ABB RED521 1MRK002003-BA Protection relay module

ABB RED521 1MRK002003-BA Protection relay module

Specific Parameters

• Electrical ParametersSupply Voltage: 48/60/110/125V DC or 100/110/120/220/240V AC (50/60Hz)Analog Inputs: Basic configuration 4 current channels (4I), intermediate configuration 5 current + 1 voltage channels (5I+1U), supporting rated current inputs of 0.2A/1A/5ADigital Outputs: 4 high-power relays (PO) with continuous current capacity of 5A and 15A for 3 seconds; 2 signal outputs (SO) with continuous current capacity of 5ACommunication Interfaces: 1 fiber-optic serial port supporting LON/IEC/SPA protocols; 1 optional Ethernet interfaceProtection Functions: Three-stage overcurrent protection (definite/inverse time), earth fault protection, phase loss protection, inrush current detection, overvoltage/undervoltage protectionPower Quality Monitoring: Supports 1-13th harmonic analysis, THD measurement range 0-60% with accuracy ±0.3%
• Environmental ParametersOperating Temperature: -25°C to 70°C (non-condensing)Storage Temperature: -40°C to 85°CRelative Humidity: 5% to 95% (non-condensing)EMC Immunity: Complies with EN 61000-4-2/3/4/5/6 standards, ESD protection ±15kV (air discharge)Vibration Resistance: 10-500Hz, 1.5g acceleration (IEC 60068-2-6 standard)
• 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)

Product Performance

The module’s logic processing cycle is ≤10ms, with protection operation time ≤50ms for rapid fault response and tripping. Analog measurement accuracy reaches ±0.5% full scale, frequency measurement range 45-65Hz with accuracy ±0.01Hz. It supports 5 automatic reclosing operations with configurable intervals (0.1-300s). Built-in event logging stores 1000 event records and 100 disturbance records with a maximum recording duration of 3.4s. Self-diagnostic functions detect 20 types of faults (e.g., power abnormalities, communication interruptions, I/O channel failures) with diagnostic coverage ≥99%.