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.
1SDA057211R1 ABB E1B-A 800 PR121/P-LSI 800A 3P Fixed Air Circuit Breaker
ABB 1SDA057211R1 E1B-A 800 PR121/P-LSI is an 800 A three-pole fixed SACE Emax air circuit breaker with LSI electronic overcurrent protection for low-voltage power distribution systems.
£6,768.05
Why Choose the ABB E1B-A 800 PR121/P-LSI 800A 3P Fixed Air Circuit Breaker?
The ABB E1B-A 800 PR121/P-LSI, order code 1SDA057211R1, is a robust SACE Emax air circuit breaker (ACB) designed for protection and switching in low-voltage power distribution systems. This three-pole model has a rated current of 800 A and belongs to ABB's E1B-A range of low-voltage power circuit breakers for industrial switchboards and distribution assemblies.
The breaker is equipped with an ABB PR121/P-LSI electronic overcurrent release, providing long-time, short-time and instantaneous protection functions. This combination protects electrical distribution circuits against sustained overloads and short-circuit currents while allowing appropriate protection coordination within industrial power systems.
Configured as a three-pole fixed circuit breaker, the E1B-A 800 PR121/P-LSI is intended for permanent installation within compatible switchgear assemblies. Its 800 A current rating, electronic protection and SACE Emax construction make it suitable for feeder, incomer and general power distribution duties where dependable circuit protection is required.
Key Advantages
- Robust 800 A SACE Emax air circuit breaker for low-voltage power distribution.
- Three-pole fixed configuration for permanent switchboard installation.
- Integrated PR121/P-LSI electronic overcurrent release.
- LSI functionality provides long-time, short-time and instantaneous protection.
- Electronic protection supports effective coordination within distribution networks.
- Suitable for incomer and feeder protection in industrial switchgear.
- SACE Emax construction provides dependable switching and circuit isolation.
- Designed for integration into professional low-voltage power distribution assemblies.
Key Features
- ABB SACE Emax E1B-A air circuit breaker.
- 800 A rated current.
- Three-pole (3P) configuration.
- Fixed (F) installation version.
- PR121/P-LSI electronic protection release.
- Long-time (L) overload protection.
- Short-time (S) short-circuit protection.
- Instantaneous (I) short-circuit protection.
- Designed for low-voltage power distribution and switchboard applications.
- Suitable for selective protection of major distribution circuits.
Reliable LSI Protection for Low-Voltage Distribution
Air circuit breakers such as the ABB SACE Emax E1B-A provide switching, isolation and overcurrent protection for important low-voltage distribution circuits. The electronic trip unit continuously evaluates current conditions so that the breaker can respond to overloads and short circuits before they cause serious damage to cables, switchgear or connected equipment.
The PR121/P-LSI release combines long-time protection for sustained overload conditions with short-time and instantaneous functions for short-circuit protection. This protection arrangement is particularly useful in distribution systems where engineers need dependable fault interruption together with coordination between upstream and downstream protective devices.
Typical Applications
- Industrial low-voltage switchboards.
- Main incomer circuit protection.
- High-current feeder protection.
- Manufacturing and process plants.
- Commercial and infrastructure power distribution.
- Transformer secondary distribution systems.
- Power distribution centres.
- Fixed low-voltage switchgear assemblies.
Technical Specifications
| Series | SACE Emax |
|---|---|
| ABB order code | 1SDA057211R1 |
| Product group | 310513-New Emax |
| Product type | Air circuit breaker (ACB) |
| Frame / size | E1 |
| Performance level | B |
| Rated current (In) | 800 A |
| Number of poles | 3P |
| Installation version | Fixed |
| Trip unit | PR121/P-LSI electronic release |
| Protection functions | Long-time (L), short-time (S), instantaneous (I) |
| Current type | AC |
Frequently Asked Questions
What is the ABB 1SDA057211R1 used for?
The ABB 1SDA057211R1 is an 800 A three-pole SACE Emax air circuit breaker designed for protection, switching and isolation of low-voltage power distribution circuits.
What trip unit is fitted to the ABB E1B-A 800?
This circuit breaker is equipped with an ABB PR121/P-LSI electronic release providing long-time, short-time and instantaneous overcurrent protection.
What is the rated current of the ABB 1SDA057211R1?
The E1B-A circuit breaker has a rated current of 800 A.
What protection functions does PR121/P-LSI provide?
The PR121/P-LSI provides long-time overload protection together with short-time and instantaneous short-circuit protection.
Is the ABB 1SDA057211R1 fixed or withdrawable?
The 1SDA057211R1 is a fixed three-pole circuit breaker intended for permanent installation within a compatible low-voltage switchgear assembly.
Trusted Power Distribution Protection from ABB
ABB SACE Emax air circuit breakers provide dependable switching and electronic overcurrent protection for demanding low-voltage distribution systems, helping protect critical feeders, incomers and electrical infrastructure.
