ABB SPCJ 4D34 Motor Protection Relay

ABB SPCJ 4D34 is a digital motor protection relay module designed for use with ABB's SPAM 150 C motor protection system. The module functions as the protection logic component within the SPAM 150 C assembly, enabling motor protection and monitoring through a dedicated SPCJ 4D34 hardware block. In ABB documentation, SPCJ 4D34 is described explicitly as the motor protection relay module type used in the SPAM 150 C family, delivering multi‑function protection for motors in industrial environments. The unit supports thermal overload protection and offers configurable starting current monitoring, with settings accessible through the SPAM/SPAC protection platform to tailor response to motor startup and running conditions. Typical applications include protection of medium‑ and low‑voltage motors such as pumps, fans, and conveyors in manufacturing plants, processing facilities, and other industrial facilities where reliable motor protection is required. The SPCJ 4D34 module is integrated into ABB’s SPAM 150 C protection architecture, contributing the protective logic while the SPAM 150 C unit provides the user interface, power, and coordination with contactors and other protection devices.