The ABB REF615E-E is a multifunctional, compact, and cost-optimized feeder protection relay from ABB's Relion® 615 series, representing a specific variant within the "E" family designed for essential protection and control applications. As part of the Adaptive Protection concept, it delivers a focused set of core protection functions tailored for basic feeder protection in industrial, commercial, and utility medium-voltage (up to 24kV) distribution networks. The "-E" suffix typically denotes an economy or essential version, offering a streamlined feature set for applications where the full suite of functions in the standard REF615 is not required, while maintaining high reliability and key communication capabilities.

Weidmüller SAI-8-M 4P M12 is a family of passive sensor-actuator distribution boxes (junction boxes) with 8 M12 ports. Several variants exist with different connection technologies (screw terminal, IDC, etc.) and certifications (e.g., Ex). The description and key parameters are based on the standard hood version.