ABB REF543KB127AAAA

• Accuracy:
  • Measurement accuracy: ±0.2% for voltage/current; ±0.5% for power/energy .
  • Protection accuracy: ±5% for overcurrent/earth fault settings .
• Physical Parameters:
  • Dimensions: 210 mm × 175 mm × 125 mm (W×H×D), DIN rail mountable .
  • Weight: 2.8 kg (6.17 lb) .
• Environmental Ratings:
  • Protection: IP54 (dust and water splash protection) for indoor use .
  • Temperature: Operating range of -25°C to +70°C (-13°F to +158°F) .
  • Vibration Resistance: Compliant with IEC 60068-2-6 (10–500 Hz, 2 g) for industrial environments .
• Power Supply:
  • 85–264 V AC/DC (auto-ranging) with <5 W power consumption .
  • Built-in 48-hour capacitor backup for critical operations during power outages .

Functional Features

1. Comprehensive Protection Suite:
   • Overcurrent Protection:
     • Instantaneous overcurrent (50), definite-time overcurrent (51), and earth fault (50N/51N) functions .
     • Support for extremely inverse, very inverse, and standard inverse characteristics .
   • Distance Protection:
     • Three-zone impedance protection with fault location accuracy ±2% of line length .
   • Motor Protection:
     • Thermal overload (49), locked rotor, and unbalance protection for asynchronous motors up to 10 MW .
   • Capacitor Bank Protection:
     • Inrush current limitation and harmonic filtering for reactive power compensation systems .
2. Advanced Control & Monitoring:
   • PLC Functions:
     • 25 binary inputs (24 V DC) and 18 binary outputs (230 V AC/30 V DC) for automation sequences .
     • Support for IEC 61131-3 programming (LD/FBD/ST) for custom logic .
   • Condition Monitoring:
     • Real-time analysis of power quality (THD, harmonics, voltage dips) .
     • Switchgear health monitoring via contact wear detection .
3. Communication Capabilities:
   • Protocols:
     • IEC 61850 (via SPA-ZC 400 adapter), PROFIBUS DP V1 (via SPA-ZC 302), DNP 3.0, Modbus RTU/ASCII .
     • LON bus and SPA bus for substation-level integration .
   • Data Exchange:
     • 100 Mbps Ethernet port for high-speed SCADA/EMS connectivity .
     • Optical RS-232 port for local configuration and firmware updates .
4. Human-Machine Interface (HMI):
   • 4.3-inch color TFT display with configurable mimic diagram and touch-sensitive navigation .
   • Local control panel with 8 function keys for quick access to settings and diagnostics .

Application Scenarios

1. Power Distribution:
   • Feeder protection and control in utility substations (11–35 kV) .
   • Fault location and sectionalization for smart grid applications .
2. Industrial Processes:
   • Motor control centers (MCCs) in manufacturing plants (e.g., automotive, chemical) .
   • Load shedding and power quality management in mining and steel mills .
3. Renewable Energy Integration:
   • Protection for solar PV inverters and wind turbine grid connections .
   • Voltage/reactive power control for microgrids .
4. Transportation Infrastructure:
   • Railway traction power supply systems (25 kV AC) .
   • Tunnel ventilation and lighting control in metro networks .

Functional Architecture

• Hardware:
  • Dual-core processor (300 MHz) for real-time data processing .
  • Redundant communication buses (Ethernet/RS-485) for high availability .
• Software:
  • ABB Control Builder for parameter configuration and disturbance analysis .
  • Built-in disturbance recorder (100 events with 10 cycles/cycle resolution) .

Safety & Compliance

• Certifications: CE, UL, and IEC 61000-6-2/6-4 for EMC immunity .
• Cybersecurity:
  • AES-128 encryption for data communication .
  • Role-based access control (RBAC) via user passwords .

Typical Configuration Example

• Power System: 20 kV MV substation with 12 feeders .
• Functions Enabled:
  • Overcurrent protection with 50/51 elements .
  • Auto-reclosing (5 shots) with voltage supervision .
  • Integration with IEC 61850-based substation automation system .