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1SDA056057R1 ABB E2L1250 PR121/P-LSI 1250A 4P Fixed Air Circuit Breaker
ABB 1SDA056057R1 is a SACE Emax E2L 1250 four-pole 1250 A fixed air circuit breaker with rear horizontal terminals and a PR121/P-LSI R1250 electronic overcurrent release for high-current low-voltage circuit protection.
£10,986.92
Why Choose the ABB E2L1250 PR121/P-LSI 1250A 4P Fixed Air Circuit Breaker?
The ABB E2L1250 PR121/P-LSI, order code 1SDA056057R1, is a high-performance SACE Emax air circuit breaker designed for switching and protection in demanding low-voltage power distribution systems. As part of the ABB SACE Emax E2L series, this four-pole fixed circuit breaker is rated at 1250 A and incorporates the PR121/P-LSI R1250 electronic overcurrent release.
The PR121/P-LSI trip unit provides long-time overload (L), short-time short-circuit (S) and instantaneous short-circuit (I) protection. This combination provides coordinated protection against sustained overloads and short-circuit faults, helping safeguard cables, busbars, switchgear and connected equipment in high-current electrical distribution systems.
This E2L1250 configuration features a four-pole fixed execution with rear horizontal terminals. Its 1250 A current rating, LSI electronic protection and high-performance E2L breaker platform make it well suited to industrial, commercial and infrastructure switchboards requiring reliable high-current protection.
Key Advantages
- High-performance 1250 A SACE Emax air circuit breaker.
- Advanced PR121/P electronic overcurrent release for dependable circuit protection.
- LSI protection against long-time overload, short-time short-circuit and instantaneous short-circuit conditions.
- Four-pole configuration suitable for three-phase distribution systems incorporating a neutral conductor.
- Fixed execution with rear horizontal terminals for permanent switchboard installation.
- Part of ABB's established SACE Emax E2L high-performance air circuit breaker range.
Key Features
- ABB SACE Emax E2L 1250 air circuit breaker.
- 1250 A rated current.
- Four-pole configuration.
- PR121/P-LSI R1250 electronic overcurrent release.
- Long-time overload protection (L).
- Short-time short-circuit protection (S).
- Instantaneous short-circuit protection (I).
- Fixed circuit breaker execution.
- Rear horizontal terminals.
- Fitted with four auxiliary contacts and open/closed position indication.
Advanced Protection for High-Current Power Distribution
Air circuit breakers such as the ABB SACE Emax E2L1250 provide switching and protection for high-current low-voltage distribution circuits. The electronic overcurrent release monitors current conditions and initiates breaker operation when configured protection thresholds are exceeded, helping protect cables, busbars, switchgear and connected electrical equipment.
The PR121/P-LSI release combines long-time overload, short-time short-circuit and instantaneous short-circuit protection within one electronic trip unit. Together with the E2L frame's high-performance construction and four-pole fixed configuration, this breaker provides dependable protection for main distribution and feeder circuits in demanding electrical installations.
Typical Applications
- Low-voltage main distribution switchboards.
- Industrial power distribution systems.
- Manufacturing and process plant switchgear.
- Commercial building electrical distribution.
- Infrastructure and utility installations.
- Main incomer and high-current feeder protection.
- Four-pole three-phase distribution systems incorporating neutral switching.
Technical Specifications
| Product family | SACE Emax |
|---|---|
| Series / frame | E2L 1250 |
| ABB order code | 1SDA056057R1 |
| Product type | Air circuit breaker |
| Rated current (In) | 1250 A |
| Number of poles | 4 |
| Trip unit | PR121/P-LSI R1250 |
| Release type | Electronic |
| Protection functions | LSI |
| Long-time protection | L |
| Short-time protection | S |
| Instantaneous protection | I |
| Execution | Fixed |
| Terminal configuration | Rear horizontal terminals |
| Auxiliary contacts | 4 |
| Position indication | Open / closed |
| Weight | approx. 68 kg |
| EAN | 8015644573973 |
| HS code | 85362090 |
| Product group | 310513-New Emax |
Frequently Asked Questions
What is the ABB 1SDA056057R1?
The ABB 1SDA056057R1 is a SACE Emax E2L 1250 four-pole fixed air circuit breaker rated at 1250 A, fitted with rear horizontal terminals and a PR121/P-LSI R1250 electronic overcurrent release.
What is the rated current of the ABB E2L1250 PR121/P-LSI?
The circuit breaker is rated at 1250 A and is designed for high-current low-voltage power distribution applications.
What does LSI protection mean on the PR121/P trip unit?
LSI denotes long-time overload, short-time short-circuit and instantaneous short-circuit protection, providing coordinated protection against sustained overcurrents and short-circuit faults.
How many poles does ABB 1SDA056057R1 have?
The ABB 1SDA056057R1 is a four-pole circuit breaker, suitable for three-phase distribution systems where the neutral conductor is incorporated into the breaker configuration.
Is the ABB 1SDA056057R1 fixed or withdrawable?
This model is a fixed circuit breaker with rear horizontal terminals, intended for permanent installation within a compatible low-voltage switchboard.
Which trip unit is fitted to the ABB 1SDA056057R1?
The breaker is equipped with the ABB PR121/P-LSI R1250 electronic overcurrent release, providing long-time, short-time and instantaneous overcurrent protection.
Trusted by Electrical Engineers Worldwide
ABB SACE Emax air circuit breakers are widely used in demanding low-voltage power distribution systems, providing dependable high-current switching and electronic circuit protection for industrial, commercial and infrastructure installations.
