Four-Pole

A four-pole device is designed to switch or protect four electrical conductors simultaneously – typically the three phases plus the neutral conductor in a three-phase system. This configuration is common in photovoltaic systems, commercial installations, and industrial environments where maximum safety and full circuit isolation are required.

Four-pole breakers and switches ensure that not only the three phases but also the neutral line are disconnected, preventing backfeed currents and ensuring compliance with safety standards. They simplify maintenance, provide reliable protection, and are indispensable in advanced PV setups and high-demand electrical networks.