Overview
Configured for non-directional phase overcurrent and earth-fault protection in electrical distribution networks, the ABB REF615C_C (REF615 feeder protection and control IED) processes current inputs, evaluates protection conditions, and issues circuit-breaker trip commands according to configured protection logic. It supports substation automation through IEC 61850 communication, subject to the installed hardware and firmware configuration.
Suffix Breakdown & Model Matrix
| Parameter | Specification |
|---|---|
| Base Model | REF615 |
| Configuration | Standard Configuration C |
| Variant Reference | REF615C_C, as supplied |
| Configuration Function | Non-directional overcurrent and earth-fault protection |
| Ordering Code Details | Full hardware ordering code not provided |
The supplied variant reference identifies Configuration C but does not establish every hardware option. Confirm the complete ordering code, CT/VT input ratings, communication interfaces, and auxiliary power variant against the device nameplate and ABB documentation.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | REF615C_C |
| Brand | ABB |
| Product Family | Relion |
| Product Series | 615 Series |
| Product Type | Feeder Protection and Control IED |
| Protection Functions | Non-directional phase overcurrent and earth-fault protection |
| Additional Protection | Thermal overload and circuit-breaker failure protection, subject to configuration |
| Control Functions | Circuit-breaker control and interlocking, subject to configuration |
| Current Measurements | Phase currents and residual current |
| Electrical Measurements | Power, energy, and frequency, subject to hardware and configuration |
| Communication | IEC 61850; other protocols depend on the installed configuration |
| GOOSE Messaging | Supported through compatible IEC 61850 configurations |
| Time Synchronization | IEEE 1588 PTP support depends on the hardware and firmware variant |
| Communication Redundancy | PRP or HSR availability must be verified for the installed variant |
| Local Interface | Display and control interface depend on the selected hardware |
| Auxiliary Power | Variant-dependent AC/DC supply; verify the nameplate ratings |
| Operating Temp | Verify the applicable ABB technical manual |
| Power Consumption | Verify the selected auxiliary power and hardware configuration |
Protection Logic and Substation Communication
The REF615 evaluates phase-current and earth-fault measurements against configured pickup thresholds and operating delays. When a protection element operates, the configured logic determines whether to initiate a trip command or another programmed action.
Configuration C targets applications that use non-directional protection. Engineers must verify the earthing arrangement, CT connections, residual-current measurement method, and protection coordination settings before commissioning.
For substation communication, IEC 61850 can support the exchange of status, measurements, and protection-related messages. GOOSE communication can carry time-critical interlocking or trip signals when the relevant data sets, control blocks, network settings, and receiving logic are configured accordingly.
ABB Relion 615 devices use configurable hardware and firmware variants. Therefore, engineers must confirm the supported communication protocols, time synchronization methods, and network redundancy features for the exact unit rather than assuming that every REF615 includes identical interfaces.
Frequently Asked Questions
Q: Can the REF615C_C be used in a directional protection scheme?
A: The supplied description identifies Configuration C as a non-directional protection configuration. Confirm the supported application configurations and required directional elements in the ABB application manual before using it in a directional scheme.
Q: Which auxiliary supply voltage does the REF615 support?
A: The allowable supply range depends on the installed power-supply variant. Check the device nameplate and the corresponding ABB hardware manual before connecting AC or DC power.
Q: Does every REF615 support PRP, HSR, and IEEE 1588 PTP?
A: These capabilities depend on the installed communication hardware, firmware, and product configuration. Verify the applicable ABB technical documentation before designing the station network.
Field Installation Guidelines
- Confirm the complete ordering code, hardware revision, and Configuration C identification before installation.
- Verify CT and VT ratings, wiring polarity, phase sequence, and terminal assignments against the approved schematic.
- Check the auxiliary supply rating before energizing the relay.
- Configure phase overcurrent, earth-fault, thermal, and breaker-failure functions according to the approved protection coordination study.
- Verify trip-circuit wiring, breaker control logic, and interlocking before connecting the relay to an energized protection system.
- For IEC 61850 installations, verify network addressing, data sets, GOOSE subscriptions, and signal mapping at both transmitting and receiving devices.
- Use the manufacturer’s grounding and shield termination instructions for communication and measurement wiring.
- Separate low-level measurement and communication cables from high-current switching conductors where practical.
- Confirm enclosure dimensions, mounting requirements, environmental limits, and terminal torque from the applicable installation manual.
- Perform secondary-injection tests, functional trip tests, and communication checks under approved commissioning procedures.
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