Standard delivery
£8 ex VAT · free over £200UK parcel delivery is £8 ex VAT, or free on orders over £200 ex VAT.
Heavier items may be charged at a weight-based or pallet rate, shown at checkout.
1SDA056777R1 ABB E3L2500 PR121/P-LSI 2500A 4-Pole Withdrawable Air Circuit Breaker Moving Part
ABB 1SDA056777R1 E3L2500 PR121/P-LSI is a 2500 A four-pole SACE Emax withdrawable air circuit breaker moving part with LSI electronic overcurrent protection for high-current low-voltage power distribution.
£23,414.39
Why Choose the ABB E3L2500 PR121/P-LSI 2500A Air Circuit Breaker Moving Part?
The ABB E3L2500 PR121/P-LSI, order code 1SDA056777R1, is a high-performance SACE Emax moving part for a withdrawable air circuit breaker designed for switching and protection in high-current low-voltage electrical distribution systems. Part of the proven ABB SACE Emax E3L series, this four-pole configuration combines a 2500 A rated uninterrupted current with the PR121/P-LSI R2500 electronic overcurrent release.
The PR121/P-LSI electronic trip unit provides long-time overload, short-time short-circuit and instantaneous short-circuit protection. These LSI protection functions help safeguard switchboards, busbars, cables and connected equipment against damaging overcurrent conditions while supporting coordinated protection in demanding electrical distribution networks.
Designed as the moving portion of a four-pole withdrawable E3L circuit breaker, the 1SDA056777R1 is intended for use with the corresponding ABB SACE Emax fixed part. It is rated for operation up to 690 V AC and provides an ultimate short-circuit breaking capacity of 130 kA at 400 V AC, making it suitable for demanding industrial and infrastructure power distribution applications.
Key Advantages
- Genuine ABB SACE Emax E3L moving part for withdrawable circuit-breaker assemblies.
- 2500 A rated uninterrupted current for high-current low-voltage distribution systems.
- Four-pole construction for three-phase and neutral distribution circuits.
- PR121/P-LSI R2500 electronic overcurrent release.
- LSI functions provide long-time, short-time and instantaneous overcurrent protection.
- 130 kA ultimate breaking capacity at 400 V AC for demanding fault levels.
- Withdrawable construction supports convenient inspection, maintenance and replacement.
Key Features
- ABB SACE Emax E3L series.
- 2500 A rated uninterrupted current.
- Four-pole construction.
- Withdrawable moving-part execution.
- PR121/P-LSI R2500 electronic trip unit.
- Long-time (L) overload protection.
- Short-time (S) short-circuit protection.
- Instantaneous (I) short-circuit protection.
- 690 V AC rated operational voltage.
- Fitted with four auxiliary contacts and open/closed position indication.
Reliable Protection for High-Power Distribution Systems
ABB SACE Emax air circuit breakers provide switching, isolation and overcurrent protection for high-current low-voltage distribution systems. Their high short-circuit breaking capability enables severe electrical faults to be interrupted while helping protect switchboards, busbars, cables and connected equipment.
The PR121/P-LSI electronic release combines long-time overload protection with short-time and instantaneous short-circuit protection. Together with the withdrawable E3L architecture, this provides a maintainable and dependable protection solution for industrial plants, infrastructure facilities and large commercial power distribution systems.
Typical Applications
- Main incoming protection in low-voltage switchboards.
- Industrial power distribution systems.
- Transformer secondary protection.
- High-current feeder protection.
- Manufacturing and process plants.
- Large commercial and infrastructure electrical installations.
- Four-wire distribution systems requiring neutral switching.
- Withdrawable switchgear requiring maintainable circuit-breaker assemblies.
Technical Specifications
| Series | SACE Emax E3L |
|---|---|
| ABB order code | 1SDA056777R1 |
| Product type | Air circuit breaker moving part |
| Rated uninterrupted current (Iu) | 2500 A |
| Rated operational voltage | 690 V AC |
| Number of poles | 4 |
| Execution | Withdrawable moving part |
| Protection release | PR121/P-LSI R2500 |
| Protection functions | Long-time, short-time and instantaneous (LSI) |
| Ultimate short-circuit breaking capacity (Icu) at 400 V AC | 130 kA |
| Ultimate short-circuit breaking capacity (Icu) at 440 V AC | 110 kA |
| Ultimate short-circuit breaking capacity (Icu) at 500 V AC | 85 kA |
| Ultimate short-circuit breaking capacity (Icu) at 690 V AC | 85 kA |
| Service short-circuit breaking capacity (Ics) at 400 V AC | 130 kA |
| Service short-circuit breaking capacity (Ics) at 690 V AC | 65 kA |
| Auxiliary contacts | 4 |
| Position indication | Circuit breaker open / closed |
| Weight | 96 kg |
| EAN | 8015644581176 |
Frequently Asked Questions
What is the ABB 1SDA056777R1?
The ABB 1SDA056777R1 is the moving part of a four-pole SACE Emax E3L withdrawable air circuit breaker, rated at 2500 A and fitted with a PR121/P-LSI R2500 electronic overcurrent release.
What protection functions does the PR121/P-LSI provide?
The PR121/P-LSI electronic release provides long-time overload, short-time short-circuit and instantaneous short-circuit protection, represented by the LSI designation.
What is the rated current of the ABB E3L2500 1SDA056777R1?
This E3L2500 moving part has a rated uninterrupted current of 2500 A.
What is the breaking capacity of the ABB 1SDA056777R1?
The E3L2500 provides an ultimate short-circuit breaking capacity of 130 kA at 400 V AC and 85 kA at 690 V AC.
Is the ABB 1SDA056777R1 a fixed circuit breaker?
No. The 1SDA056777R1 is a withdrawable moving part designed for use with the corresponding ABB SACE Emax E3L fixed part installed in the switchboard.
Trusted Protection for Industrial Power Distribution
ABB SACE Emax circuit breakers provide robust high-current protection and flexible switchgear integration, with electronic protection releases and withdrawable configurations supporting dependable operation and efficient servicing in demanding industrial and infrastructure power distribution systems.
