Tuesday, 17 September 2013

Different Aspects Of Distribution Transformer And Power Transformer

The consumption of electricity has augmented manifold in one's daily life. Most  of the household appliances these days work on electricity. It meets every needs and is used while cooking, heating, cooling, light, sound, refrigeration, entertainment and computation. Electricity has in fact become a basic necessity. One cannot imagine life without electricity these days. But often one faces power troubles due to voltage fluctuations. Many a times home appliances break down due to the voltage problem making it  difficult to run the devices safely and efficiently. The way out to solve such problems is through a transformer. A transformer is the right solution to rectify voltage fluctuations.

Importance of distribution transformer and power transformer in their own respective
Distribution transformers in India are a vital equipment that enables the release of electricity with high degrees of capillarity. Owing to this, each of the conductors of the distribution networks becomes a mode of passing into the transformer voltage surges, particularly those that are yielded by lightning. It is used in every sector of the economy from commercial, industrial to residential. A distribution transformer is categorized on the basis of the type of insulation, voltage level and number of phases.

Power transformers are one of the most common transformer types utilized for converting main voltage into low voltage and/or vice versa resting on the need. This type of transformer is also known as step-up or a step-down transformer depending on its functionality. Its chief functionality is making use of electricity devoid of the risk of devastating the internal circuitry of any device due to high voltage flow. The term power transformer itself explains the very reason of the equipment for use of both power distribution as well as management. A power transformer is utilized for transmitting power from higher voltages to lower voltages.

(For More Resource :- How To Make Modern Approach To Resolve Issues Of Transformers Oil Filtration

Different aspects of power transformer and distribution transformer

  • Distribution transformer is utilized for distributing electrical energy at a low voltage lesser than 33KV for industrial purposes and 440-220v for domestic purposes. The power transformer is utilized for transmission purposes at heavy load, higher voltage above 33KV and with 100% efficiency.
  • Distribution transformers are designed for utmost efficiency at 60-70% load and does not normally operate at full load every time. The load of a distribution transformer rests on distribution demand. On  the other hand, power transformers are designed for utmost effectiveness at 100% load. This type of transformer always works at 100% load owing to the fact that it is adjacent to generating stations.
  • Distribution transformer is a part of the distribution system whereas a power transformer is an integral part of the transmission system.
  • Distribution transformers are always online hence operated at a load lesser than full load mostly. As a result, it is created in such as way that the core loss is minimal. While a power transformer typically is operated at a full load. Owing to this, it is designed in such a way that the copper loss is minimal. The flux density in a power transformer is higher compared to a distribution transformer.

Although, these two transformers share differences but they have their own individual importance. Both  play a vital part to keep voltage fluctuations at bay.

About the Author :
Through this content, Reeyankee Das Choudhury has highlighted on the differences between Distribution Transformers and Power Transformers as well the role of both in fighting voltage fluctuations in their respective ways.

Monday, 16 September 2013

Better Transformer Output With On Load Tap Changer Mechanism

Transformers with time have progressed into an era where their importance cannot be ignored at any instance. New processes and equipments are in use by the various industries in diverse domains. Technology has proven to be a boon for such equipment which has transformed the outlook of the electrical industry. These are expensive and vital components of the power systems. New ways and mechanism are in place to avoid any damage to the different equipments in use and to provide equal and stable distribution of power in an effective and efficient way.

Role of tap changer :

The role of a tap changer used in transformers is being highly recognized in industries around the world. This type of device is designed to support the power transformer exporters in India which regulate the final output voltage to the desired intensity. The requirements vary from one source to the other which is why this is being enforced to ideally alter the number of turns in the winding so as to meet the demands. With on load tap changer the supply voltage is controlled within the limits in a variable manner. This specialization is nowadays being accepted and appreciated by almost all to maintain the voltage regulation.

Basic Types :

On the basis of operation, the tap changers are distinguished as:
  • On load tap changers are types which come into effect when the transformers are on load. This requires a make before break technique where these are motor driven and has the option to be used automatically or manually.
  • Off load tap changers are devices utilized in cases where the transformers are kept disconnected and does not require a make-before-break system.

With on load tap changer the potential of the transformers has experienced a new development. This has minimized the requirement for maintenance of the power equipments and created an environmental friendly platform. Such a technique offers solutions in the form of:
  •     Power flow regulation
  •     Regulation of voltage for high power transformers
  •     Protection of transformer failures
  •     Power grid analysis
(For More Resource :- The Potential Aspect Of Power Transformer And Distribution Transformers In India)
Prominent Features
  •     Minimal noise
  •     Offers standard electrostatic shield
  •     Standard neutral
  •     Effective coupling capacitance
  •     Impedance prevents short circuits of the tapped portion
  •     Unsurpassed simplicity
  •     Convenient accessibility
  •     Low failure rates
  •     Cost effective

On load tap changer operation

In a normal scenario the voltage of a transformer may not match the exact voltage requirement of a system. In such cases the use of on load tap changer comes into the picture wherein this technique assists in raising or lowering the output voltage to the desired load. The operation is based on the switching principle where the number of windings is added or removed accordingly to attain the desired output. This can be fixed in any one location of the entire transmission line which depends on the winding type. The possibilities are:
  •     At the star point
  •     Middle of the winding
  •     End of the winding
The consideration is checked on the basis of the stress factor. In most cases the arrangement is done in the middle or at the end to provide least electrical stress. Thus with on load tap changers the tapping on different energized transformer windings are adjusted without the need of any specialized tools.

The tap changers have become an indispensable component in today's electrical networks and industrial applications in a large scale.

About the author :
Reeyankee Das Choudhury's content on transformers have shown their importance wherein with on load tap changers the system becomes more efficient and highly performance oriented.