Why Choose the ABB MN274 N+PE / Terminal Expansion 2PW?
The ABB MN274 is a CombiLine N/PE busbar and terminal expansion module designed for structured neutral, protective-earth and terminal distribution within low-voltage cabinets. Supplied under ABB order code 2CPX041282R9999, the MN274 is the mounted cabinet version with a 2PW / two-field-width configuration.
The MN274 combines provision for a 2-pole N/PE busbar system with an additional DIN rail for terminal blocks. It has a module height of 2 RE / 300 mm, a field width of 2 FB / 500 mm and 48 space units, while providing 438 mm usable terminal width and continuously adjustable depth from 90–145 mm.
Designed for rated currents up to 440 A, the module incorporates a ZX518 busbar holder for a maximum of two copper busbars. Closed RAL 7035 plastic covers with 90-degree press-and-turn fasteners complete the assembly, while the copper busbars and compatible EDF or WR mounting frame are ordered separately.
Key Advantages
- Combines N/PE busbar accommodation and terminal expansion within one CombiLine module.
- Wide 2PW / 500 mm configuration provides substantial wiring and terminal capacity.
- Supports a 2-pole horizontal busbar system with up to two copper busbars.
- Provides an additional DIN rail for terminal blocks.
- Continuously adjustable usable depth of 90–145 mm supports flexible terminal positioning.
- Maximum rated current of 440 A for professional low-voltage distribution applications.
Key Features
- ABB CombiLine interior expansion system.
- Designed for N/PE busbars and terminal blocks.
- 2 RE / 300 mm module height.
- 2 FB / 500 mm field width.
- 48 space units.
- 438 mm usable width for terminal blocks.
- Usable depth continuously adjustable from 90–145 mm.
- 2-pole horizontal busbar arrangement.
- Includes ZX518 busbar holder.
- Accommodates a maximum of two copper busbars.
- Maximum rated current of 440 A.
- Closed RAL 7035 plastic covers with 90-degree press-and-turn fasteners.
- Suitable for compatible EDF or WR mounting frames.
Combined N/PE Distribution and Terminal Expansion
The ABB MN274 provides a coordinated interior section for neutral and protective-earth busbars together with terminal blocks. Its horizontal two-pole busbar arrangement accommodates up to two copper rails, while the additional DIN rail provides dedicated mounting capacity for terminal blocks across a usable width of 438 mm.
Continuous depth adjustment from 90–145 mm allows the terminal rail position to be adapted to the requirements of the assembly. The MN274 is supplied as a mounted cabinet module; the copper busbars and appropriate EDF or WR mounting frame must be selected and ordered separately for the completed installation.
Typical Applications
- Neutral and protective-earth distribution in low-voltage cabinets.
- Terminal block expansion within ABB CombiLine assemblies.
- Commercial and industrial sub-distribution boards.
- Low-voltage switchgear and distribution assemblies.
- Structured N/PE busbar and terminal wiring sections.
- Professional panel-building and electrical installation projects.
