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1SDA056784R1 ABB E4S 4000 PR121/P-LI 4000 A 3-Pole Air Circuit Breaker
ABB 1SDA056784R1 E4S 4000 is a fixed three-pole 4000 A SACE Emax air circuit breaker with PR121/P-LI electronic protection, rear horizontal terminals and 75 kA short-circuit breaking capacity for high-current low-voltage power distribution.
£24,911.27
Why Choose the ABB 1SDA056784R1 E4S 4000 Air Circuit Breaker?
The ABB 1SDA056784R1 is a high-performance SACE Emax E4S 4000 air circuit breaker (ACB) designed for protection and switching in high-current low-voltage electrical distribution systems. Part of the ABB New Emax / SACE Emax range, this three-pole fixed circuit breaker combines a 4000 A current rating with the PR121/P-LI electronic overcurrent release for dependable overload and short-circuit protection.
Designed for demanding industrial and commercial power distribution applications, the E4S 4000 provides a high short-circuit breaking capability while supporting reliable operation at system voltages up to 690 V AC. The PR121/P-LI electronic trip unit provides long-time overload and instantaneous short-circuit protection, helping safeguard downstream equipment, conductors and electrical installations.
This configuration is a three-pole fixed circuit breaker with rear horizontal terminals, a rated uninterrupted current of 4000 A and a rated service and ultimate short-circuit breaking capacity of 75 kA up to 690 V AC. It is supplied with four auxiliary change-over contacts and circuit-breaker open/closed position indication.
Key Advantages
- High-capacity 4000 A air circuit breaker for low-voltage power distribution.
- 75 kA short-circuit breaking capacity for demanding electrical installations.
- Electronic PR121/P-LI protection release provides overload and instantaneous short-circuit protection.
- Three-pole fixed construction for permanent switchboard installations.
- Rear horizontal terminals simplify integration into suitable busbar and switchboard arrangements.
- Designed for operation at rated voltages up to 690 V AC.
Key Features
- ABB SACE Emax E4S series.
- 4000 A rated current.
- Three-pole configuration.
- Fixed circuit-breaker version.
- PR121/P-LI electronic overcurrent release.
- Long-time overload and instantaneous short-circuit protection functions.
- 75 kA Icu and Ics short-circuit breaking capacity up to 690 V AC.
- 75 kA short-time withstand current for 1 s and 3 s.
- 1000 V rated insulation voltage.
- 12 kV rated impulse withstand voltage.
- Rear flat horizontal main terminals.
- Four auxiliary change-over contacts.
Reliable Protection for High-Current Power Distribution
Air circuit breakers such as the ABB SACE Emax E4S provide switching and protection for high-current low-voltage distribution systems. By detecting overload and short-circuit conditions, the electronic trip unit can initiate circuit interruption to protect cables, busbars, switchgear and connected equipment from potentially damaging fault currents.
The PR121/P-LI release combines long-time overload protection with instantaneous short-circuit protection. Together with the E4S circuit breaker's high current and fault-breaking capabilities, this makes the 1SDA056784R1 particularly suitable for main distribution boards, industrial switchboards and other installations requiring dependable high-current circuit protection.
Typical Applications
- Main low-voltage electrical distribution switchboards.
- Industrial power distribution systems.
- Manufacturing and process plants.
- Commercial and infrastructure electrical installations.
- Transformer secondary and main incoming circuit protection.
- High-current feeder protection.
- Power distribution and switchgear assemblies.
Technical Specifications
| Series | SACE Emax / New Emax |
|---|---|
| ABB order code | 1SDA056784R1 |
| Product type | Air circuit breaker |
| Product group | 310513-New Emax |
| Rated current (In) | 4000 A |
| Rated operational current (Ie) | 4000 A |
| Rated uninterrupted current (Iu) | 4000 A |
| 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) | 75 kA up to 690 V AC |
| Rated service short-circuit breaking capacity (Ics) | 75 kA up to 690 V AC |
| Rated short-time withstand current (Icw) | 75 kA for 1 s / 3 s |
| Number of poles | 3 |
| Current type | AC |
| Protection release | PR121/P-LI |
| Release type | Electronic |
| Protection functions | L (overload) and I (instantaneous short-circuit) |
| Short-circuit performance level | S |
| Installation version | Fixed |
| Terminal connection | Rear flat horizontal |
| Auxiliary contacts | 4 change-over contacts |
| Power loss | 360 W |
| Electrical durability | 5000 cycles at Ue ≤ 440 V; 4000 cycles at 500–690 V |
| Mechanical durability | 15000 cycles |
| Product dimensions (W × H × D) | 566 × 418 × 302 mm |
| Net weight | 81 kg |
| EAN | 8015644581244 |
| Standards | IEC |
Frequently Asked Questions
What is the ABB 1SDA056784R1 used for?
The ABB 1SDA056784R1 is a 4000 A air circuit breaker designed for switching and protection in high-current low-voltage electrical distribution systems.
What is the rated current of the ABB E4S 4000 1SDA056784R1?
The circuit breaker has a rated current of 4000 A, making it suitable for high-current industrial and commercial power distribution applications.
What protection release is fitted to this circuit breaker?
The 1SDA056784R1 is fitted with an ABB PR121/P-LI electronic overcurrent release, providing long-time overload and instantaneous short-circuit protection.
What is the short-circuit breaking capacity of the ABB 1SDA056784R1?
The E4S 4000 has a rated ultimate and service short-circuit breaking capacity of 75 kA at operational voltages up to 690 V AC.
Is the ABB 1SDA056784R1 a fixed or withdrawable circuit breaker?
This model is a fixed three-pole circuit breaker equipped with rear horizontal terminals for integration into suitable low-voltage switchboards.
Trusted High-Current Circuit Protection
ABB SACE Emax air circuit breakers are engineered for demanding low-voltage power distribution applications, combining high current-carrying capability, electronic protection and robust switching performance for industrial and commercial electrical systems.
