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1SDA055721R1 ABB E1N 800 PR121/P-LSI 800 A 4-Pole Withdrawable Air Circuit Breaker Moving Part
ABB 1SDA055721R1 is a SACE Emax E1N 800 A four-pole withdrawable air circuit breaker moving part with a PR121/P-LSI R800 electronic overcurrent release providing LSI protection for low-voltage power distribution systems.
£10,042.67
Why Choose the ABB 1SDA055721R1 E1N 800 Air Circuit Breaker?
The ABB 1SDA055721R1 is a SACE Emax E1N 800 air circuit breaker moving part designed for dependable switching and protection in low-voltage power distribution systems. Rated at 800 A, this four-pole withdrawable configuration incorporates a PR121/P-LSI electronic overcurrent release for long-time overload, short-time short-circuit and instantaneous short-circuit protection.
As part of the proven ABB SACE Emax range, the E1N 800 combines robust high-current switching capability with electronic protection for demanding industrial, commercial and infrastructure installations. The PR121/P-LSI R800 release provides LSI protection functions, enabling coordinated protection against sustained overloads and different levels of short-circuit current.
This configuration is the moving part for a four-pole withdrawable E1N 800 circuit breaker and is supplied with four auxiliary contacts plus circuit-breaker open/closed position indication. Its withdrawable construction supports convenient servicing and replacement within compatible SACE Emax switchgear, while the E1N platform provides a rated short-circuit breaking capacity of 50 kA at 400 V AC.
Key Advantages
- Heavy-duty 800 A SACE Emax air circuit breaker moving part for low-voltage distribution.
- Four-pole withdrawable configuration for serviceable switchboard installations.
- Advanced PR121/P-LSI R800 electronic overcurrent release.
- LSI functionality provides long-time, short-time and instantaneous protection.
- 50 kA rated short-circuit breaking capacity at 400 V AC.
- Four auxiliary contacts provide useful circuit-breaker status signalling.
- Withdrawable moving-part construction supports convenient maintenance and replacement.
Key Features
- ABB SACE Emax E1N 800 circuit breaker platform.
- 800 A rated current.
- Four-pole configuration.
- Withdrawable (W) execution.
- Moving part (MP) configuration.
- PR121/P-LSI R800 electronic overcurrent release.
- Long-time, short-time and instantaneous protection functions.
- Four auxiliary change-over contacts.
- Circuit-breaker open/closed position indication.
- Designed for compatible ABB SACE Emax withdrawable switchgear.
Advanced Protection for Low-Voltage Power Distribution
Air circuit breakers such as the ABB SACE Emax E1N are designed to switch and protect high-current low-voltage distribution circuits. The electronic overcurrent release supervises current conditions so that the breaker can respond to overloads and short circuits before excessive current causes serious damage to conductors, busbars and connected electrical equipment.
The PR121/P-LSI release provides long-time overload, short-time short-circuit and instantaneous short-circuit protection. Combined with the E1N 800 platform, four-pole arrangement and withdrawable moving-part construction, this makes the ABB 1SDA055721R1 particularly suitable for main distribution and feeder applications where dependable electronic protection and convenient switchgear serviceability are required.
Typical Applications
- Main low-voltage switchboards and distribution boards.
- Industrial power distribution systems.
- Commercial and infrastructure electrical installations.
- Main incomer and feeder circuit protection.
- Manufacturing and process plant switchgear.
- Four-pole withdrawable switchgear requiring LSI electronic protection.
Technical Specifications
| Series | SACE Emax |
|---|---|
| Frame | E1N 800 |
| Order code | 1SDA055721R1 |
| EAN | 8015644570613 |
| Product type | Air circuit breaker moving part |
| Rated current (In) | 800 A |
| Rated permanent current (Iu) | 800 A |
| Number of poles | 4 |
| Execution | Withdrawable (W) |
| Configuration | Moving part (MP) |
| Trip unit | PR121/P-LSI R800 |
| Release type | Electronic overcurrent release |
| Protection functions | Long-time, short-time and instantaneous (LSI) |
| Rated voltage | 690 V AC |
| Rated short-circuit breaking capacity (Icu) at 400 V | 50 kA |
| Overload release setting range | 320–800 A |
| Short-time delayed short-circuit setting range | 800–8000 A |
| Instantaneous short-circuit setting range | 1200–12000 A |
| Integrated earth-fault protection | No |
| Auxiliary contacts | 4 change-over contacts |
| Position indication | Circuit breaker open / closed |
| Current type | AC |
| Electrical durability | 10000 cycles |
| Mechanical durability | 25000 cycles |
| Product net width | 414 mm |
| Product net height | 461 mm |
| Product net depth | 396.5 mm |
| Product net weight | 54 kg |
| ABB product group | 310513-New Emax |
Frequently Asked Questions
What is the ABB 1SDA055721R1?
The ABB 1SDA055721R1 is a SACE Emax E1N 800 four-pole withdrawable air circuit breaker moving part rated at 800 A and equipped with a PR121/P-LSI R800 electronic overcurrent release.
What is the current rating of the ABB 1SDA055721R1?
The ABB 1SDA055721R1 has a rated current of 800 A.
What protection functions does the PR121/P-LSI trip unit provide?
The PR121/P-LSI electronic release provides long-time overload, short-time short-circuit and instantaneous short-circuit protection.
How many poles does the ABB 1SDA055721R1 have?
The ABB 1SDA055721R1 has a four-pole configuration for low-voltage power distribution applications.
Is the ABB 1SDA055721R1 fixed or withdrawable?
The 1SDA055721R1 is a withdrawable circuit breaker moving part designed for use with the corresponding fixed portion of compatible ABB SACE Emax switchgear.
What is the short-circuit breaking capacity of the ABB 1SDA055721R1?
The E1N 800 platform has a rated short-circuit breaking capacity of 50 kA at 400 V AC.
Trusted by Electrical Engineers Worldwide
ABB SACE Emax air circuit breakers are engineered for reliable switching and protection in demanding low-voltage power distribution systems, combining robust construction, electronic overcurrent protection and serviceable withdrawable configurations for industrial, commercial and infrastructure applications.
