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The nynas nitro libra oil testing as an isolator on the 150 KV transformer using colour, water content, and breakdown voltage testing method in bantul substation

The testing result shows that crude oil indicates D 8,0 (black colour), with moisture content TRACE (0.2%) which is 4 ppm. The value of 6-time breakdown voltage test in the temperature of 22°C indicates: 09.4 kV, 09.1 kV, 09.2 kV, 09.6 kV, 09,5 kV, 12.0 kV with dielectric power 3.92 kV/mm. | The nynas nitro libra oil testing as an isolator on the 150 KV transformer using colour water content and breakdown voltage testing method in bantul substation