What is an Overcurrent Relay?

An. overcurrent. relay is an electrical protection device designed to cut off the. power supply. to a circuit, appliance, or machine in the event of an overload or failure. These devices typically consist of a manual. circuit breaker.

What is different between overcurrent relay and over load relay?
This a quote from Wikipedia: http://en.wikipediawiki/Relay. You have to scroll way down the page to see: "Overcurrent relay. An "Overcurrent Relay" is a type of protective relay which operates when the load current exceeds a preset val