ABB SPAU140C Numerical Synchro-Check Relay

Description

Technical Specifications

Core Measurement Parameters

• Nominal Voltage: 80–265 V AC (50/60 Hz); 18–80 V DC auxiliary supply
• Frequency Range: 45–65 Hz (supports global power system standards)
• Voltage Accuracy: ±0.5% of nominal voltage (Un)eero
• Phase Angle Accuracy: ±0.5° (critical for precise synchronization)
• Frequency Difference (Slip) Accuracy: ±0.1 Hz
• Operating Time: ≤20 ms (fast response for critical switching operations)
• Measurement Channels: Dual voltage inputs (U1, U2) for two-point monitoring

Control & Timing Settings

• Synchro-Check Thresholds:
  • Voltage Difference (ΔU): 0.02–0.4 × Un (resolution 0.01 × Un)eero
  • Phase Angle Difference (Δφ): 0–360° (configurable)
  • Frequency Difference (Δf): 0–5 Hz (configurable)
• Voltage-Check Thresholds:
  • Upper Voltage Limit (Umax): 0.5–1.0 × Uneero
  • Lower Voltage Limit (Umin): 0.0–0.9 × Uneero
• Time Delays:
  • Dead Time (tvc): 0.1–20 s (accuracy 0.01 s)
  • Closing Pulse Duration (tPULSE): 0.2–20 s (command mode)
  • Check Window (tCHECK): 0.05–300 s (command mode)

Communication Interfaces

• Serial Port: RS-485 (Modbus RTU, DNP3 protocols)
• SPA Bus: Electrical/optical serial bus (4800/9600 baud) for ABB system integration
• Data Display: Numerical LED/LCD for real-time measured values and settingseero

Mechanical & Environmental

• Form Factor: Standard industrial relay casing (compatible with switchgear panels)
• Weight: 3.15 kg (net)ABB
• Operating Temperature: -20 °C to +60 °C
• Storage Temperature: -40 °C to +85 °C
• Humidity: 5%–95% RH (non-condensing)
• Vibration/Shock: Complies with IEC 60068-2-6 (vibration) and IEC 60068-2-27 (shock)
• EMC Compliance: IEC 61000-4 series (industrial electromagnetic compatibility)
• Certifications: CE marked, compliant with IEC 60255 (relay standards)

Core Functions & Features

1. Dual-Stage Synchro & Voltage Check

• Dual Independent Stages: Two identical operation stages for monitoring two circuit breakersABB
• Synchro-Check Function: Validates voltage magnitude, phase angle, and frequency match before connecting live networksABB
• Voltage-Check Function: Verifies energization status for safe connection of dead sections to live gridsABB
• Four Energizing Directions: Configurable for each stage (U2→U3, U2←U3, both dead, or bidirectional)

2. Flexible Operation Modes

• Continuous Mode: Provides permanent closing permission to external control modules (e.g., PLCs)
• Command Mode: Directly controls circuit breaker closing with configurable pulse timing
• Failed Closing Alarm: Triggers alert if circuit breaker fails to close within the set window

3. High-Accuracy Measurement & Logic

• Microprocessor Control: Delivers precise, repeatable measurement and decision-making
• Configurable Parameters: All thresholds and delays adjustable via front panel or communication bus
• Real-Time Data Display: Shows measured voltages, phase angle, frequency difference, and operational statuseero
• Data Logging: Records event data for post-operation analysis and troubleshootingeero

4. Robust Self-Supervision & Reliability

• Continuous Self-Diagnosis: Monitors hardware and software integrity in real timeABB
• Fault Detection: Identifies measurement errors, communication faults, and internal anomalies
• Galvanic Isolation: Full isolation between measurement circuits and control logic
• Long-Term Stability: Designed for extended operation in industrial power environments

5. Seamless System Integration

• Multi-Protocol Support: RS-485 with Modbus RTU/DNP3 for SCADA connectivity
• SPA Bus Compatibility: Integrates with ABB’s legacy substation automation systems
• Standardized Wiring: Compatible with typical medium-voltage switchgear terminal layouts
• Duplex Switchgear Support: Optimized for applications requiring dual breaker controleero

Application Scenarios

• Power Grid Interconnection: Safe synchronization of two separate transmission or distribution networks
• Ring Main Closure: Controlled closing of ring mains to restore power supply after faults
• Busbar Paralleling: Interconnection of main and auxiliary busbars in substations
• Generator Grid Connection: Precise synchronization of generators with the main power grid
• Industrial Power Systems: Synchronization of backup generators with plant distribution networks
• Renewable Energy Integration: Safe connection of wind/solar farms to the utility grid
• Substation Automation: Integration into legacy ABB substation control and protection systems
• Power Restoration: Fast, safe reclosure of circuit breakers during system recovery operations

Unique Advantages

• Dual-Stage Design: Monitors two breakers in one unit, reducing hardware and installation costs
• High Measurement Accuracy: Ensures stable, damage-free synchronization of power systems
• Dual Operation Modes: Adapts to both automated and manual control architectures
• Legacy System Compatibility: Ideal for maintaining and upgrading existing ABB substation infrastructure
• Robust Self-Supervision: Minimizes downtime and enhances overall system reliability
• Configurable Flexibility: Adjustable parameters to meet diverse power system requirements