ABB – 1SDA066392R1 – UVR XT1..XT4 Undervoltage Release

The ABB 1SDA066392R1 is an undervoltage release accessory for Tmax XT series molded-case circuit breakers, specifically compatible with XT1 through XT4 frames. It trips the breaker when voltage drops below a defined threshold and prevents reclosure until proper voltage is restored, enhancing electrical system safety.

Key Features:

• Model: 1SDA066392R1

• Function: Undervoltage Release (UVR)

• Rated Operating Voltage: 220–240 V AC / 220–250 V DC

• Voltage Drop-Out Threshold: 35–70% of Un

• Voltage Pick-Up Threshold: ≥85% of Un

• Compatible With: ABB Tmax XT1, XT2, XT3, XT4 circuit breakers

• Standards Compliance: IEC 60947‑2, UL 489

• Mounting: Internal to circuit breaker

• Weight: Approx. 0.107 kg

• Dimensions: 110 × 60 × 140 mm