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Transformer oil or insulating oil is usually a highly refined mineral oil that is stable at high
temperature and has excellent electrical insulating properties. It is used in oil-filled power transformers, some types of high voltage capacitors, high voltage switches and circuit breakers. Its function is to insulate, suppress corona and arcing, and to serve as a coolant.
The oil helps cool the transformer. Because it also provides part of the electrical insulation between internal live parts, transformer oil must remain stable at high temperature for an extended period. To improve cooling of large power transformers, the oil filled tank may have external radiators through which the oil circulates by natural convection.
Transformer oil or insulating oil is usually a highly refined mineral oil that is stable at high temperature and has excellent electrical insulating properties.
It is used in oil-filled power transformers, some types of high voltage capacitors, high voltage switches and circuit breakers.Its function is to insulate, suppress corona and arcing, and to serve as a coolant.
The oil helps cool the transformer. Because it also provides part of the electrical insulation between internal live parts, transformer oil must remain stable at high temperature for an extended period. To improve cooling of large power transformers, the oil filled tank may have external radiators through which the oil circulates by natural convection. Sub standard & inferior quality of oil can harm the equipment in many ways and ensure to use only genuine and standard oil procured from reliable source only.
The easiest way to explain the reasoning for proper transformer oil maintenance is to compare a Transformer to a car. A car requires oil for lubrication while a Transformer requires oil for insulation and cooling. Just as a car requires regular checks of both oil quality and oil level, a transformer requires the same proactive treatment. Oil in each instance degrades over time resulting in the potential for failure or costly repair bills.
Oil procure from reliable source or use of “TRANSPOWER” Transformer oil will add years to the life of your Equipments/Transformer.
Applications of Transformer Oil
- Oil Filled Transformers
- Circuit Breakers
- Tap Changers
- Switches
- Fuses
- Oil-immersed electrical equipment
- Welding set
- X-ray Machine
- Submersible Pump<BR
“TRANSPOWER” Transformer oil manufactured by us meets the requirement or specification of following Standard and manufactured as per requirements of customers:
IS-335:93 With latest amendment, Bureau of Indian Standard
IEC-60296 of International Standard
BS-148 Class 1A & II of British Standard
ANSI/ASTM D3487 Type I & II
IEEE
Outstanding Features
Excellent Insulating Characteristics
High dielectric strength
Low Power factor inhibited to minimize the formation of acids and sludge from Oxidation
Better heat transfer properties than other traditional oil
Good low temperature fluidity due to very low pour point
Non corrosive to copper and copper alloys
- High Flash Point
- Free from PCBs
- Compatible with material used in Transformers & equipments
- Resists oxidation and deposit formation
Sub standard & inferior quality of oil can harm the equipment in many ways and ensure to use only genuine and standard oil procured from reliable source only.
| S..No. | CHARACTERISTIC | UNIT | AS PER IS 335:93 | AS PER BS 148 | AS PER IEC 296/60296 |
| 1. | Appearance | Clear & Transparent free from sediments | Clear & Transparent free from sediments Matter | Clear & Transparent and free from suspended matter and sediments | |
| 2. | Density at 29.5°C (Max.) at 20.0°C | g/cm3 g/ml | 0.89 | 0.895 | 0.895 |
| 3. | Viscocity 27 °C,40°C, -30°C | Cst,Mm2 /s
| 27 (max.)under consideration | 16.5 max.,1800 | 12 max.1800 |
| 4. | Interfacial Tension | N/m | 0.04 min. | ||
| 5 | Flash Point PMCC min. | °C | 140 | 130 | 135 |
| 6 | Pour Point | °C | -6 | <-30 | <-40 |
| 7 | Acidity | Mg/Koh/g | 0.03 | 0.03 | 0.01 |
| 8 | Corrosive Sulphur | Non corrosive | Non corrosive | Non corrosive | |
| 9 | Break Down VoltageAfter filtrations | Rms | 30 60 | 30 50 | 30 50 |
| 10 | Oxidation Stability:- Total AciditySludge | KoH/g.%by wgt. | 0.4 0.1 | 1.5 1.0 | 1.2 0.8 |
| 11 | Dielectric Dissipation Factor | 90°C | 0.002 | 0.005 | 0.005 |
| 12 | Specific Resistance At 90°C At 27°C
| ohm-cm | 35X1012 1500X101 | ||
| 13 | Aging Characteristic,Resistivity 90°C 27°C,DDF @90°C | Min. Min. Max | 2.5X1012 1500X1012 0.20 | ||
| 14 | Presence of oxidation inhibitor | Oil shall not contain anti oxidation inhibitor | Not detectable | Not detectable | |
| 15 | PCA Contents | Max | 3% | ||
| 16 | PCB Contents | Not detectable | |||
| 17 | Furfural Contents | Max.mg.kg | 0.1 | ||
| 18 | Water Contents | Max.,ppm | 50 | 30 |



