Why Choose the ABB MBT245 NH2 Fuse Switch Expansion 2PW?
The ABB MBT245 is a modular NH2 fuse switch expansion from the ABB CombiLine N interior expansion system. Supplied under ABB order code 2CPX041786R9999, this unpopulated module is designed for integrating NH2 fuse switch disconnectors into compatible low-voltage sub-distribution assemblies and belongs to ABB’s DESUJ Sub Distribution product group.
Designed in a 2PW / two-field-width format, the MBT245 measures 500 mm wide × 750 mm high and provides 120 space units. It accommodates up to four NH2 fuse switch disconnectors, providing a structured solution for multiple high-current fused outgoing feeders within a coordinated modular switchboard layout.
The MBT245 is intended for compatible ABB ZH441 NH2 fuse switch disconnectors rated up to 400 A and a 3-pole busbar system. The applicable double-storey busbar arrangement is rated up to 630 A, and the module is designed for installation on a WR mounting frame in cabinets from 225 mm depth.
Key Advantages
- Purpose-designed NH2 fuse switch expansion for ABB CombiLine N assemblies.
- 2PW / 500 mm field width provides capacity for multiple high-current outgoing feeders.
- Accommodates up to four NH2 fuse switch disconnectors.
- Designed for a 3-pole busbar system.
- Supports a maximum rated current of 630 A in the applicable double-storey arrangement.
- Dedicated modular format supports organised professional switchboard construction.
Key Features
- ABB MBT245 NH2 fuse switch expansion module.
- 2PW / two-field-width configuration.
- 5 RE / 750 mm module height.
- 500 mm module width.
- 120 space units.
- Capacity for 4 × NH2 fuse switch disconnectors.
- Designed for ABB ZH441 NH2 fuse switch disconnectors.
- ZH441 devices rated up to 400 A.
- 3-pole busbar system.
- 630 A maximum rated current in the double-storey configuration.
- Designed for installation on a WR mounting frame.
- Supplied as an unpopulated expansion module.
High-Current NH2 Fuse Protection for Distribution Assemblies
NH2 fuse switch disconnectors combine fuse-based overcurrent protection with switching and isolation for high-current low-voltage distribution circuits. The ABB MBT245 provides dedicated positions for up to four compatible NH2 fuse switch disconnectors, enabling several protected outgoing feeders to be integrated within a single two-field-wide CombiLine N module.
The MBT245 is designed around a 3-pole double-storey busbar arrangement rated up to 630 A. Used with compatible ABB ZH441 fuse switch disconnectors and the appropriate WR mounting frame, it provides panel builders with a coordinated platform for constructing organised, serviceable and robust fused distribution systems.
Typical Applications
- ABB CombiLine N sub-distribution assemblies.
- NH2 fused feeder protection and isolation.
- Low-voltage electrical distribution boards.
- Commercial and industrial switchboards.
- Multiple high-current outgoing distribution circuits.
- Panel-building and distribution-board expansion projects.
