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1SCA102254R1001 ABB 400 A 3-Pole Back-In Back-Out Switch Fuse
ABB OS400B12BBP (1SCA102254R1001) is a 400 A three-pole BS 88-2 switch fuse with a front-operated mechanism between the poles and specialised back-in/back-out connections for demanding industrial low-voltage power distribution.
£741.79
Why Choose the ABB OS400B12BBP Switch Fuse?
The ABB OS400B12BBP, product ID 1SCA102254R1001, is a heavy-duty 400 A three-pole special-connected switch fuse designed for switching, electrical isolation and fuse protection in demanding industrial low-voltage power distribution systems. Part of the ABB OS Fuse Switches range, it combines high-current load switching with the protection provided by correctly selected British Standard fuse links.
The OS400B12BBP features a specialised back-in/back-out connection arrangement, allowing both incoming and outgoing power connections to be routed from the rear of the device. Its front-operated mechanism is positioned between the poles, providing a purpose-designed configuration for switchboards where rear power connections and front operation are required.
Rated at 400 A for AC-20 to AC-23 duties at up to 690 V AC, the OS400B12BBP is designed for BS 88-2 B1–B4 fuse links. It provides AC-23A operational power ratings of 230 kW at 415 V, 280 kW at 500 V and 355 kW at 690 V, while the supplied operating handle, shaft and terminal bolt kit provide the principal operating components required for enclosure integration.
Key Advantages
- Heavy-duty 400 A switch fuse for high-current industrial applications.
- Three-pole configuration for three-phase power distribution.
- Specialised back-in/back-out connection arrangement for rear cable or busbar routing.
- Front-operated mechanism positioned between the poles.
- Designed for BS 88-2 B1–B4 fuse links.
- Operating handle, adjustable shaft and terminal bolt kit supplied as standard.
- Combines load switching, electrical isolation and fuse protection in one device.
- Suitable for demanding switchboards, feeder circuits and industrial power distribution systems.
Key Features
- ABB OS Fuse Switches series.
- 400 A rated operational current.
- Three-pole construction.
- Front-operated design.
- Operating mechanism located between the poles.
- Back-in/back-out power connection arrangement.
- British Standard BS 88-2 fuse system.
- Compatible with B1–B4 fuse links.
- Maximum applicable fuse body diameter of 62 mm.
- Rated for AC-20 to AC-23 duties at up to 690 V AC.
- 230 kW AC-23A rating at 415 V.
- 280 kW AC-23A rating at 500 V.
- 355 kW AC-23A rating at 690 V.
- Handle, shaft and terminal bolt kit included as standard.
Reliable Back-Connected Fuse Switch Protection
Switch fuses combine manual load switching and electrical isolation with the overcurrent and short-circuit protection provided by correctly selected fuse links. This enables downstream equipment and distribution circuits to be isolated when required while BS 88-2 fuse links provide protection against electrical fault conditions.
The ABB OS range includes specialised connection configurations for switchboards where conventional top or bottom connections are unsuitable. The OS400B12BBP combines a 400 A three-pole configuration, mechanism-between-poles operation and back-in/back-out connections, making it particularly suitable for high-current assemblies where both incoming and outgoing conductors or busbars need to be routed behind the switch fuse.
Typical Applications
- Industrial low-voltage distribution boards.
- High-current electrical switchboards.
- Three-phase feeder switching, isolation and fuse protection.
- Industrial machinery and equipment power supplies.
- Power distribution assemblies requiring rear connections.
- Panel designs requiring back-in/back-out conductor or busbar routing.
Technical Specifications
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| Mounting Type | Base / panel | |
|---|---|---|
| Series | OS Fuse Switches | |
| Product ID | 1SCA102254R1001 | |
| ABB product group | 311021-OS Fuse Switches | |
| Product type | Special-connected switch fuse | |
| Rated operational current | 400 A | |
| Number of poles | 3 | |
| Fuse standard | BS 88-2 | |
| Fuse size | B1–B4 | |
| Maximum fuse body diameter | 62 mm | |
| Rated operational voltage | up to 690 V AC | |
| Rated insulation voltage | 1000 V | |
| Rated impulse withstand voltage | 12 kV | |
| Rated operational power AC-23A at 415 V | 230 kW | |
| Rated operational power AC-23A at 500 V | 280 kW | |
| Rated operational power AC-23A at 690 V | 355 kW | |
| Connection arrangement | Back in / back out | |
| Connection designation | BB | |
| Operation | Front operated | |
| Mechanism position | Between the poles | |
| Mechanism designation | 12 | |
| Mounting | Base mounting | |
| Terminal type | Lug terminals | |
| Terminal width | 25 mm | |
| Operating shaft | OXP12X250 included | |
| Operating handle | OHB95J12 included | |
| Terminal bolts | M10×30 included | |
| Standard | IEC 60947-3 | |
| Product dimensions | 255 mm × 194 mm × 221 mm | |
| Product net weight | 6.5 kg |
Frequently Asked Questions
What is the ABB OS400B12BBP used for?
The ABB OS400B12BBP is a 400 A three-pole switch fuse designed for switching, electrical isolation and fuse protection in demanding low-voltage power distribution systems, particularly where rear incoming and outgoing connections are required.
What connection arrangement does the ABB OS400B12BBP use?
The OS400B12BBP uses a specialised back-in/back-out connection arrangement, identified by ABB's BB designation, with both incoming and outgoing power connections routed from the rear.
Which fuse links are compatible with the ABB OS400B12BBP?
The OS400B12BBP is designed for BS 88-2 B1–B4 fuse links, with a maximum applicable fuse body diameter of 62 mm.
What are the power ratings of the ABB OS400B12BBP?
The OS400B12BBP provides AC-23A operational power ratings of 230 kW at 415 V, 280 kW at 500 V and 355 kW at 690 V.
Does the ABB OS400B12BBP include a handle and shaft?
Yes. The OS400B12BBP is supplied with an OXP12X250 operating shaft and OHB95J12 operating handle, together with the required M10×30 terminal bolt kit.
Trusted by Electrical Professionals Worldwide
ABB OS fuse switches provide dependable switching, electrical isolation and fuse protection for demanding low-voltage power distribution applications, with specialised connection configurations such as the OS400B12BBP back-in/back-out arrangement supporting flexible high-current switchboard and industrial distribution designs.
