When vacuumizing the transformer, measure the elastic deformation of the transformer body, which shall not be greater than the requirements specified in the standard.<br> Exhaust and oil sample inspection:<br> After oil injection, the transformer is allowed to stand still, and after reaching the time required by the standard, the residual gas in each part of the transformer is discharged. After the insulation oil in the transformer body has stood still for the time required by the standard, oil samples shall be taken and sent to relevant departments for oil sample analysis.
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