Why Choose the ABB MT345 NH2 Fuse Switch Expansion?
The ABB MT345 is an NH2 fuse switch expansion assembly designed for ABB CombiLine N sub-distribution systems. Supplied under ABB order code 2CPX041328R9999, this 3-panel-width expansion provides a structured solution for integrating multiple NH2 fuse switch disconnectors into compatible low-voltage distribution cabinets.
The MT345 is supplied unpopulated for ABB ZH441 NH2 fuse switch disconnectors rated at 400 A and is designed for a 3-pole busbar system. Its larger configuration provides positions for up to six NH2 fuse switch disconnectors, making it suitable for distribution assemblies requiring several high-current fused outgoing circuits.
With a width of 750 mm, capacity of 180 PLE and suitability for cabinets from 225 mm depth, the MT345 provides substantial installation capacity within ABB modular distribution systems. The assembly is designed for installation on a compatible WR mounting frame, which must be ordered separately.
Key Advantages
- Purpose-designed NH2 fuse switch expansion for ABB sub-distribution systems.
- 3-panel-width configuration with a width of 750 mm.
- Provides positions for up to six NH2 fuse switch disconnectors.
- Designed for a 3-pole busbar system.
- Suitable for ABB ZH441 NH2 fuse switch disconnectors rated at 400 A.
- 180 PLE capacity supports larger distribution-board configurations.
Key Features
- ABB MT345 fuse switch expansion assembly.
- NH2 fuse switch disconnector format.
- 3 PW / 750 mm width.
- Positions for six NH2 fuse switch disconnectors.
- 180 PLE installation capacity.
- Designed for 3-pole busbar systems.
- 440 A maximum rated current for single-storey arrangements.
- 630 A maximum rated current for double-storey arrangements.
- Suitable from a cabinet depth of 225 mm.
- Designed for installation on a WR mounting frame.
Reliable Fuse Protection for Sub-Distribution Systems
NH fuse switch disconnectors combine fused circuit protection with switching and isolation functionality for low-voltage distribution systems. Dedicated expansion assemblies such as the ABB MT345 provide the structured mounting and busbar arrangement required to incorporate multiple NH devices into larger distribution cabinets.
The MT345 is configured for six NH2 fuse switch positions and a 3-pole busbar system, supporting substantial fused distribution capacity within ABB CombiLine N assemblies. The unit is intended for use on a WR mounting frame, which is ordered separately, and is not suitable for fire-protection housings.
Typical Applications
- Commercial and industrial sub-distribution boards.
- Low-voltage power distribution cabinets.
- NH2 fuse switch disconnector installations.
- Distribution systems with multiple high-current outgoing circuits.
- ABB CombiLine N modular distribution assemblies.
- Industrial switchboard and electrical panel-building projects.
