As the name suggests, KPM-OBD+ is used for measuring breakdown strength of the insulating oil.

- The dielectric strength of an insulating oil is a measure of the oils ability to withstand electrical stress without failure.
- The test involves applying an ac voltage at a controlled rate to two electrodes immersed in the insulating fluid. The gap is a specified distance. When the current arcs across this gap, the voltage recorded at that instant is the dielectric strength/breakdown strength of the insulating liquid.
- Onsite BDV testing of Insulating Oil – A better option On-site testing has unmatched advantage as it provides us immediate results.
- It is highly useful in case of emergencies & making quick decisions for most critical part of power
system i.e. Power Transformer .
- If a suspicious result is obtained, it is usually possible to repeat the test without delay and, if the
problem is confirmed, the affected transformer can be taken out of service immediately.