ABB REL551 1MRK002480-AE Integrated protection relay module

ABB REL551 1MRK002480-AE Integrated protection relay module

Specific Parameters

• Electrical ParametersSupply Voltage: Wide-range input of 48/60/110/125V DC or 100/110/220V AC (50/60Hz)Rated Power Consumption: ≤20W under normal operation, ≤30W under maximum loadAnalog Inputs: 6 current inputs (configurable rated current 1A/5A), 3 voltage inputs (rated voltage 100V/220V)Digital I/O: 8 isolated digital inputs (24V DC), 4 relay outputs (rated 250V AC/DC, 5A continuous current)Communication Interfaces: 2 Ethernet (100Mbps), 1 RS-485 serial port, 1 USB local configuration interfaceSupported Protocols: IEC 61850 Ed.1, Modbus RTU/TCP, DNP 3.0Isolation Level: Isolation voltage ≥2500V AC (1min) between input/output and system circuits, insulation resistance ≥100MΩ (500V DC)Protection Functions: Three-stage overcurrent protection (definite/inverse time), earth fault protection, differential protection, overvoltage/undervoltage protection, short-circuit protection, ground leakage current protection
• Environmental ParametersOperating Temperature: -40°C to 70°C (non-condensing)Storage Temperature: -40°C to 85°CRelative Humidity: 5% to 95% (non-condensing, continuous operation for 168 hours at 90% humidity and 40°C without failure)EMC Immunity: Complies with EN 61000-4-2/3/4 standards, ESD protection ±15kV (air discharge), ±8kV (contact discharge)Vibration Resistance: 10-500Hz, 1.5g acceleration (IEC 60068-2-6 standard, 2 hours for X/Y/Z axes each)Certification Standards: CE certification (EMC and safety), UL 61850 certification, IEC 61850 compatibility certification
• Mechanical ParametersDimensions: 144mm (W) × 144mm (H) × 175mm (D)Weight: Approximately 2.5kgMounting Method: 19-inch standard rack mounting (4U height)Housing Material: Flame-retardant reinforced plastic (UL 94 V-0 grade)Operation Interface: 3.5-inch color touch screen, supporting graphical configuration and fault data queryIndicators: 8 tri-color LED indicators, indicating operation, fault, protection action and communication status respectively

Product Performance

The module’s protection operation time is ≤50ms, and logic processing cycle ≤10ms, enabling rapid identification and isolation of fault areas to prevent accident expansion. Analog measurement accuracy is ≤±0.5% full scale, frequency measurement range 45-65Hz with accuracy ±0.01Hz. It supports 1-13th harmonic analysis, with total harmonic distortion (THD) measurement accuracy ±0.3%.

Event recording resolution is 1ms, capable of storing 500 sequence of events records (SER) and 50 disturbance recording data, with maximum recording duration up to 3.4s. Fault information can be uploaded to the background system in real time via Ethernet. It supports 4 automatic reclosing operations with configurable intervals of 0.1-300s, and features “close-before-open” logic interlocking.

Built-in intelligent diagnosis module can detect 18 types of faults including power abnormality, communication interruption, I/O channel failure and ADC abnormality, with diagnostic coverage ≥99%. The device’s Mean Time Between Failures (MTBF) is ≥1,000,000 hours (25℃ environment), supporting online configuration download and parameter modification, with configuration update time ≤20 seconds.