A complete Electrical Engineering portal
As we know, in a parallel circuit current divides into all branches. The current flow through each branch is inversely proportional to the resistance offered by each one them. The branch having higher resistance allows lesser current and the branch having lesser resistance allows more current. Current division rule is applied while finding current flow … Read more
Norton’s theorem is used to simplify complex linear circuits and making circuit analysis easy and fast. This theorem was proposed by E. L. Norton, an American engineer at Bell Laboratories. He came up with a new approach to simplify complex circuits containing several voltage sources, current sources and resistors with two terminals. Norton’s theorem is … Read more
Circuits can contain many power sources and power dissipation elements. It is common that any one of the elements in the circuit is a variable while all others are fixed. Thevenin’s theorem is applied in order to simplify complex circuits with a single varying load. Confused? Let us discuss a very common example: Imagine the … Read more
Relays are electrically operated switching devices, used to gain control over processes and circuits. Based on their principle of operation they are classified into two types: Solid-state relays and electromechanical relays. In this article let us discuss each one of them, their differences and similarities. Comparison of electromechanical and solid-state relays Electromechanical relays Solid-state relays … Read more
Earth fault is an undesirable condition at which current flow from a conductor to earth. This can happen when a current-carrying conductor falls on the ground or the body of any equipment or when someone touches a live conductor with adequate PPE or due to insulation failures. Earth leakage relay and earth fault relays are … Read more
Definition of arc chute Arc chute is a set of metal plates that are arranged in parallel and mutually insulated from each other, which can divide, cool and safely extinguish an electric arc. They are also known as arc splitters and arc dividers. Arc chutes can be found inside circuit breakers, contactors, isolators and other … Read more
A relay is an electrically controlled switching device. It consists of an electromagnet and a set of contacts that open or close when voltage is applied to the electromagnet. It was invented by the U.S. scientist Joseph Henry. In the beginning, electromechanical relays were used to transfer the Morse-code signal to long-distance through a wire. … Read more
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
