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1SDA056373R1 ABB E3H1250 PR122/P-LSIG 1250A 3-Pole Fixed Air Circuit Breaker
ABB 1SDA056373R1 is a SACE Emax E3H1250 1250 A three-pole fixed air circuit breaker with a PR122/P-LSIG electronic trip unit for advanced low-voltage power distribution protection.
£10,577.67
Why Choose the ABB E3H1250 PR122/P-LSIG 1250A Air Circuit Breaker?
The ABB 1SDA056373R1 is a high-performance SACE Emax E3H air circuit breaker (ACB) designed for protection and switching of high-current low-voltage electrical distribution systems. Rated at 1250 A, this three-pole fixed circuit breaker incorporates ABB’s PR122/P-LSIG electronic overcurrent release for comprehensive protection of industrial and commercial power networks.
As part of the ABB SACE Emax range, the E3H1250 combines high short-circuit breaking performance with advanced electronic protection. The PR122/P-LSIG trip unit provides long-time, short-time, instantaneous and earth-fault protection functions, helping safeguard electrical installations against overloads, short circuits and earth faults.
The E3H1250 PR122/P-LSIG has a rated current of 1250 A, a rated operational voltage of up to 690 V AC and an ultimate short-circuit breaking capacity of 100 kA at 400 V AC. This version is supplied as a three-pole fixed circuit breaker with rear horizontal terminals, making it suitable for integration into low-voltage switchboards and power distribution assemblies.
Key Advantages
- High-performance ABB SACE Emax air circuit breaker for low-voltage power distribution.
- 1250 A rated current for demanding industrial and commercial installations.
- PR122/P-LSIG electronic trip unit providing comprehensive circuit protection.
- 100 kA ultimate short-circuit breaking capacity at 400 V AC.
- LSIG protection covers long-time overload, short-time short circuit, instantaneous short circuit and earth fault.
- Three-pole fixed construction designed for integration into electrical switchboards.
Key Features
- ABB SACE Emax E3H1250 air circuit breaker.
- 1250 A rated current.
- Three-pole fixed version.
- PR122/P-LSIG electronic overcurrent release.
- 690 V AC rated operational voltage.
- 100 kA Icu at 400 V AC.
- 85 kA Ics at 400 V AC.
- 75 kA short-time withstand current for 1 s.
- 12 kV rated impulse withstand voltage.
- 1000 V rated insulation voltage.
- Rear horizontal main terminals.
- Four auxiliary change-over contacts and circuit-breaker open/closed position indication.
Advanced Circuit Protection for Power Distribution
Air circuit breakers such as the ABB SACE Emax E3H1250 provide switching, isolation and protection for high-current low-voltage distribution circuits. Their high breaking capacity enables them to safely interrupt substantial fault currents, helping protect switchboards, cables and connected electrical equipment from damage.
The PR122/P-LSIG electronic trip unit enhances protection flexibility by providing long-time overload, short-time, instantaneous and earth-fault protection functions. This makes the 1SDA056373R1 particularly suitable for main incomers, feeders and other critical circuits where selective and dependable protection is required.
Typical Applications
- Low-voltage main distribution switchboards.
- Industrial power distribution systems.
- Main incomer and feeder circuit protection.
- Manufacturing and process plants.
- Commercial and infrastructure electrical installations.
- Power distribution centres and switchgear assemblies.
Technical Specifications
| Product group | 310513-New Emax |
|---|---|
| Series | SACE Emax |
| Order code / MPN | 1SDA056373R1 |
| Product type | Air circuit breaker |
| Rated current | 1250 A |
| Rated operational current | 1250 A |
| Number of poles | 3 |
| Version | Fixed |
| Current type | AC |
| Trip unit | PR122/P-LSIG electronic overcurrent release |
| Protection functions | Long-time, short-time, instantaneous and earth-fault (LSIG) |
| Rated operational voltage | up to 690 V AC |
| Rated insulation voltage (Ui) | 1000 V |
| Rated impulse withstand voltage (Uimp) | 12 kV |
| Rated ultimate short-circuit breaking capacity (Icu) at 400 V AC | 100 kA |
| Rated service short-circuit breaking capacity (Ics) at 400 V AC | 85 kA |
| Rated short-time withstand current (Icw) | 75 kA for 1 s |
| Power loss | 60 W |
| Electrical durability | 12,000 cycles |
| Mechanical durability | 20,000 cycles |
| Main terminal arrangement | Rear horizontal |
| Auxiliary contacts | 4 change-over contacts |
| Motor drive | Optional |
| EAN | 8015644577131 |
Frequently Asked Questions
What is the ABB 1SDA056373R1 used for?
The ABB 1SDA056373R1 is a SACE Emax air circuit breaker used for switching and protecting high-current low-voltage electrical distribution circuits in industrial, commercial and infrastructure installations.
What is the rated current of the ABB E3H1250 1SDA056373R1?
The circuit breaker has a rated current of 1250 A.
What protection functions does the PR122/P-LSIG trip unit provide?
The PR122/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 E3H1250?
The 1SDA056373R1 has a rated ultimate short-circuit breaking capacity of 100 kA at 400 V AC and a rated service short-circuit breaking capacity of 85 kA at 400 V AC.
Is the ABB 1SDA056373R1 a fixed or withdrawable circuit breaker?
This model is a three-pole fixed air circuit breaker and is configured with rear horizontal main terminals for switchboard installation.
Trusted ABB Protection for Critical Power Systems
ABB SACE Emax air circuit breakers are engineered for dependable protection and switching in demanding low-voltage power distribution systems, combining high breaking performance with advanced electronic protection for industrial and commercial installations.
