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SPCJ 4D24 Combined Overcurrent and Earth-Fault Relay Module User Manual

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This document is a user’s manual and technical description for the SPCJ 4D24 combined overcurrent and earth-fault relay module, detailing its features, settings, and operation. It covers low-set and high-set overcurrent stages, neutral overcurrent stages, inverse time characteristics, front panel controls, programming switches, and self-supervision functions.

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