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1SDA058943R1 ABB E1B/MS 1250 3P W MP Switch Disconnector 1250 A
ABB 1SDA058943R1 E1B/MS 1250 is a 1250 A three-pole withdrawable SACE Emax switch-disconnector moving part designed for reliable low-voltage power distribution and isolation.
£6,619.73
Why Choose the ABB E1B/MS 1250 3P W MP Switch Disconnector?
The ABB E1B/MS 1250 3P W MP, order code 1SDA058943R1, is a SACE Emax air switch disconnector moving part designed for high-current switching and isolation in low-voltage power distribution systems. This three-pole E1 frame device has a rated uninterrupted current of 1250 A and forms the moving part of a withdrawable SACE Emax installation.
The E1B/MS 1250 combines ABB's withdrawable Emax architecture with a B short-circuit performance level. It provides a rated short-time withstand current of 42 kA for 1 s and 36 kA for 3 s, supporting dependable isolation in industrial and commercial distribution systems where substantial prospective fault currents may be present.
Rated for operation up to 690 V AC or 250 V DC, with a rated insulation voltage of 1000 V and rated impulse withstand voltage of 12 kV, the E1B/MS 1250 provides robust electrical performance for demanding switchboard applications. Its withdrawable moving-part format facilitates servicing and replacement when installed with the corresponding fixed part.
Key Advantages
- High-current 1250 A SACE Emax switch disconnector for power distribution and isolation.
- Three-pole withdrawable construction supports service-friendly switchboard design.
- Supplied as the moving part for a compatible SACE Emax withdrawable assembly.
- Rated for operation up to 690 V AC or 250 V DC.
- 42 kA short-time withstand current for 1 s.
- High electrical and mechanical endurance for dependable industrial service.
Key Features
- ABB SACE Emax E1B/MS series.
- 1250 A rated uninterrupted current.
- Three-pole (3P) construction.
- Withdrawable (W) moving part (MP) configuration.
- 690 V AC / 250 V DC rated operational voltage.
- 1000 V rated insulation voltage.
- 12 kV rated impulse withstand voltage.
- B short-circuit performance level.
- Designed for use with the corresponding fixed part of the SACE Emax withdrawable assembly.
- IEC-standard SACE Emax construction for low-voltage power distribution.
Reliable High-Current Isolation for Power Distribution
The ABB E1B/MS is designed to provide controlled switching and isolation rather than the overcurrent protection functions associated with a conventional circuit breaker. This makes it suitable for installations where protection is provided separately and a robust high-current isolating device is required for operational switching, maintenance and circuit segregation.
Its withdrawable SACE Emax construction provides a significant maintenance advantage because the moving part can be removed from its corresponding fixed section. Combined with its 1250 A current rating, three-pole construction and 42 kA one-second withstand capability, the E1B/MS 1250 is well suited to demanding industrial and infrastructure power distribution assemblies.
Typical Applications
- Industrial low-voltage power distribution switchboards.
- Main incoming and distribution isolation.
- Withdrawable switchgear assemblies.
- Industrial plants and manufacturing facilities.
- Commercial and infrastructure power distribution systems.
- High-current feeder and busbar isolation.
Technical Specifications
| Series | SACE Emax / New Emax E1 |
|---|---|
| ABB order code | 1SDA058943R1 |
| Product type | Air switch disconnector moving part |
| Frame / subtype | E1 |
| Short-circuit performance level | B |
| Rated current (In) | 1250 A |
| Rated operational current (Ie) | 1250 A |
| Rated uninterrupted current (Iu) | 1250 A |
| Number of poles | 3P |
| Current type | AC |
| Rated operational voltage | 690 V AC / 250 V DC |
| Rated voltage (Ur) | 690 V |
| Rated insulation voltage (Ui) | 1000 V |
| Rated impulse withstand voltage (Uimp) | 12 kV |
| Rated short-time withstand current (Icw), 1 s | 42 kA |
| Rated short-time withstand current (Icw), 3 s | 36 kA |
| Installation version | Withdrawable |
| Configuration | Moving part |
| Electrical durability | 10,000 cycles |
| Electrical operating frequency | 30 cycles per hour |
| Mechanical durability | 25,000 cycles |
| Mechanical operating frequency | 60 cycles per hour |
| Power loss | 230 W |
| Product width | 324 mm |
| Product height | 461 mm |
| Product depth | 396.5 mm |
| Product net weight | 44 kg |
| Standard | IEC |
| EAN | 8015644613020 |
Frequently Asked Questions
What is the ABB 1SDA058943R1?
The ABB 1SDA058943R1 is an E1B/MS 1250 SACE Emax three-pole withdrawable switch-disconnector moving part rated at 1250 A.
What is the rated current of the E1B/MS 1250?
The E1B/MS 1250 has a rated uninterrupted current of 1250 A.
What voltage can the ABB E1B/MS 1250 operate at?
The switch disconnector is rated for operation up to 690 V AC or 250 V DC, with a rated insulation voltage of 1000 V.
What does 3P W MP mean in the product designation?
3P identifies the three-pole construction, while W MP denotes the withdrawable moving-part version designed for use with the corresponding fixed part of the SACE Emax assembly.
What is the short-time withstand rating of the E1B/MS 1250?
The E1B/MS 1250 has a rated short-time withstand current of 42 kA for 1 s and 36 kA for 3 s.
Trusted ABB Power Distribution Technology
ABB SACE Emax switch disconnectors provide dependable high-current switching and isolation for low-voltage distribution systems, combining proven Emax construction with service-friendly withdrawable design and robust electrical endurance.
