Special surveillance, conditional /preventive maintenance
– Review the fasteners and clamping panels and supports.
– Check the mechanical condition of the transformer.
– Measurements of noise.
– Check the timing and balance coils’ hypertension.
– Review the determination of the plate.
– Inhale the dust and clean all accessible parts then blow the transformer to the ‘nitrogen or air dry.
– Use a cold degreaser to clean the resin and blocking.
– Check connection and power with voltages specified on the case of electronic converters.
– Change the fuse rating
– Revise the definition of current transformers.
– Perform a visual inspection and diagnosis with measurement of insulation resistance of windings.
– In the critical case, if the Buchholz relay is open? Then the replacement of the transformer will be required