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1SDA074542R1 ABB PR331/P-LSI T8 Electronic Trip Unit
ABB 1SDA074542R1 is a PR331/P-LSI electronic trip unit designed for compatible SACE Tmax T8 circuit breakers, providing long-time, short-time and instantaneous overcurrent protection.
£1,900.06
Why Choose the ABB PR331/P-LSI T8 1SDA074542R1 Electronic Trip Unit?
The ABB SG.EL.PR331/P-LSI T8 1SDA074542R1 is an electronic protection trip unit designed for use with compatible ABB SACE Tmax T8 moulded-case circuit breakers. As part of ABB's protection system for the Tmax T8 series, the PR331/P provides electronic overcurrent protection for demanding low-voltage power distribution applications.
The PR331/P-LSI configuration provides long-time, short-time and instantaneous protection functions. These functions enable the trip unit to respond to sustained overloads and short-circuit conditions while supporting coordinated protection between upstream and downstream devices in industrial electrical distribution systems.
Designed specifically for the ABB SACE Tmax T8 platform, the 1SDA074542R1 is suitable for circuit-breaker configurations requiring an electronic LSI protection release. Its dedicated ABB design provides compatibility with the intended T8 breaker platform and supports reliable protection of cables, busbars and connected electrical equipment.
Key Advantages
- Genuine ABB PR331/P electronic protection trip unit.
- Designed specifically for compatible ABB SACE Tmax T8 circuit breakers.
- LSI protection functionality for comprehensive overcurrent protection.
- Long-time protection helps safeguard circuits against sustained overload conditions.
- Short-time and instantaneous functions provide protection against short-circuit faults.
- Electronic protection supports coordinated and selective low-voltage distribution systems.
Key Features
- ABB PR331/P-LSI electronic trip unit.
- Designed for the SACE Tmax T8 series.
- Long-time (L) protection.
- Short-time (S) protection.
- Instantaneous (I) protection.
- Electronic overcurrent protection technology.
- Suitable for demanding low-voltage power distribution applications.
- Designed for integration with compatible Tmax T8 circuit breakers.
- ABB order code 1SDA074542R1.
Electronic LSI Protection for Tmax T8 Circuit Breakers
Electronic trip units continuously monitor current conditions and initiate circuit-breaker tripping when configured protection thresholds are exceeded. Compared with basic protection arrangements, electronic releases provide controlled protection characteristics that can help engineers coordinate protective devices throughout a low-voltage distribution system.
The PR331/P-LSI combines long-time protection for overload conditions with short-time and instantaneous protection for short circuits. This combination makes the 1SDA074542R1 suitable for compatible Tmax T8 installations where dependable electronic overcurrent protection and system coordination are required.
Typical Applications
- ABB SACE Tmax T8 circuit-breaker installations.
- Industrial low-voltage switchboards.
- Main and sub-main power distribution systems.
- High-current feeder circuit protection.
- Transformer secondary distribution systems.
- Manufacturing and process-industry electrical installations.
- Distribution systems requiring electronic LSI protection.
Technical Specifications
| Series | SACE Tmax T8 |
|---|---|
| ABB order code | 1SDA074542R1 |
| ABB product group | 310511-T-Max T4 - T8 |
| Product type | Electronic circuit breaker trip unit |
| Trip unit | PR331/P |
| Protection characteristic | LSI |
| Long-time protection | Yes |
| Short-time protection | Yes |
| Instantaneous protection | Yes |
| Compatibility | ABB SACE Tmax T8 |
Frequently Asked Questions
What is the ABB 1SDA074542R1 used for?
The ABB 1SDA074542R1 is an electronic trip unit for compatible ABB SACE Tmax T8 circuit breakers, providing protection against overload and short-circuit conditions.
What protection functions does the PR331/P-LSI provide?
The PR331/P-LSI provides long-time, short-time and instantaneous protection, commonly identified by the abbreviation LSI.
What does LSI mean on the ABB PR331/P?
LSI identifies the trip unit's long-time (L), short-time (S) and instantaneous (I) overcurrent protection functions.
Which circuit breaker series is the ABB 1SDA074542R1 designed for?
The 1SDA074542R1 is designed for compatible ABB SACE Tmax T8 moulded-case circuit breakers.
Where is the ABB PR331/P-LSI T8 typically used?
The trip unit is typically used in industrial low-voltage power distribution systems where compatible Tmax T8 circuit breakers require electronic overload and short-circuit protection.
Advanced ABB Circuit Protection Technology
ABB electronic trip units provide configurable protection for low-voltage power distribution systems, helping engineers coordinate circuit protection and safeguard electrical equipment in demanding industrial and commercial installations.
