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1SDA058936R1 ABB E1B/MS 1250 4P Fixed HR Switch-Disconnector
ABB 1SDA058936R1 is a SACE Emax E1B/MS 1250 A four-pole fixed switch-disconnector with horizontal rear terminals for reliable switching and isolation in low-voltage power distribution systems.
£8,349.72
Why Choose the ABB E1B/MS 1250 4P Fixed HR Switch-Disconnector?
The ABB E1B/MS 1250, order code 1SDA058936R1, is a SACE Emax switch-disconnector designed for reliable switching and isolation in low-voltage power distribution systems. It combines a 1250 A rated uninterrupted current with four-pole construction, fixed installation and horizontal rear terminals.
As part of the ABB SACE Emax E1B/MS series, this device provides switching and isolation rather than integral electronic overcurrent protection. Its B performance level and robust Emax construction make it suitable for industrial, commercial and infrastructure switchboards where circuit protection is coordinated separately.
The E1B/MS 1250 4P F HR configuration is rated for operation up to 690 V AC and provides a rated short-time withstand current of 42 kA for 1 s. Its four-pole fixed construction and rear flat horizontal terminals provide a practical solution for permanent switchboard installations requiring simultaneous switching of three phases and neutral.
Key Advantages
- High-current 1250 A SACE Emax switch-disconnector.
- Four-pole configuration for switching three phases and neutral.
- Fixed installation for permanent switchboard integration.
- Horizontal rear terminals facilitate rear busbar connections.
- Rated operational voltage up to 690 V AC.
- Provides 42 kA short-time withstand current for 1 s.
Key Features
- ABB SACE Emax E1B/MS series.
- 1250 A rated uninterrupted current.
- Four-pole (4P) construction.
- Fixed (F) execution.
- Rear flat horizontal (HR) terminals.
- B short-circuit performance level.
- 690 V AC / 250 V DC rated operational voltage.
- 1000 V rated insulation voltage.
- 12 kV rated impulse withstand voltage.
- Designed for high-current switching and isolation in low-voltage distribution systems.
Reliable Switching and Isolation for Power Distribution
Switch-disconnectors provide controlled switching and isolation of electrical circuits, allowing downstream equipment to be separated from the electrical supply for operation, inspection or maintenance. The ABB E1B/MS 1250 combines this function with the proven SACE Emax platform and substantial short-time current withstand capability for demanding low-voltage installations.
Its four-pole construction allows simultaneous switching of three phases and neutral where required by the system design. Fixed installation and horizontal rear terminals make the E1B/MS 1250 particularly suitable for permanent switchboard applications with rear busbar connections.
Typical Applications
- Low-voltage main distribution switchboards.
- Industrial power distribution systems.
- High-current feeder switching and isolation.
- Four-pole three-phase and neutral distribution systems.
- Manufacturing and process plant switchgear.
- Commercial and infrastructure electrical installations.
Technical Specifications
| Series | SACE Emax |
|---|---|
| Order code | 1SDA058936R1 |
| Product type | Switch-disconnector |
| Frame / sub-type | E1 |
| Performance level | B |
| Rated current (In) | 1250 A |
| Rated operational current (Ie) | 1250 A |
| Rated uninterrupted current (Iu) | 1250 A |
| Number of poles | 4P |
| 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) | 42 kA for 1 s / 36 kA for 3 s |
| Installation | Fixed (F) |
| Terminal arrangement | Rear flat horizontal (HR) |
| Power loss | 150 W |
| Electrical durability | 10,000 cycles |
| Mechanical durability | 25,000 cycles |
| Standard | IEC |
| Dimensions (W × H × D) | 386 × 418 × 302 mm |
| Product net weight | 50 kg |
| EAN | 8015644612955 |
Frequently Asked Questions
What is the ABB 1SDA058936R1?
It is an ABB SACE Emax E1B/MS 1250 switch-disconnector with a 1250 A rated uninterrupted current, four poles, fixed installation and horizontal rear terminals.
What is the rated current of the ABB E1B/MS 1250?
The switch-disconnector has a rated uninterrupted current of 1250 A.
How many poles does the ABB 1SDA058936R1 have?
This model has a four-pole (4P) configuration, making it suitable for systems requiring simultaneous switching of three phases and neutral.
What is the short-time withstand current of the E1B/MS 1250?
The device has a rated short-time withstand current of 42 kA for 1 s and 36 kA for 3 s.
What terminal arrangement does the ABB 1SDA058936R1 use?
The switch-disconnector uses rear flat horizontal (HR) terminals and is a fixed version intended for permanent installation in compatible low-voltage switchboards.
Trusted ABB SACE Emax Switching
ABB SACE Emax switch-disconnectors provide dependable high-current switching and isolation for low-voltage power distribution, combining robust electrical performance with practical configurations for industrial, commercial and infrastructure switchgear.
