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1SDA055644R1 ABB E1B 1250 PR122/P-LSI 1250 A 4-Pole Fixed Air Circuit Breaker
ABB 1SDA055644R1 is a SACE Emax E1B 1250 A four-pole fixed air circuit breaker with rear horizontal terminals and a PR122/P-LSI R1250 electronic release providing long-time, short-time and instantaneous overcurrent protection.
£10,077.44
Why Choose the ABB 1SDA055644R1 E1B 1250 Air Circuit Breaker?
The ABB 1SDA055644R1 is a SACE Emax E1B 1250 air circuit breaker designed for switching and protection in demanding low-voltage power distribution systems. Identified as E1B1250PR122/P-LSIIn=1250A4pF, this configuration combines a 1250 A rated uninterrupted current, four-pole fixed construction and ABB's PR122/P-LSI R1250 electronic overcurrent release.
The PR122/P-LSI release provides long-time, short-time and instantaneous protection, helping protect conductors, busbars and connected equipment against overload and short-circuit conditions. The breaker has a rated voltage of 690 V AC and a rated ultimate short-circuit breaking capacity of 42 kA at 400 V AC.
The 1SDA055644R1 is a four-pole fixed circuit breaker with rear horizontal terminals. It is fitted with four auxiliary change-over contacts and 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-LSI R1250 electronic release provides long-time, short-time and instantaneous protection.
- Four-pole fixed construction for permanent installation in compatible switchboards.
- 42 kA rated ultimate short-circuit breaking capacity at 400 V AC.
- Rear horizontal terminals provide a practical connection arrangement for switchgear installation.
- Four auxiliary change-over 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-LSI R1250 electronic overcurrent release.
- Long-time overload protection.
- Short-time short-circuit protection.
- Instantaneous short-circuit protection.
- 690 V AC rated voltage.
- Rear horizontal terminals.
- Four auxiliary change-over contacts.
- Open/closed circuit-breaker position indication.
- Optional motor drive capability.
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-LSI electronic release combines long-time overload, short-time short-circuit and instantaneous short-circuit protection. Together with the 1250 A E1B frame, four-pole fixed construction, rear horizontal terminals and auxiliary position contacts, the 1SDA055644R1 provides a robust protection 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-fed distribution systems.
- Manufacturing and process plant switchgear.
- Commercial and infrastructure electrical distribution.
- Installations requiring adjustable LSI overcurrent protection.
Technical Specifications
| Series | SACE Emax |
|---|---|
| ABB order code | 1SDA055644R1 |
| Product designation | E1B1250PR122/P-LSIIn=1250A4pF |
| Product type | Air circuit breaker |
| Frame | E1B 1250 |
| Rated uninterrupted current (Iu) | 1250 A |
| Number of poles | 4 |
| Release | PR122/P-LSI |
| Release rating | R1250 / 1250 A |
| Release type | Electronic overcurrent release |
| Protection functions | Long-time, short-time and instantaneous protection |
| Overload release current setting | 500–1250 A |
| Instantaneous short-circuit release adjustment | 1875–18750 A |
| Version | Fixed |
| Terminal connection | Rear horizontal |
| Rated voltage | 690 V AC |
| Rated ultimate short-circuit breaking capacity (Icu) at 400 V AC | 42 kA |
| Integrated ground-fault protection | No |
| Auxiliary contacts | 4 change-over contacts |
| Position indication | Open / closed |
| Motor drive integrated | No |
| Motor drive | Optional |
| Product net weight | 62 kg |
| EAN | 8015644569846 |
| Customs tariff number | 85362090 |
Frequently Asked Questions
What is the ABB 1SDA055644R1?
The ABB 1SDA055644R1 is an E1B 1250 four-pole fixed air circuit breaker rated at 1250 A and fitted with a PR122/P-LSI R1250 electronic overcurrent release.
What is the rated current of the ABB 1SDA055644R1?
The ABB 1SDA055644R1 has a rated uninterrupted current of 1250 A.
Which electronic release is fitted to the ABB 1SDA055644R1?
The breaker is fitted with the ABB PR122/P-LSI R1250 electronic overcurrent release.
What protection functions does the PR122/P-LSI provide?
The LSI configuration provides long-time overload, short-time short-circuit and instantaneous short-circuit protection.
Does the ABB 1SDA055644R1 provide ground-fault protection?
No. This PR122/P-LSI configuration provides LSI protection functions and does not include integrated ground-fault protection.
Is the ABB 1SDA055644R1 fixed or withdrawable?
The 1SDA055644R1 is a fixed four-pole air circuit breaker.
What terminal arrangement does the ABB 1SDA055644R1 use?
The breaker uses rear horizontal terminals for connection within compatible low-voltage switchgear.
What is the short-circuit breaking capacity of the ABB 1SDA055644R1?
The breaker has a rated ultimate short-circuit breaking capacity of 42 kA at 400 V AC.
Does the ABB 1SDA055644R1 include auxiliary contacts?
Yes. The breaker is fitted with four auxiliary change-over contacts and provides 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 with advanced electronic overcurrent protection and practical signalling functionality for industrial power distribution systems.
