Siemens 3UG5512-2AR20 Phase Monitoring Relay, 3x160-690VAC, 1 Changeover Contact, Spring-Type Terminals

The Siemens 3UG5512-2AR20 is a high-quality phase monitoring relay from the SIRIUS 3UG5 series, designed for reliable monitoring of three-phase networks. It detects phase sequence, phase failure, undervoltage, and overvoltage conditions, ensuring the protection of connected equipment. With a measuring voltage range of 3 x 160-690 V AC and spring-type terminals for easy wiring, this relay is ideal for industrial applications.

Advantages

• Comprehensive monitoring: phase sequence, phase failure, undervoltage, and overvoltage.
• Adjustable thresholds for undervoltage, overvoltage, and asymmetry.
• Adjustable response and reset delays (0.1-20 s) for flexible configuration.
• Spring-type terminals for fast and secure connections.
• DIN rail mounting for easy installation in control cabinets.

Suitable for

• Industrial automation and control systems
• Motor protection and monitoring
• Power distribution and network monitoring
• HVAC systems and pump controls

Key specifications

• Product type: Phase Monitoring Relay
• Series: SIRIUS 3UG5
• Monitoring functions: Phase sequence, phase failure, undervoltage, overvoltage
• Measuring voltage range: 3 x 160-690 V AC (line-to-line)
• Frequency: 50/60 Hz
• Contact configuration: 1 changeover contact (SPDT), 1 NO + 1 NC
• Rated operational current: 3 A at 230 V AC (AC-15), 1 A at 24 V DC (DC-13)
• Connection type: Spring-type terminals
• Mounting: DIN rail (35 mm)
• Operating temperature: -25 to +60 °C
• Protection class: IP20 (terminals), IP40 (front)

Recommendations

For optimal performance, ensure proper wiring and configuration of thresholds and delays according to your application requirements. This relay is a reliable choice for protecting three-phase motors and equipment from voltage anomalies.