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1SDA056850R1 ABB E4H4000 PR121/P-LSIG 4000A 3-Pole Fixed Air Circuit Breaker
ABB 1SDA056850R1 E4H4000 PR121/P-LSIG is a 4000 A three-pole fixed SACE Emax air circuit breaker with LSIG electronic protection, rear horizontal terminals and a rated operational voltage up to 690 V AC.
£29,223.10
Why Choose the ABB E4H4000 PR121/P-LSIG 4000A Air Circuit Breaker?
The ABB 1SDA056850R1, extended product type E4H4000PR121/P-LSIGIn=4000A3pFHR, is a high-performance SACE Emax air circuit breaker (ACB) designed for protection and switching in demanding low-voltage electrical distribution systems. Part of the ABB SACE Emax E4 series, this three-pole fixed circuit breaker combines a 4000 A current rating with the electronic PR121/P-LSIG overcurrent release for comprehensive circuit protection.
The E4H4000 is engineered for high-current industrial and commercial power distribution applications where dependable protection against overloads, short circuits and earth faults is essential. Its PR121/P-LSIG electronic trip unit provides long-time, short-time, instantaneous and ground-fault protection functions, helping safeguard electrical installations and connected equipment.
With a rated uninterrupted current of 4000 A, rated operational voltage up to 690 V AC and an ultimate short-circuit breaking capacity of 100 kA at 400 V AC, this Emax circuit breaker is suited to substantial power distribution systems. This version features a three-pole fixed configuration with rear horizontal terminals, four auxiliary contacts and open/closed circuit-breaker position indication.
Key Advantages
- High-capacity ABB SACE Emax air circuit breaker for low-voltage power distribution.
- 4000 A rated uninterrupted current for demanding high-current installations.
- PR121/P-LSIG electronic overcurrent release providing comprehensive LSIG protection.
- 100 kA ultimate short-circuit breaking capacity at 400 V AC.
- Three-pole fixed construction with rear horizontal terminals.
- Rated operational voltage up to 690 V AC.
- Four auxiliary contacts and circuit-breaker open/closed position indication fitted.
Key Features
- ABB SACE Emax E4H series air circuit breaker.
- 4000 A rated current.
- 3-pole fixed configuration.
- PR121/P-LSIG electronic trip unit.
- Long-time, short-time, instantaneous and ground-fault protection functions.
- 690 V AC rated operational voltage.
- 100 kA Icu at 400 V AC.
- Rear horizontal main terminals.
- Four auxiliary contacts fitted.
- Open/closed circuit-breaker position indication.
Reliable Protection for High-Current Power Distribution
Air circuit breakers such as the ABB SACE Emax E4H4000 protect low-voltage distribution networks by interrupting potentially damaging currents when abnormal operating conditions occur. Their high current and short-circuit ratings make them particularly suitable for main distribution boards, switchboards and other installations handling substantial electrical loads.
The PR121/P-LSIG electronic release provides multiple protection functions within one trip unit. Long-time protection addresses overload conditions, short-time and instantaneous functions provide short-circuit protection, and ground-fault protection helps detect potentially hazardous current flowing to earth. This combination makes the E4H4000 suitable for coordinated protection in complex industrial power systems.
Typical Applications
- Main low-voltage electrical distribution switchboards.
- Industrial power distribution systems.
- Transformer and installation protection.
- Manufacturing and process plants.
- Commercial and infrastructure electrical distribution.
- High-current switchgear assemblies.
- Generator and power distribution installations.
Technical Specifications
| Series | SACE Emax E4 |
|---|---|
| ABB order code | 1SDA056850R1 |
| Extended product type | E4H4000PR121/P-LSIGIn=4000A3pFHR |
| Product type | Air circuit breaker |
| Rated current (In) | 4000 A |
| Rated uninterrupted current (Iu) | 4000 A |
| Rated operational current (Ie) | 4000 A |
| Rated operational voltage | 690 V AC |
| Rated insulation voltage (Ui) | 1000 V |
| Rated impulse withstand voltage (Uimp) | 12 kV |
| Number of poles | 3 |
| Mounting version | Fixed |
| Terminal configuration | Rear horizontal |
| Trip unit | PR121/P-LSIG |
| Protection functions | Long-time, short-time, instantaneous and ground fault (LSIG) |
| Short-circuit performance level | H |
| Rated ultimate short-circuit breaking capacity (Icu) at 400 V AC | 100 kA |
| Rated ultimate short-circuit breaking capacity (Icu) at 690 V AC | 85 kA |
| Rated short-time withstand current (Icw) | 100 kA for 1 s; 75 kA for 3 s |
| Current type | AC |
| Power loss | 360 W |
| Mechanical durability | 15,000 cycles |
| Electrical durability | 5,000 cycles at Ue ≤ 440 V; 4,000 cycles at 500–690 V |
| Auxiliary contacts | 4 |
| Dimensions (W × H × D) | 566 × 418 × 302 mm |
| Net weight | 81 kg |
| EAN | 8015644581909 |
| Standard | IEC |
Frequently Asked Questions
What is the ABB 1SDA056850R1 used for?
The ABB 1SDA056850R1 is a SACE Emax E4H air circuit breaker designed for switching and protecting high-current low-voltage electrical distribution systems.
What is the rated current of the ABB E4H4000?
This circuit breaker has a rated uninterrupted current of 4000 A, making it suitable for substantial industrial and commercial power distribution applications.
What protection does the PR121/P-LSIG trip unit provide?
The PR121/P-LSIG electronic release provides long-time, short-time, instantaneous and ground-fault protection functions for comprehensive electrical circuit protection.
What is the short-circuit breaking capacity of this circuit breaker?
The E4H4000 has a rated ultimate short-circuit breaking capacity of 100 kA at 400 V AC and 85 kA at 690 V AC.
Is the ABB 1SDA056850R1 fixed or withdrawable?
The 1SDA056850R1 is a three-pole fixed circuit breaker equipped with rear horizontal terminals.
Trusted ABB Power Distribution Technology
ABB SACE Emax air circuit breakers are engineered for dependable switching and protection in demanding low-voltage power distribution systems, combining high breaking performance with electronic protection technology for industrial and commercial installations.
