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1SCA022778R9940 ABB 250 A 4-Pole Fuse Switch Disconnector
ABB OS250B22N2P is a 250 A 4-pole front-operated fuse switch disconnector with a between-the-poles mechanism, switched solid-link fourth pole and British Standard B1–B3 fuse compatibility for industrial switching, isolation and protection.
£472.76
Why Choose the ABB OS250B22N2P Fuse Switch Disconnector?
The ABB OS250B22N2P is a robust 250 A, 4-pole fuse switch disconnector designed for reliable switching, isolation and fuse protection in industrial low-voltage electrical distribution systems. As part of the proven ABB OS switch fuse series, it provides dependable front-operated switching combined with British Standard fuse protection for demanding industrial applications. :chatgpt-content-reference{index="0"}
This model features a 22 operating mechanism positioned between the poles, a switched solid-link fourth pole on the right side and a front-operated configuration. The OS250B22N2P is designed for British Standard B1–B3 fuse links and is supplied with pistol handle and shaft included for convenient installation and operation. :chatgpt-content-reference{index="1"}
With a rated current of 250 A, a rated operational voltage of 690 V AC and AC-23A switching capability up to 250 kW, the OS250B22N2P provides dependable circuit isolation and fuse protection for industrial switchboards, machinery and power distribution systems. :chatgpt-content-reference{index="2"}
Key Advantages
- Heavy-duty 250 A fuse switch disconnector for industrial power systems.
- 4-pole configuration with switched solid-link fourth pole.
- 22 operating mechanism positioned between the poles.
- Compatible with British Standard B1–B3 fuse links.
- Pistol handle and shaft included for ready installation.
- Combines switching, isolation and fuse protection in one robust device.
Key Features
- ABB OS switch fuse series.
- 250 A rated current.
- 4-pole construction.
- Front-operated switch fuse arrangement.
- 22 operating mechanism between the poles.
- Switched fourth pole with solid link.
- Fourth pole positioned on the right side.
- British Standard fuse system.
- Suitable for B1, B2 and B3 fuse sizes.
- Top In – Bottom Out and Bottom In – Top Out line terminal positions.
- Base mounting construction.
- Lug terminal connections.
- Pistol handle and shaft included.
Reliable Switching, Isolation and Fuse Protection
Fuse switch disconnectors combine manual circuit switching and isolation with fuse-based protection against overcurrent and short-circuit conditions. This enables electrical circuits to be safely disconnected for maintenance while suitable fuse links protect connected equipment and conductors.
The ABB OS series is engineered for industrial electrical distribution where reliable switching performance, robust construction and flexible installation are required. The OS250B22N2P combines a 250 A rating, four-pole design and central operating mechanism for dependable operation in machinery, switchboards and industrial power systems. :chatgpt-content-reference{index="3"}
Typical Applications
- Industrial electrical distribution panels.
- Machinery and equipment isolation.
- Power feeder protection and switching.
- Industrial switchboards.
- Electrical control cabinets.
- OEM machinery and automation systems.
Technical Specifications
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| Mounting Type | Base / panel | |
|---|---|---|
| Series | OS Switch Fuses | |
| ABB order code | 1SCA022778R9940 | |
| Product type | Fuse switch disconnector | |
| Rated current | 250 A | |
| Number of poles | 4 | |
| Operation | Front operated | |
| Operating mechanism | 22 (between the poles) | |
| Fourth pole type | Switched with solid link | |
| Fourth pole position | Right side | |
| Fuse system | British Standard | |
| Fuse size | B1–B3 | |
| Rated operational voltage | 690 V AC | |
| Rated insulation voltage | 1000 V | |
| Rated impulse withstand voltage | 12 kV | |
| Rated short-time withstand current | 8 kA for 1 s | |
| Rated conditional short-circuit current | 80 kA at 690 V | |
| Rated operational power AC-23A | 75 kW at 220–240 V, 140 kW at 400 V, 145 kW at 415 V, 170 kW at 500 V, 250 kW at 690 V | |
| Mounting type | Base mounting | |
| Terminal type | Lug terminals | |
| Terminal width | 25 mm | |
| Tightening torque | 30–44 N·m | |
| Operating handle | Pistol handle included | |
| Shaft | Included | |
| Dimensions (H × W × D) | approx. 193 × 262 × 154 mm | |
| Weight | approx. 4.8 kg | |
| Protection rating | IP20 | |
| Standard | IEC 60947-3 |
Frequently Asked Questions
What is the ABB OS250B22N2P used for?
The OS250B22N2P is used for switching, isolation and fuse protection in industrial low-voltage electrical distribution systems.
What is the rated current of the ABB OS250B22N2P?
The ABB OS250B22N2P has a rated current of 250 A.
How many poles does the OS250B22N2P have?
The OS250B22N2P has a 4-pole configuration with a switched solid-link fourth pole.
Which fuse sizes are suitable for the OS250B22N2P?
The OS250B22N2P is designed for British Standard B1, B2 and B3 fuse links.
Are the handle and shaft included?
Yes. The OS250B22N2P is supplied with the pistol handle and shaft included.
Trusted Industrial Circuit Protection from ABB
ABB OS switch fuses provide dependable switching, isolation and fuse protection for industrial low-voltage electrical systems, supporting safe operation and reliable power distribution.
