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1SDA055728R1 ABB E1N 1250 PR121/P-LI 1250 A 3-Pole Fixed Air Circuit Breaker
ABB 1SDA055728R1 is a SACE Emax E1N 1250 A three-pole fixed air circuit breaker with horizontal rear terminals and a PR121/P-LI electronic overcurrent release providing long-time and instantaneous protection for low-voltage power distribution systems.
£7,436.69
Why Choose the ABB 1SDA055728R1 E1N 1250 Air Circuit Breaker?
The ABB 1SDA055728R1 is a high-performance SACE Emax E1N 1250 air circuit breaker designed for dependable switching and protection in low-voltage power distribution systems. Rated at 1250 A, this three-pole fixed circuit breaker incorporates a PR121/P-LI electronic overcurrent release for long-time overload and instantaneous short-circuit protection.
As part of the proven ABB SACE Emax range, the E1N 1250 combines robust high-current switching capability with electronic protection for demanding industrial, commercial and infrastructure installations. The PR121/P-LI release provides LI protection functions, helping protect cables, busbars and connected equipment against sustained overloads and severe short-circuit currents.
This configuration features a three-pole fixed design with horizontal rear terminals and a rated current of 1250 A. The fixed construction is suited to permanent installation within compatible low-voltage switchboards, while the E1N performance level provides the robust fault interruption required in high-current distribution applications.
Key Advantages
- Heavy-duty 1250 A SACE Emax air circuit breaker for low-voltage distribution.
- Three-pole fixed configuration for permanent switchboard installations.
- Electronic PR121/P-LI overcurrent release for dependable circuit protection.
- LI functionality provides long-time overload and instantaneous short-circuit protection.
- Horizontal rear terminals support practical integration with switchboard busbar systems.
- ABB E1N performance level is designed for demanding industrial and commercial distribution duties.
Key Features
- ABB SACE Emax E1N 1250 circuit breaker platform.
- 1250 A rated current.
- Three-pole configuration.
- Fixed (F) execution.
- Horizontal rear (HR) terminal arrangement.
- PR121/P-LI electronic overcurrent release.
- Long-time overload protection.
- Instantaneous short-circuit protection.
- Designed for high-current low-voltage AC distribution.
- ABB order code 1SDA055728R1.
Reliable Protection for High-Current Low-Voltage Distribution
Air circuit breakers such as the ABB SACE Emax E1N are designed to switch and protect high-current low-voltage distribution circuits. The electronic overcurrent release supervises circuit current so the breaker can respond to abnormal conditions before sustained overloads or severe short circuits cause extensive damage to conductors, busbars and connected electrical equipment.
The PR121/P-LI release provides long-time overload and instantaneous short-circuit protection. Combined with the 1250 A E1N platform, three-pole fixed construction and horizontal rear terminals, this makes the ABB 1SDA055728R1 particularly suitable for main distribution and feeder applications requiring dependable high-current circuit protection.
Typical Applications
- Main low-voltage switchboards and distribution boards.
- Industrial power distribution systems.
- Commercial and infrastructure electrical installations.
- Main incomer and high-current feeder protection.
- Manufacturing and process plant switchgear.
- Fixed switchgear requiring electronic LI overcurrent protection.
Technical Specifications
| Series | SACE Emax |
|---|---|
| Frame | E1N 1250 |
| Order code | 1SDA055728R1 |
| Product type | Air circuit breaker |
| Rated current (In) | 1250 A |
| Number of poles | 3 |
| Execution | Fixed (F) |
| Terminal arrangement | Horizontal rear (HR) |
| Trip unit | PR121/P-LI |
| Release type | Electronic overcurrent release |
| Protection functions | Long-time and instantaneous (LI) |
| Current type | AC |
| ABB product group | 310513-New Emax |
Frequently Asked Questions
What is the ABB 1SDA055728R1?
The ABB 1SDA055728R1 is a SACE Emax E1N 1250 three-pole fixed air circuit breaker rated at 1250 A and equipped with a PR121/P-LI electronic overcurrent release.
What is the current rating of the ABB 1SDA055728R1?
The ABB 1SDA055728R1 has a rated current of 1250 A.
What protection functions does the PR121/P-LI trip unit provide?
The PR121/P-LI electronic release provides long-time overload protection and instantaneous short-circuit protection.
How many poles does the ABB 1SDA055728R1 have?
The ABB 1SDA055728R1 has a three-pole configuration for three-phase low-voltage power distribution applications.
Is the ABB 1SDA055728R1 fixed or withdrawable?
The ABB 1SDA055728R1 is a fixed (F) air circuit breaker designed for permanent installation within compatible low-voltage switchgear.
What terminal arrangement does the ABB 1SDA055728R1 use?
The ABB 1SDA055728R1 uses horizontal rear (HR) terminals, providing a rear connection arrangement for integration into compatible switchboards.
Trusted by Electrical Engineers Worldwide
ABB SACE Emax air circuit breakers are engineered for reliable switching and protection in demanding low-voltage power distribution systems, combining robust construction and electronic overcurrent protection for industrial, commercial and infrastructure applications.
