UKP-400F22K 400A 4 Pole AC Switch Disconnector Panel-Mount Isolator with Neutral Pole & Front Handle for TN-S/TT Distribution Systems

The UKP-400F22K is a 4-pole, 400A rated AC switch-disconnector designed for panel/base mounting in three-phase-plus-neutral (3P+N) distribution systems, such as TN-S and TT earthing arrangements where the neutral conductor must also be switched or isolated.

Sharing the same UKP-400 platform electrical performance as the 2-pole and 3-pole variants, this version adds a fourth pole to provide complete four-conductor isolation — an important requirement in many main incoming switchboards, generator changeover points, and installations where neutral disconnection is mandated by local wiring regulations.

The operating handle is fixed to the front face of the switch and is designed for indoor, in-cabinet actuation, keeping the control point close to the switch body for straightforward panel layouts. Internally, the switch uses the same spring-charged quick-make/quick-break operating mechanism to ensure safe, arc-controlled switching under load, along with a visible contact-position window so maintenance staff can confirm true isolation status at a glance — a key requirement for lockout/tagout procedures on 4-wire systems.