Why Choose the ABB MR302B Busbar Module Expansion 3PW?
The ABB MR302B, order code 2CPX041411R9999, is a populated 60 mm horizontal busbar expansion module designed for ABB CombiLine low-voltage sub-distribution systems. Supplied mounted and installed for cabinet integration, it combines a 3-pole busbar arrangement with vertically installed D02 bus-mounting fuse sockets to provide compact fused distribution within professional electrical assemblies.
The MR302B is populated with 24 D02 bus-mounting fuse sockets and is designed for a maximum rated current of 250 A. Its 3-pole busbar system has a 60 mm busbar centre distance, uses ABB ZX146 busbar holders and includes the ZX172 end cover, providing a purpose-designed modular arrangement for ABB CombiLine distribution systems.
The MR302B occupies 3 panel widths (PW/FB) and 2 grid units (RE), corresponding to 300 mm high × 750 mm wide with 72 space units (PLE). The 3-panel-width construction is additionally braced in the centre, is suitable for cabinets from 225 mm deep and requires a compatible WR mounting frame, which must be ordered separately.
Key Advantages
- Complete 60 mm horizontal busbar module for ABB CombiLine systems.
- Supplied populated with 24 D02 bus-mounting fuse sockets.
- 250 A maximum rated current for the populated module.
- Designed for 3-pole busbars with 60 mm centre spacing.
- Includes ABB ZX146 busbar holders and ZX172 end cover.
- Additional centre bracing supports the wide 3-panel-width construction.
- Provides 72 space units (PLE) for organised cabinet integration.
- Designed for installation on a compatible WR mounting frame.
Key Features
- ABB MR302B populated busbar module.
- ABB order code 2CPX041411R9999.
- Part of the ABB CombiLine interior expansion system.
- Horizontal 60 mm busbar system.
- Designed for 3-pole busbars.
- Populated with 24 D02 bus-mounting fuse sockets.
- 250 A maximum rated current.
- 60 mm busbar centre distance.
- 32 mm spacing between the copper busbar and cover.
- Equipped with ZX146 busbar holders.
- Includes ZX172 end cover.
- Additional centre bracing for the 3-panel-width module.
- 3 panel widths (PW/FB) and 2 grid units (RE).
- 72 space units (PLE).
- Plastic cover with equipment cut-out in RAL 7035 light grey.
- 90-degree push-turn cover fastener.
- Suitable for cabinets from 225 mm depth.
- Requires a separately ordered WR mounting frame.
Compact Fused Distribution with a 60 mm Busbar System
Horizontal busbar modules provide a structured method of distributing electrical power across multiple outgoing circuits within a low-voltage distribution assembly. The ABB MR302B combines a 3-pole 60 mm busbar arrangement with 24 vertically installed D02 bus-mounting fuse sockets, allowing fused outgoing circuits to be integrated efficiently within the CombiLine modular system.
The busbars are supported using ABB ZX146 holders with a centre distance of 60 mm, while the 3-panel-width module incorporates additional central bracing for mechanical support. With a maximum rated current of 250 A in its populated configuration, the MR302B provides a practical solution for modular fused sub-distribution where multiple D02 outgoing circuits are required.
Typical Applications
- Low-voltage electrical distribution boards.
- Commercial and industrial sub-distribution systems.
- ABB CombiLine cabinet assemblies.
- Fused outgoing circuit distribution using D02 fuse sockets.
- Three-pole horizontal busbar distribution systems.
- Building services and electrical infrastructure distribution.
- Switchgear assemblies requiring multiple compact fused outgoing circuits.
