D165T Pole-Mounted Circuit Breaker Enhances Safety for Outdoor Low-Voltage Distribution Networks

The D165T is built to last. Its housing is constructed from weather-resistant, glass-fiber reinforced plastic, achieving an IP31 protection rating to withstand dust and moisture. A key user-friendly feature is its unique wiring clamp design, which allows for the direct connection of the transformer's low-voltage side or other four-phase power sources without the need for pre-crimping lugs, saving significant installation time and effort. Furthermore, the arc chute grid is designed for easy replacement, extending the product's service life and simplifying maintenance in the field.

Operational safety and clarity are paramount. The breaker features a highly visible green position indicator that clearly shows whether the unit is open or closed. Its spring-charged closing mechanism is trip-free, meaning it cannot be held closed against a fault. The breaker can be conveniently operated using a floor-mounted handle. An integrated load indicator includes an enable/disable handle, and its trip function is visually signaled by the drop of an orange component, providing a clear, mechanical indication of an overload trip event.

With an operational temperature range of -25°C to 50°C and a pole-mounting design, the D165T is the ideal solution for utility companies and municipalities managing overhead low-voltage networks. Its rated specifications—440V, 165A, and a breaking capacity of up to 6800A—make it a robust and reliable choice for protecting distribution transformers from the damaging effects of overloads, short-circuits, and phase imbalances, ultimately leading to a more resilient electrical grid.