Why Choose the ABB MT343 NH1 Fuse Switch Expansion 3PW?
The ABB MT343, order code 2CPX041316R9999, is a mounted CombiLine NH1 fuse switch disconnector expansion module designed for ABB electrical sub-distribution systems. Part of the ABB CombiLine N interior expansion system and the DESUJ Sub Distribution product group, it provides a purpose-designed installation platform for multiple NH1 fuse switch disconnectors within professional low-voltage distribution cabinets.
The MT343 has a 5 RE / 750 mm height and a three-field width of 750 mm, providing 180 space units. The module is supplied unequipped and is prepared for the installation of up to six NH1 fuse switch disconnectors, enabling multiple fused outgoing circuits to be integrated within a single CombiLine module.
Designed for a three-pole busbar system, the MT343 supports ABB ZH431 NH1 fuse switch disconnectors rated up to 250 A. The associated double-level busbar arrangement supports a maximum rated current of 630 A, using 30 × 10 mm copper rails with M10 connections. The module requires an ABB WR mounting frame, is suitable from a cabinet depth of 225 mm and is not intended for fire-protection housings.
Key Advantages
- Purpose-designed NH1 fuse switch disconnector expansion module for ABB CombiLine N systems.
- Accommodates up to six NH1 fuse switch disconnectors.
- Supports ABB ZH431 250 A NH1 fuse switch disconnectors.
- Designed for a three-pole busbar system.
- Supports a maximum rated current of 630 A with the double-level busbar arrangement.
- Three-field-width, 750 mm design provides substantial installation capacity.
- 180 space units across a 5 RE module height.
- Designed for installation on an ABB WR mounting frame.
Key Features
- ABB CombiLine N interior expansion system.
- MT343 mounted NH1 fuse switch disconnector module.
- 5 RE / 750 mm module height.
- 3 panel widths / 750 mm overall width.
- 180 space units.
- Unequipped for installation of up to six NH1 fuse switch disconnectors.
- Compatible with ABB ZH431 NH1 fuse switch disconnectors.
- 250 A maximum rated current per ZH431 disconnector.
- 630 A maximum rated current with the double-level busbar arrangement.
- 3-pole busbar system.
- Compatible with 30 × 10 mm copper rails.
- M10 busbar connections.
- Suitable from a minimum cabinet depth of 225 mm.
- Designed for a WR mounting frame.
High-Capacity NH1 Fused Distribution
NH fuse switch disconnectors combine fused overcurrent protection with switching and isolation functions, making them well suited to professional low-voltage power distribution assemblies. The ABB MT343 provides a dedicated three-field-width platform for installing up to six NH1 fuse switch disconnectors, allowing multiple high-current outgoing circuits to be arranged efficiently within one CombiLine N module.
With 180 space units, a 750 mm-wide installation area and support for a three-pole double-level busbar system rated up to 630 A, the MT343 is suited to demanding commercial and industrial distribution assemblies. Compatibility with ABB ZH431 disconnectors and the ZH318 30 × 10 mm copper-rail busbar system provides a coordinated ABB solution for high-capacity fused distribution.
Typical Applications
- Commercial and industrial sub-distribution boards.
- Multi-circuit NH1 fused power distribution.
- Electrical distribution cabinets and switchboards.
- Low-voltage circuit protection and isolation.
- High-current outgoing feeder circuits.
- Building-services power distribution systems.
- ABB CombiLine N cabinet expansion and interior fit-out.
