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Our transformer oil is produced by optimum refining of carefully selected paraffine and naphthene base oil and then for improvement of the electrical properties it is further processed by the newest dehydrating and deaerating facilities. So, it excels in flash point, pour point, oxidation stability and corrosion resistance etc. satisfying IEC-296, 60296, BS-148, JIS C-2320, ASTM D3487 etc. and receives recognition as top class products for various type of transformers. |
The grades we normally exports are as follows. |
|
UNINHIBITED OILS
| STANDARD | BS148/1972 | I.E.C. 296/1982 | I.E.C. 60296/2003 | |
| - | CLASS I | - | ||
| Appearance | Clear & Bright | Clear & Bright | Clear,Free from sediment | |
| Density @20oC (kg/m3) | 0.895 max. | 0.895 max. | 0.895 max. | |
| Viscosity (cst) |
- 40.0 max. (20oC) 800 max. (-15oC) - |
16.5 max. (40oC) - 800 max. (-15oC) - |
12.0 max. (40oC) - - 1800 max. (-30oC) |
|
| Pour point (oC) | -30 max. | -30 max. | - 40 max. | |
| Flash point (oC) | 140 min. | 140 min. | 135 min. | |
| Color | 0.5 max. | 0.5 max. | - | |
| Neutralization No. (งทKOH/g) | 0.03 max. | 0.03 max. | - | |
| Acidity (งทKOH/g) | - | - | 0.01 max. | |
| Corrosive Sulfur | noncorrosive | noncorrosive | noncorrosive | |
| Water content (ppm) | 35 max. | 30 max. | 30 max. | |
|
Antioxidant additives (wt. %) |
not detectable |
not detectable |
not detectable | |
| 2-Furfural content (mg/kg) | - | - |
0.1 max. |
|
|
Oxidation Stability |
Sludge : (wt. %) |
0.1 max. (@ 100oC, 164hrs.) |
0.1 max. (@ 100oC, 164hrs.) |
0.8 max. (@ 120oC, 164hrs.) |
|
T.A.N.: (งทKOH/g) |
0.4 max. (@ 100oC, 164hrs.) |
0.4 max. (@ 100oC, 164hrs.) |
1.2
max.
(@ 120oC, 164hrs.) |
|
| Dielectric
Strength
(Breakdown Voltage), (KV) |
- - as delivered: 30 min. |
- after treatment : 50 min. as delivered : 30 min. |
before treatment:30 min. after treatment :70 min. - |
|
| Dissipation Factor @ 90oC (%) | 0.005 max. | 0.005 max. |
0.005 max. |
|
| Interfacial tension (mN/m) | - | 40 min. | 40 min. | |
| PCA (wt. %) | 3 max. | - | 3 max. | |
| PCB (ppm) | not detectable | not detectable | not detectable | |
| Equivalent Specification No. |
JIS C 2320 CLASS 1, NO.2 |
JIS C 2320 CLASS 1, NO.4 |
BS148/1998 CLASS I |
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INHIBITED OILS
| STANDARD | I.E.C. 296/1982 | I.E.C.60296/2003 | ||
| CLASS II | CLASS II A | - | ||
| Appearance | Clear & Bright | Clear & Bright | Clear,Free from sediment | |
| Density @20oC (kg/m3) | 0.91 max. | 0.91 max. | 0.895 max. | |
| Viscosity
(cst) |
3.0 max. (100oC) - 21.0 max. (20oC) - - |
3.0 max. (100oC) 12.0 max. (40oC) - 76.0 max. (0oC) - |
- 12.0 max.(40oC) - - 1800 max.(-30oC) |
|
| Pour point (oC) | -40 max. | - 40 max. | -40 max. | |
| Flash point (oC) | 145 min. | 145 min. | 135 min. | |
| Color | 0.5 max. | 0.5 max. |
- |
|
| Neutralization No. (งทKOH/g) | 0.025 max. | 0.03 max. |
- |
|
| Acidity (งทKOH/g) | - | - | 0.01 max. | |
|
Corrosive Sulfur @140oC, 19Hrs. |
noncorrosive | noncorrosive | noncorrosive | |
| Water content (ppm) | 35 max. | 35 max. | 30 max. | |
| 2-Furfural content (mg/kg) | - | - | 0.1 max. | |
|
Antioxidant additives (wt. %) |
0.08 max. |
0.08 min., 0.3 max. |
0.08 min., 0.4 max. |
|
|
Oxidation Stability |
Sludge : (wt. %) |
0.15 max. (@ 110oC, 72hrs.) 0.3 max. (@ 110oC, 164hrs.) |
0.1 max. (@ 110oC, 72hrs.) 0.2 max. (@ 110oC, 164hrs.) |
0.8 max. (@ 120oC, 500 hrs.) |
| T.A.N.: (งทKOH/g) |
0.5 max. (@ 110oC,72hrs.) 0.6 max. (@ 110oC, 164hrs.) |
0.3 max. (@ 110oC,72hrs.) 0.4 max. (@ 110oC, 164hrs.) |
1.2 max. (@ 120oC,500 hrs.) |
|
| Dielectric
Strength
(Breakdown Voltage), (KV) |
disk electrodes : 30 min. |
disk electrodes : 30 min. |
before treatment:30 min. after treatment :70min. |
|
| Dissipation Factor (%) |
0.05 max.(@ 20oC) 0.3 max.(@ 100oC) |
0.05 max.(@ 25oC) 0.3 max.(@ 100oC) |
0.005 max. (@ 90oC) | |
| Interfacial tension (mN/m) | 40 min. | 40 min. | 40 min. | |
| PCA (wt. %) | - | - | 3 max. | |
| PCB (ppm) | not detectable | not detectable | not detectable | |
| Equivalent Specification No. |
ASTM D 3487 TYPE I CSA C-50 (1997) |
ASTM D 3487 TYPE II |
ASTM D3487 TYPE II |
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