The 3NJ6920-3DG00 is a CT busbar assembly for mounting four bushing current transformers onto a SENTRON 3NJ6 (NH00) in-line switch disconnector with fuses. Features 14 mm bushing openings, supporting three-phase plus neutral or ground-fault monitoring with CTs requiring defined primary conductor apertures.

Modular CT Mounting

The four-position design with 14 mm bushing openings enables comprehensive monitoring — three phases plus an additional function (neutral, earth leakage, or protection) — while ensuring precise CT positioning via the specified aperture. Each position provides a consistent 14 mm conductor path. Snaps into the 3NJ6 disconnector and can be retrofitted at any time.

Key Parameters

Retrofittable Design

All 3NJ6920 series busbar assemblies can be retrofitted at any time — no need to disconnect the main circuit or remove the switch disconnector from the panel. The plug-in interface ensures quick installation without tools, letting panel builders add metering capability as requirements evolve.