Why Choose the ABB 1SEP204487R1700 Switch Disconnector Fuse?
The ABB 1SEP204487R1700 is a heavy-duty 250 A, 4-pole switch disconnector fuse designed for safe isolation and fuse protection within industrial low-voltage power distribution systems. Identified as the XRG250BS-50/5-4P, this manually operated unit is engineered for direct mounting on busbar systems with a 50 mm phase distance and 5 mm busbar thickness.
Designed for use with British Standard B2 fuses, the ABB XRG250BS-50/5-4P combines circuit isolation and fuse protection in one robust assembly. Its four-pole configuration allows simultaneous switching of three phases and the neutral conductor, making it suitable for commercial and industrial distribution systems where complete circuit isolation is required.
The unit is rated at 250 A AC-22B at 500 V AC and has a rated insulation voltage of 1,000 V. With bolt-connected main terminals, front-side manual operation and an IP41 front protection rating, it provides dependable performance in switchboards, distribution panels and power-control assemblies.
Key Advantages
- Heavy-duty 250 A switch disconnector fuse.
- 4-pole configuration for three-phase and neutral switching.
- Combines electrical isolation and fuse protection.
- Designed for British Standard B2 fuses.
- Direct mounting on 50 mm busbar systems.
- Robust manual operation for industrial installations.
Key Features
- ABB XRG switch disconnector fuse range.
- Model XRG250BS-50/5-4P.
- Order code 1SEP204487R1700.
- 250 A rated operational current.
- Four-pole switching arrangement.
- 500 V AC rated operational voltage.
- 1,000 V rated insulation voltage.
- 8 kV rated impulse withstand voltage.
- AC-22B utilisation category.
- British Standard fuse system.
- B2 fuse size.
- Manual front-side operation.
- Bolt-connected main terminals.
- IP41 front protection.
Combined Isolation and Fuse Protection
Switch disconnector fuses provide both manual circuit isolation and protection against overcurrent or short-circuit conditions when fitted with correctly selected fuse links. This combined functionality helps simplify switchboard design while providing maintenance personnel with a clear and dependable means of disconnecting electrical circuits.
The ABB XRG250BS-50/5-4P is designed for high-current busbar distribution systems where robust construction, reliable operation and complete four-pole isolation are required. Its British Standard fuse compatibility makes it particularly suitable for UK industrial and commercial electrical installations.
Typical Applications
- Industrial low-voltage switchboards.
- Main distribution panels.
- Busbar power distribution systems.
- Commercial electrical installations.
- Manufacturing and processing facilities.
- Incoming and outgoing feeder protection.
