A complete Electrical Engineering portal
Power is transmitted over long distances at high voltage. In order to supply domestic and residential applications, it needs to be stepped down to 120V or 230V single phase. This conversion happens inside a transformer. If the secondary of this transformer is delta then, the centre of any one of the phases is centre-tapped and … Read more
Electrical engineers and electricians follow predefined wiring color codes while wiring houses, commercial buildings and industrial panel boards. It is mandatory to know the electrical wiring color codes before attempting any kind of repair works yourself. The electrical wiring color codes followed is slightly different in every part of the world depending on the standards … Read more
In every control circuits and automation systems, logic is developed based on the open or closed state of switches, sensors or relays. Hence it is mandatory to know the concept behind NO/NC. Normally open(NO) and Normally closed (NC) are terms used to define the states of switches, sensors or relay contacts under when its coil … Read more
kA rating of an MCB or an MCCB is the maximum current it can safely interrupt in case of a short circuit. If the current goes beyond this value, the circuit breaker could be damaged. kA rating is known as the short circuit withstand capacity or ultimate breaking capacity of a circuit breaker. For example, … Read more
MCB stands for miniature circuit breaker. It is a circuit protection device, capable of protecting a circuit or a piece of equipment from greater damages caused due to short circuits as well as overloads. It is a modular device and can be used as an alternative to fuses. It is capable of sensing overload and … Read more
Electricity is required for lighting up our homes and powering up industries. It can be constructive or destructive depending on how carefully it is handled. One of the most dangerous situations is when there is a short circuit. You may have heard of fired accidents caused due to short circuits or even deaths due to … Read more
Anyone who uses electricity and has heard of term: single-phase and three Phase, maybe trying to understand the difference between them. This article narrates the differences between a single-phase power supply and a three-phase power supply. What is meant by phase? Before getting into our topic, it is essential to understand the term phase. The … Read more
What is the purpose of transformer oil? Transformer oil functions as a coolant as well as insulating material. It also enables transformer protection during internal faults. It is chemically stable and has high thermal conductivity and dielectric strength. On the event of faults it decays rapidly and forms gases which operate Buchholz relay. What are … Read more
You might have noticed huge towers supporting the high voltage transmission lines in your locality. These high voltage lines transmit electric power generated at power stations which are situated at remote locations. Power stations are built away from the cities where natural resources are available and are transmitted to the load centres. Electricity is transmitted … Read more
How does a transformer work? A transformer is an electric machine that converts AC voltage from one level to another level with minimum power loss. It is based on the principle of electromagnetic induction. A typical power transformer consists of two sets of coils – Primary coil and secondary coil. The rate of voltage transformation … Read more
