Why Choose the ABB MT344 NH2 Fuse Switch Expansion 3PW?
The ABB MT344 is a CombiLine NH2 fuse switch-disconnector expansion module designed for integration into compatible ABB low-voltage distribution cabinets. Supplied under ABB order code 2CPX041325R9999, the module is unpopulated and provides the prepared internal arrangement for installing up to three NH2 fuse switch-disconnectors.
The MT344 is configured for 3 panel widths (3 PW), with a field width of 750 mm and a module height of 450 mm. Its 3 RE format provides 108 space units, offering a structured solution for incorporating three NH2 fused outgoing circuits into commercial and industrial distribution assemblies.
Designed for a 3-pole busbar system, the MT344 has a maximum rated current of 440 A in its specified single-level configuration. The module is supplied with plastic covers featuring equipment cut-outs, a RAL 7035 finish and 90-degree press-and-turn closures. It can be used in compatible cabinets from 225 mm depth and requires a separately ordered WR mounting frame.
Key Advantages
- Purpose-designed NH2 fuse switch-disconnector expansion module for ABB CombiLine systems.
- Prepared for installation of up to three NH2 fuse switch-disconnectors.
- Designed for a 3-pole busbar system.
- Maximum rated current of 440 A.
- 3 PW configuration provides a wide 750 mm distribution field.
- 108 space units within a compact 3 RE arrangement.
- Unpopulated format allows the appropriate NH2 devices to be selected for the finished assembly.
- Coordinated ABB CombiLine construction supports efficient professional panel building.
Key Features
- ABB CombiLine internal mounting system.
- 3 panel widths (3 PW).
- 3 raster units (3 RE).
- 450 mm module height.
- 750 mm field width.
- 108 space units.
- Unpopulated for installation of 3 NH2 fuse switch-disconnectors.
- 3-pole busbar system configuration.
- 440 A maximum rated current.
- Supplied without separator shutters.
- Plastic covers with equipment cut-outs.
- RAL 7035 cover finish.
- 90-degree press-and-turn cover closures.
- Suitable for cabinets from 225 mm depth.
- Designed for use with a separately ordered WR mounting frame.
Flexible NH2 Fuse Protection for Distribution Systems
NH fuse switch-disconnectors provide fuse-based circuit protection together with switching and isolation functionality for demanding low-voltage power circuits. The ABB MT344 provides the prepared CombiLine infrastructure for installing up to three NH2 fuse switch-disconnectors, allowing panel builders to configure fused feeders around the requirements of the finished distribution assembly.
The 3-pole, 440 A busbar-system arrangement and 3 PW field provide a coordinated platform for substantial commercial and industrial distribution applications. Because the module is supplied unpopulated, the required NH2 fuse switch-disconnectors can be selected separately, while the prepared covers and cabinet-mounted construction support efficient integration into compatible ABB assemblies.
Typical Applications
- Low-voltage sub-distribution boards.
- ABB CombiLine distribution assemblies.
- NH2 fused outgoing feeder circuits.
- Commercial building power distribution.
- Industrial low-voltage distribution panels.
- Feeder protection, switching and circuit isolation.
- Panel-building applications requiring up to three NH2 fuse switch-disconnectors in a 3 PW field.
