To succeed in the increasing complexities, caused by the deployment of renewable energy sources coupled with the acceptance of EVs all over the world, the funding in smart grids is increasing. For example, corporate investment for energy storage as well as smart grids for the January–September 2022 period reached approximately USD 25 billion, which increase of 66% from the previous year. 

Furthermore, the requirement for electric safety has been increasing with the growing electrical infrastructure. In addition, equipment damage or failures to substations, transmission lines, and various other parts of the electrical system can result in unintended outages. 

The placement of relays assists in avoiding damage to equipment, along with decreasing the period and risk of rapid outages. Additionally, the protection relay guarantees that the electric systems can be run with the highest safety, and damage to the total system can be avoided.

How Does Voltage Protection Relay Work?

Protective relay systems are a portion of an electric circuit. The relay system tracks the electricity flow voltage in case the voltage goes below or above a predetermined standard. If the voltage alters too much, the protection relay trips, turning off the system and avoiding damage to the equipment and safety topics.

Protective relay systems comprise two key components, a switch and a wire with an iron core. As voltage travels in the wire, it creates an electromagnetic field. If the voltage diverges from the established metrics, the relay wire will trip the system, shutting off the electricity. 

Basically, it transmits a message to the circuit breaker so that it will throw the circuit. After an established period, the relay will enable the current to continue, and the machine can return to normal procedures.

Voltage relays are generally more effective as compared to circuit breakers alone because a relay has higher sensitivity to power variations. While voltage protection relays mainly work with two-stage DC/ AC systems, there are also protection relays that work with three or single-phase setups. These voltage protection relays are intended to notice loopholes.

Get More Insights: Medium Voltage Protection Relay Market Revenue Estimation and Growth Forecast Report

The Key Objectives of Medium Voltage Protection Relays Include:

 •    To offer the operator an alarm signal under specific network or machine service conditions. For instance, defense against negative sequence for generators.

•    To put the line or defective machine out of commission within a short period.

•    To perform automatisms under specific service circumstances, for instance, undervoltage protections which initiate automatic reclosing or automatic changeover of the lines.

•    To control network parameters which avoid false operations.

•    To initiate recording of network parameters to memorize the network disturbances, for instance, the initial contacts of the overcurrent relay.

•    To protect the interface with the outside network.
 
Coming to a Close
 
With the increasing need for power supply, the advancement of smart grids, railway infrastructure electrification, and constant industrialization and urbanization the demand for medium voltage protection relays is rising. And, this demand is likely to reach a value of USD 2,971.4 million by the end of this decade.