Why Choose the ABB XRG250BS-185/10-4P Switch Disconnector Fuse?
The ABB 1SEP204487R3700, also identified as the XRG250BS-185/10-4P, is a robust four-pole switch disconnector fuse designed for reliable circuit isolation and fuse protection in low-voltage electrical distribution systems. As part of the ABB SlimLine XR Gold series, it is engineered for industrial switchboards, distribution panels and other installations where dependable switching and protection are essential.
This switch disconnector fuse combines manual circuit isolation with overcurrent and short-circuit protection provided by compatible BS fuse links. Its horizontal busbar-mounted construction supports efficient panel layouts, while the clearly defined switch position helps maintenance personnel confirm whether the contacts are open or closed.
With a rated operational current of 250 A at 500 V AC, the XRG250BS-185/10-4P is suitable for demanding commercial and industrial power distribution applications. It is designed for four-pole systems with a 185 mm phase distance and 10 mm busbar thickness, providing compatibility with established low-voltage switchboard configurations.
Key Advantages
- Reliable four-pole switching, isolation and fuse protection.
- 250 A rated operational current for industrial distribution circuits.
- 500 V AC rated operational voltage.
- Designed for 185 mm busbar spacing and 10 mm busbar thickness.
- Front protection rating of IP41.
- Compatible with British Standard B2 fuse links.
- Manual operation provides straightforward and dependable circuit isolation.
- Busbar-mounted design supports compact and efficient switchboard construction.
Key Features
- ABB SlimLine XR Gold switch disconnector fuse.
- Four-pole configuration.
- 250 A rated operational current in AC-22B applications.
- 500 V AC rated operational voltage.
- 1 kV rated insulation voltage.
- 8 kV rated impulse withstand voltage.
- Suitable for BS B2 fuse links.
- Bolt-type main circuit terminals.
- Manual operating mechanism.
- Front-mounted switching control and position indication.
- Manufactured in accordance with IEC 60947-3.
Reliable Electrical Isolation and Fuse Protection
Switch disconnector fuses provide a combination of visible circuit isolation and fuse-based overcurrent protection. When fitted with correctly selected fuse links, the ABB XRG250BS-185/10-4P helps protect cables, switchgear and connected equipment against damaging fault currents while allowing the circuit to be manually disconnected for servicing or maintenance.
The ABB SlimLine XR Gold design is developed for efficient integration into low-voltage distribution assemblies. Its busbar-mounted format helps maximise available switchboard space, while its four-pole configuration enables simultaneous switching of three phases and the neutral conductor where required by the installation design.
Typical Applications
- Low-voltage industrial distribution boards.
- Main and sub-distribution switchboards.
- Commercial building electrical systems.
- Manufacturing and process control installations.
- Data centres and critical power distribution systems.
- Hospitals, airports and public infrastructure.
- Motor control centres and machinery power distribution.
- Emergency power and generator distribution systems.
- Photovoltaic and renewable energy installations.
