Product Overview

The ABB PR122P-LSIG E1-E6 (Part Number 1SDA058198R1) is a high-performance electronic trip unit designed for the SACE Emax series of low-voltage air circuit breakers. As the intelligent protection core of Emax breakers, the PR122P-LSIG E1-E6 delivers comprehensive overcurrent protection with L (overload), S (selective short-circuit), I (instantaneous short-circuit), and G (ground fault) functions. This unit serves as the primary protection interface for industrial power distribution systems, data centers, and power plant auxiliary circuits where reliable fault detection and coordination are critical.

The PR122P-LSIG E1-E6 operates without requiring an external power supply, drawing energy from the circuit breaker‘s built-in current transformers. This self-powered design simplifies installation and ensures protection remains active even during supply voltage disturbances. The unit features an LCD display with navigation buttons, allowing technicians to view real-time measurements, configure protection settings, and access event logs directly from the breaker front panel. With support for zone selectivity (ZSI) on S and G functions, the 1SDA058198R1 enables coordinated protection across multiple breaker levels, minimizing downtime by isolating faults to the nearest upstream device.

Positioned as the full-featured LSIG variant within the PR122/P family, the PR122P-LSIG E1-E6 bridges the gap between the basic LSI version and the higher-tier PR123/P. It suits retrofit applications where existing Emax E1 through E6 breakers require upgraded protection capabilities or replacement of failed trip units. The 1SDA058198R1 is compatible with both fixed and withdrawable versions of the Emax series, covering rated currents from 400A to 6300A depending on the installed rating plug.

Technical Specifications