SPAM 150 C Motor Protection Relay User Manual

This document is a user manual and technical description for the SPAM 150 C, a microprocessor-based multifunction relay designed for complete protection of AC motors, including thermal overload, phase unbalance, earth-fault, and undercurrent protection. It details the relay's characteristics, connection diagrams, technical data, and operational features such as self-supervision, serial communication, and programmable output relay matrix.