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.
1SDA055929R1 ABB E2N 2000 PR121/P-LSI 2000 A 4-Pole Air Circuit Breaker
ABB 1SDA055929R1 SACE Emax E2N 2000 is a 2000 A four-pole fixed air circuit breaker with rear horizontal terminals, a PR121/P-LSI electronic release and 65 kA ultimate short-circuit breaking capacity at 400 V AC.
£13,942.46
Why Choose the ABB 1SDA055929R1 E2N 2000 Air Circuit Breaker?
The ABB 1SDA055929R1 is a SACE Emax E2N 2000 air circuit breaker designed for high-current switching and selective overcurrent protection in demanding low-voltage AC power distribution systems. This four-pole fixed circuit breaker has a rated uninterrupted current of 2000 A and is equipped with a PR121/P-LSI R2000 electronic overcurrent release.
The PR121/P-LSI release provides long-time, short-time and instantaneous protection, allowing the breaker to respond to sustained overloads and both delayed and severe short-circuit conditions. The E2N performance level provides a rated ultimate short-circuit breaking capacity of 65 kA at 400 V AC, supporting use in industrial and infrastructure distribution systems with substantial prospective fault currents.
The 1SDA055929R1 is a four-pole fixed (F) circuit breaker with rear horizontal (HR) terminals for permanent installation in compatible low-voltage switchboards. It is supplied with four auxiliary contacts and circuit-breaker open/closed position indication, providing useful status information for switchboard signalling, monitoring and control circuits.
Key Advantages
- High-current 2000 A E2N air circuit breaker for demanding low-voltage power distribution.
- PR121/P-LSI R2000 electronic release provides long-time, short-time and instantaneous overcurrent protection.
- 65 kA rated ultimate short-circuit breaking capacity at 400 V AC.
- Four-pole configuration supports three-phase distribution systems requiring neutral switching.
- Fixed construction provides robust permanent integration into low-voltage switchboards.
- Rear horizontal terminals support practical connection to switchboard busbar systems.
- Short-time protection supports selective coordination between upstream and downstream protective devices.
- Four auxiliary contacts and open/closed position indication support circuit-breaker monitoring and control.
Key Features
- ABB SACE Emax E2N 2000 air circuit breaker.
- 2000 A rated uninterrupted current.
- 4-pole configuration.
- PR121/P-LSI R2000 electronic overcurrent release.
- LSI functions provide long-time, short-time and instantaneous protection.
- Fixed (F) circuit-breaker version.
- Rear horizontal (HR) main terminals.
- 65 kA Icu at 400 V AC, 50 Hz.
- Adjustable overload release setting from 800–2000 A.
- Adjustable short-time short-circuit setting from 2000–20000 A.
- Adjustable instantaneous short-circuit setting from 3000–30000 A.
- IP2X degree of protection.
- Four auxiliary contacts configured as 2 NO + 2 NC.
- Open/closed circuit-breaker position indication.
- Optional motor operating mechanism capability.
Selective LSI Protection for 2000 A Power Distribution
The ABB SACE Emax E2N 2000 provides dependable switching and electronic overcurrent protection for high-current low-voltage distribution circuits. Its PR121/P-LSI electronic release combines long-time protection against sustained overloads, short-time protection for selective fault coordination and instantaneous protection for rapid interruption of severe short-circuit currents.
With a 2000 A current rating, four-pole fixed construction and 65 kA ultimate short-circuit breaking capacity at 400 V AC, the 1SDA055929R1 is well suited to main incoming and high-current feeder duties. Rear horizontal terminals facilitate integration with suitable switchboard busbars, while its auxiliary contacts and breaker position indication support remote status monitoring and control-system integration.
Typical Applications
- Industrial low-voltage distribution switchboards.
- Main incoming circuit protection.
- Three-phase and neutral power distribution systems.
- High-current feeder protection.
- Power distribution centres and fixed switchgear assemblies.
- Manufacturing and process plants.
- Commercial and infrastructure electrical distribution.
- Distribution systems requiring selective LSI overcurrent protection.
Technical Specifications
| Series | SACE Emax |
|---|---|
| ABB order code | 1SDA055929R1 |
| Extended product type | E2N2000PR121/P-LSIIn=2000A4pFHR |
| Product type | Air circuit breaker |
| Frame | E2 |
| Performance level | N |
| Rated current (In) | 2000 A |
| Rated uninterrupted current (Iu) | 2000 A |
| Number of poles | 4 |
| Current type | AC |
| Rated ultimate short-circuit breaking capacity (Icu) at 400 V AC, 50 Hz | 65 kA |
| Release | PR121/P-LSI R2000 |
| Release type | Electronic overcurrent release |
| Protection functions | LSI – long-time, short-time and instantaneous |
| Long-time protection (L) | Overload protection |
| Overload release adjustment range | 800–2000 A |
| Short-time protection (S) | Delayed short-circuit protection |
| Short-time short-circuit adjustment range | 2000–20000 A |
| Instantaneous protection (I) | Instantaneous short-circuit protection |
| Instantaneous short-circuit adjustment range | 3000–30000 A |
| Installation | Fixed |
| Main terminal position | Rear |
| Terminal arrangement | Rear horizontal |
| Main circuit connection | Busbar connection |
| Auxiliary contacts | 4 total, 2 NO + 2 NC |
| Position indication | Circuit breaker open / closed |
| Trip indication | Yes |
| Motor operating mechanism | Optional |
| Degree of protection | IP2X |
| Product net width | 386 mm |
| Product net height | 418 mm |
| Product net depth | 302 mm |
| EAN | 8015644572693 |
| Customs tariff number | 85362090 |
Frequently Asked Questions
What is the ABB 1SDA055929R1?
The ABB 1SDA055929R1 is a SACE Emax E2N 2000 four-pole fixed air circuit breaker rated at 2000 A, with rear horizontal terminals and a PR121/P-LSI R2000 electronic overcurrent release.
What protection release is fitted to the ABB 1SDA055929R1?
The breaker is fitted with a PR121/P-LSI R2000 electronic overcurrent release, providing long-time, short-time and instantaneous overcurrent protection.
What does LSI protection mean?
LSI denotes long-time, short-time and instantaneous protection. Long-time protection responds to sustained overloads, short-time protection supports selective coordination during short-circuit conditions, and instantaneous protection provides rapid operation during severe faults.
Is the ABB 1SDA055929R1 fixed or withdrawable?
The 1SDA055929R1 is a fixed four-pole air circuit breaker fitted with rear horizontal terminals for permanent installation within a compatible low-voltage switchboard.
What is the short-circuit breaking capacity of the ABB E2N 2000?
The E2N 2000 has a rated ultimate short-circuit breaking capacity of 65 kA at 400 V AC, 50 Hz, providing substantial fault-interruption capability for demanding low-voltage distribution systems.
Trusted ABB Protection for Critical Distribution Systems
ABB SACE Emax air circuit breakers provide robust switching and electronic protection for low-voltage power distribution, combining high current capability, selective LSI protection and dependable fixed switchboard integration for demanding industrial and infrastructure applications.
