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1SDA056281R1 ABB E3S2500 PR121/P-LSI 2500A 4P Fixed Air Circuit Breaker
ABB 1SDA056281R1 is a SACE Emax E3S 2500 four-pole 2500 A fixed air circuit breaker with rear horizontal terminals and a PR121/P-LSI R2500 electronic overcurrent release for high-current low-voltage circuit protection.
£17,900.36
Why Choose the ABB E3S2500 PR121/P-LSI 2500A 4P Fixed Air Circuit Breaker?
The ABB E3S2500 PR121/P-LSI, order code 1SDA056281R1, is a high-performance SACE Emax air circuit breaker designed for switching and protection in demanding low-voltage power distribution systems. Part of the ABB SACE Emax E3S series, this four-pole fixed circuit breaker is rated at 2500 A and incorporates the PR121/P-LSI R2500 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. These electronic protection functions help safeguard cables, busbars, switchgear and connected equipment against sustained overloads and short-circuit conditions while supporting coordinated protection within high-current electrical distribution systems.
This E3S2500 configuration is a four-pole fixed circuit breaker with rear horizontal terminals. It is rated for operation up to 690 V AC and provides rated ultimate and service short-circuit breaking capacities of 75 kA across the specified AC voltage range, making it suitable for demanding industrial, commercial and infrastructure switchboard applications.
Key Advantages
- High-current 2500 A SACE Emax air circuit breaker.
- PR121/P-LSI R2500 electronic overcurrent release for dependable circuit protection.
- LSI protection covers long-time overload, short-time short-circuit and instantaneous short-circuit conditions.
- Four-pole configuration for compatible four-pole low-voltage distribution systems.
- Fixed execution with rear horizontal terminals for permanent switchboard installation.
- 75 kA rated ultimate and service short-circuit breaking capacity across the specified AC voltage range.
Key Features
- ABB SACE Emax E3S 2500 air circuit breaker.
- 2500 A rated operational and uninterrupted current.
- Four-pole configuration.
- PR121/P-LSI R2500 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.
- Four auxiliary contacts with open/closed position indication.
Advanced LSI Protection for High-Current Power Distribution
Air circuit breakers such as the ABB SACE Emax E3S2500 provide switching and protection for high-current low-voltage distribution circuits. The electronic overcurrent release monitors circuit 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 an electronic trip unit. Together with the E3S frame's 2500 A current capability, 75 kA short-circuit breaking capacity and four-pole fixed construction, this configuration provides dependable protection for main distribution and high-current feeder circuits.
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 low-voltage distribution systems.
- Fixed circuit breaker switchboard assemblies.
Technical Specifications
| Product family | SACE Emax |
|---|---|
| Series / frame | E3S 2500 |
| ABB order code | 1SDA056281R1 |
| Product type | Air circuit breaker |
| Rated current (In) | 2500 A |
| Rated operational current (Ie) | 2500 A |
| Rated uninterrupted current (Iu) | 2500 A |
| Number of poles | 4 |
| Trip unit | PR121/P-LSI R2500 |
| Release type | Electronic |
| Protection functions | LSI |
| Long-time protection | L |
| Short-time protection | S |
| Instantaneous protection | I |
| Rated operational voltage | 690 V AC |
| Rated insulation voltage (Ui) | 1000 V |
| Rated impulse withstand voltage (Uimp) | 12 kV |
| Rated ultimate short-circuit breaking capacity (Icu) | 75 kA at 220–690 V AC |
| Rated service short-circuit breaking capacity (Ics) | 75 kA at 220–690 V AC |
| Rated short-time withstand current (Icw) | 75 kA for 1 s |
| Short-circuit performance level | S |
| Execution | Fixed |
| Terminal configuration | Rear horizontal terminals |
| Auxiliary contacts | 4 |
| Position indication | Open / closed |
| Electrical durability | 8000 cycles at ≤440 V; 7000 cycles at 500–690 V |
| Mechanical durability | 20,000 cycles |
| Power loss | 205 W |
| Standard | IEC |
| Net weight | 90 kg |
| EAN | 8015644576219 |
| HS code | 85362090 |
| Product group | 310513-New Emax |
Frequently Asked Questions
What is the ABB 1SDA056281R1?
The ABB 1SDA056281R1 is a SACE Emax E3S 2500 four-pole fixed air circuit breaker rated at 2500 A, equipped with rear horizontal terminals and a PR121/P-LSI R2500 electronic overcurrent release.
What is the rated current of the ABB E3S2500 PR121/P-LSI?
The ABB E3S2500 PR121/P-LSI has a rated operational and uninterrupted current of 2500 A, making it suitable for demanding 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 electronic protection against sustained overloads and short-circuit faults.
How many poles does ABB 1SDA056281R1 have?
The ABB 1SDA056281R1 is a four-pole air circuit breaker designed for compatible four-pole low-voltage distribution systems.
Is the ABB 1SDA056281R1 fixed or withdrawable?
This model is a fixed air circuit breaker with rear horizontal terminals for permanent installation within compatible low-voltage switchboards.
What is the short-circuit breaking capacity of the ABB E3S2500 1SDA056281R1?
The breaker provides rated ultimate and service short-circuit breaking capacities of 75 kA from 220 V AC through 690 V AC and a rated short-time withstand current of 75 kA for 1 s.
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 advanced electronic protection for industrial, commercial and infrastructure installations.
