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1SDA055953R1 ABB E2S 1250 PR121/P-LSI 1250 A 3-Pole Fixed Air Circuit Breaker
ABB 1SDA055953R1 is a SACE Emax E2S 1250 A three-pole fixed air circuit breaker with horizontal rear terminals and a PR121/P-LSI electronic overcurrent release for high-performance low-voltage power distribution protection.
£8,371.58
Why Choose the ABB E2S 1250 PR121/P-LSI 1SDA055953R1 Air Circuit Breaker?
The ABB 1SDA055953R1 is a high-performance SACE Emax E2S 1250 air circuit breaker (ACB) designed for reliable switching, isolation and protection in demanding low-voltage electrical distribution systems. Part of the ABB SACE Emax E2 series, this three-pole fixed circuit breaker is equipped with a PR121/P-LSI electronic overcurrent release for dependable circuit protection.
With a rated uninterrupted current of 1250 A, the E2S 1250 is suitable for industrial switchboards, commercial power distribution, transformer protection and other high-current applications. The PR121/P-LSI electronic trip unit provides long-time overload, short-time short-circuit and instantaneous short-circuit protection, allowing the breaker to respond effectively to a range of electrical fault conditions.
The E2S performance level provides a rated ultimate short-circuit breaking capacity of 85 kA at 415 V AC and a rated short-time withstand current of 65 kA for 1 s. This version is supplied as a three-pole fixed circuit breaker with horizontal rear terminals, providing a robust solution for permanent installation within compatible low-voltage switchgear.
Key Advantages
- Heavy-duty 1250 A air circuit breaker for low-voltage power distribution.
- 85 kA ultimate short-circuit breaking capacity at 415 V AC.
- 65 kA short-time withstand current for 1 s.
- PR121/P-LSI electronic overcurrent release for advanced circuit protection.
- LSI functionality provides overload, short-time and instantaneous short-circuit protection.
- Three-pole fixed configuration for permanent switchboard installations.
- Part of the proven ABB SACE Emax E2S air circuit breaker platform.
Key Features
- ABB SACE Emax E2S 1250 series.
- 1250 A rated uninterrupted current.
- Three-pole configuration.
- Fixed execution.
- Horizontal rear terminals.
- PR121/P-LSI electronic trip unit.
- Long-time overload protection.
- Short-time delayed short-circuit protection.
- Instantaneous short-circuit protection.
- 85 kA Icu at 415 V AC.
- 65 kA Icw for 1 s.
- Designed for high-performance low-voltage distribution systems.
High-Performance Protection for Power Distribution
Air circuit breakers such as the ABB SACE Emax E2S provide switching, isolation and fault protection for high-current low-voltage distribution circuits. The E2S 1250 combines a substantial continuous-current rating with high short-circuit breaking performance, making it particularly suitable for main switchboards and industrial distribution systems where reliable interruption of significant fault currents is essential.
The PR121/P-LSI electronic trip unit provides protection against long-time overload, short-time short-circuit and instantaneous short-circuit conditions. Combined with the fixed Emax construction and horizontal rear terminals, the 1SDA055953R1 provides a dependable solution for permanent installations requiring high-performance electronic circuit protection.
Typical Applications
- Main low-voltage electrical distribution switchboards.
- Industrial power distribution systems.
- Transformer protection and distribution.
- Generator and utility distribution systems.
- Manufacturing and process plant switchgear.
- Commercial building electrical infrastructure.
- High-fault-level electrical distribution installations.
Technical Specifications
| Product family | SACE Emax |
|---|---|
| Series | E2S |
| ABB order code | 1SDA055953R1 |
| Product group | 310513-New Emax |
| Product type | Air circuit breaker |
| Rated uninterrupted current (Iu) | 1250 A |
| Number of poles | 3 |
| Execution | Fixed |
| Terminal arrangement | Horizontal rear terminals (HR) |
| Trip unit | PR121/P-LSI |
| Protection functions | LSI – long-time, short-time and instantaneous protection |
| Short-circuit performance level | S |
| Rated ultimate short-circuit breaking capacity (Icu) at 415 V AC | 85 kA |
| Rated short-time withstand current (Icw), 1 s | 65 kA |
| Current type | AC |
| Mounting type | Fixed switchboard installation |
Frequently Asked Questions
What is the ABB 1SDA055953R1 used for?
The ABB 1SDA055953R1 is a 1250 A three-pole air circuit breaker designed for switching, isolation and protection in demanding low-voltage electrical distribution systems.
What is the current rating of the ABB E2S 1250 1SDA055953R1?
The circuit breaker has a rated uninterrupted current of 1250 A, making it suitable for high-current industrial and commercial power distribution applications.
What protection does the PR121/P-LSI trip unit provide?
The PR121/P-LSI electronic trip unit provides LSI protection functions covering long-time overload, short-time short-circuit and instantaneous short-circuit conditions.
What is the short-circuit breaking capacity of the E2S 1250?
The E2S 1250 has a rated ultimate short-circuit breaking capacity of 85 kA at 415 V AC and a rated short-time withstand current of 65 kA for 1 s.
Is the ABB 1SDA055953R1 fixed or withdrawable?
The ABB 1SDA055953R1 is a three-pole fixed air circuit breaker with horizontal rear terminals for permanent installation within compatible low-voltage switchgear.
Trusted for Industrial Power Distribution
ABB SACE Emax air circuit breakers are engineered to provide dependable switching, isolation and electronic protection in demanding low-voltage power distribution systems, making the E2S 1250 a robust solution for industrial, commercial and infrastructure installations.
