Description
3. Key Technical Specifications
| Parameter | Value |
|---|---|
| Application | Medium voltage feeder protection |
| Overcurrent Protection | Non-directional, multiple stages |
| Earth-Fault Protection | Non-directional (derived or measured) |
| Communication | IEC 61850, GOOSE support |
| Power Supply | 24-250 V DC / 100-240 V AC |
| Operating Temperature | -25°C to +55°C |
| I/O | Configurable binary inputs/outputs |
| Measurement | Currents, voltages, frequency |
| Housing | Withdrawable compact unit |
| Standards | IEC 61850 compliant |
4. Product Introduction
The ABB REF615C-D is a standard configuration feeder protection and control IED for overhead lines and cable feeders in distribution networks. It delivers non-directional overcurrent and earth-fault protection along with control and measurement functions.
Configuration C/D variants suit many outgoing feeder applications using phase current transformers. They integrate easily into substation automation systems with IEC 61850. Always cross-check the complete order code and application requirements with your system drawings.
- REF615C-D
- REF615C-D
5. Troubleshooting Quick Reference
| Symptom | Possible Cause | Relevance to this Part | Quick Check Method | Recommendation |
|---|---|---|---|---|
| Relay not powering up | Auxiliary supply problem | ❌ Low | Measure voltage at input terminals | Verify supply range and connections |
| No overcurrent operation | CT wiring or settings | ✅ High | Monitor measured current values | Confirm CT ratio and polarity |
| Earth-fault not detecting | Residual current calculation error | ✅ Medium | Check calculated Io in HMI | Verify grounding and wiring |
| Communication alarms | Ethernet or protocol setup | ✅ Medium | Check link status LEDs | Validate IP and GOOSE mappings |
| Unwanted trips | Incorrect protection settings | ✅ High | Review event log and fault records | Compare against coordination study |
Pull the disturbance recorder file for detailed analysis if needed.
6. Frequently Asked Questions (FAQ)
Is this relay hot-swappable? The plug-in unit design supports withdrawal with the circuit de-energized. Do not remove or insert while energized.
What condition are these relays? New Original / New Surplus. Units receive inbound verification, power-on testing, and basic function checks prior to shipment.
Does REF615C-D match my existing feeder protection setup? Compare the full type designation and configuration letter. I/O count and protection functions must align with the application.
What steps reduce swap risks? Export and save the old relay settings. Document all rear terminal wiring. Reload parameters using PCM600 and validate in test mode.
Warranty details? 1-year coverage for manufacturing defects under proper use. Excludes damage from installation errors or electrical stresses.
Why source surplus REF615 units? Quicker turnaround than new production and competitive pricing. These remain current technology with genuine ABB quality.
Key things to double-check on site? CT polarity and secondary circuit integrity. Proper earthing of the case. Test all enabled protection functions and output contacts before returning the feeder to service. Mismatched configurations have caused avoidable commissioning issues.
Start Chat
