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Key Technical Specifications
- Product Type: Feeder Protection and Control Relay
- Communication Standards: IEC 61850 (Ed. 1 & 2), GOOSE, IEC 61850-9-2 LE
- Redundancy Protocols: Parallel Redundancy Protocol (PRP), High-Availability Seamless Redundancy (HSR)
- Additional Protocols: Modbus, DNP3, IEC 60870-5-103, IEEE 1588 v2
- Protection Functions: Directional/Non-directional Overcurrent, Earth Fault, Thermal Overload
- Voltage & Frequency: Over/Under Voltage, Over/Under Frequency, Rate of Change of Frequency
- Fault Detection: Cable Fault Detection (CFD), High Impedance Fault Detection (HIZ)
- Arc Protection: Supports up to 3 arc fault detection channels (optional)
- Display: Large graphical LCD with single-line diagram
- Physical Design: Compact, withdrawable (plug-in) unit design
Product Introduction
The ABB REF615E_1G is a dedicated feeder protection and control relay engineered for public and industrial power distribution systems. As part of the Relion® 615 series, it handles protection, control, measurement, and monitoring for radial, ring, and mesh networks, including those with distributed generation.This relay stands out by natively supporting IEC 61850, HSR, and PRP communication standards without requiring extra modules. It comes with 12 pre-configured standard setups, which significantly cuts down engineering time. Field engineers appreciate its fast withdrawal design, allowing for quick replacement during maintenance without extensive rewiring.
Installation & Configuration Guide
Preparation (10 min)
- Verify the incoming model number matches your order.
- Ensure you have the necessary tools for terminal wiring and rack mounting.
- Check the environmental conditions (operating temp usually 0-55°C, verify with OEM datasheet).
Removal & Mounting (10 min)
- The unit features a withdrawable plug-in design. Align the relay with the rack slot.
- Slide the unit firmly into the slot until it seats correctly.
- Secure the front panel screws to lock the relay in place.
Wiring & Connections (15-20 min)
- Connect the Current Transformers (CTs) to the designated Ia, Ib, Ic inputs.
- Critical: Ensure CT polarity is correct (P1 to positive input, P2 to negative). Reversed polarity will cause directional protection malfunctions.
- Connect the auxiliary power supply (check voltage rating on the nameplate).
- Wire the binary inputs/outputs and communication ports (Ethernet/Serial) as per your single-line diagram.
Power-On & Test (10 min)
- Apply auxiliary power. The large LCD should light up, and the relay will run a power-on self-test.
- Verify communication handshakes via the configured protocol (e.g., IEC 61850 or Modbus).
- Check LED indicators for normal status (no active alarms).
Troubleshooting Quick Reference
| Issue | Probable Cause | Quick Fix / Check |
|---|---|---|
| Directional Protection Trip | CT Polarity Reversed | Check CT P1/P2 alignment with relay Ia+/Ia- inputs. |
| No Display / Dead Unit | Auxiliary Power Missing | Measure voltage at power terminals; ensure it matches rating. |
| Communication Failure | IP/Protocol Mismatch | Verify IP address and IEC 61850/Modbus settings in the HMI. |
| Earth Fault False Trip | Incorrect Setting Group | Review if the relay is set for the correct earthing system (e.g., isolated vs. resistive). |
| Arc Protection Alarm | Sensor Fault or Light Leak | Inspect arc sensor fibers for damage or unintended light exposure. |
Dimensions, Mounting & Wiring Notes
- Mounting Method: 19-inch rack mount or panel flush mounting (with cutout). The unit is designed as a withdrawable plug-in module.
- Physical Dimensions: Compact design, approximately 250mm (H) x 210mm (W) x 250mm (D) (verify exact depth with specific sub-variant datasheet).
- Weight: Net weight is approximately 2.3 kg to 4 kg depending on the exact internal configuration.
- Terminal Notes: Uses ring-lug terminals for all inputs and outputs. Ensure CT secondary circuits are never left open during operation to prevent high-voltage hazards.
FAQ
Q: What is the difference between REF615E_1G and other REF615 models?
A: The “E” typically denotes the IEC standard version, and the suffixes (like _1G) indicate specific hardware configurations, such as the number of I/Os and communication ports. Always check the full order code against the OEM datasheet.Q: I need to replace an old relay. Is this a direct fit?
A: If you are replacing an older REF615 from the same series, the mounting cutout is generally compatible due to the standardized 615 series design. However, you must verify the rear terminal wiring diagram, as pinouts can vary between hardware revisions.Q: Does this support distributed generation (DG) protection?
A: Yes. The relay is designed to handle bi-directional power flows and includes protection functions suitable for networks with distributed generation, such as frequency protection and directional overcurrent.Q: Is the stock brand new?
A: We supply New Original or New Surplus units. All items undergo a visual inspection and a basic power-on test to ensure the display works and the unit boots up correctly before shipping.Q: Can I use this for arc flash protection?
A: Yes, but it is an optional feature. The relay can be equipped with up to three arc detection channels. You need to confirm if the specific unit in stock has the arc protection hardware option installed.Q: What software do I need to configure this relay?
A: ABB uses the PCM600 (Protection and Control IED Manager) tool for configuring the 615 series relays. You will need the appropriate connectivity package for the REF615.
