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1SDA056861R1 ABB E4H 4000 PR122/P-LSIG 4000A 4P Fixed Air Circuit Breaker
ABB 1SDA056861R1 E4H 4000 four-pole fixed SACE Emax air circuit breaker rated at 4000 A with a PR122/P-LSIG electronic protection release and rear horizontal terminals.
£34,641.43
Why Choose the ABB E4H 4000 PR122/P-LSIG 4000A 4P Fixed Air Circuit Breaker?
The ABB E4H 4000 PR122/P-LSIG, order code 1SDA056861R1, is a high-performance four-pole fixed air circuit breaker (ACB) designed for protection and switching of high-current low-voltage electrical distribution systems. Part of the established ABB SACE Emax E4 series, this circuit breaker combines a rated uninterrupted current of 4000 A with the advanced PR122/P-LSIG electronic protection release.
The E4H performance level provides high short-circuit breaking capability for demanding industrial and commercial power distribution applications. Its PR122/P-LSIG electronic trip unit provides long-time, short-time, instantaneous and ground-fault protection functions, helping protect conductors, switchboards and connected equipment against overloads, short circuits and earth faults.
This configuration is a four-pole fixed circuit breaker with rear horizontal main terminals. It is rated for operation up to 690 V AC and provides an ultimate short-circuit breaking capacity of 100 kA at common industrial voltages up to 500 V AC, making it suitable for high-capacity switchboards, transformer distribution systems and critical electrical infrastructure.
Key Advantages
- Heavy-duty 4000 A air circuit breaker for high-current distribution systems.
- Four-pole configuration enables switching and protection of all four conductors.
- Advanced PR122/P-LSIG electronic protection release.
- Provides long-time, short-time, instantaneous and ground-fault protection.
- 100 kA breaking capacity at 400 V AC for demanding installations.
- Fixed construction with rear horizontal terminals for switchboard integration.
- ABB SACE Emax design engineered for reliable protection of major low-voltage distribution systems.
Key Features
- ABB SACE Emax E4H air circuit breaker.
- 4000 A rated uninterrupted current.
- 4-pole configuration.
- PR122/P-LSIG electronic overcurrent release.
- Fixed circuit-breaker version.
- Rear horizontal terminal connections.
- Rated operational voltage up to 690 V AC.
- Rated insulation voltage of 1000 V.
- Rated impulse withstand voltage of 12 kV.
- Integrated ground-fault protection through the LSIG release functionality.
- Supplied with four auxiliary change-over contacts for circuit-breaker open/closed position signalling.
Reliable Protection for High-Current Power Distribution
Air circuit breakers are used as primary protection and switching devices in high-current low-voltage distribution systems. The ABB E4H 4000 combines high continuous-current capability with substantial short-circuit interruption performance, allowing it to protect switchboards, feeders and major electrical loads where fault currents can be significant.
The PR122/P-LSIG electronic release expands protection beyond basic overload and short-circuit tripping by providing adjustable long-time, short-time, instantaneous and ground-fault protection functions. This allows the circuit breaker to be coordinated with upstream and downstream protective devices while supporting selective and dependable distribution-system protection.
Typical Applications
- Main incoming protection for low-voltage switchboards.
- Industrial power distribution and process plants.
- Transformer secondary and distribution protection.
- Generator and utility distribution systems.
- Large commercial and infrastructure electrical installations.
- High-current feeder protection.
- Power distribution centres and main switchboards.
Technical Specifications
| Product family | SACE Emax |
|---|---|
| Series / frame | E4H |
| ABB order code | 1SDA056861R1 |
| Product type | Air circuit breaker (ACB) |
| Rated uninterrupted current (Iu) | 4000 A |
| Rated operational current (Ie) | 4000 A |
| Number of poles | 4 |
| Version | Fixed |
| Trip unit | PR122/P-LSIG electronic release |
| Protection functions | Long-time, short-time, instantaneous and ground fault (LSIG) |
| 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) at 220–500 V AC | 100 kA |
| Rated ultimate short-circuit breaking capacity (Icu) at 660–690 V AC | 85 kA |
| Rated service short-circuit breaking capacity (Ics) at 220–500 V AC | 100 kA |
| Rated service short-circuit breaking capacity (Ics) at 660–690 V AC | 85 kA |
| Rated short-time withstand current (Icw), 1 s | 100 kA |
| Rated short-time withstand current (Icw), 3 s | 75 kA |
| Terminal connection | Rear horizontal |
| Current type | AC |
| Short-circuit performance level | H |
| Standard | IEC |
| Power loss | 360 W |
| Mechanical durability | 15,000 operating cycles |
| Auxiliary contacts | 4 change-over contacts for open/closed position indication |
Frequently Asked Questions
What is the ABB 1SDA056861R1?
The ABB 1SDA056861R1 is an E4H 4000 four-pole fixed SACE Emax air circuit breaker rated at 4000 A and equipped with a PR122/P-LSIG electronic protection release.
What protection functions does the PR122/P-LSIG release provide?
The PR122/P-LSIG provides long-time overload, short-time short-circuit, instantaneous short-circuit and ground-fault protection functions.
What is the breaking capacity of this E4H circuit breaker?
The breaker has an ultimate short-circuit breaking capacity of 100 kA at AC voltages from 220 to 500 V and 85 kA at 660–690 V AC.
Is the ABB 1SDA056861R1 fixed or withdrawable?
This model is a fixed four-pole circuit breaker fitted with rear horizontal main terminals.
Where is the E4H 4000 PR122/P-LSIG typically used?
It is designed for high-current low-voltage distribution applications including main switchboards, industrial plants, transformer distribution systems, large commercial installations and infrastructure power networks.
Trusted Protection for Critical Power Systems
ABB SACE Emax air circuit breakers provide high-performance switching and protection for demanding low-voltage power distribution systems, combining substantial current capacity with advanced electronic protection and dependable short-circuit interruption.
