go to the Transformers product page sridhar g asked on Apr 9th, 2018 in Transformers

Why is the transformer wheel roller insulated ?

And why is it necessary ?

Giuseppe Petrelli, Global Marketing and Sales Manager

ABB's answer

When customer wants to monitor tank currents or activate a protection relay based on tank currents in case of faults, it becomes necessary to isolate the wheels from tank base, so that fault current does not get bypassed to ground through wheels.
In these cases all cabinets which are mounted on the transformer tank should also be insulated from main tank using suitable Fiber or Rubber insulation.

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  • Giuseppe Petrelli

    Giuseppe Petrelli

    Global Marketing and Sales Manager


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