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1SDA055759R1 ABB E1N1250 PR123/P-LSIG 1250 A 4-Pole Withdrawable Air Circuit Breaker
ABB 1SDA055759R1 SACE New Emax E1N1250 four-pole withdrawable air circuit breaker moving part with 1250 A rated current, PR123/P-LSIG electronic protection and 50 kA short-circuit breaking capacity.
£16,811.65
Why Choose the ABB 1SDA055759R1 E1N1250 Air Circuit Breaker Moving Part?
The ABB 1SDA055759R1 is a high-performance SACE Emax E1N1250 air circuit breaker (ACB) moving part designed for reliable switching and protection in demanding low-voltage electrical distribution systems. As part of the ABB New Emax series, this four-pole withdrawable breaker moving portion combines a rated current of 1250 A with the advanced PR123/P-LSIG electronic overcurrent release.
The PR123/P-LSIG trip unit provides comprehensive long-time (L), short-time (S), instantaneous (I) and earth-fault (G) protection. This advanced electronic release enables accurate protection against overloads, short circuits and earth faults while supporting selective coordination in industrial, commercial and infrastructure power distribution systems.
The 1SDA055759R1 is configured as the moving part of a four-pole withdrawable E1N1250 circuit breaker. It has a rated operational voltage of 690 V AC and a rated ultimate short-circuit breaking capacity of 50 kA, with four auxiliary contacts and open/closed position indication for integration into low-voltage switchgear and control systems.
Key Advantages
- Genuine ABB SACE Emax E1N1250 withdrawable circuit breaker moving part.
- 1250 A rated current for high-current electrical distribution systems.
- Four-pole configuration for switching and protection of four conductors.
- Advanced PR123/P-LSIG electronic overcurrent release.
- Provides long-time, short-time, instantaneous and earth-fault protection.
- 50 kA ultimate short-circuit breaking capacity at rated AC operating voltages.
- Withdrawable construction supports convenient isolation, maintenance and replacement.
Key Features
- ABB SACE New Emax E1N1250 series.
- 1250 A rated uninterrupted current.
- Four-pole withdrawable configuration.
- PR123/P-LSIG R1250 electronic trip unit.
- Long-time overload protection.
- Short-time short-circuit protection.
- Instantaneous short-circuit protection.
- Integrated earth-fault protection.
- 690 V AC rated operational voltage.
- 50 kA rated ultimate short-circuit breaking capacity (Icu).
- 50 kA rated service short-circuit breaking capacity (Ics).
- 50 kA short-time withstand current for 1 s.
- Four auxiliary contacts with open/closed position indication.
- Withdrawable construction for integration with the appropriate E1 fixed part.
Reliable Circuit Protection for Power Distribution
Air circuit breakers such as the ABB SACE Emax E1N1250 provide switching, isolation and protection for high-current low-voltage distribution circuits. The electronic protection release continuously monitors electrical conditions and initiates circuit-breaker operation when configured overload, short-circuit or earth-fault thresholds are exceeded.
The PR123/P-LSIG release combines comprehensive electronic protection with measurement capabilities for sophisticated electrical distribution applications. Its long-time, short-time, instantaneous and earth-fault functions support coordinated protection throughout complex networks, while the withdrawable design allows the breaker moving part to be isolated and removed from its compatible fixed portion for inspection and servicing.
Typical Applications
- Industrial low-voltage switchboards and distribution systems.
- Withdrawable power distribution assemblies.
- Main incoming and feeder circuit protection.
- Manufacturing and process industry electrical systems.
- Commercial building power distribution.
- Infrastructure and utility electrical installations.
Technical Specifications
| Series | SACE New Emax E1N |
|---|---|
| Order code / MPN | 1SDA055759R1 |
| ABB product group | 310513-New Emax |
| Product type | Air circuit breaker moving part |
| Breaker frame | E1N1250 |
| Rated current | 1250 A |
| Rated operational current (Ie) | 1250 A |
| Rated uninterrupted current (Iu) | 1250 A |
| Number of poles | 4 |
| Current type | AC |
| 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) | 50 kA |
| Rated service short-circuit breaking capacity (Ics) | 50 kA |
| Rated short-time withstand current (Icw) | 50 kA for 1 s; 36 kA for 3 s |
| Trip unit | PR123/P-LSIG R1250 |
| Release type | Electronic |
| Protection functions | L (long-time), S (short-time), I (instantaneous) and G (earth fault) |
| Short-circuit performance level | N |
| Construction | Withdrawable moving part |
| Auxiliary contacts | 4 |
| Open/closed position indication | Yes |
| Power loss | 230 W |
| Electrical durability at ≤440 V | 10,000 cycles |
| Electrical durability at 500–690 V | 8,000 cycles |
| Mechanical durability | 25,000 cycles |
| Dimensions (W × H × D) | 414 × 461 × 396.5 mm |
| Net weight | 54 kg |
| Standard | IEC |
| EAN | 8015644570996 |
Frequently Asked Questions
What is the ABB 1SDA055759R1 used for?
The ABB 1SDA055759R1 is a 1250 A four-pole withdrawable air circuit breaker moving part designed for switching and protecting low-voltage electrical distribution systems.
What protection functions does the ABB 1SDA055759R1 provide?
The fitted PR123/P-LSIG electronic trip unit provides long-time overload, short-time short-circuit, instantaneous short-circuit and earth-fault protection.
What is the rated current of the ABB 1SDA055759R1?
The E1N1250 circuit breaker moving part has a rated current of 1250 A.
How many poles does the ABB 1SDA055759R1 have?
The 1SDA055759R1 is a four-pole E1N1250 circuit breaker moving part designed for four-pole low-voltage distribution systems.
What is the short-circuit breaking capacity of the ABB 1SDA055759R1?
The breaker has a rated ultimate short-circuit breaking capacity of 50 kA at AC operating voltages up to 690 V AC.
Trusted by Electrical Professionals Worldwide
ABB SACE Emax air circuit breakers are designed for dependable switching and protection in demanding low-voltage power distribution systems, combining high-current performance, advanced electronic protection and flexible withdrawable switchgear integration.
