TO INCREASE END-OF-LIFE EXPECTANCY OF THE UNIT AND MAXIMIZE CAPACITY AND TO HANDLE OVERLOAD UP TO 40%.
poor cooling mechanisms, and overloading.
1. By using transformer oils.2. By nitrogen or sulfur hexaflouride gases.3. By using flourinated hydrocarbons4. Case is wide corrugated5. Case is provided with radiators
Each letter in KNAN transformer cooling stands for something different. K indicates a beyond 300-degree Celsius flash point, N denotes natural, and A is equal to air.
Radiators are used in a transformer to cool the transformer oil through natural air or forced air flowing in these radiator fins. As the transformer oil temperature goes down due to cooling it goes to the transformer tank from bottom ,cool the windings and gets heated, and then returns to the radiator for next cooling .This cycle repeats as the oil flow is also natural due difference in temperature of oil on bottom and top. In big power transformers this oil circulation is forced by oil pumps for effective cooling. The radiator has many small fins and there are 4-10 radiator banks in a transformer depending on capacity and make of the transformer.
Oil or similar is used as a cooling fluid in electrical transformer, because it is electrically insulating - which water is not. The figure of merit is the lack of conductivity.
nope
No not really only some do :DAnswerFor transformers used in transmission and distribution systems, yes. Transformer oil is necessary for cooling and insulation purposes, enabling the 'footprint' of an oil-filled transformer to be smaller, and its rating to be higher, compared with those not filled with oil.
Heat is one of the leading causes of transformer failure. The main source of heat generation in transformers are caused by copper loss in the windings and core (I²R losses). If this heat is not properly dissipated, the temperature of the transformer will rise continually which may cause damage to the insulation. A transformer operating at just 10°C above its rating will reduce its life by 50% so it is imperative to understand how transformers are cooled and how to detect problems in their cooling systems. ANSI and IEEE require the cooling class of each transformer to appear on its nameplate. The cooling classification of a transformer, expressed in letters, designate the type cooling system used. Transformers may have multiple load ratings that correspond to multiple stages of cooling.
Mineral oil
poor cooling mechanisms, and overloading.
Oil Directed Air Forced , it's speical way to cooling transformers through predetermined pathes in transformer windings . this way provids fester rate of heat transfer .
1. By using transformer oils.2. By nitrogen or sulfur hexaflouride gases.3. By using flourinated hydrocarbons4. Case is wide corrugated5. Case is provided with radiators
a transformer can be cooled by using forced air-essencially attaching fans to help pull heat away.
Each letter in KNAN transformer cooling stands for something different. K indicates a beyond 300-degree Celsius flash point, N denotes natural, and A is equal to air.
Transformer oil is a much better electrical insulator than air. So, in large transformers, oil is used to reduce the flashover distances between live internal parts, thus reducing the overall bulk of the transformer. At the same time, oil helps cool the transformer either by natural convection, or by forced circulation.'Dry transformers' are transformer that do not use oil for insulation or cooling purposes. They tend to be transformers with lower voltage and power ratings, where flashover and cooling is far less relevant.
A transformer is an electrical device that takes electricity of one voltage and changes it into another voltage.
Radiators are used in a transformer to cool the transformer oil through natural air or forced air flowing in these radiator fins. As the transformer oil temperature goes down due to cooling it goes to the transformer tank from bottom ,cool the windings and gets heated, and then returns to the radiator for next cooling .This cycle repeats as the oil flow is also natural due difference in temperature of oil on bottom and top. In big power transformers this oil circulation is forced by oil pumps for effective cooling. The radiator has many small fins and there are 4-10 radiator banks in a transformer depending on capacity and make of the transformer.