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1SDA055850R1 ABB E2B 2000 PR121/P-LSIG 2000A 4P Withdrawable Air Circuit Breaker Moving Part
ABB 1SDA055850R1 E2B 2000 four-pole withdrawable air circuit breaker moving part rated at 2000 A with a PR121/P-LSIG R2000 electronic release, integrated earth-fault protection, four auxiliary contacts and 42 kA short-circuit breaking capacity.
£15,749.25
Why Choose the ABB E2B 2000 PR121/P-LSIG 2000A 4P Withdrawable Air Circuit Breaker Moving Part?
The ABB E2B 2000 PR121/P-LSIG, order code 1SDA055850R1, 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-LSIG R2000 electronic overcurrent release for comprehensive overload, short-circuit and earth-fault 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 supports applications requiring four-pole switching, while the draw-out architecture enables the breaker moving assembly to be isolated and removed for inspection, servicing or replacement.
The E2B 2000 provides rated ultimate and service short-circuit breaking capacities of 42 kA throughout its specified 220–690 V AC range. The PR121/P-LSIG release combines long-time, short-time, instantaneous and earth-fault 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-LSIG R2000 electronic protection release provides overload, short-circuit and earth-fault protection.
- 42 kA ultimate and service short-circuit breaking capacity throughout the specified AC voltage range.
- 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-LSIG R2000 electronic overcurrent release.
- Long-time (L), short-time (S), instantaneous (I) and earth-fault (G) protection functions.
- 690 V AC rated operational voltage.
- 1000 V rated insulation voltage.
- 42 kA rated ultimate and service short-circuit breaking capacity.
- 42 kA short-time withstand current for 1 s and 3 s.
- Withdrawable / draw-out moving-part configuration.
Comprehensive 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 thresholds are exceeded, helping protect cables, switchgear and connected equipment against overloads, short circuits and earth faults.
The PR121/P-LSIG release combines long-time overload protection with short-time selective, instantaneous short-circuit and earth-fault protection. Together with the withdrawable E2B architecture, this provides a practical solution for installations requiring comprehensive electronic protection and a breaker assembly that can 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 overcurrent and earth-fault protection.
Technical Specifications
| Series | SACE Emax E2B |
|---|---|
| ABB order code | 1SDA055850R1 |
| Product group | 310513-New Emax |
| EAN | 8015644571900 |
| 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 |
| Rated operational current (Ie) | 2000 A |
| Number of poles | 4 |
| Current type | AC |
| Rated operational voltage | 690 V AC |
| Rated insulation voltage (Ui) | 1000 V |
| Rated ultimate short-circuit breaking capacity (Icu) | 42 kA at 220–690 V AC |
| Rated service short-circuit breaking capacity (Ics) | 42 kA at 220–690 V AC |
| Rated short-time withstand current (Icw) | 42 kA for 1 s; 42 kA for 3 s |
| Protection release | PR121/P-LSIG R2000 |
| Release type | Electronic overcurrent release |
| Protection functions | Long-time (L), short-time (S), instantaneous (I) and earth-fault (G) |
| Earth-fault protection | Integrated |
| Mounting version | Withdrawable / draw-out |
| Component | Moving part (W MP) |
| Terminal connection type | Withdrawable circuit breaker |
| Auxiliary contacts | 4 |
| Auxiliary indication | Circuit breaker open / closed position |
| Standard | IEC |
Frequently Asked Questions
What is the ABB 1SDA055850R1?
The ABB 1SDA055850R1 is an E2B 2000 four-pole withdrawable SACE Emax air circuit breaker moving part rated at 2000 A and equipped with a PR121/P-LSIG R2000 electronic overcurrent release.
What protection functions does the PR121/P-LSIG provide?
The PR121/P-LSIG electronic release provides long-time overload (L), short-time short-circuit (S), instantaneous short-circuit (I) and earth-fault (G) 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 throughout its specified 220–690 V AC range, together with a rated short-time withstand current of 42 kA for 1 s and 3 s.
Is the ABB 1SDA055850R1 fixed or withdrawable?
The 1SDA055850R1 is the withdrawable moving part of the E2B 2000 circuit breaker and is designed for use with the appropriate ABB Emax withdrawable fixed part.
Does the ABB 1SDA055850R1 provide earth-fault protection?
Yes. Its PR121/P-LSIG R2000 electronic release includes integrated earth-fault (G) protection in addition to long-time, short-time and instantaneous overcurrent protection.
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 comprehensive electronic protection, robust fault-interruption performance and service-friendly withdrawable construction.
