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1SDA055528R1 ABB E4H 4000A 4P PR121/P-LI Withdrawable Air Circuit Breaker Moving Part
ABB 1SDA055528R1 is a SACE Emax E4H 4000 A four-pole withdrawable air circuit breaker moving part with full-size neutral and a PR121/P-LI R4000 electronic overcurrent release.
£42,774.44
Why Choose the ABB E4H/f 4000 PR121/P-LI 1SDA055528R1 Circuit Breaker?
The ABB 1SDA055528R1 is a SACE Emax E4H moving part for a withdrawable air circuit breaker, designed for high-current low-voltage power distribution systems. Rated at 4000 A, this four-pole unit combines the E4H platform with a PR121/P-LI R4000 electronic overcurrent release.
Unlike the fixed E4H variants, the 1SDA055528R1 is the moving part (W MP) of a withdrawable circuit breaker installation. Its withdrawable design allows the breaker moving part to be isolated and removed from its fixed part, supporting inspection, servicing and replacement within appropriately configured SACE Emax switchgear.
The breaker uses a four-pole configuration with full-size neutral and provides long-time overload and instantaneous short-circuit protection through the PR121/P-LI release. It is also equipped with four auxiliary contacts and open/closed position indication, supporting signalling and integration within switchboard control systems.
Key Advantages
- High-current 4000 A SACE Emax E4H circuit breaker moving part.
- Withdrawable construction supports maintenance and switchboard servicing.
- Four-pole configuration with full-size neutral.
- PR121/P-LI R4000 electronic trip unit for overload and instantaneous short-circuit protection.
- High E4H short-circuit performance for demanding distribution applications.
- Equipped with four auxiliary contacts and open/closed position indication.
Key Features
- ABB SACE Emax E4H air circuit breaker moving part.
- 4000 A rated uninterrupted current.
- Four-pole (4P) configuration.
- Full-size neutral.
- Withdrawable (W) execution.
- Moving part (MP) for a withdrawable Emax installation.
- PR121/P-LI R4000 electronic overcurrent release.
- LI protection functions for long-time overload and instantaneous short-circuit protection.
- Four auxiliary contacts for signalling and control.
- Open/closed circuit-breaker position indication.
Withdrawable Protection for High-Current Distribution
Withdrawable air circuit breakers are widely used in major low-voltage switchboards where maintainability and operational flexibility are important. The ABB 1SDA055528R1 forms the moving part of the Emax E4H withdrawable system, allowing the circuit breaker to interface with the corresponding fixed part while retaining the benefits of removable breaker construction.
The PR121/P-LI electronic release provides long-time protection against sustained overload conditions together with instantaneous protection against severe short circuits. Combined with the 4000 A E4H platform, this makes the breaker suitable for protecting high-capacity incoming and distribution circuits.
Typical Applications
- Withdrawable low-voltage distribution switchboards.
- Industrial power distribution systems.
- Main incoming circuit protection.
- High-current feeder circuits.
- Manufacturing and process plants.
- Commercial and infrastructure power systems.
- Power distribution and switchgear assemblies.
Technical Specifications
| Series | SACE Emax |
|---|---|
| ABB order code | 1SDA055528R1 |
| Product type | Air circuit breaker moving part |
| Frame / performance level | E4H |
| Rated uninterrupted current | 4000 A |
| Number of poles | 4P |
| Neutral | Full size |
| Execution | Withdrawable |
| Component | Moving part (MP) |
| Trip unit | PR121/P-LI R4000 |
| Release type | Electronic |
| Protection functions | Long-time and instantaneous (LI) |
| Ultimate short-circuit breaking capacity at 400 V, 50 Hz | 100 kA |
| Overload release setting range | 1250–4000 A |
| Instantaneous short-circuit release setting range | 6000–60000 A |
| Auxiliary contacts | 4 |
| Position indication | Circuit breaker open / closed |
| Degree of protection | IP20 |
| Motor operator | Optional |
| EAN | 8015644568689 |
| Product group | 310513-New Emax |
Frequently Asked Questions
What is the ABB 1SDA055528R1?
It is an ABB SACE Emax E4H 4000 A four-pole moving part for a withdrawable air circuit breaker installation, equipped with a PR121/P-LI R4000 electronic overcurrent release.
Is the ABB 1SDA055528R1 fixed or withdrawable?
The 1SDA055528R1 is a withdrawable circuit breaker moving part (W MP), rather than a fixed circuit breaker.
What is the rated current of the ABB 1SDA055528R1?
The breaker moving part is rated at 4000 A and is designed for high-current low-voltage power distribution applications.
What protection does the PR121/P-LI trip unit provide?
The PR121/P-LI electronic trip unit provides long-time overload protection and instantaneous short-circuit protection.
How many poles does the ABB 1SDA055528R1 have?
The 1SDA055528R1 is a four-pole (4P) configuration with a full-size neutral.
Trusted ABB Power Distribution Protection
ABB SACE Emax air circuit breakers provide purpose-designed switching and electronic protection for demanding low-voltage power distribution systems, with withdrawable configurations supporting flexible integration, servicing and maintenance within industrial switchgear.
