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1SDA054893R1 ABB UVR-C T4-T5-T6 480–500 V AC Cabled Undervoltage Release
ABB 1SDA054893R1 is a cabled undervoltage release for compatible SACE Tmax T4, T5 and T6 circuit breakers, rated at 480–525 V AC to IEC and 480–500 V AC to UL for fail-safe breaker opening applications.
£240.38
Why Choose the ABB 1SDA054893R1 UVR-C Undervoltage Release?
The ABB 1SDA054893R1 is a cabled undervoltage release (UVR-C) designed for compatible ABB SACE Tmax T4, T5 and T6 moulded case circuit breakers. Rated at 480–525 V AC to IEC and 480–500 V AC to UL, this genuine ABB accessory provides automatic circuit breaker opening when its control voltage falls below the required operating level.
As part of the ABB SACE Tmax T accessory range, the UVR-C provides a fail-safe control function for industrial low-voltage distribution systems. The release is designed to remain energised during normal operation and to initiate circuit breaker opening if the control supply is lost or decreases sufficiently, supporting controlled shutdown and electrical interlocking applications.
The 1SDA054893R1 is the cabled UVR version for Tmax T4, T5 and T6 circuit breakers. Its high-voltage AC control rating makes it suitable for switchboards, machinery and industrial power-distribution systems using compatible control supplies, while its dedicated ABB design ensures integration with the associated Tmax breaker platform.
Key Advantages
- Genuine ABB SACE Tmax cabled undervoltage release.
- Provides automatic breaker opening following loss or excessive reduction of control voltage.
- 480–525 V AC rating to IEC.
- 480–500 V AC rating to UL.
- Compatible with ABB Tmax T4, T5 and T6 circuit breakers.
- Cabled UVR-C construction for integration into electrical control systems.
- Supports fail-safe shutdown and electrical interlocking applications.
Key Features
- ABB SACE Tmax T accessory.
- UVR-C cabled undervoltage release.
- 480–525 V AC control voltage to IEC.
- 480–500 V AC control voltage to UL.
- Designed for Tmax T4, T5 and T6 breaker frames.
- Provides undervoltage-operated circuit breaker opening.
- Suitable for AC control circuits.
- Manufacturer-engineered accessory for compatible Tmax installations.
- Product weight approximately 0.12 kg.
Dependable Undervoltage Control for Tmax Circuit Breakers
An undervoltage release provides a fail-safe method of controlling a circuit breaker according to the presence of an external control voltage. If that voltage disappears or falls below the release operating threshold, the mechanism causes the associated breaker to open, helping prevent equipment from remaining energised during an abnormal supply condition.
The ABB 1SDA054893R1 provides this functionality for compatible Tmax T4, T5 and T6 circuit breakers. Its cabled construction and high-voltage AC control range make it suitable for integration into industrial switchboards, machinery controls, electrical interlocks and automatic shutdown systems.
Typical Applications
- ABB Tmax T4, T5 and T6 circuit breaker installations.
- Industrial low-voltage distribution switchboards.
- Automatic disconnection following control-voltage failure.
- Machine and process control systems.
- Electrical interlocking and fail-safe circuits.
- Industrial power distribution and automation equipment.
Technical Specifications
| Series | SACE Tmax T |
|---|---|
| Product group | 310511-T-Max T4 - T8 |
| Model / designation | UVR-C T4-T5-T6 480...500 Vac |
| Order code | 1SDA054893R1 |
| Product type | Cabled undervoltage release |
| Release designation | UVR-C |
| Compatible circuit breakers | Tmax T4, T5 and T6 |
| Rated control voltage (IEC) | 480–525 V AC |
| Rated control voltage (UL) | 480–500 V AC |
| Current type | AC |
| Function | Undervoltage-operated circuit breaker opening |
| Connection type | Cabled |
| Reference standard | IEC |
| Product weight | approx. 0.12 kg |
Frequently Asked Questions
What is the ABB 1SDA054893R1 used for?
It is a cabled undervoltage release designed to provide automatic opening of compatible ABB Tmax T4, T5 and T6 circuit breakers when its control voltage is lost or falls below the required operating level.
What control voltage is the ABB 1SDA054893R1 rated for?
The UVR-C is rated at 480–525 V AC to IEC and 480–500 V AC to UL.
Which ABB circuit breakers are compatible with this UVR-C?
The 1SDA054893R1 is designed for compatible ABB SACE Tmax T4, T5 and T6 moulded case circuit breakers.
What does UVR-C mean?
UVR identifies an undervoltage release, while the UVR-C designation identifies the cabled version for wired integration with the compatible circuit breaker and control system.
Where is the ABB 1SDA054893R1 typically used?
It is typically used in industrial switchboards, machinery, process-control systems and electrical interlocking applications requiring automatic circuit breaker opening following an undervoltage or control-supply failure.
Trusted ABB Tmax Engineering
ABB SACE Tmax circuit breaker accessories provide coordinated protection and control functions for low-voltage electrical systems, supporting dependable integration with industrial machinery, automation, interlocking and power-distribution applications.
