ABB AFO4LE 1KHL015545R0002 Protection Relay

Product Description

The ABB AF04LE 1KHL015545R0002 is a high-performance, microprocessor-based intelligent motor protection relay designed for modern industrial automation networks. Operating on a stable 24 VDC control power supply, this versatile device provides comprehensive monitoring, control, and fault protection for low-voltage motors with current demands ranging from 0.1 to 63 A. 

Technical Specifications

• Manufacturer: ABB

• Model Number Designation: AF04LE

• Global Order Part Number: 1KHL015545R0002

• Device Classification: Intelligent Motor Management / Digital Protection Relay

• Monitored Line Phase Voltage: Rated up to 230 V AC

• Active Monitoring Current Range: 0.1 A to 63 A (Adjustable configuration thresholds)

• Core Hardware Protection Spectrum: Real-time inverse-time thermal overload, instantaneous overcurrent, phase loss/failure, and phase unbalance tracking

• Control Power Supply Requirement: 24 V DC ($\pm10\%$ operational margin)

• I/O Signal Density: Multiple localized digital input channels for status feedback alongside high-precision analog I/O for telemetry mapping

• Network Communication Protocol Suite: Factory-ready interfaces supporting Modbus RTU, PROFIBUS DP, CANbus, and Ethernet/IP architectures

• Localized Operator HMI Display: Backlit alphanumeric LCD screen providing instantaneous monitoring parameters and fault trip codes

• Mechanical Installation Method: Standard 35 mm DIN rail mounting interface

• Environmental Enclosure Protection: IP20 rated (Designed for enclosed control panel installation)

• Climatic Operating Envelope: -20°C to +70°C (-4°F to +158°F); up to 95% relative humidity (non-condensing)

• Physical Dimension Footprint: 100 mm × 75 mm × 110 mm (H × W × D)

• Net Device Physical Weight: 0.5 kg (Approx. 1.10 lbs)

Industrial Application Scenarios

The ABB AF04LE 1KHL015545R0002 relay is widely implemented inside Motor Control Centers (MCCs) across infrastructure-heavy industries, including chemical processing plants, water treatment facilities, mining operations, and automated logistics centers. It serves as the primary protection layer for low-voltage induction motors driving critical process machinery such as centrifugal pumps, cooling fans, air compressors, screw conveyors, and vacuum systems. By linking the motor's running current directly to your upstream PLC or distributed control system (DCS), it prevents localized motor breakdowns from turning into costly, plant-wide operational stoppages.