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SPAJ 140 C Combined Overcurrent and Earth-Fault Relay User Manual

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This document is a user manual and technical description for the SPAJ 140 C combined overcurrent and earth-fault relay, detailing its features, application, operation, connections, and technical data. It covers three-phase overcurrent and earth-fault protection units with definite time or inverse definite minimum time (IDMT) characteristics, including high-set and low-set stages, breaker failure protection, and serial communication capabilities.

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