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1SDA055973R1 ABB E2S 1250 PR122/P-LSIG 1250A 3-Pole Withdrawable Air Circuit Breaker Moving Part
ABB 1SDA055973R1 is a SACE Emax E2S 1250 A three-pole withdrawable air circuit breaker moving part with a PR122/P-LSIG electronic overcurrent release for comprehensive high-performance low-voltage power distribution protection.
£9,784.34
Why Choose the ABB 1SDA055973R1 E2S 1250 Air Circuit Breaker?
The ABB 1SDA055973R1 is a SACE Emax E2S 1250 withdrawable air circuit breaker moving part designed for dependable switching and comprehensive protection in demanding low-voltage power distribution systems. This three-pole unit combines a 1250 A rated uninterrupted current with ABB's PR122/P-LSIG electronic overcurrent release, providing configurable protection for industrial, commercial and infrastructure electrical installations.
As part of the ABB SACE Emax range, the E2S 1250 provides high short-circuit performance for installations with substantial prospective fault currents. The PR122/P-LSIG release provides long-time, short-time, instantaneous and earth-fault protection functions, helping protect switchgear, conductors and connected equipment against overload, short-circuit and earth-fault conditions.
This model is supplied as the moving part of a three-pole withdrawable circuit breaker. It has a rated uninterrupted current of 1250 A, a rated voltage of 690 V and an ultimate short-circuit breaking capacity of 85 kA at 400 V AC, 50 Hz, making it a capable solution for high-performance low-voltage switchboard applications.
Key Advantages
- High-performance 1250 A air circuit breaker moving part for demanding low-voltage distribution systems.
- 85 kA ultimate short-circuit breaking capacity at 400 V AC, 50 Hz.
- Three-pole withdrawable construction supports serviceable switchboard installations.
- Advanced PR122/P-LSIG electronic overcurrent release.
- LSIG functionality provides long-time, short-time, instantaneous and earth-fault protection.
- Fitted with four change-over auxiliary contacts for signalling and control.
Key Features
- ABB SACE Emax E2S 1250 circuit breaker moving part.
- 1250 A rated uninterrupted current.
- Three-pole circuit breaker configuration.
- Withdrawable (W) moving part.
- PR122/P-LSIG R1250 electronic trip unit.
- Long-time overload protection.
- Short-time and instantaneous short-circuit protection.
- Integrated earth-fault protection.
- Four change-over auxiliary contacts.
- Circuit-breaker open/closed position indication.
Comprehensive LSIG Protection for High-Performance Distribution
Air circuit breakers such as the ABB SACE Emax E2S provide switching, isolation and automatic overcurrent protection for high-current low-voltage distribution circuits. The electronic trip unit monitors electrical conditions and initiates breaker operation when configured protection thresholds are exceeded, helping protect switchgear, conductors and connected equipment against damaging overload, short-circuit and earth-fault currents.
The PR122/P-LSIG release gives this E2S 1250 long-time, short-time, instantaneous and earth-fault protection capabilities for coordinated electrical protection. Combined with its 1250 A rating, three-pole arrangement, withdrawable construction and 85 kA breaking capacity at 400 V AC, the ABB 1SDA055973R1 is well suited to demanding switchboards where high fault performance and maintainability are required.
Typical Applications
- Industrial low-voltage switchboards and distribution panels.
- Main incoming circuit protection.
- High-current three-phase distribution feeders.
- Transformer secondary circuit protection.
- Manufacturing and process facilities.
- Commercial buildings and infrastructure power distribution.
- Installations with high prospective short-circuit currents.
Technical Specifications
| Series | SACE Emax |
|---|---|
| ABB order code / MPN | 1SDA055973R1 |
| ABB product group | 310513-New Emax |
| Product type | Air circuit breaker moving part |
| Frame | E2S 1250 |
| Rated current (In) | 1250 A |
| Rated uninterrupted current (Iu) | 1250 A |
| Number of poles | 3 |
| Version | Withdrawable (W) moving part |
| Trip unit | PR122/P-LSIG R1250 |
| Release type | Electronic |
| Protection functions | Long-time, short-time, instantaneous and earth-fault (LSIG) |
| Overload release setting range | 500–1250 A |
| Instantaneous short-circuit release setting range | 1875–18750 A |
| Rated voltage | 690 V |
| Ultimate short-circuit breaking capacity (Icu) at 400 V AC, 50 Hz | 85 kA |
| Integrated earth-fault protection | Yes |
| Auxiliary contacts | 4 change-over contacts |
| Position indication | Circuit breaker open / closed |
| Motor drive integrated | No |
| Motor drive optional | Yes |
| Mechanical durability | 25,000 cycles |
| Electrical durability at ≤440 V | 15,000 cycles |
| Electrical durability at 500–690 V | 15,000 cycles |
| Product net dimensions (W × H × D) | 324 × 461 × 396.5 mm |
| Product net weight | 49 kg |
| EAN | 8015644573133 |
Frequently Asked Questions
What is the ABB 1SDA055973R1?
The ABB 1SDA055973R1 is the moving part of a SACE Emax E2S 1250 three-pole withdrawable air circuit breaker, rated at 1250 A and equipped with a PR122/P-LSIG electronic overcurrent release.
What protection functions does the PR122/P-LSIG release provide?
The PR122/P-LSIG provides long-time, short-time, instantaneous and earth-fault protection, collectively identified as LSIG protection.
What is the breaking capacity of the ABB E2S 1250?
The E2S 1250 provides an ultimate short-circuit breaking capacity of 85 kA at 400 V AC, 50 Hz, making it suitable for demanding distribution systems with high prospective fault currents.
Is the ABB 1SDA055973R1 fixed or withdrawable?
The ABB 1SDA055973R1 is a withdrawable (W) version supplied as the moving part of the E2S 1250 circuit breaker system.
Does the ABB 1SDA055973R1 provide earth-fault protection?
Yes. The PR122/P-LSIG electronic release incorporates earth-fault protection in addition to long-time, short-time and instantaneous overcurrent protection.
What auxiliary contacts are fitted to the ABB 1SDA055973R1?
The circuit breaker moving part is fitted with four change-over auxiliary contacts and includes circuit-breaker open/closed position indication.
Trusted by Electrical Professionals Worldwide
ABB SACE Emax air circuit breakers are engineered for dependable switching and protection in demanding low-voltage power distribution systems, supporting industrial, commercial and infrastructure installations where reliable high-current circuit protection is essential.
