Why Choose the ABB MR103 Busbar Module?
The ABB MR103 is a mounted CombiLine N busbar module designed for structured power distribution within compatible ABB subdistribution cabinets. Supplied under ABB order code 2CPX041414R9999, this interior expansion module provides a 1 PW / 250 mm field width and is designed around a horizontal 60 mm busbar system.
The MR103 is supplied unpopulated for the vertical installation of compatible D0 and NH fuse switch disconnectors or bus-mounted fuse sockets. It supports a 3-pole busbar arrangement with up to three copper rails and incorporates the ABB ZX146 busbar bracket, providing a coordinated platform for building reliable low-voltage distribution assemblies.
With a module height of 3 GU / 450 mm, a useful width of 165 mm and capacity for 36 PLE, the MR103 combines compact cabinet integration with a maximum rated current of 630 A. It is suitable from a cabinet depth of 275 mm, subject to the depth requirements of the installed equipment.
Key Advantages
- Purpose-designed busbar module for ABB CombiLine N systems.
- Maximum rated current of 630 A for substantial distribution loads.
- Horizontal 60 mm busbar system for structured power distribution.
- Supports 3-pole busbar arrangements with up to three copper rails.
- 1 PW / 250 mm field width for modular cabinet integration.
- Suitable for compatible D0 and NH fuse switch disconnectors and bus-mounted fuse sockets.
- Integrated ZX146 busbar bracket simplifies coordinated assembly.
Key Features
- ABB CombiLine N interior expansion system.
- 3 GU / 450 mm module height.
- 1 PW / 250 mm module width.
- 165 mm useful installation width.
- 36 PLE installation capacity.
- 630 A maximum rated current.
- 400 V AC rated operational voltage.
- 690 V rated insulation voltage.
- 50 Hz rated frequency.
- Horizontal busbars with 60 mm centre spacing.
- Closed plastic cover with 90-degree push-turn fastener.
- Designed for vertical orientation of compatible distribution equipment.
Reliable High-Current Distribution for Modular Cabinets
Busbar modules such as the ABB MR103 provide a structured method of distributing electrical power through modular low-voltage assemblies. Its horizontal 60 mm busbar arrangement provides a consistent mounting platform for compatible vertically installed fuse switch disconnectors and bus-mounted fuse sockets while supporting rated currents up to 630 A.
The MR103 forms part of ABB's coordinated CombiLine N interior expansion system. Its defined field dimensions, ZX146 busbar bracket and closed cover support organised panel construction, while the modular format allows panel builders to combine the busbar section with other compatible CombiLine N functional modules.
Typical Applications
- ABB CombiLine N subdistribution boards.
- Commercial and industrial low-voltage distribution cabinets.
- Busbar-based fuse distribution systems.
- D0 and NH fuse switch disconnector installations.
- Bus-mounted fuse socket assemblies.
- Modular switchboard and distribution panel construction.
