Daniel Walker

The standards for dissolved gas analysis of transformer oil typically reference methods including IEC 60567 and ASTM D3612, which outline the procedures for sampling and analyzing the gases dissolved in transformer oils, such as hydrogen, methane, ethane, and others. These standards specify the appropriate equipment, sampling techniques, and analytical methods to provide accurate and reliable results. Compliance with these standards is essential for assessing the condition of transformer oil and diagnosing potential issues in transformers, ensuring the reliable operation of electrical equipment. Regular dissolved gas analysis helps detect insulation breakdown, overheating, and other electrical faults, making it a critical practice in transformer maintenance.

BDV (Breakdown Voltage) testing of transformer oil measures the oil’s dielectric strength, or its ability to withstand electrical stress without breaking down. The test involves applying a gradually increasing voltage to the oil sample until it breaks down, indicating the voltage level at which the oil can no longer provide effective insulation. High BDV values indicate good insulating properties, while low values suggest contamination or degradation.

No, dry-type transformers are not filled with oil. Instead of using oil for cooling and insulation, they rely on air or other gases to dissipate heat. Their design eliminates the need for liquid insulation, making them safer and more environmentally friendly for certain applications.