Relays and contactors are electrical switching devices. This article helps you understand the difference between relays and contactors
Layout, Construction, working, Classification, types, pros and cons, disposal of nuclear wastes and safety in nuclear plants are explained clearly in this article.
Circuit breakers and fuses, in spite of performing a common task of protection, are entirely different from each other. The difference between them are clearly explained in this hub.
High rupturing capacity (HRC) fuses are totally enclosed fuses with definite known- high breaking capacity which have been developed after intensive research by manufacturers and supply engineers.
Rewirable fuse is also known as kitkat fuse, is a simple reusable fuse used in homes, offices and in the protection of outdoor distribution transformers. It is available in a wide range of ratings.
Electrical fuse is a simple, less resistive, self sacrificial and cheapest device used to interrupt a circuit under short circuit, excessive overload or over current conditions.
IC 79xx (7905, 7912, 7915, 7918) is a three pin negative voltage controller IC. It is a small integrated circuit used in a circuit to supply a constant negative input voltage.
Transformers are mainly classified into power transformers and instrument transformers. Transformers are also classified into auto-transformers, audio frequency , grounding and welding transformer.
IC 7805 (L78xx, LM78xx, MC78xx) is a voltage regulator IC belonging to 78xx family. Pin out configuration, Need for 7805 in a circuit and circuit diagram of voltage regulator are explained here.
Induction machine | Construction | Principle of operation | Induction generator
Synchronous machines | Construction | Principle of operation
Layout, parts and working of diesel engine explained clearly.
Various types o hydroelectric power plants are explained here.
Potential transformer is an instrument transformer used for metering and relaying. Construction, operation, types and error occurring in potential transformers are clearly explained in this article.
A current transformer is an instrument transformer, used along with measuring or protective devices, in which the secondary current is proportional to the primary current (under normal conditions of operation) and...
There are two methods of tap changing. 1. Off load tap changing 2. On load tap changing
the tests conducted on a transformer are 1. Open circuit (OCC) test 2. Short circuit (SCC) test 3. Sumner’s or Back to back test
Insulating materials are non metallic materials that do not allow electric current to pass through them at normal temperatures. Insulating materials used in Electrical Machines are illustrated here.
In transformers mainly three insulating materials are used. They are Transformer oil, Insulating paper, Press board.
Insulating materials used in electrical machinery are classified based on their material and temperature withstand capacity
This article gives clear idea about the losses occurring in the transformers.
Construction, working,advantages, limitations and applications of auto-transformer are explained clearly in this article
Learn about the Working and types of microphone
Buchholz relay is a type of protection relay universally used on all oil immersed transformers having rating more than 500 kVA. From this article its principle and working can be understood.
Equivalent circuit and Phasor diagram of transformers are derived explained clearly.
Transformers can be classified into various types. This article states about various types of transformers and how they differ from each other,
There are many methods used to cool the transformer. This article helps you to understand the various cooling methods followed in the transformer.
This article discusses the various components of a power transformer and briefly explains how they work.
A Diode is a two terminal electronic component which offer zero resistance in forward bias and infinite resistance in reverse bias. This article tells about various types of diodes.
Principle of operation of transformers can be easily understood from this article. Basic working principle of the transformer is mentioned very clearly and briefly
Easiest way to understand ohms law. Detailed view about ohm's law and its components- current, voltage and resistance. what is current? what is voltage? what is resistance and how it varies?