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, allow the transformer to stand still until the time required by the standard is reached, and then discharge the residual gas from all parts of the transformer. 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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