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1SDA056129R1 ABB E3N2500PR121/P-LSI 2500A 3-Pole Air Circuit Breaker Moving Part
ABB E3N2500PR121/P-LSI is a 2500 A three-pole withdrawable SACE Emax air circuit breaker moving part with a PR121/P-LSI R2500 electronic trip unit providing long-time, short-time and instantaneous overcurrent protection.
£15,687.63
Why Choose the ABB E3N2500PR121/P-LSI 2500A Air Circuit Breaker?
The ABB E3N2500PR121/P-LSI is a high-performance 2500 A three-pole air circuit breaker moving part designed for reliable switching and overcurrent protection in demanding low-voltage power distribution systems. As part of the established ABB SACE Emax New Emax series, this E3N configuration combines a robust high-current breaker frame with the PR121/P-LSI electronic overcurrent release.
The PR121/P-LSI trip unit provides long-time overload, short-time short-circuit and instantaneous short-circuit protection. These LSI functions help protect cables, busbars, switchboards and connected equipment against overloads and short circuits while supporting coordinated protection within industrial and commercial electrical distribution networks.
With a rated current of 2500 A, a three-pole withdrawable moving-part configuration and an E3N frame rated for 65 kA ultimate short-circuit breaking capacity, ABB order code 1SDA056129R1 is suitable for high-current switchboard applications. The assembly is fitted with four auxiliary contacts and circuit-breaker open/closed position indication for status signalling and control integration.
Key Advantages
- High-capacity 2500 A air circuit breaker moving part for low-voltage distribution.
- Three-pole withdrawable configuration suitable for three-phase AC systems.
- PR121/P-LSI R2500 electronic overcurrent release.
- LSI functions provide long-time, short-time and instantaneous overcurrent protection.
- 65 kA ultimate and service short-circuit breaking capacity.
- Withdrawable moving-part design supports efficient inspection, servicing and breaker replacement.
- Four auxiliary contacts and open/closed position indication support switchboard monitoring and control.
Key Features
- ABB SACE Emax E3N series.
- 2500 A rated uninterrupted current.
- Three-pole circuit-breaker configuration.
- Withdrawable moving part (W MP).
- PR121/P-LSI electronic trip unit.
- Long-time overload protection (L).
- Short-time short-circuit protection (S).
- Instantaneous short-circuit protection (I).
- 690 V AC rated operational voltage.
- Four auxiliary contacts with circuit-breaker open/closed position indication.
Reliable Protection for High-Current Power Distribution
Air circuit breakers such as the ABB E3N2500 provide switching and overcurrent protection for high-current low-voltage distribution circuits. The electronic trip release monitors current conditions and initiates breaker operation when configured protection thresholds are exceeded, helping protect cables, busbars, switchboards and connected electrical equipment against damaging overload and short-circuit currents.
The PR121/P-LSI release combines long-time, short-time and instantaneous protection functions in an electronic trip system. Together with the E3N frame's 65 kA short-circuit performance and service-friendly withdrawable construction, this makes the breaker moving part suitable for critical main distribution and high-current feeder applications.
Typical Applications
- Low-voltage main distribution switchboards.
- Industrial power distribution systems.
- Manufacturing and process facilities.
- Commercial and infrastructure electrical installations.
- Incoming mains and high-current feeder protection.
- Transformer secondary distribution systems.
- Withdrawable ABB SACE Emax switchgear assemblies.
Technical Specifications
| Series | SACE Emax / New Emax |
|---|---|
| ABB order code | 1SDA056129R1 |
| Extended product type | E3N2500PR121/P-LSIIn=2500A3pWMP |
| Product type | Air circuit breaker moving part |
| Frame | E3N |
| Short-circuit performance level | N |
| Rated uninterrupted current | 2500 A |
| Number of poles | 3 |
| Current type | AC |
| Rated operational voltage | 690 V AC |
| Rated ultimate short-circuit breaking capacity | 65 kA |
| Rated service short-circuit breaking capacity | 65 kA |
| Rated short-time withstand current | 65 kA for 1 s / 3 s |
| Execution | Withdrawable moving part (W MP) |
| Trip unit | PR121/P-LSI |
| Release type | Electronic |
| Overcurrent release rating | R2500 |
| Protection functions | L, S and I |
| Overload release setting range | 1000–2500 A |
| Short-time short-circuit setting range | 2500–25,000 A |
| Instantaneous short-circuit setting range | 3750–37,500 A |
| Auxiliary contacts | 4 |
| Position indication | Circuit breaker open / closed |
| Electrical durability | 8000 cycles at Ue ≤ 440 V; 7000 cycles at Ue 500–690 V |
| Mechanical durability | 20,000 cycles |
| Dimensions (W × H × D) | 432 × 461 × 396.5 mm |
| Net weight | 64 kg |
| EAN | 8015644574697 |
| Standard | IEC |
Frequently Asked Questions
What is the ABB E3N2500PR121/P-LSI used for?
It is a 2500 A three-pole air circuit breaker moving part designed for switching and protecting high-current low-voltage AC power distribution circuits.
What protection does the PR121/P-LSI trip unit provide?
The PR121/P-LSI electronic trip unit provides long-time overload (L), short-time short-circuit (S) and instantaneous short-circuit (I) protection.
What is the breaking capacity of ABB 1SDA056129R1?
The E3N2500 has a rated ultimate and service short-circuit breaking capacity of 65 kA, with a rated short-time withstand current of 65 kA.
Is ABB 1SDA056129R1 a fixed or withdrawable breaker?
ABB order code 1SDA056129R1 is a three-pole withdrawable moving part for a compatible SACE Emax E3N circuit-breaker installation.
Does the E3N2500PR121/P-LSI include auxiliary contacts?
Yes. This configuration is fitted with four auxiliary contacts together with circuit-breaker open/closed position indication for signalling and control applications.
Trusted by Electrical Professionals Worldwide
ABB SACE Emax air circuit breakers are widely used in industrial and commercial low-voltage distribution systems, combining robust high-current switching technology with electronic overcurrent protection and service-friendly withdrawable configurations for demanding electrical installations.
