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1SCA109344R1001 ABB 1250 A 4-Pole BS Switch Fuse with Handle Between Poles
ABB OS1250B13N1P is a 1250 A 4-pole British Standard switch fuse for D1 fuse links with a front-operated mechanism between the poles, a switched fourth pole with solid link, and a pistol handle and shaft included.
£2,483.20
Why Choose the ABB OS1250B13N1P 1250 A 4-Pole Switch Fuse?
The ABB OS1250B13N1P is a heavy-duty 1250 A 4-pole switch fuse designed for high-current switching, isolation and fuse-based protection in low-voltage power distribution systems. Part of the ABB OS fuse switch range, it combines robust switching performance with the protection provided by British Standard fuse links.
Designed around the BS fuse system, the OS1250B13N1P uses D1 fuse links and features a front-operated mechanism positioned between the poles. Its 4-pole arrangement includes a switched fourth pole with a solid link, providing coordinated switching for applications requiring four-pole isolation.
Rated at 1250 A, the OS1250B13N1P is supplied with a pistol operating handle and shaft for external panel operation. Its base-mounted construction, heavy-duty lug terminals and operational capability up to 690 V AC make it suitable for substantial industrial switchboards, distribution assemblies and high-current feeder applications.
Key Advantages
- Heavy-duty 1250 A 4-pole switch fuse for high-current distribution.
- Uses the British Standard fuse system with D1 fuse links.
- Operating mechanism positioned between the poles for an integrated switching arrangement.
- Supplied with a pistol handle and operating shaft.
- Combines switching, isolation and fuse-based circuit protection.
- Front-operated and base-mounted for switchboard integration.
- Fourth pole is switched using a solid link.
Key Features
- ABB OS1250 switch fuse.
- 1250 A rated current.
- 4-pole configuration.
- British Standard fuse system.
- Designed for D1 fuse links.
- Front-operated mechanism.
- Operating mechanism located between the poles.
- Switched fourth pole with solid link.
- Pistol handle and shaft included.
- 50 mm wide lug terminals.
- Base-mounted construction.
- Suitable for switching voltages up to 690 V AC.
High-Current Switching, Isolation and Fuse Protection
The ABB OS1250B13N1P combines high-current manual switching and isolation with the protection provided by appropriately selected British Standard D1 fuse links. Its 1250 A, 4-pole configuration is designed for substantial low-voltage distribution circuits where reliable disconnection and high-performance fuse protection are required.
The operating mechanism is positioned between the poles, while the fourth pole is switched using a solid link. With its supplied pistol handle and shaft, base-mounted construction and heavy-duty lug terminals, the OS1250B13N1P provides a practical solution for integration into high-current industrial switchboards and power-distribution assemblies.
Typical Applications
- High-current industrial power distribution systems.
- Main low-voltage switchboards.
- Four-pole feeder switching and isolation.
- Industrial plant and machinery power supplies.
- Power distribution and control assemblies.
- Installations requiring high-current British Standard fuse protection.
Technical Specifications
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| Mounting Type | Base / panel | |
|---|---|---|
| Series | OS1250 | |
| ABB order code | 1SCA109344R1001 | |
| Product type | Switch fuse / fuse switch disconnector | |
| ABB product group | 311021-OS Fuse Switches | |
| Rated current | 1250 A | |
| Number of poles | 4 | |
| Fuse system | British Standard | |
| Mechanical fuse size | D1 | |
| Switching voltage | Up to 690 V AC | |
| Operation | Front operated | |
| Operating mechanism | Between the poles | |
| Fourth pole | Switched with solid link | |
| Fourth-pole position | Left side | |
| Mounting | Base mounting | |
| Terminal type | Lug terminals | |
| Terminal width | 50 mm | |
| Handle | Pistol handle included | |
| Operating shaft | Included | |
| Pollution degree | 3 | |
| Standard | IEC 60947-3 |
Frequently Asked Questions
What is the ABB OS1250B13N1P used for?
The ABB OS1250B13N1P is a 1250 A 4-pole switch fuse designed for high-current switching, isolation and fuse-based protection in low-voltage electrical distribution systems.
What fuse system does the ABB OS1250B13N1P use?
The OS1250B13N1P uses the British Standard fuse system and is designed for D1 fuse links.
Where is the operating mechanism positioned on the ABB OS1250B13N1P?
The OS1250B13N1P has its operating mechanism positioned between the poles, providing an integrated arrangement for switchboard installation.
What is the fourth-pole arrangement on the ABB OS1250B13N1P?
The OS1250B13N1P has a switched fourth pole with a solid link, positioned on the left side of the assembly.
Does the ABB OS1250B13N1P include a handle and shaft?
Yes. The OS1250B13N1P is supplied with a pistol operating handle and shaft for external front operation when installed in a suitable electrical enclosure or switchboard.
Trusted ABB High-Current Fuse Switching Technology
ABB OS switch fuses combine dependable high-current switching and isolation with British Standard fuse protection, providing a robust solution for demanding industrial and commercial low-voltage power distribution systems.
