Tuesday, 16 July 2013

How to choose right Transformer for industry?

dry-type transformers, the area in which the transformer is to be installed should have proper ventilation. This ventilation should be checked prior to installation to make sure it is adequate. Additionally, the transformer's radiator vents should be kept clear of obstructions that could impede heat dissipation.

Dry type transformer is one of the well-known types of this transformer. It is repeatedly established in industrial applications. Most of the businesses or industries are making use of this type for their varieties of purposes. There are a lot of benefits available by using this type and some of them are as follows:


The most important benefit of this dry type is that they will be able to install easily and very near to the load which eradicate operations of expensive cables and that making this type of transformer extremely cost-effective.
There are some other areas where industry can save the cost by making use of this dry type transformer and that consist of low preservation and less working costs.

This dry type is a reasonable selection in favor of a Medium Voltage that will never give up trustworthiness and superiority.

Thursday, 11 July 2013

Importance and uses of Power Transformers?

Transformer is an electrical machine so as to transfer power commencing one circuit to a different by transformer attractive combination through no affecting parts. Transformer comprise of two or supplementary attached windings otherwise a single tap windy and, in most cases, Transformer a magnet, the category of the magnet cover all method of strategy intended to create, conduct, straight, exchange otherwise defend the abuser from electrical liberation.

Most important produce families contained by electrical and electronic mechanism consist of batteries, connectors, inactive electronic mechanism, electrical allocation and defense gear fuse, supremacy supplies and conditioners, relay and timers, switches, rush forward suppressors, and wires and lead. Batteries are strategy that exchange power into electrical current Batteries is worn in a broad range of engineering application to power electronic strategy.

In attendance there are two main sequence types - chemical and physical Battery related trimmings and mechanism such as chargers, racks and cabinet are also enclosed in this segment Connectors consist of all method of plug, socket, cap, strips and conductors considered to connect and demeanor electrical energy throughout cords, wires, and appliance, over and above, whole electrical allocation system.

Electricity or power has become the major part of our daily life and without electricity we cannot imagine a life today. Most of our household appliances work on electric current. We face various power problems due to voltage fluctuations. Sometimes our home appliances malfunction due to voltage problems. The solution for all these problems can be rectified only through a transformer. Power transformers or a transformer is an electrical device that is used to change an alternating current voltage from one electric circuit to another through electromagnetic induction. These transformers are employed in various mechanisms to reduce the incoming voltage or increasing the voltage of electrical equipments. These transformers have two or more windings wounded on a laminated iron core and the number of windings is based on the requirement of electric voltage that the transformer is used to supply.

There are many types of transformers like isolation transformer, power transformers, electrical transformer, audio transformer, current transformer, high voltage and low voltage transformers, step-up and step-down transformers etc. Each of these kinds has their own properties and usages in transferring voltage based on the appliance it is attached with.

Electric transformer is a device that is employed in increasing or lowering the voltage of alternating current or voltage. Electric transformers have two sets of coils called primary and secondary coils linked around magnetic fields that work as conductors. This number of windings determines the workability of the transformer. There are various forms of electrical transformers like step up transformers to raise voltage or step-down transformer to lower voltage levels that can be used in power lines or household appliances to regulate current supply and reduce electricity bill costs.

These machines are used in various ways to increase or decrease the electrical flow in circuit boards. There are different types of these machines culminating distinctively different usage. A few of popular transformers are isolators, power, electrical, audio, current, high voltage and low voltage, step-up and step-down transformers etc.

There are various tips that we have to consider in selecting the best transformer from the most excellent companies to enjoy trouble free and secured electrical services. The greater protection of these power transformers can be confirmed if they own the TVSS surge protection. The surge protectors are devices that guarantee safety of electrical appliances from voltage spikes by regulating the current that is supplied to the appliance. The voltage is maintained either by obstructing or reducing the ground voltages to a safer measure. Most of the power transformers that are available today have built-in surge protection to offer high quality devices to the customers.

Tuesday, 9 July 2013

Overview of the Furnace Transformer

The most widespread function of transformers is actually in the transportation of electricity from power plants to the several positions in which the voltage is noticeably paced down to the functional levels. The electric furnace transformers keep a complete balance in the electricity distribution in circuits, machines and other sources involving power for its operation. The furnace transformer is generally made to alleviate the voltage fluctuation ensuing in breaking down of the electrical equipment's.

The main purpose of transformer is to alter the voltage with the assist of shared electromagnetic introduction. The electrical current is produced to run all the way through the main coil/circuit that is once more used to make a magnetic field. As such, transformers function as energy converters which put the power from higher to lower voltage.

Electric  Furnace Transformers are needed for various furnace methods and applications too. They are mainly made for the ladle furnace, steel furnace and ferro-alloy furnace. They are just comparable to short or inundated  Furnace Transformers. These transformers are working under every rigorous condition relating to numerous over currents and over voltages that are prepared through short circuits in the furnace. EAF is renowned as a standard furnace that is utilized for steel production. Additionally, it is also applicable for the steel re-melting.

Actually, there are two kinds of arc furnaces that include direct furnaces and the indirect furnaces. Direct arc furnaces are having three electrodes which are mostly utilized to heat metal by means of arc and then it ultimately produces an implausible amount of heat and the water coverings all along with further cooling devices are also needed for operation. While, the indirect one is having one electrode and it functions just like the direct furnace does.

The recent developments have greatly influenced the use of furnaces, thus bringing in an increasing demand for electric furnaces. Wood and coal is eventually a scarce commodity now. And thus the idea is to use an abundantly available fuel for furnace. The electric furnace doesn't need any fuel to work and hence considered the best. It is a device that basically converts electrical energy supplied to it to heat energy. And this conversion from electrical to heat is carried out with the help of heating coils. The coils produce a high temperature when electricity is passed through them.

An electric Heater can be of various types and uses electric power to produce heat. It includes a central heating plant for a home or building, an electric arc furnace used for steel-making and smelting of certain ores, an industrial heat treating furnace, an electrically heated kiln, an induction furnace used for preparation of special alloys and a modern muffle furnace. An electric furnace is a three piece metal band that fuses classic metal and heavy rock with a modern edge. It has few exciting features that put it above the gas or propane furnaces. However there are also certain disadvantages. It is very different from the various alternatives available but it will prove to be quite expensive to use on a yearly basis. Especially during winter season as electricity tends to get expensive then.

Adhesive curing, paint drying, brazing, soldering, melting, iron casting, foundries are some of the areas of application. These furnaces are designed to suit variety of application. Available in different sizes and capacities, these furnaces have unique features, like very high chemical durability, high refractory properties, low alloy losses and evolve premium metal quality free of impurities.

However, the induction process usage in foundry lack refining capacity and materials charged must be free of oxidation products. This will result in loss of alloy elements due to oxidation and must be added again to the molten material. The frequency of induction furnace is dependent on the melted material and the speed as high frequency furnace is faster in melting the charge as against the lower frequency furnace generates more turbulence in molten stage. Strangely, there will be humming, the pitch of which is an indication to identify the operating power level of the induction furnace alerting the operator.

The application of induction furnace in steel industry is phenomenal. Both high and medium frequencies are popular in steel making. Mild steel, Stainless steel, Alloy steel of many grades are some of the types that are usually manufactured by Induction Melting Furnace in steel industry. Other applications are melting scrap, direct reduction of iron, alloy making etc




Friday, 5 July 2013

Importance of Power Transformers?

Electricity or power has become the major part of our daily life and without electricity we cannot imagine a life today. Most of our household appliances work on electric current. We face various power problems due to voltage fluctuations. Sometimes our home appliances malfunction due to voltage problems. The solution for all these problems can be rectified only through a transformer. Power transformers or a transformer is an electrical device that is used to change an alternating current voltage from one electric circuit to another through electromagnetic induction. These transformers are employed in various mechanisms to reduce the incoming voltage or increasing the voltage of electrical equipment's. These transformers have two or more wingdings wounded on a laminated iron core and the number of winding's is based on the requirement of electric voltage that the transformer is used to supply.

There are many types of transformers like isolation transformer, power transformers, electrical transformer, audio transformer, current transformer, high voltage and low voltage transformers, step-up and step-down transformers etc. Each of these kinds has their own properties and usages in transferring voltage based on the appliance it is attached with.

Electric transformer is a device that is employed in increasing or lowering the voltage of alternating current or voltage. Electric transformers have two sets of coils called primary and secondary coils linked around magnetic fields that work as conductors. This number of winding determines the work ability of the transformer. There are various forms of electrical transformers like step up transformers to raise voltage or step-down transformer to lower voltage levels that can be used in power lines or household appliances to regulate current supply and reduce electricity bill costs.

Wednesday, 3 July 2013

Benefits of Distribution Transformers

The Distribution Transformers main concern is for heating caused by loading. Radiators are added to the transformer to help the insulating fluid control the steady state temperature rise, but these do not help during fault conditions. Heat generated during a fault happens in such a short period of time (usually seconds) that the calculation assumes "all heat is stored" in the conductor because heat dissipation does not occur fast enough to combat the rapidly heating conductors. The GT takes this into account and is designed such that the conductor can handle the fault heating without relying on insulating oil for heat transfer during the fault.

Many GT specifications recognize this and allow the steady state cooling to be calculated using the magnetizing current and HV I2R loss resulting from energizing the core only. This leads to some misconception that the DT is better cooled, but the opposite is during faults.

Another subtle difference is the way the two devices "see" faults. The DT typically sees a line to ground fault or maybe, a line to line fault, but since the GT is providing a return path to the network, it typically sees a zero sequence fault which impresses the fault current equally on all three legs simultaneously. To combat the forces generated, GT conductors are always copper for maximum strength to cross section ratio, and because copper has a higher thermal withstand capability. GT coils are always circular on cruciform cores to gain the maximum form stability. Distribution transformers often utilize rectangular coil construction which does not have the same form stability offered by the circular coil technology.


Transformers under load generate heat due to winding (copper) and core losses occurring during operation. There is an 'acceptable' temperature rise for transformers used in power applications, and this can even limit their size. This acceptable temperature rise is directly related to the limitations of the transformer materials; safety regulations; or component parts in close proximity that may have high-temperature reliability problems.