PCB Retro-filling ... an economic solution
When a transformer meets certain criteria, it may be a valuable asset that if the PCB concentrations were to be reduced, it could remain in service. An example of this might be a larger transformer, which, from an electrical integrity perspective, has good oil qualities. However, PCBs are making it a liability. This unit can be retro-filled to reduce the PCB concentration in the transformer if a mobile dechlorination process is not a viable option. Some of the different types of retro-fill options are:
- Performing retro-fills and storing oil for a PCBX service rendered. Economic benefits show there must be a decent quantity of oil for this to be viable.
- Field retro-fills of larger transformers where a creative use of draining, dechlorination, and vacuum filling.
- The application of integrating PCBX and retro-filling to a maintenance shop where many, many small transformers can be serviced and the eventually repaired or PCB units are filled with dechlorinated oil.
