ABB REX521GHHPSH07G Motor Protection Relay

Technical Specifications

• Rated Voltage: 100-120V (U, UO)
• Rated Current: 1/5A (IO, IOB)
• Frequency: 50/60Hz
• Operating Temperature: -25°C to +70°C
• Dimensions: 108 mm x 80 mm x 55 mm
• Weight: 0.45 kg
• Display: LCD for status monitoring and configuration
• Communication: Supports various protocols for integration with SCADA systems

Key Features

• High Precision: Utilizes high-precision measuring elements and advanced digital signal processing technology to ensure accurate and reliable measurement data.
• Multifunctionality: Provides a wide range of protection functions, including overload, underload, phase loss, single-phase grounding, overvoltage, and undervoltage protection.
• Reliability: Designed with high-reliability components and manufacturing processes to ensure stable and dependable operation in harsh industrial environments.
• User-Friendly Interface: Features an intuitive human-machine interface (HMI) with an LCD display for easy parameter setting, monitoring, and diagnostics.
• Modular Design: Adopts a modular design for easy expansion and maintenance, allowing users to customize the device according to specific application requirements.
• Communication Capabilities: Compatible with various communication protocols, enabling seamless integration with upper-level systems for remote monitoring and control.

Function Characteristics

• Overload Protection: Detects and responds to excessive current draw by the motor, preventing overheating and damage.
• Underload Protection: Monitors for conditions where the motor current falls below a set threshold, indicating potential issues such as belt breakage or pump cavitation.
• Phase Loss Protection: Identifies the loss of one or more phases in a three-phase system, protecting the motor from damage due to unbalanced operation.
• Single-Phase Grounding Protection: Detects ground faults in single-phase systems, preventing electrical shocks and equipment damage.
• Overvoltage and Undervoltage Protection: Monitors the supply voltage to the motor, protecting against voltage fluctuations that could affect motor performance or lifespan.
• Thermal Overload Protection: Uses a thermal model to simulate the heating of the motor windings, providing accurate protection against overheating.

Application Scenarios

• Industrial Automation: Used in factories and manufacturing plants to protect motors driving conveyors, pumps, compressors, and other machinery.
• Building Services: Ensures the reliable operation of motors in HVAC systems, water supply systems, and elevator controls.
• Agriculture: Protects motors used in irrigation systems, grain processing equipment, and other agricultural machinery.
• Transportation: Safeguards motors in railway signaling systems, airport baggage handling systems, and other transportation applications.
• Water Treatment: Monitors and protects motors in water treatment plants, ensuring continuous operation of pumps and other critical equipment.