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1SDA056186R1 ABB E3S1250 PR121/P-LSIG 1250A 4P Fixed Air Circuit Breaker
ABB 1SDA056186R1 is a SACE Emax E3S 1250 four-pole 1250 A fixed air circuit breaker with rear horizontal flat terminals and a PR121/P-LSIG R1250 electronic overcurrent release for comprehensive high-current low-voltage circuit protection.
£11,882.93
Why Choose the ABB E3S1250 PR121/P-LSIG 1250A 4P Fixed Air Circuit Breaker?
The ABB E3S1250 PR121/P-LSIG, order code 1SDA056186R1, is a high-performance SACE Emax air circuit breaker designed for switching and protection in demanding low-voltage power distribution systems. Part of the ABB SACE Emax E3S series, this four-pole fixed circuit breaker is rated at 1250 A and incorporates the PR121/P-LSIG R1250 electronic overcurrent release.
The PR121/P-LSIG trip unit provides long-time overload (L), short-time short-circuit (S), instantaneous short-circuit (I) and earth-fault (G) protection. This comprehensive protection combination helps safeguard cables, busbars, switchgear and connected equipment against overloads, short circuits and earth faults in high-current electrical distribution systems.
This E3S1250 configuration features a four-pole fixed execution with rear horizontal flat terminals. It is rated for operation up to 690 V AC and provides a rated ultimate short-circuit breaking capacity of 75 kA, making it suitable for demanding industrial, commercial and infrastructure switchboard applications.
Key Advantages
- High-performance 1250 A SACE Emax air circuit breaker.
- PR121/P-LSIG R1250 electronic overcurrent release for comprehensive circuit protection.
- LSIG protection covers long-time overload, short-time short-circuit, instantaneous short-circuit and earth-fault conditions.
- Four-pole configuration for compatible four-pole low-voltage distribution systems.
- Fixed execution with rear horizontal flat terminals for permanent switchboard installation.
- 75 kA rated ultimate and service short-circuit breaking capacity across the specified AC voltage range.
Key Features
- ABB SACE Emax E3S 1250 air circuit breaker.
- 1250 A rated current.
- Four-pole configuration.
- PR121/P-LSIG R1250 electronic overcurrent release.
- Long-time overload protection (L).
- Short-time short-circuit protection (S).
- Instantaneous short-circuit protection (I).
- Integrated earth-fault protection (G).
- Fixed circuit breaker execution.
- Rear horizontal flat terminals.
- Four auxiliary contacts with open/closed circuit breaker position indication.
Advanced LSIG Protection for High-Current Power Distribution
Air circuit breakers such as the ABB SACE Emax E3S1250 provide switching and protection for high-current low-voltage distribution circuits. The electronic overcurrent release monitors circuit conditions and initiates breaker operation when configured protection thresholds are exceeded, helping protect cables, busbars, switchgear and connected electrical equipment.
The PR121/P-LSIG release combines long-time overload, short-time short-circuit, instantaneous short-circuit and earth-fault protection within an electronic trip unit. Together with the E3S frame's 1250 A current capability, 75 kA short-circuit performance and four-pole fixed construction, this configuration provides comprehensive protection for main distribution and high-current feeder circuits.
Typical Applications
- Low-voltage main distribution switchboards.
- Industrial power distribution systems.
- Manufacturing and process plant switchgear.
- Commercial building electrical distribution.
- Infrastructure and utility installations.
- Main incomer and high-current feeder protection.
- Four-pole distribution systems requiring earth-fault protection.
- Fixed circuit breaker switchboard assemblies.
Technical Specifications
| Product family | SACE Emax |
|---|---|
| Series / frame | E3S 1250 |
| ABB order code | 1SDA056186R1 |
| Product type | Air circuit breaker |
| Rated current (In) | 1250 A |
| Rated operational current (Ie) | 1250 A |
| Rated uninterrupted current (Iu) | 1250 A |
| Number of poles | 4 |
| Trip unit | PR121/P-LSIG R1250 |
| Release type | Electronic |
| Protection functions | LSIG |
| Long-time protection | L |
| Short-time protection | S |
| Instantaneous protection | I |
| Earth-fault protection | G |
| 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) | 75 kA at 220–690 V AC |
| Rated service short-circuit breaking capacity (Ics) | 75 kA at 220–690 V AC |
| Rated short-time withstand current (Icw) | 75 kA for 1 s |
| Short-circuit performance level | S |
| Execution | Fixed |
| Terminal configuration | Rear horizontal flat terminals |
| Auxiliary contacts | 4 |
| Position indication | Open / closed |
| Electrical durability | 12,000 cycles at ≤440 V and 500–690 V |
| Mechanical durability | 20,000 cycles |
| Power loss | 60 W |
| Standard | IEC |
| Net weight | 90 kg |
| EAN | 8015644575267 |
| HS code | 85362090 |
| Product group | 310513-New Emax |
Frequently Asked Questions
What is the ABB 1SDA056186R1?
The ABB 1SDA056186R1 is a SACE Emax E3S 1250 four-pole fixed air circuit breaker rated at 1250 A, fitted with rear horizontal flat terminals and a PR121/P-LSIG R1250 electronic overcurrent release.
What is the rated current of the ABB E3S1250 PR121/P-LSIG?
The circuit breaker has a rated current of 1250 A and is designed for high-current low-voltage power distribution applications.
What does LSIG protection mean on the PR121/P trip unit?
LSIG denotes long-time overload, short-time short-circuit, instantaneous short-circuit and earth-fault protection, providing comprehensive electronic protection against major distribution-system fault conditions.
How many poles does ABB 1SDA056186R1 have?
The ABB 1SDA056186R1 is a four-pole air circuit breaker designed for compatible four-pole low-voltage distribution systems.
Is the ABB 1SDA056186R1 fixed or withdrawable?
This model is a fixed air circuit breaker with rear horizontal flat terminals for permanent installation within compatible low-voltage switchboards.
Does the ABB 1SDA056186R1 provide earth-fault protection?
Yes. Its PR121/P-LSIG electronic release includes the G earth-fault protection function in addition to long-time, short-time and instantaneous overcurrent protection.
Trusted by Electrical Engineers Worldwide
ABB SACE Emax air circuit breakers are widely used in demanding low-voltage power distribution systems, providing dependable high-current switching and advanced electronic protection for industrial, commercial and infrastructure installations.
