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1SDA055643R1 ABB E1B 1250 PR122/P-LI 1250 A 4-Pole Fixed Air Circuit Breaker
ABB 1SDA055643R1 is a SACE Emax E1B 1250 A four-pole fixed air circuit breaker with rear flat horizontal terminals and a PR122/P-LI R1250 electronic release providing long-time overload and instantaneous short-circuit protection.
£9,501.14
Why Choose the ABB 1SDA055643R1 E1B 1250 Air Circuit Breaker?
The ABB 1SDA055643R1 is a SACE Emax E1B 1250 air circuit breaker designed for switching and protection in demanding low-voltage power distribution systems. This configuration combines a 1250 A rated uninterrupted current, four-pole fixed construction and ABB's PR122/P-LI R1250 electronic overcurrent release.
The PR122/P-LI release provides long-time overload and instantaneous short-circuit protection, helping safeguard conductors, busbars and connected equipment against damaging overcurrent conditions. The breaker is rated for operation at up to 690 V AC and provides 42 kA rated ultimate and service short-circuit breaking capacities across its principal IEC AC operating voltages.
The 1SDA055643R1 is configured as a four-pole fixed circuit breaker with rear flat horizontal terminals. It is supplied with four auxiliary contacts providing open/closed circuit-breaker position indication, supporting status monitoring and integration into industrial switchboards and electrical supervision systems.
Key Advantages
- Genuine ABB SACE Emax E1B 1250 air circuit breaker.
- 1250 A rated uninterrupted current for high-current low-voltage distribution systems.
- PR122/P-LI R1250 electronic release provides long-time overload and instantaneous short-circuit protection.
- Four-pole fixed construction for permanent installation in compatible switchboards.
- 42 kA Icu and Ics across principal IEC AC operating voltages up to 690 V AC.
- Rear flat horizontal terminals provide a practical connection arrangement for switchgear installation.
- Four auxiliary contacts provide open/closed circuit-breaker position indication.
Key Features
- ABB SACE Emax E1B series.
- 1250 A rated uninterrupted current.
- Four-pole configuration.
- Fixed circuit-breaker construction.
- PR122/P-LI R1250 electronic overcurrent release.
- Long-time overload protection.
- Instantaneous short-circuit protection.
- 690 V AC rated operational voltage.
- 1000 V rated insulation voltage.
- 12 kV rated impulse withstand voltage.
- Rear flat horizontal terminals.
- Four auxiliary contacts with open/closed position indication.
Reliable Protection for High-Current Low-Voltage Distribution
Air circuit breakers such as the ABB SACE Emax E1B provide switching and overcurrent protection for high-current low-voltage distribution systems. By detecting abnormal current conditions and interrupting the circuit when required, the breaker helps protect cables, busbars, switchgear and connected electrical equipment against potentially damaging overload and short-circuit currents.
The PR122/P-LI electronic release provides long-time overload and instantaneous short-circuit protection. Combined with the 1250 A E1B frame, four-pole fixed construction, rear flat horizontal terminals and auxiliary position contacts, the 1SDA055643R1 provides a robust solution for industrial power distribution assemblies.
Typical Applications
- Low-voltage industrial power distribution systems.
- Main and distribution switchboards.
- Four-pole electrical distribution systems.
- High-current feeder protection.
- Transformer and generator distribution installations.
- Manufacturing and process plant switchgear.
- Commercial and infrastructure electrical distribution systems.
Technical Specifications
| Series | SACE Emax |
|---|---|
| ABB order code | 1SDA055643R1 |
| Product designation | E1B1250PR122/P-LIIn=1250A4pFH |
| Product type | Air circuit breaker |
| Sub-type | E1 |
| Short-circuit performance level | B |
| Rated current (In) | 1250 A |
| Rated uninterrupted current (Iu) | 1250 A |
| Rated operational current (Ie) | 1250 A |
| Number of poles | 4 |
| Release | PR122/P-LI |
| Release rating | R1250 / 1250 A |
| Release type | Electronic |
| Protection functions | Long-time overload and instantaneous short-circuit protection |
| Version | Fixed |
| Terminal connection | Rear flat horizontal |
| 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) | 42 kA at 220–690 V AC |
| Rated service short-circuit breaking capacity (Ics) | 42 kA at 220–690 V AC |
| Rated short-time withstand current (Icw) | 42 kA for 1 s |
| Power loss | 150 W |
| Auxiliary contacts | 4 |
| Position indication | Open / closed |
| Product net weight | 62 kg |
| EAN | 8015644569839 |
| Customs tariff number | 85362090 |
| Standard | IEC |
Frequently Asked Questions
What is the ABB 1SDA055643R1?
The ABB 1SDA055643R1 is an E1B 1250 four-pole fixed air circuit breaker rated at 1250 A and fitted with a PR122/P-LI R1250 electronic overcurrent release.
What is the rated current of the ABB 1SDA055643R1?
The ABB 1SDA055643R1 has a rated uninterrupted current of 1250 A.
Which electronic release is fitted to the ABB 1SDA055643R1?
The breaker is fitted with the ABB PR122/P-LI R1250 electronic overcurrent release.
What protection functions does the PR122/P-LI provide?
The LI configuration provides long-time overload protection and instantaneous short-circuit protection.
Is the ABB 1SDA055643R1 fixed or withdrawable?
The 1SDA055643R1 is a fixed four-pole air circuit breaker.
What terminal arrangement does the ABB 1SDA055643R1 use?
The circuit breaker uses rear flat horizontal terminals for connection within compatible low-voltage switchgear.
What is the short-circuit breaking capacity of the ABB 1SDA055643R1?
The E1B breaker provides rated ultimate and service short-circuit breaking capacities of 42 kA across principal IEC AC operating voltages from 220–690 V AC.
Does the ABB 1SDA055643R1 include auxiliary contacts?
Yes. The breaker is supplied with four auxiliary contacts providing open/closed circuit-breaker position indication.
Trusted by Industrial Power Distribution Professionals
ABB SACE Emax air circuit breakers are engineered for dependable switching and protection in demanding low-voltage electrical installations, combining robust construction, high short-circuit performance and electronic overcurrent protection for industrial power distribution systems.
