Solid State Relays: A Comprehensive Guide

Solid State Relays or SSR are power switching solutions that are often used to lower the power load and ease the power without the manual function. With the help of a semiconductor, the relay switches can be turned on and off when the small external voltage is applied in its control terminals. These aren’t relays, but rather electronic circuits that can be used to control electrical loads. Unlike electric relays, they do not have moving parts and remain in a solid-state. 

Solid State Relays consist of a sensor, an electronic switching device along a coupling mechanism. They are shock and vibration resistant, hence, can perform at their best even in a hostile environment. They offer isolation between input and output terminals. This means that if a large voltage attacks the load terminal, the control device will continue to remain unaffected.

SSRs have a fast switching speed as compared to electromechanical relays and have no physical contact to wear out. There are different types of SSRs like zero-switching, instant-on, peak switching, etc.

Advantages of Choosing Solid State Relays::

Lifespan

A solid-state relay will outlast EMR by many, many years. To benefit from its infinite lifespan, SSR needs to be well maintained and used properly.

Silent, Compact and Powerful

Being small and compact, they do not have large electromagnets attached to them. Moreover, without moving parts, SSR switches are completely silent electric devices.

Fast and Energy Saving

Since relays do not have to energize a coil and physically open and close contacts, they  consume 75% less power than other electric relays.  Their average is between 0.5-1ms

Being so innovative and useful, SSR’s are used under the following conditions:

• Applications at high vibration environments.

• Applications where the relay has to be located near sensitive automation components.

• Application in dusty and humid environments.

• Application in a hazardous location.

• The application requires high speed and frequent switching locations.

Solid State Relays are highly in demand for such applications. In this modern & innovative era, #SchneiderElectricIndia has covered a huge market demand and proved to be reliable and safe to operate. They provide a wide range of withdrawable protection relays like Easergy P5, Easergy P3, MiCOM P12x. They facilitate relentless protection and stability which is a must at the top level-be it motor or over current to complex distance protection.

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Erric Ravi Erric Ravi is an entrepreneur & the founder of SEOexpertnow Joined: May 30th, 2018