Typical Physical Characteristics
|
Property |
Units |
Method |
IEC 60296 Requirement |
Diala B |
|
|
|
|
|
|
||
|
|
|
|
|
|
|
|
Appearance |
|
IEC 60296 |
Clear, free from sediment and |
|
|
|
|
Complies |
||||
|
|
suspended matters |
||||
|
|
|
|
|
||
|
|
|
|
|
|
|
|
Density at 20 ºC |
kg/m3 |
ISO 3675 |
Max. 895 |
881 |
|
|
Kinematic viscosity at 40 ºC |
mm2/s |
ISO 3104 |
Max. 12 |
10 |
|
|
Kinematic viscosity at –30 ºC |
mm2/s |
ISO 3104 |
Max. 1.800 |
1.400 |
|
|
Flashpoint P.M. |
ºC |
ISO 2719 / ASTM |
Min. 135 |
140 |
|
|
D93 |
|||||
|
|
|
|
|
||
|
|
|
|
|
|
|
|
Pourpoint |
ºC |
ISO 3016 |
Max. -40 |
-57 |
|
|
|
|
|
|
|
|
|
Neutralisation value |
mg KOH/g |
IEC 62021-1 |
Max. 0,01 |
< 0,01 |
|
|
|
|
|
|
|
|
|
Corrosive Sulphur |
|
DIN 51353 |
Not corrosive |
Not corrosive |
|
|
|
|
|
|
|
|
|
Corrosive Sulphur |
|
IEC 62535 |
– |
Not corrosive |
|
|
|
|
|
|
|
|
|
Corrosive Sulphur |
|
ASTM D 1275 B |
– |
Not corrosive |
|
|
|
|
|
|
|
|
|
Breakdown voltage |
kV |
IEC 60156 |
|
|
|
|
Untreated |
|
|
Min. 30 |
>30 |
|
|
After treatment |
|
|
Min. 70 |
>70 |
|
|
|
|
|
|
|
|
|
Dielectric Dissipation Factor |
|
IEC 60247 |
Max. 0,005 |
0,002 |
|
|
(DDF) at 90 ºC |
|
||||
|
|
|
|
|
||
|
|
|
|
|
|
|
|
Oxidation Stability |
|
IEC 61125 C |
|
|
|
|
(164 h /120 ºC) |
|
|
|
||
|
|
|
|
|
||
|
Total acidity |
mg KOH/g |
|
Max. 1,2 |
0,9 |
|
|
Sludge |
%m |
|
Max. 0,8 |
0,3 |
|
|
DDF at 90ºC |
|
IEC 60247 |
Max. 0,5 |
0,1 |
Specifications
Shell Diala B meets the following specification:
- IEC 60296 (2003)
- Table 2 Transformer Oil (U), uninhibited
Shell Diala B meets both the established and the new industry copper corrosion tests.
Applications
Shell Diala B is a non-inhibited insulating oil manufactured from naphthenic feedstocks. It offers good dielectric properties, good oxidation stability and provides efficient heat transfer. It has excellent low temperature properties achieved without the use of pour point depressants.
For use in:
- Transformers – Electrical insulating oil for grid and industrial transformers.
- Electrical equipment – Components such as rectifiers, circuit breakers and switchgears.