Testing of current transformer

Current transformers are generally used to measure currents of high magnitude. These transformers step down the current to be measured, so that it can be measured with a normal range ammeter. A Current transformer has only one or very few number of primary turns. The primary winding may be just a conductor or a bus…

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Maintenance of power transformer

Power Transformer Transformer is the heart of any power system. Hence preventive maintenance is always cost effective and time saving. Any failure to the transformer can extremely affect the whole functioning of the organization. Important components in power transformer to consider for preventive maintenance: The best way of protecting a transformer is to have good…

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Periodic inspection & diagnostics of transformer

Transformer is a static device, thus it requires less attention but with proper Periodic inspection & diagnostics of transformer it would be possible to avoid the unwanted break down & frequent interval of schedule maintenance. As transformer is the heart of power network, the maximum availability of it and also to meet the full life…

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What are the factors to be consider for Specifying Transformer

Generally there are many factors to be consider for Specifying Transformer but the most important factors for specifying transformer is listed below, Kilo volt ampere (kVA) Rating Voltage Ratings, Ratio, and Method of Connection (Delta or Wye) Voltage Taps Typical Impedance Values for Power Transformers Insulation Temperature Ratings Insulation Classes Sound Levels Effects of Transformer…

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Capacitor Voltage Transformer CVT

In high and extra high voltage transmission systems, capacitor voltage transformers (CVTs) are used to provide potential outputs to metering instruments and protective relays. In addition, when equipped with carrier accessories, CVTs can be used for power line carrier (PLCC) communication. The details of CVT is given below:- Capacitor stack The capacitor stack is a…

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Transformer Working Principle

A transformer is based on a very simple fact about electricity: electromagnetic induction. When an electric current flows through a wire, it generates a magnetic field or magnetic flux all around it.  A magnetic field may be considered as being the medium by which forces are transmitted between magnetized materials. In everyday life, magnetic fields…

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OC & SC Test of Transformer

  Transformer is static machine which pass the electrical energy from one place to another place without change the frequency. Generally Transformer having two types of test, Open circuit test Short circuit test Open circuit (OC) test The shunt branch parameters can be determined by performing this test. Since, the core loss and the magnetizing…

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Types of Transformer

Types of Transformer Transformers can be categorized in different ways, depending upon their purpose, use, construction etc. The types of transformer are as follows, Step Up Transformer and Step Down Transformer – Generally used for stepping up and down the voltage level of power in transmission and distribution power system network.                                                 2. Three…

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Distribution transformers analysis and maintenance practices

 Distribution transformers Distribution transformers are normally considered to be those transformers which provide the transformation from 11 kV and lower voltages down to the level of the final distribution network. In the UK this was, until January 1995, 415 V three-phase and 240 V phase to neutral. Prior to January 1995, most distribution transformers were designed…

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What Do Electrical Transformers Do?

What Do Electrical Transformers Do? You may think that electricity is pretty standard but its voltage and frequency varies between countries and regions in a single country. Essentially, electrical transformers are used to change the voltage of electricity so that it is suitable for different appliances and locations. WHERE ARE TRANSFORMERS USED? You might see…

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