BDV (Breakdown Voltage) testing of transformer oil is a critical procedure to assess the insulating strength of the oil used in transformers. The test involves applying a steadily increasing AC voltage to oil samples placed between two electrodes until the oil breaks down and sparks. The voltage at which this occurs is recorded as the BDV value, typically measured in kilovolts (kV). A high BDV indicates good insulating properties, while a low BDV suggests contamination, moisture, or aging of the oil. Regular BDV testing ensures the transformer oil remains effective in preventing electrical discharges, thus protecting the transformer's internal components.
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