Description
Product Core Brief
- Model: REF610C11HCNN01 (complete set including matching draw-out baseplate)
- Brand: ABB
- Series: Relion® 610 Series REF610 Medium Voltage Feeder Protection IED
- Core Function: Draw-out multi-function feeder relay delivering full overcurrent/earth fault protection, breaker control, power measurement, fault recording and auto-reclosing for 3–35kV distribution feeders; supplied factory pre-mated with dedicated terminal baseplate for cabinet plug-in mountingABB Group.
- Product Type: Draw-out Feeder Protection Relay Full Assembly (Unit + Baseplate)
- Key Specs: 1A rated CT inputs | H-type 100–240V AC/DC universal auxiliary supply | Standard I/O without extension module
- Note: Officially end-of-production since 2017; limited factory residual sealed kits and fully bench-tested surplus assemblies stocked for legacy utility & industrial substation retrofitsABB Group.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Full Assembly Composition | REF610C11HCNN01 plug-in main unit + dedicated wired draw-out baseplate |
| CT Rated Input | 1A phase current, 1A earth fault current (C11 suffix defines 1A CT hardware) |
| Auxiliary Power (H variant) | 100–240 VAC / 110–250 VDC wide-range universal supply |
| Standard Built-in I/O Layout | 4 analog CT inputs; 2 digital binary inputs; 3 heavy-duty power trip outputs (PO); 2 signal auxiliary outputs (SO) |
| Core ANSI Protection Functions | 50/51 multi-stage overcurrent, 51N non-directional earth fault, 46 phase unbalance, 49 cable thermal overload, 79 multi-shot auto-reclose, 50BF breaker failure, trip circuit supervisioneero |
| Onboard Communication Interfaces | Front optical SPA bus; rear RS485 supporting Modbus RTU, DNP3.0; IEC 60870-5-103 via fiber media adapter |
| Fault & Event Storage | 100 timestamped operational event records; 5 latest fault waveform disturbance records (max 80s recording window) |
| Draw-out Mechanical Design | Hot removable plug-in unit; baseplate hardwired to cabinet CT/VT/control wiring for fast unit swap |
| Enclosure Rating | Front panel IP54 flush cabinet mount; baseplate rear terminal section IP20 |
| Operating Ambient Temp | -10 °C to +55 °C continuous rack operation; short-term -40 °C ~ +70 °C |
| Humidity Rating | <95% RH non-condensing |
| Mechanical Form Factor | 4U half-width 19-inch panel draw-out assembly |
| Dimensions (Full Assembly) | 177 mm W × 177 mm H × 149.3 mm D |
| Total Assembly Weight | ~3.5 kg (main unit + baseplate) |
| Compliance Certifications | KEMA type tested, DNV marine/offshore certified, IEC 60255, UL508, RoHS |
Product Introduction
This complete draw-out assembly pairs the REF610C11HCNN01 main protection unit with its matching factory baseplate, eliminating separate baseplate procurement and field wiring calibration during substation maintenance. The C11 suffix specifies 1A CT secondary input hardware, suited for distribution transformers and small feeder bay schemes with low secondary current signalseero.
All core feeder protection algorithms are embedded onboard, supporting solidly earthed and resistance-earthed distribution networks without extra auxiliary relays. The plug-and-play baseplate design cuts maintenance downtime: technicians only disconnect the main unit, leaving CT/VT and control wiring permanently terminated on the baseplate to avoid dangerous CT open-circuit risks during replacement.
Built-in multi-shot auto-reclosing logic handles overhead distribution line transient faults, while the disturbance recorder captures analog and digital fault waveforms for post-outage root cause analysis. Front optical SPA port enables laptop parameterization without opening live cabinet terminals.
QA & Testing SOP (Transparency Building)
- Incoming Inspection: Cross-reference full model suffix and baseplate matching serial numbers against OEM spare registry to reject mismatched counterfeit assemblies; inspect LCD HMI, baseplate screw terminals, CT shorting links and PCB conformal coating for scratches or moisture corrosion; log serial batches for full traceability.
- Live Assembly Testing: Mount full unit+baseplate to standard 4U test rack, supply stabilized 220V AC/DC auxiliary power, inject 1A CT simulated fault signals, run continuous 24-hour protection element cycling and RS485 Modbus communication stress testing with fault recorder validation.
- Electrical Testing: Use Fluke 115 multimeter and insulation tester to verify chassis ground resistance below 0.5Ω and isolation resistance above 10MΩ between auxiliary power, CT measurement and binary control circuits; validate baseplate CT shorting links functional.
- Firmware/Config Backup: Record exact embedded firmware revision via SPA PC tool, photograph baseplate DIP communication address jumpers, export complete protection setting groups and auto-reclose logic to encrypted offline storage.
- Final QC & Packaging: Clean front LCD surface with anti-static microfiber cloth, cap SPA optical port with dust plug, separate main unit and baseplate into individual ESD shielding bags, attach unified QC test tag with technician ID and full 24-hour runtime timestamp before foam-lined transit carton packaging.
Installation Pitfalls & Guide (Engineer to Engineer)
❗ Firmware Version Mismatch: Firmware builds newer than site REF610 setting software block full protection curve upload and disable disturbance recorder storage; cross-check OEM software compatibility matrix before downloading parameter sets.❗ CT Open-Circuit Safety Risk: Always engage baseplate built-in CT shorting links before pulling the main unit out; unshorted CT terminals generate lethal high secondary voltage during disassembly.❗ RS485 Bus Address Conflicts: Duplicate bay node addressing floods substation Modbus bus with broadcast traffic; capture high-resolution photos of baseplate communication DIP jumpers prior to unit removal.❗ Auxiliary Supply Underrating: The full assembly draws peak 18W during simultaneous trip output actuation; shared cabinet DC power supplies with multiple IEDs trigger voltage sag and incomplete relay boot sequences.❗ ESD Dangers: Unwristed technician contact with rear exposed PCB traces corrupts flash-based protection settings and real-time clock backup circuits; field service logs show ungrounded handling destroyed this assembly with over $3,100 in hardware and substation outage labor costs.
4-step full assembly replacement guide
- Pre-install: Lock out and tag out substation auxiliary supply, engage baseplate CT shorting links, fit certified anti-static wrist strap, photograph CT/VT wiring, binary DI/DO terminals and RS485 communication jumper positions.
- Removal: Unlatch draw-out unit locking handle, pull the main protection unit fully out of the fixed baseplate (baseplate remains wired to cabinet). Retain baseplate if undamaged; replace full assembly if baseplate terminals are corroded.
- Install: If reusing original baseplate: slide new main unit fully into baseplate rail and lock handle, replicate original DIP communication jumper settings. If replacing full kit: mount new baseplate to cabinet frame, reterminate all CT/VT and control wiring, replicate bus address jumpers, then insert main unit and lock.
- Power-on Test: Restore auxiliary supply power, disengage CT shorting links, upload matching firmware and protection setting groups, inject simulated short-circuit/earth fault signals to validate trip output operation, confirm fault recording and stable Modbus SCADA communication.
FAQ (Frequently Asked Questions)
Q: What does the C11 suffix in REF610C11HCNN01 stand for?A: C = hardware revision C platform; first digit 1 = phase CT rated 1A; second digit 1 = earth fault CT rated 1A, matching low-current secondary distribution CT schemeseero. H denotes 100–240V AC/DC universal auxiliary supply; CNN01 means no optional I/O extension module and standard factory communication configuration.Q: Can the main unit be hot-swapped while the baseplate and auxiliary bus remain energized?A: Mechanical draw-out design allows unit removal with auxiliary power live only after activating CT shorting links. Never pull the unit without shorting CT circuits—this creates lethal arc flash hazards and permanent CT damage. Full cabinet lockout is still recommended for full assembly (baseplate + unit) replacement.Q: What warranty coverage applies to stocked full kits with baseplate?A: Remaining factory-new OEM legacy kits carry a 12-month manufacturer warranty covering both main unit and baseplate terminal assembly. Bench-tested surplus full assemblies ship with a 6-month functional warranty; physical damage from CT open-circuit transients, miswiring or ESD voids all coverage terms.Q: Has ABB issued formal EOL documentation for REF610 series?A: End-of-production status active since 2017; OEM no longer manufactures new batches, only limited residual surplus full assemblies exist for legacy distribution substation fleets. Modern upgrade alternative is ABB REF615 Relion IED.Q: Will protection setting groups and auto-reclose logic persist after swapping the main unit onto the existing baseplate?A: All trip curves, fault thresholds and sequence logic reside in the main unit’s internal flash memory. Back up the full project database from the old unit before removal and re-download to the new unit post-install; firmware mismatches corrupt parameter upload sequences.Q: What communication expansion accessories are compatible with the rear RS485 port?A: Valid media converters support plastic fiber SPA bus, glass fiber IEC 60870-5-103, Profibus DP and Ethernet IEC 61850 gateways. Cross-reference the REF610 hardware manual for maximum bus cable distance and baud rate limits.Q: Can this IED be deployed for transformer differential or high-voltage transmission line primary protection?A: Native protection suite is limited to distribution feeder non-directional overcurrent and earth fault only; transformer differential and distance line protection require REF630 or REF615 advanced variants, not this REF610 model.
