ABB 1SDA051360R1 UVD T1..T6 - XT1..XT4 110..125Va.c./d.c. Undervoltage Release Accessory (Electronic Time Delay)

The ABB 1SDA051360R1 UVD T1..T6 - XT1..XT4 110..125Va.c./d.c. is an electronic time delay undervoltage release accessory designed for the SACE Tmax T1–T6 and Tmax XT1–XT4 series moulded case circuit breakers. Rated for 110–125 V a.c./d.c. control voltage, this accessory automatically trips the connected circuit breaker when supply voltage drops below the set threshold, protecting motors, drives, and critical loads from damage caused by sustained undervoltage conditions. Compact and certified to IEC 60947-2, it integrates directly into the breaker frame without additional wiring complexity.

Technical Specifications

Certifications & Standards

• CE: Compliant with EU low-voltage and electromagnetic compatibility directives
• IEC 60947-2: Meets international standard for low-voltage circuit breakers and associated accessories
• UL 489: Listed to UL standard for moulded case circuit breakers and circuit-breaker enclosures
• RoHS: Restriction of Hazardous Substances — compliant with EU Directive 2011/65/EU
• REACH: Compliant with EU REACH regulation (EC) No 1907/2006 on chemical substances
• WEEE: Compliant with Waste Electrical and Electronic Equipment Directive 2012/19/EU

Applications & Use Cases

• Motor and drive protection in industrial control panels where sustained undervoltage can cause overheating or stall conditions
• Generator and UPS switchgear applications requiring automatic tripping on voltage loss or excessive voltage dip
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• Process automation systems requiring fail-safe disconnection of critical loads during power quality events
• Building services and infrastructure switchboards with T1–T6 or XT1–XT4 Tmax breakers already installed