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1SDA055741R1 ABB E1N1250 PR122/P-LSIG 1250A 4P Fixed Air Circuit Breaker
ABB 1SDA055741R1 SACE Emax E1N1250 four-pole fixed air circuit breaker rated at 1250 A with a PR122/P-LSIG electronic trip unit providing comprehensive LSIG protection for low-voltage power distribution.
£11,209.12
Why Choose the ABB E1N1250 PR122/P-LSIG 1250A 4P Fixed Air Circuit Breaker?
The ABB E1N1250 PR122/P-LSIG, order code 1SDA055741R1, is a high-performance SACE Emax air circuit breaker designed for switching and comprehensive protection in low-voltage power distribution systems. Rated at 1250 A, this four-pole breaker combines the E1N frame with the PR122/P-LSIG electronic overcurrent release.
This model is supplied in a fixed four-pole configuration, making it suitable for permanent installation in industrial, commercial and infrastructure low-voltage switchboards. Its four-pole construction allows the neutral conductor to be switched and isolated together with the three phase conductors where required by the distribution system.
The PR122/P-LSIG electronic trip unit provides long-time overload, short-time short-circuit, instantaneous short-circuit and ground-fault protection. This comprehensive LSIG protection helps safeguard cables, busbars and connected equipment while supporting selective protection strategies in demanding power distribution installations.
Key Advantages
- High-performance ABB SACE Emax E1N air circuit breaker.
- 1250 A rated current for high-current low-voltage distribution.
- Four-pole fixed configuration supports neutral switching and isolation.
- Advanced PR122/P-LSIG electronic overcurrent release.
- Comprehensive LSIG protection against overloads, short circuits and ground faults.
- E1N performance class for demanding power distribution applications.
- Fixed construction provides a robust solution for permanent switchboard installations.
Key Features
- ABB SACE Emax E1N series.
- 1250 A rated current.
- Four-pole (4P) construction.
- Fixed (F) circuit-breaker configuration.
- PR122/P-LSIG electronic trip unit.
- Long-time overload protection.
- Short-time short-circuit protection.
- Instantaneous short-circuit protection.
- Ground-fault protection.
- Suitable for high-current low-voltage power distribution.
- Designed for integration into industrial and commercial switchboards.
Comprehensive Protection for High-Current Power Distribution
The ABB SACE Emax E1N1250 is engineered for switching, isolation and protection of high-current low-voltage distribution circuits. Its fixed four-pole construction is well suited to permanent switchboard installations where switching and isolation of the neutral conductor are required alongside the phase conductors.
The PR122/P-LSIG electronic release provides coordinated protection against overloads, delayed and instantaneous short circuits and ground faults. Combined with the proven E1N platform, the 1SDA055741R1 provides dependable protection for critical incomers, feeders and other high-current distribution circuits.
Typical Applications
- Industrial low-voltage switchboards.
- Main incoming circuit protection.
- High-current feeder protection.
- Three-phase systems requiring neutral switching.
- Manufacturing and process plants.
- Commercial building power distribution.
- Infrastructure and utility distribution systems.
Technical Specifications
| Series | SACE Emax |
|---|---|
| Product group | New Emax |
| Order code | 1SDA055741R1 |
| Product type | Air circuit breaker |
| Frame / sub-type | E1N |
| Rated current | 1250 A |
| Number of poles | 4P |
| Version | Fixed |
| Trip unit | PR122/P-LSIG |
| Release type | Electronic |
| Protection functions | Long-time, short-time, instantaneous and ground fault (LSIG) |
| Current type | AC |
| Application | Low-voltage power distribution |
Frequently Asked Questions
What is the ABB 1SDA055741R1?
It is an ABB SACE Emax E1N1250 1250 A four-pole fixed air circuit breaker equipped with a PR122/P-LSIG electronic overcurrent release.
What is the rated current of the ABB E1N1250 1SDA055741R1?
The circuit breaker has a rated current of 1250 A.
What protection does the PR122/P-LSIG trip unit provide?
The PR122/P-LSIG provides long-time overload, short-time short-circuit, instantaneous short-circuit and ground-fault protection, collectively identified as LSIG protection.
How many poles does the ABB 1SDA055741R1 have?
The 1SDA055741R1 is a four-pole (4P) air circuit breaker, allowing the neutral conductor to be switched together with the three phase conductors where required.
Is the ABB 1SDA055741R1 fixed or withdrawable?
The 1SDA055741R1 is a fixed air circuit breaker intended for permanent installation within a compatible low-voltage switchboard.
Trusted by Power Distribution Professionals Worldwide
ABB SACE Emax air circuit breakers combine high-current switching capability with advanced electronic protection, providing dependable solutions for demanding industrial, commercial and infrastructure low-voltage distribution systems.
