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1SDA055538R1 ABB E4S 4000A 4P PR121/P-LSIG Fixed Air Circuit Breaker
ABB 1SDA055538R1 is a SACE Emax E4S 4000 A four-pole fixed air circuit breaker with full-size neutral, rear horizontal terminals and a PR121/P-LSIG R4000 electronic overcurrent release.
£33,133.01
Why Choose the ABB E4S/f 4000 PR121/P-LSIG 1SDA055538R1 Circuit Breaker?
The ABB 1SDA055538R1 is a SACE Emax E4S 4000 A four-pole fixed air circuit breaker designed for switching and protection in demanding low-voltage power distribution systems. It combines the E4S platform with an ABB PR121/P-LSIG R4000 electronic overcurrent release.
This circuit breaker features a four-pole configuration with full-size neutral, fixed construction and rear horizontal terminals. The PR121/P-LSIG electronic trip unit provides long-time overload, short-time short-circuit, instantaneous short-circuit and earth-fault protection, delivering comprehensive LSIG protection for high-capacity distribution circuits.
Rated at 4000 A with a rated operational voltage of 690 V AC, the 1SDA055538R1 provides an ultimate short-circuit breaking capacity of 80 kA at 400 V AC. Four auxiliary change-over contacts and circuit-breaker open/closed position indication support integration into switchboard control and signalling systems.
Key Advantages
- High-current 4000 A SACE Emax E4S air circuit breaker.
- Four-pole fixed configuration with full-size neutral.
- PR121/P-LSIG R4000 electronic trip unit for comprehensive electronic protection.
- LSIG protection functions cover long-time overload, short-time, instantaneous and earth-fault conditions.
- 80 kA ultimate and service short-circuit breaking capacity at 400 V AC.
- Rear horizontal terminals support integration with switchboard busbar systems.
- Four auxiliary change-over contacts and open/closed position indication support control and signalling.
Key Features
- ABB SACE Emax E4S air circuit breaker.
- 4000 A rated uninterrupted current.
- Four-pole (4P) configuration.
- Full-size neutral.
- Fixed (F) version.
- Rear horizontal (HR) terminal arrangement.
- PR121/P-LSIG R4000 electronic overcurrent release.
- LSIG protection: long-time, short-time, instantaneous and earth fault.
- 690 V AC rated operational voltage.
- 80 kA breaking capacity at 400–440 V AC.
- 75 kA breaking capacity at 500–690 V AC.
- 80 kA short-time withstand current for 1 s.
- Four auxiliary change-over contacts for signalling and control.
Comprehensive LSIG Protection for High-Current Distribution
The ABB SACE Emax E4S platform is designed for demanding low-voltage distribution applications requiring high continuous current capability and robust short-circuit performance. The fixed construction and rear horizontal terminals of the 1SDA055538R1 make it suitable for permanent integration into compatible switchboards and busbar systems.
The PR121/P-LSIG electronic release provides long-time protection against sustained overloads, short-time protection for controlled fault response and selective coordination, instantaneous protection against severe short circuits, and integrated earth-fault protection. Combined with the 4000 A E4S platform, these functions provide comprehensive protection for high-capacity incoming and feeder circuits.
Typical Applications
- Main low-voltage distribution switchboards.
- Industrial power distribution systems.
- High-current incoming circuits.
- High-capacity feeder protection.
- Manufacturing and process plants.
- Commercial and infrastructure electrical systems.
- Transformer and generator distribution systems.
- Fixed power distribution and switchgear assemblies.
Technical Specifications
| Series | SACE Emax |
|---|---|
| Product designation | E4S/f 4000 PR121/P-LSIG In=4000A 4p F HR |
| ABB order code | 1SDA055538R1 |
| EAN | 8015644568788 |
| Product type | Air circuit breaker |
| Frame | E4 |
| Short-circuit performance level | S |
| Rated uninterrupted current | 4000 A |
| Rated operational current | 4000 A |
| Rated operational voltage | 690 V AC |
| Rated insulation voltage | 1000 V |
| Rated impulse withstand voltage | 12 kV |
| Rated ultimate short-circuit breaking capacity | 80 kA at 220–440 V AC; 75 kA at 500–690 V AC |
| Rated service short-circuit breaking capacity | 80 kA at 220–440 V AC; 75 kA at 500–690 V AC |
| Rated short-time withstand current | 80 kA for 1 s / 75 kA for 3 s |
| Number of poles | 4P |
| Neutral | Full size |
| Version | Fixed |
| Terminal arrangement | Rear horizontal (HR) |
| Trip unit | PR121/P-LSIG R4000 |
| Release type | Electronic |
| Protection functions | Long-time, short-time, instantaneous and earth fault (LSIG) |
| Overload release setting range | 1600–4000 A |
| Short-time delayed short-circuit release setting range | 4000–40000 A |
| Instantaneous short-circuit release setting range | 6000–60000 A |
| Integrated earth-fault protection | Yes |
| Auxiliary contacts | 4 change-over contacts |
| Position indication | Circuit breaker open / closed |
| Electrical durability | 5000 cycles at ≤440 V; 4000 cycles at 500–690 V |
| Mechanical durability | 15000 cycles |
| Power loss | 360 W |
| Dimensions (W × H × D) | 746 × 418 × 302 mm |
| Product net weight | 109 kg |
| Standard | IEC |
| Product group | 310513-New Emax |
Frequently Asked Questions
What is the ABB 1SDA055538R1?
The ABB 1SDA055538R1 is a SACE Emax E4S 4000 A four-pole fixed air circuit breaker with full-size neutral, rear horizontal terminals and a PR121/P-LSIG R4000 electronic overcurrent release.
What is the rated current of the ABB 1SDA055538R1?
The circuit breaker has a rated uninterrupted current of 4000 A, making it suitable for high-current low-voltage distribution applications.
What protection does the PR121/P-LSIG trip unit provide?
The PR121/P-LSIG electronic trip unit provides long-time overload, short-time short-circuit, instantaneous short-circuit and earth-fault protection.
What is the breaking capacity of the ABB 1SDA055538R1?
The E4S circuit breaker has rated ultimate and service short-circuit breaking capacities of 80 kA at 400 V AC and 75 kA at 690 V AC.
Is the ABB 1SDA055538R1 fixed or withdrawable?
The 1SDA055538R1 is a fixed four-pole circuit breaker with a full-size neutral and rear horizontal terminals.
Trusted ABB Power Distribution Protection
ABB SACE Emax air circuit breakers provide purpose-designed switching and electronic protection for demanding low-voltage power distribution systems, supporting reliable integration into industrial, commercial and infrastructure switchgear.
