History

The primary function of relay protection in power systems is to identify and isolate from the rest of the system any part of the system that is malfunctioning or running in an abnormal operating condition that might cause it to fail. The relay protection system, by definition, must be the most reliable and safest system in the entire plant, because its operation is expected only at certain points in time (breakdowns, abnormal conditions, etc.), and thus it must meet all the criteria of a relay protection system, especially given that the object of protection is a production capacity, and an adequate response of the electrical protection system can objectively have significant technical and financial losses

By performing this function, relay protection reduces the harm that results from a failure and helps to increase the reliability of the power system by isolating the failing component and allowing the remainder of the system to function normally.

The Laboratory for Relay Protection's main objective is to provide standards, guidelines, and recommendations as well as to build up testing procedures based on studies of the placement of electrical protections installed at power facilities. Relay protection devices are verified and certified by the Institute's recognized laboratory, which is the only one in Serbia.