1SDA054881R1 ABB UVR T4-T5-T6 48 V AC/DC Undervoltage Release

Why Choose the ABB 1SDA054881R1 UVR T4-T5-T6 48 V AC/DC Undervoltage Release?

The ABB 1SDA054881R1 is a 48 V AC/DC undervoltage release (UVR) designed for compatible ABB SACE Tmax T4, T5 and T6 moulded-case circuit breakers. It provides an electrical release function that operates in response to an insufficient control-supply voltage, supporting suitable circuit-breaker protection and control schemes.

ABB identifies this accessory as UVR T4-T5-T6 48 VAC/DC. The unit is rated for both 48 V AC and 48 V DC control supplies and is designed specifically for integration with compatible Tmax T4, T5 and T6 circuit breakers.

An undervoltage release can help prevent a compatible circuit breaker from remaining closed when its monitored control voltage falls below the release operating threshold. The 1SDA054881R1 provides this functionality as a genuine ABB accessory, making it suitable for industrial and commercial switchgear where undervoltage-dependent circuit-breaker operation is required.

Key Advantages

• Provides undervoltage release functionality for compatible ABB Tmax circuit breakers.
• Designed for both 48 V AC and 48 V DC control supplies.
• Compatible with suitable ABB Tmax T4, T5 and T6 circuit breakers.
• Supports circuit-breaker control schemes requiring operation in response to insufficient control voltage.
• Purpose-designed for integration with the corresponding ABB Tmax operating mechanism.
• Genuine ABB accessory manufactured for the established SACE Tmax T platform.

Key Features

• ABB UVR undervoltage release.
• Rated control voltage of 48 V AC.
• Rated control voltage of 48 V DC.
• Suitable for compatible ABB Tmax T4 circuit breakers.
• Suitable for compatible ABB Tmax T5 circuit breakers.
• Suitable for compatible ABB Tmax T6 circuit breakers.
• Designed to applicable IEC requirements.
• Genuine ABB low-voltage circuit-breaker accessory.

Reliable Undervoltage-Dependent Circuit-Breaker Control

An undervoltage release is used where circuit-breaker operation needs to depend on the presence of an adequate control voltage. When the supply to the release falls sufficiently, the accessory acts on the compatible circuit-breaker mechanism, providing an important control function for installations where equipment should not remain energised during defined undervoltage conditions.

The ABB 1SDA054881R1 is designed for a 48 V AC/DC control supply and is compatible with suitable Tmax T4, T5 and T6 circuit breakers. Its dual AC/DC voltage rating makes it suitable for a variety of industrial control architectures using a 48 V control supply.

Typical Applications

• Undervoltage-dependent control of compatible ABB Tmax circuit breakers.
• Industrial low-voltage switchboards and distribution panels.
• 48 V AC or DC electrical control systems.
• Manufacturing and process power distribution equipment.
• Commercial and industrial switchgear assemblies.
• Control schemes requiring circuit-breaker response to loss or reduction of control voltage.