23/07/2020
🔻Ⓢⓘⓜⓟⓛⓔ ⓒⓘⓡⓒⓤⓘⓣ ⓦⓘⓣⓗ 4 ⓟⓘⓝ ⓡⓔⓛⓐⓨ👇
🔹4 pin relays use 2 pins (85 & 86) to control the coil and 2 pins (30 & 87) which switch power on a single circuit. There are 2 types of 4 pin relay available; normally open or normally closed. ... A normally closed relay will switch power OFF for a circuit when the coil is activated.
■ Working Principle of Relay
● It works on the principle of an electromagnetic attraction. When the circuit of the relay senses the fault current, it energises the electromagnetic field which produces the temporary magnetic field. This magnetic field moves the relay armature for opening or closing the connections.
🙋Why 4 Pin relay is used?
🔘Relays are used to control high voltage circuits with the help of low voltage signals. Similarly they are used to control high current circuits with the help of low current signals. They are also used as protective relays. By this function all the faults during transmission and reception can be detected and isolated.
😊What are the Advantages of 4 Pin relays?
🔸The advantage of relays is that it takes a relatively small amount of power to operate the relay coil, but the relay itself can be used to control motors, heaters, lamps or AC circuits which themselves can draw a lot more electrical power.
🔻What is a Relay and How Does it Work?
☆ A relay is an electrically operated switch. They commonly use an electromagnet (coil) to operate their internal mechanical switching mechanism (contacts). When a relay contact is open, this will switch power ON for a circuit when the coil is activated.
🚩Why use relay
◾Relays allow a low current circuit to control one or more higher current circuits. Relays provide these benefits; 1. Thinner cables can be used to connect the control switch to the relay thereby saving weight, space and cost. 2. Relays allow power to be routed to a device over the shortest distance, thereby reducing voltage loss. 3. Heavy gauge cable only needs to be used to connect a power source (via the relay) to the device.
🎯Why use a Relay in a Car?
💢There are several benefits of using a relay in a car. Firstly using a relay means the switching circuit does not require a high current rated switch or cable which reduces cost and weight. Secondly, relays can be positioned anywhere in the vehicle to provide efficient power transfer to the electrical accessory you are controlling. Relays are perfect for controlling many circuits in a car like headlights, electric motors, heater etc.
