Why Choose the ABB MR302 Busbar Module Expansion?
The ABB MR302 is a CombiLine N busbar module expansion designed for structured low-voltage sub-distribution assemblies. Supplied under ABB order code 2CPX041408R9999, this 3-panel-width module provides a horizontal 60 mm busbar system for integrating compatible fuse switch disconnectors and bus-mounted fuse sockets.
The MR302 is an unpopulated module designed for a 3-pole busbar system with up to three copper busbars and a 60 mm busbar centre distance. It includes ABB ZX146 busbar holders and provides two useful installation widths of 320 mm, supporting vertically installed D0 and NH fuse switch disconnectors or compatible bus-mounted fuse sockets.
With a module size of 300 × 750 mm, 72 PLE capacity and a maximum rated current of 440 A, the MR302 provides a robust solution for larger distribution assemblies. It is designed for cabinets from 225 mm depth and requires a compatible WR mounting frame, which is ordered separately.
Key Advantages
- Purpose-designed 60 mm horizontal busbar module for ABB CombiLine N systems.
- 3-panel-width configuration with a width of 750 mm.
- 440 A maximum rated current for substantial distribution requirements.
- Designed for a 3-pole busbar system with up to three copper rails.
- Supports compatible D0 and NH fuse switch disconnectors and bus-mounted fuse sockets.
- 72 PLE capacity provides substantial installation space for distribution equipment.
Key Features
- ABB MR302 CombiLine N busbar module expansion.
- 3 PW / 750 mm width.
- 2 RE / 300 mm height.
- 60 mm busbar centre distance.
- 3-pole horizontal busbar arrangement.
- Maximum of three copper busbars.
- 440 A rated current.
- 400 V AC rated operational voltage.
- 72 PLE installation capacity.
- Two useful installation widths of 320 mm.
- Supplied with ZX146 busbar holders.
- Plastic covers with 90-degree press-and-turn closure.
Structured Busbar Distribution for Electrical Panels
Busbar systems provide an efficient method of distributing electrical power throughout low-voltage switchboards and distribution cabinets. A modular busbar arrangement simplifies the integration of protective and switching devices while helping panel builders maintain an organised, accessible and serviceable internal layout.
The ABB MR302 combines a horizontal 60 mm busbar arrangement with vertically installed compatible equipment. Its 3-pole configuration, 440 A rated current and 72 PLE capacity make it suitable for substantial CombiLine N distribution assemblies requiring D0 or NH fuse switch disconnectors and compatible bus-mounted fuse sockets.
Typical Applications
- Commercial and industrial sub-distribution boards.
- Low-voltage power distribution cabinets.
- Horizontal 60 mm busbar systems.
- D0 and NH fuse switch disconnector installations.
- ABB CombiLine N modular distribution assemblies.
- Industrial switchboard and electrical panel-building projects.
