SPAS 348 C Feeder Protection Relay User Manual and Technical Description

This document is a user manual and technical description for the SPAS 348 C feeder protection relay, which provides directional phase overcurrent, directional short-circuit, and directional earth-fault protection for distribution substations, infeeders, busbars, and ring-type networks. It covers features, application, operation, connections, technical data, testing, and module-specific descriptions for directional overcurrent relay modules SPCS 4D11/4D12 and earth-fault relay module SPCS 2D26.