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How do I perform maintenance on a dry type transformer?

BEFORE ATTEMPTING REPAIRS, FOLLOW THE INSTRUCTIONS SET FORTH BELOW. DE-ENERGIZE THE TRANSFORMER BEFORE MAKING REPAIRS. FAILURE TO DO SO COULD RESULT IN SEVERE PERSONAL INJURY, DEATH, OR PROPERTY DAMAGE.

It is the responsibility of the owner to inspect, maintain and keep the transformer in good repair. Report all failures during the warranty period to your local sales office prior to repairs. All warranty repairs must be made or approved by the manufacturer. Practically no maintenance is required on a dry-type transformer but inspect it periodically as indicated below:

• De-energize transformer
• Check for any accumulation of dust or dirt on the terminations
or vents. If necessary, remove by vacuuming,
brushing, or blowing dry air. Special care should
Effective February, 1998
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be taken when blowing with dry air to prevent further
damage to the product or injury to maintenance personnel
from flying particles.
• Inspect insulators, terminals, terminal boards, for
tracking (discharge), breaks, cracks, or burns. Clean
or repair if necessary.
• Check terminal quality and connections for tightness.
Replace or tighten as necessary.
• Inspect ground connections and ground contact surfaces.
Tighten or repair if needed.
• For ventilated designs only, if moisture is evident, the
unit should be dried out by placing it in an oven or by
blowing heated air over it. The temperature should
not exceed 110°C (230°F) to prevent damage to
installation wiring.
• Inspect the paint finish for scratches or wear. Repair
the finish if necessary.
For a selection of Eaton's Transformers please see our Catalog Volume 2 Tab 2.