The Relay Trainer Set consists of four essential relays — Cut Out Relay, Reverse Current Relay, Over Current Relay, and Under Voltage Relay — designed to demonstrate the principles of electrical protection systems. It allows students to study relay operation, fault detection, and circuit protection in power systems. Suitable for engineering colleges, polytechnic institutes, and ITIs, this educational setup provides hands-on learning on calibration, tripping characteristics, and fault simulation. Built with robust components and clear labeling, it ensures safety, reliability, and repeatability in electrical laboratory experiments.