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Possible examples for insulating oils: ARAL: Isolan, Shell: Diala D, further producers: ESSO, BP, etc. |
Our example: Shell Oil Diala D
Properties:
Shell Oil Diala D is a specially refined naphthenic insulating oil with high oxidation stability, good electrical and excellent low-temperature properties.
Application:
Shell Oil Diala D is recommended for use in transformers, rectifiers and switchgears.
Typical Data:
Shell Oil Diala D meets the following specifications:
* DIN 57 370-I/VDE 0370, Part 1, Class A
* IEC 296, Class I and II
* BS 148: 1972 |
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Requirements of
DIN 57370-1/VDE 0370
Part I, Class A |
Shell Oil
Diala D |
| Appearance |
DIN 57370 |
clear, free of solids |
complies |
Density at
15°C kg/m²
20°C kg/m² |
ISO 3675
ISO 3675 |
< 895 |
884
881 |
Kinematic Viscosity
at 40°C mm²/s
at -30°C mm²/s |
ISO 3104 |
< 12
< 1800 |
8.1
730 |
| Flash Point P.M. °C |
ISO 2719 |
< 135 |
138 |
| Neutralisation value mg KOH/g |
IEC 62021-1 |
< 0,01 |
< 0,01 |
| Corrosive sulphur |
DIN 51353 |
non-corrosive |
non-corrosive |
Breakdown voltage kV
(after treatment) |
IEC 60156 |
> 70 |
> 70 |
| Dielectric dissipation at 90°C (after treatment) |
IEC 60247 |
< 0,005 |
0,001 |
Oxidation stability Baader
(140h/110°C)
Neutralisation value mg KOH/g
Sludge content % m
Dieelectr. dissip. factor at 90°C |
DIN 51 554 |
< 0,60
< 0,05
0,180 |
0,09
0,02
0,11 |
Oxidation stability
(164h/120°C)
Neutralisation value mg KOH/g
Sludge content % m
Dieelectr. dissip. factor at 90°C |
IEC
61125 C |
< 1,2
< 0,8
< 0,5 |
0,10
0,03
0,15 |
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