ABB REF615

The ABB REF615 is a medium-voltage protection relay from the REx5xx series, specifically designed for distribution systems with voltage levels of 10kV and below. It is classified as an IED (Intelligent Electronic Device).
1. Core Functions
- Protection Functions:
  ✓ Overcurrent protection (50/51, 50N/51N)
  ✓ Earth fault protection (67N, 50G/51G)
  ✓ Directional protection (67, 67N)
  ✓ Thermal overload protection (49)
  ✓ Voltage protection (27/59)
  ✓ Frequency protection (81)
- Control Functions:
  ✓ Circuit breaker control
  ✓ Auto-reclosing (79)
  ✓ Fault recording (4kHz sampling rate)
2. Technical Specifications
| Feature | Specification |
|---------|---------------|
| Rated Voltage | 100-240V AC/DC |
| Current Input | Configurable 1A/5A |
| Communication | 2×Ethernet(61850), 1×RS485 |
| Operating Temp | -25℃ ~ +70℃ |
| Protection Class | IP40 (Front panel IP52) |
3. Hardware Configuration
- Modular Design:
  • Base unit: Protection + Measurement
  • Optional modules:
    - I/O expansion (16DI/8DO)
    - Arc protection interface
    - Synchronism check (25)
4. Communication Protocols
- IEC 61850 Ed2.0
- Modbus RTU/TCP
- DNP3.0
- IEC 60870-5-103
5. Typical Applications
- Substation feeder protection
- Busbar section protection
- Motor protection
- Transformer backup protection
6. Key Features
- Innovative:
  • Adaptive protection algorithms
  • Dynamic setting group switching
  • Built-in power quality monitoring
- Reliable:
  • MTBF > 100,000 hours
  • Certified by KEMA, UL etc.
7. Configuration Tools
- PCM600 software:
  ✓ Parameter configuration
  ✓ Logic programming
  ✓ Waveform analysis
  ✓ Remote diagnostics
8. Order Code Explanation
Example: REF615 C NF1A 1MRS020001
- C: Chassis type
- NF1A: Function package (incl. overcurrent+earth fault+voltage protection)
- 1MRS...: Hardware version
9. Latest Upgrade (2023 Version)
- New features:
  • Enhanced cybersecurity (IEC 62351)
  • GOOSE subscription support
  • Added temperature monitoring interface
The device enables digital operation through ABB Ability™ and can be seamlessly integrated with EDCS systems. Typical wiring configurations include 3CT+3PT setups, suitable for ungrounded/resonant grounded neutral systems. Contact us if you need this product!