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1SDA055776R1 ABB E1N 1600 PR121/P-LI 1600 A 3-Pole Withdrawable Air Circuit Breaker
ABB 1SDA055776R1 E1N 1600 PR121/P-LI is a 1600 A three-pole withdrawable SACE Emax air circuit breaker moving part with a PR121/P-LI electronic release for low-voltage power distribution protection.
£8,625.20
Why Choose the ABB E1N 1600 PR121/P-LI Air Circuit Breaker?
The ABB E1N 1600 PR121/P-LI, order code 1SDA055776R1, is a high-performance 1600 A three-pole withdrawable air circuit breaker moving part designed for protection and switching in low-voltage power distribution systems. As part of the ABB SACE Emax series, it combines robust high-current switching capability with the PR121/P-LI electronic overcurrent release for industrial, commercial and infrastructure electrical installations.
The PR121/P-LI electronic trip unit provides long-time overload and instantaneous short-circuit protection. This electronic protection system helps safeguard cables, busbars and connected equipment while allowing the breaker to form part of a coordinated low-voltage protection system.
With a rated uninterrupted current of 1600 A, a three-pole withdrawable configuration and an E1N short-circuit performance level, this breaker is suited to demanding switchboards where maintainability and reliable high-current protection are important. At 415 V AC, the E1N 1600 platform provides a rated ultimate short-circuit breaking capacity of 50 kA and a 50 kA short-time withstand current for 1 s.
Key Advantages
- Heavy-duty 1600 A air circuit breaker moving part for low-voltage distribution.
- PR121/P-LI electronic overcurrent release for accurate circuit protection.
- Provides long-time overload and instantaneous short-circuit protection.
- Three-pole withdrawable construction supports serviceability and switchboard maintenance.
- 50 kA ultimate breaking capacity at 415 V AC for demanding distribution applications.
- Four auxiliary change-over contacts support signalling and control integration.
Key Features
- ABB SACE Emax E1N series.
- 1600 A rated uninterrupted current.
- Three-pole configuration.
- Withdrawable circuit-breaker moving part.
- PR121/P-LI R1600 electronic overcurrent release.
- LI protection: long-time overload and instantaneous short-circuit protection.
- 690 V AC rated operational voltage.
- 1000 V rated insulation voltage.
- 12 kV rated impulse withstand voltage.
- 50 kA Icu at 415 V AC.
- 50 kA Icw for 1 s.
- Four auxiliary change-over contacts and open/closed position indication.
Reliable Protection for Low-Voltage Power Distribution
Air circuit breakers such as the ABB SACE Emax E1N provide high-current switching and overcurrent protection for low-voltage distribution networks. The withdrawable arrangement allows the circuit-breaker moving part to be disconnected from its fixed section, supporting inspection and maintenance in suitably configured switchboards.
The PR121/P-LI release combines long-time overload protection with instantaneous short-circuit protection. Together with the E1N platform's high short-circuit capability, this makes the 1SDA055776R1 suitable for installations requiring dependable feeder and distribution protection with electronic trip technology.
Typical Applications
- Industrial low-voltage switchboards.
- Main power distribution panels.
- Manufacturing and process plants.
- Commercial and infrastructure electrical distribution.
- Transformer secondary distribution systems.
- High-current feeder protection.
Technical Specifications
| Series | SACE Emax E1N |
|---|---|
| ABB order code | 1SDA055776R1 |
| Product type | Air circuit breaker moving part |
| Rated uninterrupted current (Iu) | 1600 A |
| Rated operational current (Ie) | 1600 A |
| Number of poles | 3 |
| Execution | Withdrawable |
| Trip unit | PR121/P-LI R1600 |
| Protection functions | LI – long-time overload and instantaneous short-circuit protection |
| 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 415 V AC | 50 kA |
| Rated service short-circuit breaking capacity (Ics) at 415 V AC | 50 kA |
| Rated short-time withstand current (Icw) | 50 kA for 1 s |
| Auxiliary contacts | 4 change-over contacts |
| Position indication | Circuit breaker open / closed |
| Standard | IEC |
Frequently Asked Questions
What is the ABB 1SDA055776R1 used for?
It is a 1600 A three-pole air circuit breaker moving part designed for switching and overcurrent protection in low-voltage power distribution systems.
What is the rated current of the ABB E1N 1600 PR121/P-LI?
The circuit breaker has a rated uninterrupted current of 1600 A.
What protection functions does the PR121/P-LI provide?
The PR121/P-LI electronic release provides long-time overload and instantaneous short-circuit protection.
Is the ABB 1SDA055776R1 fixed or withdrawable?
This model is the three-pole withdrawable moving part of an ABB SACE Emax E1N air circuit breaker system.
What is the short-circuit breaking capacity of this E1N 1600 breaker?
The E1N 1600 has a rated ultimate short-circuit breaking capacity of 50 kA at 415 V AC.
Trusted ABB Power Distribution Technology
ABB SACE Emax air circuit breakers are engineered for dependable switching and protection in demanding low-voltage power distribution systems, combining robust construction, withdrawable configurations and electronic overcurrent protection for industrial and infrastructure applications.
