Why Choose the ABB MT345B NH2 Fuse Switch Expansion 3PW?
The ABB MT345B, order code 2CPX041322R9999, is a populated NH2 fuse switch-disconnector expansion module designed for ABB CombiLine low-voltage sub-distribution systems. Supplied mounted and installed for cabinet integration, it combines six ABB XLP NH2 fuse switch-disconnectors with a 3-pole busbar system to provide reliable fused isolation and high-current power distribution within professional electrical assemblies.
Designed for demanding commercial and industrial distribution applications, the MT345B is equipped with six NH2 fuse switch-disconnectors for 400 A applications and separator shutters. Its double-tier busbar configuration supports a maximum rated current of 630 A, while the integrated 3-pole busbar system uses M12 connection screws for secure electrical connections.
The MT345B occupies 3 panel widths (PW) and 5 grid units (GU), corresponding to dimensions of 750 mm high × 750 mm wide with 180 space units (PLE). It is suitable for cabinets from 225 mm deep and is designed for installation on a compatible WR mounting frame, which must be ordered separately.
Key Advantages
- Complete NH2 fuse switch-disconnector expansion module for ABB CombiLine systems.
- Supplied populated with six ABB XLP NH2 fuse switch-disconnectors.
- Designed for 400 A NH2 fuse switch-disconnector applications.
- 630 A maximum module rated current with double-tier busbar arrangement.
- Integrated 3-pole busbar system for professional power distribution.
- M12 connection screws provide secure busbar connections.
- Supplied with separator shutters for the fuse switch-disconnector arrangement.
- Provides 180 space units (PLE) within a large 3-panel-width format.
Key Features
- ABB MT345B NH2 fuse switch-disconnector module.
- ABB order code 2CPX041322R9999.
- Part of the ABB CombiLine interior expansion system.
- Populated with 6 × NH2 fuse switch-disconnectors.
- ABB XLP fuse switch-disconnector equipment.
- Designed for 400 A NH2 fuse switch-disconnectors.
- 630 A maximum rated current in the double-tier configuration.
- 3-pole busbar system.
- M12 busbar connection screws.
- Supplied with separator shutters.
- 43 mm spacing from the front edge of the equipment to the cover.
- 3 panel widths (PW) and 5 grid units (GU).
- 180 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.
- Designed for a separately ordered WR mounting frame.
Reliable NH2 Fused Isolation for High-Current Distribution
NH fuse switch-disconnectors combine fuse protection with load isolation, allowing electrical circuits to be protected against overcurrent while providing a practical means of disconnecting outgoing circuits for operation and maintenance. The ABB MT345B integrates six NH2 fuse switch-disconnectors into a modular CombiLine assembly, simplifying the construction of multiple high-current fused outgoing circuits within large distribution cabinets.
The MT345B uses a double-tier 3-pole busbar arrangement with a maximum rated current of 630 A. Its six NH2 fuse switch-disconnectors, 180 space units and 3-panel-width construction make it particularly suitable for larger sub-distribution assemblies where several high-current fused feeders must be accommodated within an organised modular system.
Typical Applications
- Low-voltage electrical distribution boards.
- Commercial and industrial sub-distribution systems.
- ABB CombiLine cabinet assemblies.
- High-current fused outgoing circuits requiring NH2 protection.
- Industrial power distribution and circuit isolation.
- Electrical switchgear and distribution cabinets.
- Three-pole distribution systems requiring multiple fused feeders.
