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Insulating oil specification

The insulating oil we use has the following typrical characteristics:

Property Units Method Requirements (IEC 60296)
Appearance     – IEC 60296 clear, free from sediment
Density at 15 °C kg/m³ ISO 3675        –
Density at 20 °C kg/m³ ISO 3675 < 895
Kinematic viscosity at 40 °C mm²/s ISO 3104 12 max
Kinematic viscosity at -30 °C mm²/s ISO 3104 1800 max
Flashpoint P.M °C ISO 2719 135 min
Pourpoint °C ISO 3016 < -40
Neutralisation value mg IEC 62021-1 0,01 max.
Corrosive sulphur     – IEC 62535  
Corrosive sulphur     – ASTM D 1275 B  
Corrosive sulphur     – DIN 51353 not corrosive
Breakdown voltage untreated kV IEC 60156 min 30
Breakdown voltage after treatment kV IEC 60156 min 70
Water content (ex works) ppm IEC 60814 40 max (IBC) 30 max (bulk)
Dielelectric dissipation factor at 90 °C     – IEC 60247 0,005 max
Oxidation stability (164 h / 120 °C)
Neutralisation value mg KOH/g IEC 61125 C 1,2 max
Sludge content % m IEC 61125 C 0,8 max
Dielelectric dissipation factor at 90 °C     0,5 max
Oxidation stability Baader (140 h / 110 °C)
Neutralisation value mg KOH/g DIN 51554     –
Sludge content % m DIN 51554     –
Dielelectric dissipation factor at 90 °C         –

Whilst future production will conform to this specification, variations in these characteristics may occur.