About Refurbished Transformers
Unlike other suppliers, Prestine refurbished transformers are more than just a repainted transformer.
Every refurbished transformer we supply is assessed and tested by our engineers for its build quality, condition & reliability before entering our remanufacturing facility. Transformers which meet our stringent standards then go through our 40 point rebuild and refurbishment process.
The confidence we have in our experience, processes & testing standards is reflected in the industry leading warranties we offer.
Our Refurbished Transformer Process:
- De-tank and thorough examination of core and windings & oil test to identify any signs of stress, overloading or insulation breakdown
- Shotblast, prime and repaint tank, cable boxes, radiators and lid with two-pack high gloss exterior paint in dark admiralty grey (or other colour as required)
- Rebuild transformer and undertake any modifications required, replace worn parts, re-fill with new insulating medium and fit new gaskets and breather
- Fit any accessories and close couple LV/HV switchgear as required
Comprehensive test procedure:
- Insulation resistance-pressure-insulation resistance test (Megger test)
- Three phase winding resistance test
- Ratiometer test
