At DEMIKS, we develop and produce oil-immersed transformers with unparalleled performance, long lasting service, and high reliability. Optimized for various industrial applications, these transformers have high efficacy and strong robustness.
Familiarize yourself with oil-immersed transformers which offer high efficiency, sophisticated cooling methods, and long-lasting durability.
Increased operational efficiency with multi-stepped sections of high-permeability, grain-oriented silicon steel.
Includes optional gas relays, temperature systems, and pressurized gas relief valves.
Especially useful in preventing moisture and oxygen for enhanced insulation and sustenance of oil.
Oil passages that are corrugated as well as concentric coils and tap changers improve adaptability and operational performance.
Designed as corrugated, providing cooling and elasticity while being space-saving.
Protects from dust and other such environmental factors through durable spray and paint films.
| Rated Capacity (kVA) | Voltage Combination and Tap Range (H.V.) | High Voltage Tap Range (%) | Low Voltage (L.V.) | Junction Group Label | Load Loss (W) | Load Loss (W) | No-Load Current (%) | Short Circuit Impedance (%) |
|---|---|---|---|---|---|---|---|---|
| 30 | 6, 6.3, 6.6, 10.5, 11 | ±5, ±2×2.5% | 0.4 | Dyn11, Yzn11, YynO | 80 | 630/600 | 1.8 | 4 |
| 50 | 100 | 910/870 | 1.6 | 4 | ||||
| 63 | 110 | 1090/1040 | 1.6 | 4 | ||||
| 80 | 130 | 1310/1250 | 1.5 | 4 | ||||
| 100 | 150 | 1580/1500 | 1.4 | 4 | ||||
| 125 | 170 | 1890/1800 | 1.4 | 4 | ||||
| 160 | 200 | 2310/2200 | 1.3 | 4 | ||||
| 200 | 240 | 2730/2600 | 1.2 | 4 | ||||
| 250 | 290 | 3200/3050 | 1.2 | 4 | ||||
| 315 | 340 | 3830/3650 | 1.1 | 4 | ||||
| 400 | 410 | 4520/4300 | 1.1 | 4 | ||||
| 500 | 480 | 5410/5150 | 1 | 4 | ||||
| 630 | 570 | 6200 | 0.9 | 4.5 | ||||
| 800 | 700 | 7500 | 0.8 | 4.5 | ||||
| 1000 | 830 | 10300 | 0.8 | 4.5 | ||||
| 1250 | 970 | 12000 | 0.7 | 4.5 | ||||
| 1600 | 1170 | 14500 | 0.6 | 4.5 |
Our clients are more than happy to share testimonies about DEMIKS oil-immersed transformers:
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We can be contacted directly or through our Request a Quote form for specification based discussions. Outfit your substations with enduring transformer technology today. With DEMIKS, your industrial power systems will truly stand the test of time.
A: An oil-immersed transformer is a type of transformer which utilizes oil for both insulation purposes and as a coolant. Such construction improves both electrical insulation and dissipation of heat generated during operation.
A: Oil is considered as one of the best insulating materials because of its high dielectric strength, thus reducing chances of arcing. Moreover, it cools the unit effectively and thermally stresses the insulated components of the transformer.
A: Compared to dry transformers, oil filled transformers have a greater overload capacity and require better cooling for greater power demands, making them more efficient. Also, they have better electrical insulation and a longer operational life.
A: The cooling system for oil-immersed transformers is based on the circulation of mineral oil, which surrounds the windings and iron core of the transformer, absorbs heat, and dissipates it optimally, thereby maintaining efficiency.
A: From an oversight perspective, routine care necessitates temperature monitoring, detecting leaks, and analyzing oil samples for potential contaminants. Such measures bolster reliability and performance during sustained operations over time.
A: Oil-immersed transformers mainly utilize mineral oil. From an eco perspective, vegetable oil can also be employed, serving as a more ‘green’ substitute. Both are effective in cooling and provide adequate insulating properties.
A: An oil filled transformer’s rated capacity is generally inscribed on a nameplate affixed to the device. The equipamento’s classe is defined on it alongside the maximum output voltage and permissible power loss at standard conditions.
A: Hazards include oil components such as leaks and spills, posing risks to the immediate ecosystem. Temperature elevation of oil above safe thresholds is another risk and can lead to overheating, resulting in transformer damage and/or failure.
A: Although less common, oil-immersed transformers can be utilized for lower voltages. These transformers are preferred in higher voltage applications because of their superior cooling and insulation benefits when compared to dry-type transformers.
