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1SDA055849R1 ABB E2B 2000 PR121/P-LSI 2000A 4P Withdrawable Air Circuit Breaker Moving Part
ABB 1SDA055849R1 E2B 2000 four-pole withdrawable air circuit breaker moving part rated at 2000 A with a PR121/P-LSI R2000 electronic release, four auxiliary contacts, open/closed position indication and 42 kA short-circuit breaking capacity.
£14,853.26
Why Choose the ABB E2B 2000 PR121/P-LSI 2000A 4P Withdrawable Air Circuit Breaker Moving Part?
The ABB E2B 2000 PR121/P-LSI, order code 1SDA055849R1, is a high-performance four-pole withdrawable air circuit breaker moving part designed for protection and switching in demanding low-voltage electrical distribution systems. Part of the ABB SACE Emax E2B series, it combines a 2000 A rated current with the PR121/P-LSI R2000 electronic overcurrent release for long-time overload, short-time and instantaneous short-circuit protection.
This E2B configuration is supplied as the withdrawable moving part (W MP) and is designed for use with the appropriate ABB Emax withdrawable fixed part. Its four-pole construction enables switching of all four conductors in suitable three-phase distribution systems, while the draw-out architecture allows the breaker moving assembly to be isolated and removed for inspection, servicing or replacement.
The E2B 2000 platform provides robust short-circuit performance for high-current power distribution. The PR121/P-LSI release combines long-time, short-time and instantaneous protection functions, while four auxiliary contacts and circuit-breaker open/closed position indication support integration with switchboard signalling, monitoring and control systems.
Key Advantages
- Heavy-duty ABB SACE Emax air circuit breaker moving part for low-voltage power distribution.
- 2000 A rated current for high-current industrial and commercial installations.
- Four-pole configuration for applications requiring four-pole switching.
- PR121/P-LSI R2000 electronic protection release provides long-time, short-time and instantaneous protection.
- 42 kA short-circuit breaking performance for demanding low-voltage networks.
- Withdrawable moving-part construction supports efficient inspection, servicing and replacement.
- Four auxiliary contacts and open/closed position indication support switchboard monitoring and control.
Key Features
- ABB SACE Emax E2B series.
- 2000 A rated uninterrupted current.
- 4-pole withdrawable air circuit breaker moving part.
- PR121/P-LSI R2000 electronic overcurrent release.
- Long-time (L), short-time (S) and instantaneous (I) protection functions.
- 690 V AC rated operational voltage.
- 1000 V rated insulation voltage.
- 12 kV rated impulse withstand voltage.
- 42 kA rated ultimate and service short-circuit breaking capacity.
- 42 kA short-time withstand current.
Selective Protection for High-Current Distribution Systems
Air circuit breakers such as the ABB E2B 2000 provide switching and automatic protection for high-current low-voltage circuits. The electronic protection release monitors current conditions and commands the breaker to interrupt the circuit when configured protection thresholds are exceeded, helping protect cables, switchgear and connected equipment against damaging overload and short-circuit currents.
The PR121/P-LSI release combines long-time overload protection with short-time and instantaneous short-circuit protection. The short-time function supports selective coordination between protective devices, while the withdrawable E2B architecture allows the breaker moving part to be removed from its corresponding fixed part for inspection, servicing or replacement.
Typical Applications
- Low-voltage main distribution switchboards.
- Industrial power distribution systems.
- Main incomer and high-current feeder protection.
- Four-pole three-phase distribution systems.
- Manufacturing and process plants.
- Commercial and infrastructure electrical installations.
- Generator and transformer distribution systems.
- Withdrawable switchgear requiring selective high-current circuit protection.
Technical Specifications
| Series | SACE Emax E2B |
|---|---|
| ABB order code | 1SDA055849R1 |
| Product group | 310513-New Emax |
| EAN | 8015644571894 |
| Product type | Air circuit breaker withdrawable moving part |
| Frame size | E2 |
| Short-circuit performance level | B |
| Rated current (In) | 2000 A |
| Rated uninterrupted current (Iu) | 2000 A |
| Number of poles | 4 |
| Current type | AC |
| 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) | 42 kA |
| Rated service short-circuit breaking capacity (Ics) | 42 kA |
| Rated short-time withstand current (Icw) | 42 kA |
| Protection release | PR121/P-LSI R2000 |
| Release type | Electronic overcurrent release |
| Protection functions | Long-time (L), short-time (S) and instantaneous (I) |
| Integrated earth-fault protection | No |
| Mounting version | Withdrawable / draw-out |
| Component | Moving part (W MP) |
| Auxiliary contacts | 4 |
| Auxiliary indication | Circuit breaker open / closed position |
| Product net width | 414 mm |
| Product net height | 461 mm |
| Product net depth | 396.5 mm |
| Product net weight | 61 kg |
| Mechanical durability | 25,000 operating cycles |
| Electrical durability | 10,000 cycles at ≤440 V; 8,000 cycles at 500–690 V |
Frequently Asked Questions
What is the ABB 1SDA055849R1?
The ABB 1SDA055849R1 is an E2B 2000 four-pole withdrawable SACE Emax air circuit breaker moving part rated at 2000 A and equipped with a PR121/P-LSI R2000 electronic overcurrent release.
What protection functions does the PR121/P-LSI provide?
The PR121/P-LSI electronic release provides long-time overload (L), short-time short-circuit (S) and instantaneous short-circuit (I) protection.
What is the breaking capacity of the ABB E2B 2000?
The E2B 2000 B-performance platform provides rated ultimate and service short-circuit breaking capacities of 42 kA, making it suitable for demanding high-current low-voltage distribution applications.
Is the ABB 1SDA055849R1 fixed or withdrawable?
The 1SDA055849R1 is the withdrawable moving part of an E2B 2000 circuit breaker and is designed for use with the appropriate ABB Emax withdrawable fixed part.
Does the ABB 1SDA055849R1 provide integrated earth-fault protection?
No. The PR121/P-LSI configuration provides long-time, short-time and instantaneous overcurrent protection. Applications requiring an integrated earth-fault protection function use an appropriate LSIG release configuration.
Trusted Low-Voltage Protection from ABB
ABB SACE Emax air circuit breakers are engineered for dependable switching and protection in demanding low-voltage distribution systems, combining electronic protection, robust fault-interruption performance and service-friendly withdrawable construction.
