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1SDA055876R1 ABB E2N 1250 PR122/P-LSI 1250 A 3-Pole Withdrawable Air Circuit Breaker Moving Part
ABB 1SDA055876R1 SACE Emax E2N 1250 is a 1250 A three-pole withdrawable air circuit breaker moving part with a PR122/P-LSI electronic release and 65 kA short-circuit breaking capacity at 415 V AC.
£8,602.70
Why Choose the ABB 1SDA055876R1 E2N 1250 Air Circuit Breaker Moving Part?
The ABB 1SDA055876R1 is a SACE Emax E2N 1250 moving part for a withdrawable air circuit breaker, designed for high-current switching and overcurrent protection in demanding low-voltage AC power distribution systems. This three-pole unit has a rated current of 1250 A and is equipped with an electronic PR122/P-LSI R1250 overcurrent release providing long-time, short-time and instantaneous protection.
Part of the established ABB SACE Emax range, the E2N 1250 combines substantial current-carrying capability with strong short-circuit performance and the serviceability of a withdrawable circuit-breaker arrangement. The N performance level provides rated ultimate and service short-circuit breaking capacities of 65 kA at 415 V AC, making this breaker suitable for industrial, commercial and infrastructure distribution systems with significant prospective fault currents.
The 1SDA055876R1 is a three-pole withdrawable (W) moving portion intended for installation with a compatible SACE Emax fixed part. It is rated for operation up to 690 V AC, with a rated insulation voltage of 1000 V and rated impulse withstand voltage of 12 kV. Its withdrawable construction supports maintenance and replacement strategies in critical switchboards where service continuity and dependable circuit protection are important.
Key Advantages
- High-current 1250 A E2N air circuit breaker moving part for demanding low-voltage distribution systems.
- PR122/P-LSI R1250 electronic release provides long-time, short-time and instantaneous protection.
- 65 kA rated ultimate and service short-circuit breaking capacity at 415 V AC.
- Three-pole configuration is suited to three-phase power distribution systems.
- Withdrawable construction facilitates inspection, servicing and replacement within compatible Emax switchgear.
- 55 kA short-time withstand current for 1 s provides robust fault-current performance.
- Maintains 55 kA Icu and Ics at 690 V AC for demanding higher-voltage low-voltage distribution systems.
- LSI protection supports selective coordination between upstream and downstream protective devices.
Key Features
- ABB SACE Emax E2N 1250 air circuit breaker moving part.
- 1250 A rated current.
- 3-pole configuration.
- PR122/P-LSI R1250 electronic overcurrent release.
- LSI functions provide long-time, short-time and instantaneous overcurrent protection.
- Withdrawable (W) circuit-breaker configuration.
- Moving portion for installation with a compatible SACE Emax fixed part.
- 690 V AC rated operational voltage.
- 1000 V rated insulation voltage.
- 12 kV rated impulse withstand voltage.
- 65 kA Icu and Ics at 400/415 V AC.
- 55 kA Icu and Ics at 500–690 V AC.
- 55 kA rated short-time withstand current for 1 s.
- 42 kA rated short-time withstand current for 3 s.
Selective LSI Protection for High-Current Distribution
The ABB SACE Emax E2N 1250 provides switching and electronic overcurrent protection for high-current low-voltage distribution circuits. Its PR122/P-LSI electronic release combines long-time protection against sustained overload conditions, short-time protection for selective fault coordination and instantaneous protection against severe short-circuit currents, helping protect conductors, switchgear and connected equipment.
The withdrawable construction allows the circuit-breaker moving portion to be removed from its compatible fixed part, supporting inspection, maintenance and replacement strategies in critical switchboards. Combined with a 1250 A rating, three-pole configuration and 65 kA short-circuit breaking capacity at 415 V AC, the 1SDA055876R1 is well suited to main incoming and high-current feeder duties requiring strong fault interruption, selectivity and serviceable switchgear construction.
Typical Applications
- Industrial low-voltage distribution switchboards.
- Main incoming circuit protection.
- Three-phase power distribution systems.
- High-current feeder protection.
- Withdrawable switchgear assemblies.
- Manufacturing and process plants.
- Commercial and infrastructure electrical distribution.
- Distribution systems requiring selective LSI overcurrent protection.
Technical Specifications
| Series | SACE Emax |
|---|---|
| ABB order code | 1SDA055876R1 |
| Product type | Air circuit breaker moving part |
| Frame / sub-type | E2 |
| Short-circuit performance level | N |
| Rated current (In) | 1250 A |
| Rated uninterrupted current (Iu) | 1250 A |
| Rated operational current (Ie) | 1250 A |
| Number of poles | 3 |
| 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) at 400/415 V AC | 65 kA |
| Rated service short-circuit breaking capacity (Ics) at 400/415 V AC | 65 kA |
| Rated ultimate short-circuit breaking capacity (Icu) at 500 V AC | 55 kA |
| Rated service short-circuit breaking capacity (Ics) at 500 V AC | 55 kA |
| Rated ultimate short-circuit breaking capacity (Icu) at 690 V AC | 55 kA |
| Rated service short-circuit breaking capacity (Ics) at 690 V AC | 55 kA |
| Rated short-time withstand current (Icw) | 55 kA for 1 s |
| Release | PR122/P-LSI R1250 |
| Release type | Electronic |
| Protection functions | LSI – long-time, short-time and instantaneous |
| Long-time protection (L) | Overload protection |
| Short-time protection (S) | Selective short-circuit protection |
| Instantaneous protection (I) | Instantaneous short-circuit protection |
| Version | Withdrawable |
| Configuration | Moving portion |
| Terminal connection type | Withdrawable circuit breaker |
| Power loss | 130 W |
| Mechanical durability | 25,000 cycles |
| Mechanical operating frequency | 60 cycles per hour |
| Electrical durability at ≤440 V | 15,000 cycles |
| Electrical durability at 500–690 V | 15,000 cycles |
| Electrical operating frequency | 30 cycles per hour |
| Standard | IEC |
| Package gross weight | 59 kg |
| EAN | 8015644572167 |
Frequently Asked Questions
What is the ABB 1SDA055876R1?
The ABB 1SDA055876R1 is the moving portion of a three-pole SACE Emax E2N 1250 withdrawable air circuit breaker, rated at 1250 A and fitted with a PR122/P-LSI R1250 electronic overcurrent release.
What protection release is fitted to the ABB 1SDA055876R1?
The breaker is fitted with a PR122/P-LSI R1250 electronic release, providing long-time, short-time and instantaneous overcurrent protection.
What does LSI protection mean?
LSI denotes long-time, short-time and instantaneous protection. Long-time protection responds to sustained overloads, short-time protection supports selective coordination during short-circuit conditions, and instantaneous protection provides rapid operation during severe faults.
Is the ABB 1SDA055876R1 fixed or withdrawable?
The 1SDA055876R1 is a withdrawable circuit-breaker moving part designed for installation with a compatible ABB SACE Emax fixed part.
What is the short-circuit breaking capacity of the ABB E2N 1250?
The E2N 1250 has rated ultimate and service short-circuit breaking capacities of 65 kA at 400/415 V AC. At 500–690 V AC, both Icu and Ics are 55 kA.
Trusted ABB Protection for Critical Distribution Systems
ABB SACE Emax air circuit breakers provide robust switching and electronic protection for low-voltage power distribution, combining high short-circuit performance, selective LSI protection and serviceable withdrawable construction for demanding industrial and infrastructure applications.
