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1SDA055777R1 ABB E1N 1600 PR121/P-LSI 1600 A 3-Pole Withdrawable Air Circuit Breaker
ABB 1SDA055777R1 E1N 1600 PR121/P-LSI is a 1600 A three-pole withdrawable SACE Emax air circuit breaker with a PR121/P-LSI electronic trip unit for long-time, short-time and instantaneous overcurrent protection.
£8,819.81
Why Choose the ABB E1N 1600 PR121/P-LSI Air Circuit Breaker?
The ABB E1N 1600 PR121/P-LSI, order code 1SDA055777R1, is a high-performance 1600 A three-pole withdrawable air circuit breaker designed for switching and protection in low-voltage power distribution systems. As part of the ABB SACE Emax series, it combines robust high-current switching capability with a PR121/P-LSI electronic overcurrent release for industrial, commercial and infrastructure electrical installations.
The PR121/P-LSI electronic trip unit provides long-time overload, short-time short-circuit and instantaneous short-circuit protection. These adjustable electronic protection functions support effective coordination within low-voltage distribution networks while helping protect cables, busbars and connected electrical equipment against damaging overcurrents.
With a rated current of 1600 A and a three-pole withdrawable configuration, the E1N 1600 is particularly suited to switchboards where maintainability, operational flexibility and reliable high-current protection are required. The withdrawable execution allows the circuit breaker to be isolated from the fixed part of a compatible Emax assembly for inspection, servicing and replacement.
Key Advantages
- Heavy-duty 1600 A air circuit breaker for low-voltage power distribution.
- PR121/P-LSI electronic overcurrent release for comprehensive circuit protection.
- Provides long-time, short-time and instantaneous protection.
- Three-pole withdrawable construction supports maintenance and serviceability.
- E1N performance class is designed for demanding industrial distribution systems.
- Electronic trip technology supports protection coordination and system selectivity.
Key Features
- ABB SACE Emax E1N series.
- 1600 A rated current.
- Three-pole configuration.
- Withdrawable execution.
- PR121/P-LSI R1600 electronic overcurrent release.
- Long-time overload protection.
- Short-time short-circuit protection.
- Instantaneous short-circuit protection.
- Designed for low-voltage switchboard and power distribution applications.
Reliable Protection for Low-Voltage Power Distribution
Air circuit breakers such as the ABB SACE Emax E1N provide switching and overcurrent protection for high-current low-voltage distribution circuits. Electronic trip units continuously monitor circuit current and initiate breaker operation when configured overload or short-circuit thresholds are exceeded.
The PR121/P-LSI release provides three principal overcurrent protection functions without an earth-fault protection function: long-time protection for overloads, short-time protection for selective short-circuit coordination and instantaneous protection against severe short circuits. This makes the breaker well suited to distribution systems requiring flexible and coordinated overcurrent protection.
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 and distribution circuit protection.
Technical Specifications
| Series | SACE Emax E1N |
|---|---|
| ABB order code | 1SDA055777R1 |
| Product type | Air circuit breaker |
| Rated current | 1600 A |
| Number of poles | 3 |
| Execution | Withdrawable |
| Trip unit | PR121/P-LSI R1600 |
| Protection functions | LSI – long-time, short-time and instantaneous protection |
| Series performance class | E1N |
| Application | Low-voltage power distribution |
Frequently Asked Questions
What is the ABB 1SDA055777R1 used for?
It is a 1600 A three-pole air circuit breaker designed for switching and overcurrent protection in low-voltage power distribution systems.
What is the rated current of the ABB E1N 1600 PR121/P-LSI?
The circuit breaker has a rated current of 1600 A.
What protection functions does the PR121/P-LSI provide?
The PR121/P-LSI electronic release provides long-time overload, short-time short-circuit and instantaneous short-circuit protection.
Is the ABB 1SDA055777R1 fixed or withdrawable?
This model is a three-pole withdrawable air circuit breaker designed for use with a compatible ABB SACE Emax fixed part.
Does the PR121/P-LSI include earth-fault protection?
No. The LSI configuration provides long-time, short-time and instantaneous overcurrent protection; earth-fault protection is provided by LSIG versions of the trip unit.
Trusted ABB Power Distribution Technology
ABB SACE Emax air circuit breakers are widely used in low-voltage power distribution systems where dependable switching, electronic overcurrent protection and serviceable withdrawable construction are required.
