin.
Several factors can cause bushings to fail, including:
Corrosion: The insulation of the bushing can become damaged by corrosion, which can cause leaks and arcing.
Mechanical damage: The bushing may sustain mechanical damage as a result of a fall or lightning strike.
Age: Over time, bushings may degrade, developing cracks and leaks.
The following are some signs of failing transformer bushings:
Oil leaks: If you notice oil dripping from a transformer bushing, the insulation is likely broken.
Arcing: Arcing is a type of flash or spark that can be seen between a transformer's conductors. Arcing poses a fire risk and can harm the bushing.
Discoloration: A bushing's insulation may turn discoloured with time, which is an indication of wear.
Cracks: A bushing's insulating cracks may also indicate failure.
Loose connections: Arcing and other issues can be brought on by loose connections between the conductors and the bushing.
It is crucial to have the transformer evaluated by a licenced electrician if you notice any of these symptoms. Acting quickly is crucial because failing transformer bushings can constitute a significant safety risk.
Additional advice for avoiding transformer bushing failure is provided below:
Check the bushings for damage on a regular basis.
Maintain a clean, clutter-free environment for the bushings.
If necessary, swap out the bushings.
Use bushings of excellent quality that are intended for the purpose.
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