1SDA101984R1 ABB UVD XT5-XT6 48–60 V AC/DC Undervoltage Release Delay Device

Why Choose the ABB UVD XT5-XT6 48–60 V AC/DC 1SDA101984R1?

The ABB 1SDA101984R1 is an electronic time-delay device for undervoltage releases designed for ABB SACE Tmax XT5 and XT6 circuit breakers. Operating across a 48–60 V AC/DC rated voltage range, the UVD accessory is designed to work with a compatible undervoltage release and introduce a controlled delay into its operation.

Undervoltage releases are used to open a circuit breaker when their control supply falls below the required operating level or is lost. Adding an electronic UVD time-delay device allows short-duration voltage disturbances to be tolerated before the undervoltage release operates, helping reduce unnecessary circuit-breaker opening caused by momentary supply dips.

This version of the UVD is specifically intended for the ABB SACE Tmax XT5 and XT6 platforms and accepts both AC and DC supplies from 48–60 V. It forms part of ABB's electrical and auxiliary accessory range for Tmax XT circuit breakers and is suitable for industrial, commercial and infrastructure switchgear requiring delayed undervoltage-release operation.

Key Advantages

• Genuine ABB SACE Tmax XT electrical accessory.
• Electronic time-delay device for a compatible undervoltage release (UVR).
• Designed specifically for ABB SACE Tmax XT5 and XT6 circuit breakers.
• 48–60 V AC rated voltage range.
• 48–60 V DC rated voltage range.
• Helps prevent immediate breaker operation during brief undervoltage disturbances.
• Supports more controlled undervoltage-release operation in low-voltage switchgear.
• IEC and UL certified.

Key Features

• ABB UVD electronic time-delay device.
• Designed for undervoltage-release applications.
• Compatible with SACE Tmax XT5 and XT6.
• 48–60 V AC/DC rated voltage.
• Electronic time-delay functionality.
• Part of the ABB Tmax XT electrical and auxiliary accessory range.
• Suitable for low-voltage circuit-breaker installations.
• Designed for use with a compatible ABB undervoltage release.
• IEC and UL certification.
• Reference standard IEC 60947-2.

Controlled Undervoltage Protection for Circuit Breakers

An undervoltage release is used to initiate circuit-breaker opening when its control voltage falls below the required operating level or disappears. This functionality can be important where equipment must automatically disconnect following loss of the control supply, but immediate operation in response to every momentary voltage disturbance may be undesirable.

The ABB UVD electronic time-delay device is designed to add a time-delay function to a compatible undervoltage release. This allows the arrangement to tolerate brief voltage disturbances before the release operates, supporting more controlled circuit-breaker behaviour in industrial power distribution, automation, commercial buildings and infrastructure installations.

Typical Applications

• ABB SACE Tmax XT5 and XT6 circuit-breaker installations.
• Undervoltage-release control circuits.
• Industrial low-voltage switchboards.
• Commercial power distribution systems.
• Industrial automation and process installations.
• Infrastructure electrical distribution systems.
• Applications exposed to short-duration control-voltage disturbances.
• Switchgear requiring delayed undervoltage-release operation.