Thursday, January 30, 2020

Double Pole Double Throw Relay Schematic Diagram

This post is about the double pole double throw relay schematic diagram. In this post, you will complete learning about the working of a double pole double throw relay, also known by the name of the DPDT relay. Basically, a double pole double throw relay is an electrometric relay which two common points, 2 normally close and 2 normally open points. Also 2 coil connection points.  The relay is used for many things, like controlling AC/DC loads, automatic switch, as changeover for generator or double electric supply, DC motor forward reverse, AC single phase motor forward reverse, and so on...



Double Pole Double Throw Relay Schematic

DPDT relay is available in different shapes and types according to rating coil voltage and contacts amperes. A 8 pin finder or glass type relay is also a type of dpdt relay. Here I showed a dpdt power relay with a diagram.


double pole double throw relay schematic


In the above double pole double throw relay schematic diagram. I have shown a power relay with a schematic diagram. Also a 8 pin glass finder types relay with also a dpdt relay with a diagram. In the diagram, A1 and A2 is coil terminals of the electromagnetic relay. The 1 terminal is common which is normally close with 2 and normally open with 3. The 4 is common and normally close with 5, normally open with 6. Here some more diagrams which helps you more...

Also read:

14 pin relay with wiring diagram
Staircase timer connection with relay

Note that DPDT Relay can be in different shapes and can be used for different controlling. The small type of double pole double throw relay mostly used for controlling other relays like magnetic contactors. (Also this relay can work as auxiliary contacts with magnetic contactor). And the big-size DPDT relay, also known as power relay is used a high load according to relay ratting. If the relay is 30 Ampere then we can easily control a single-phase load with is less than 30 ampere. However, we will further talk about this..... This post is only about the double pole double throw relay schematic diagram.

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