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1SDA055859R1 ABB E2N 1250 PR122/P-LI 1250 A 3-Pole Fixed Air Circuit Breaker
ABB 1SDA055859R1 E2N 1250 PR122/P-LI is a 1250 A three-pole fixed SACE Emax air circuit breaker with horizontal rear terminals and a PR122/P-LI R1250 electronic trip unit providing long-time overload and instantaneous short-circuit protection.
£7,674.56
Why Choose the ABB E2N 1250 PR122/P-LI Air Circuit Breaker?
The ABB E2N 1250 PR122/P-LI, order code 1SDA055859R1, is a high-performance 1250 A three-pole fixed air circuit breaker designed for switching and overcurrent protection in low-voltage power distribution systems. Part of the ABB SACE Emax family, it combines robust high-current switching capability with a PR122/P-LI electronic overcurrent release for demanding industrial, commercial and infrastructure installations.
The PR122/P-LI R1250 electronic trip unit provides long-time overload and instantaneous short-circuit protection. This LI protection configuration helps safeguard cables, busbars and connected equipment against sustained overloads and severe short-circuit currents while providing reliable electronic protection for high-current distribution circuits.
With a rated uninterrupted current of 1250 A, a three-pole fixed configuration and horizontal rear terminals, the E2N 1250 is designed for permanent installation in compatible low-voltage switchboards. Its E2N performance level provides an ultimate short-circuit breaking capacity of 65 kA at 415 V AC and a short-time withstand current of 55 kA for 1 s.
Key Advantages
- Heavy-duty 1250 A air circuit breaker for low-voltage power distribution.
- PR122/P-LI electronic trip unit for dependable overcurrent protection.
- Provides long-time overload and instantaneous short-circuit protection.
- Three-pole fixed construction for permanent switchboard installation.
- 65 kA ultimate breaking capacity at 415 V AC.
- Horizontal rear terminals support integration with compatible switchboard busbar systems.
Key Features
- ABB SACE Emax E2N series.
- 1250 A rated uninterrupted current.
- Three-pole configuration.
- Fixed execution.
- PR122/P-LI R1250 electronic overcurrent release.
- Long-time overload protection.
- Instantaneous short-circuit protection.
- Horizontal rear terminals.
- 65 kA ultimate short-circuit breaking capacity at 415 V AC.
- 55 kA short-time withstand current for 1 s.
- Four auxiliary contacts.
- Open/closed circuit-breaker position indication.
Electronic Protection for High-Current Distribution Systems
The ABB SACE Emax E2N platform provides switching and electronic overcurrent protection for demanding low-voltage distribution circuits. The PR122/P trip technology monitors current conditions and initiates breaker operation when configured protection thresholds are exceeded, helping protect conductors, busbars and connected electrical equipment against damaging overcurrents.
The PR122/P-LI release combines long-time overload protection with instantaneous short-circuit protection. Together with the E2N's 65 kA breaking capability, 55 kA short-time withstand performance and fixed three-pole construction, the 1SDA055859R1 provides a robust solution for high-current switchboard protection.
Typical Applications
- Industrial low-voltage switchboards.
- Main power distribution panels.
- Manufacturing and process plants.
- Commercial and infrastructure electrical distribution.
- Transformer secondary distribution systems.
- High-current feeder and distribution circuit protection.
Technical Specifications
| Series | SACE Emax E2N |
|---|---|
| ABB order code | 1SDA055859R1 |
| EAN | 8015644571993 |
| Product type | Air circuit breaker |
| Frame / designation | E2N-12 |
| Rated uninterrupted current (Iu) | 1250 A |
| Number of poles | 3 |
| Execution | Fixed |
| Terminal arrangement | Horizontal rear terminals |
| Trip unit | PR122/P-LI R1250 |
| Trip unit type | Electronic |
| Protection functions | LI – long-time overload and instantaneous short-circuit protection |
| Rated ultimate short-circuit breaking capacity (Icu) at 415 V AC | 65 kA |
| Rated short-time withstand current (Icw) | 55 kA for 1 s |
| Auxiliary contacts | 4 |
| Position indication | Circuit breaker open / closed |
| Weight | 55 kg |
Frequently Asked Questions
What is the ABB 1SDA055859R1 used for?
It is a 1250 A three-pole fixed air circuit breaker designed for switching and overcurrent protection in low-voltage power distribution systems.
What is the rated current of the ABB E2N 1250 PR122/P-LI?
The circuit breaker has a rated uninterrupted current of 1250 A.
What protection functions does the PR122/P-LI provide?
The PR122/P-LI R1250 electronic release provides long-time overload and instantaneous short-circuit protection.
Is the ABB 1SDA055859R1 fixed or withdrawable?
This model is a three-pole fixed air circuit breaker with horizontal rear terminals for permanent installation in a compatible low-voltage switchboard.
What is the short-circuit performance of the ABB E2N 1250?
The E2N 1250 has a rated ultimate short-circuit breaking capacity of 65 kA at 415 V AC and a rated short-time withstand current of 55 kA for 1 s.
Trusted ABB Power Distribution Technology
ABB SACE Emax air circuit breakers combine robust high-current switching with electronic protection technology for dependable operation in demanding industrial, commercial and infrastructure low-voltage distribution systems.
