Different types of electrical switches pdf

The sockets have insulated base with moulded base having three terminal sleeves. The two terminal sleeves having same cross-section are used to connect phase and neural wire where as the third having greater cross-section is used to connect with earth wire. These are made for 5 amps and 15 amps load.

Two-pin sockets are also available, in which only phase and neutral wires are connected. These are available in 5-amp capacity. Plug The plugs are also having moulded three pins of brass or any electrically conducting material. These are also made of 5 amp and amp rating. These are used for taking power from socket. In these switches, either two numbers of fuse links are provided or a fuse link and a neutral link is provided.

The neutral wire is directly connected with the neutral link and phase wire is connected with the fuse link. Normally 15 Amp current rating main switches are made of plastic moulding instead of iron.

Generally these switches are also known as 3 phase 4 wires main switches. In these switches, three fuses and a neutral link is available. The neutral wire is directly connected with the neutral link and phase wires are connected with these fuse links. Fuse It is the most common and important type of safety device used for domestic and commercial installations.

These fuses are of kit-Kat type and are also known as cut-out. These cut-outs are made of porcelain in current rating of 15 to amperes. The material used as a fuse wire is tin, lead, silver, antimony, copper and aluminium etc. Copper or lead, tin alloy is mostly used in ordinary fuse wire. Miniature Circuit Breaker M. A miniature circuit breaker is an electro-mechanical safety device which operate and disconnect the circuit supply, when the current drawn from the circuit increases to a pre-determined value.

An MCB will normally operates at 1. It can be reset, by simply lifting its operational knob, where as the fuse has to replace its fuse wire.

Hence the miniature circuit breaker are replacing the rewirable fuses now a days. Search for:. In essence, double pole switches are like two separate single pole switches which can be operated from the same button. Although easy to use, these switches require expert electricians for proper installation.

Bell Push Switches: These are essentially single pole switches with a spring mechanism. Bell switches allow a short burst of electric current when pushed and then revert to the off position, hence breaking the circuit. These switches are usually used for operating doorbells in homes and office, but also find use in certain industrial installations for quickly checking power status.

Two-pin sockets: These electrical sockets feature two long connection slots, providing an ungrounded connection.

Three-pin sockets: This type of electrical socket adds a ground pin to help prevent electric shock from loose wiring. Universal or International sockets: These modular socket designs have pinholes that can accommodate a diverse range of plugs used in American and European countries.

Read Also - Smart Solutions by Schneider Electric for Working from Home during the Pandemic Electrical Modules These modules serve specific purposes for lighting and cooling solutions in home and office.

Dimmers: Relatively new in use, dimmers allow you to increase or decrease the brightness levels of indoor lights, mood lighting etc. The most common types of fan regulators offer 4-step or 5-step speed controls. Power Units : Basically, a combination of switch and socket in a single module, these units are used for supplying power to heavy-duty appliances. However, after the onset of modular switches and sockets, these units are seeing less use in modern home and office spaces.

Telephone Socket: Technically referred to as the RJ11 Jack, the telephone socket enables wiring of telecommunications along with your electrical wires. Data Socket: Finding more common use with Broadband and High-speed internet becoming mainstream, data sockets allow networking throughout your home or office, enabling LAN features. The socket is commonly known as RJ45 Jack.

The closed permits for the system to be switched at all times, whereas open permits for extra piece to be switched ON or triggered through the relay. From the following circuit, A, B and C connections from one pole of the switch and D, E and F connections from the other pole of the switch. Connections B and E are mutual in each of the poles. In the middle position, the power supply is not linked to the motor and it does not rotate. This kind of switch is mainly used in several motor controllers where speed of that motor is to be inverted.

The main objective of this project is to design a touch controlled load switch. This project uses a timer in monostable mode to drive a relay to turn ON a load for a fixed time duration. The timer IC is activated by a touch plate attached to its trigger pin. The output of delivers high for a fixed time interval as decided by the RC time constant connected to the timer.

This output drives a relay which in turn switches ON the load for that duration after which is turned OFF automatically. Human body induced mains supply advances a voltage on the touch plate to activate the timer. This circuit generates a musical tone when somebody touches the touch panel in the circuit, This circuit uses two AA cells and produces plenty sound.

The proposed circuit uses an IC UM which is used in musical circuits. This integrated circuit includes a ROM with musical tones, tone generator, ROM with musical notes, rhythm generator, runoff control, modulator, oscillators, pre-amplifiers and frequency divider.

To design this circuit a few of the basic components are required.