Product Profile of Feeder Protection Relay - Spas 348 C
ABB manufactures and supplies Directional Earth Fault Relay and feeder protection relays. The SPAS 348 C, a feeder protection relay is used for application requiring directional phase over current, directional short-circuit and directional earth-fault protection of infeeders and busbars in distribution substations provided with multiple infeeders supplied via power transformers from the same high-voltage busbar system. Salient features are as follows:
1 The relays are also applied for the selective short-circuit and earth-fault protection of parallel multiple feeders between substations and for feeder protection in ring-type and meshed distribution networks.
2 The directional relays are used for the protection of radial feeders supplied with a small back-feed of energy from a generator in the consumer-end of the feeder.
