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1SDA104946R1 ABB YU XT5-XT6 480…525 V AC Undervoltage Release
ABB 1SDA104946R1 is a 480…525 V AC YU undervoltage release for compatible SACE Tmax XT5 and XT6 fixed and plug-in circuit breakers.
£112.54
Why Choose the ABB 1SDA104946R1 YU XT5-XT6 480...525 V AC Undervoltage Release?
The ABB 1SDA104946R1 is a YU undervoltage release designed for compatible ABB SACE Tmax XT5 and XT6 moulded-case circuit breakers. Rated for 480...525 V AC, it provides voltage-dependent circuit-breaker operation for applications where the breaker must respond to a significant loss or reduction of its monitored control supply.
The YU undervoltage release is energised during normal service and interacts with the circuit-breaker mechanism when its supply voltage falls below the permitted operating level. This functionality is useful in electrical systems where equipment should not remain energised, or should not be reclosed, when the control voltage is insufficient.
As part of the ABB SACE Tmax XT remote-control accessory range, the 1SDA104946R1 is the uncabled YU version for compatible XT5 and XT6 fixed and plug-in configurations. Its dedicated ABB design provides correct mechanical and electrical integration with the associated circuit-breaker platform.
Key Advantages
- Genuine ABB SACE Tmax XT undervoltage release.
- Compatible with both XT5 and XT6 circuit-breaker frames.
- Rated for 480...525 V AC operation.
- Provides automatic breaker response to an unacceptable reduction or loss of control voltage.
- Helps prevent circuit-breaker closing when adequate voltage is not available to the release.
- Purpose-designed for integration with ABB SACE Tmax XT circuit breakers.
Key Features
- ABB SACE Tmax XT accessory range.
- YU undervoltage release.
- Compatible with XT5 and XT6.
- 480...525 V AC rated voltage.
- AC operating supply.
- Uncabled accessory version.
- Designed for compatible fixed and plug-in circuit-breaker configurations.
- Part of the Tmax XT remote-control accessory system.
- Suitable for IEC and UL circuit-breaker systems.
Reliable Undervoltage Operation for Tmax XT5 and XT6
An undervoltage release provides a voltage-sensitive interface with the circuit-breaker operating mechanism. During normal conditions the release is supplied at the appropriate voltage; if that supply falls sufficiently, the mechanism causes the associated circuit breaker to open. The release also prevents normal closing while its energising voltage remains inadequate.
The ABB 1SDA104946R1 provides this functionality for compatible SACE Tmax XT5 and XT6 installations using a 480...525 V AC supply. With an ABB-specified opening time of 50 ms, it is suited to switchboards and industrial distribution systems where breaker status must respond automatically to control-voltage conditions.
Typical Applications
- ABB SACE Tmax XT5 circuit-breaker installations.
- ABB SACE Tmax XT6 circuit-breaker installations.
- Industrial low-voltage switchboards.
- Power distribution and protection panels.
- Automated machinery and process-control systems.
- Installations requiring circuit-breaker response to control-supply undervoltage or loss.
Technical Specifications
| Series | SACE Tmax XT |
|---|---|
| Order code | 1SDA104946R1 |
| Catalogue code | KXTFYU7 |
| Product type | Undervoltage release |
| Release designation | YU |
| Compatible frames | XT5, XT6 |
| Version | Uncabled |
| Compatible execution | Fixed / plug-in |
| Rated voltage | 480...525 V AC |
| Current type | AC |
| Rated pilot supply voltage at 50 Hz | 480...525 V AC |
| Rated pilot supply voltage at 60 Hz | 480...525 V AC |
| Maximum inrush power | 440 VA |
| Average holding power | 6 VA |
| Opening time | 50 ms |
| Standards | IEC, UL |
| GTIN / EAN | 8015644070380 |
| Product net weight | 0.12 kg |
Frequently Asked Questions
What is the ABB 1SDA104946R1 used for?
The ABB 1SDA104946R1 is a YU undervoltage release used with compatible ABB SACE Tmax XT5 and XT6 circuit breakers to provide voltage-dependent breaker operation when the release supply falls below the required level.
What voltage is the ABB 1SDA104946R1 rated for?
The YU release is rated for a 480...525 V AC supply at both 50 Hz and 60 Hz.
Which circuit breakers are compatible with the ABB 1SDA104946R1?
The release is designed for compatible ABB SACE Tmax XT5 and XT6 circuit breakers, with this uncabled version intended for fixed and plug-in configurations.
What does YU mean on the ABB 1SDA104946R1?
YU identifies ABB's undervoltage release, an electrical accessory that interacts with the circuit-breaker mechanism according to the voltage applied to the release.
What is the opening time of the ABB YU XT5-XT6 release?
ABB specifies an opening time of 50 ms for the YU undervoltage release on XT5 and XT6 circuit breakers.
Engineered for ABB SACE Tmax XT Systems
ABB SACE Tmax XT undervoltage releases provide voltage-dependent circuit-breaker control, helping switchboard builders integrate dependable automatic opening and undervoltage response functions into industrial low-voltage distribution systems.
