Description
The ABB NBFNAANNNAA1BNN1XF is a dedicated feeder management and protection relay within the Relion 620 series family. It provides comprehensive protection, control, measurement, and supervision functionalities for utility substations and industrial power distribution networks.
Commercial Availability & Procurement
- Condition: New Original (Factory Sealed / New Surplus)
- Warranty: 12-Month Comprehensive Industrial Warranty
- Lead Time: Ships within 1–2 business days from stock availability
- Pricing Note: Listed price is indicative and subject to market conditions. Contact our sales team for a firm, up-to-date quote.
Technical Specifications
| Parameter | Value |
| Product Series | Relion 620 Series |
| Application Type | Feeder Protection and Control (REF620) |
| Standard / Region | IEC Compliance Configuration |
| Communication Module | None (NN – Standard Hardwired Configuration) |
| Protocol Options | IEC 61850 Baseline |
| HMI Type | Large Color LCD Display Unit |
| Mounting Mechanism | Flush mounting or optional withdrawable plug-in chassis |
| Operating Temperature | −24 to +70°C (−40 to +70°C storage limits) |
Order Code Breakdown
The model designation NBFNAANNNAA1BNN1XF decomposes into specific factory-built configuration metrics:
- N: Relion Product Family Line
- B: 620 Product Series Variant
- F: Feeder Protection Application Module
- N: IEC Standard Configuration Platform
- AAN: Base Analog/Binary Input/Output Board Selections
- NN: Communication Hardware Module Omitted (Relies on local terminal I/O)
- AA: Protocol Activation Layer (IEC 61850 Standard Integration)
- 1: Standard Power Supply Range Matrix
- B: Integrated Large Color Graphic HMI Console Assembly
- NN: Without Arc Protection Sensor Inputs
- 1: Version 2.0 Product Line Evolution Identifier
- XF: Regional Language Option / Specific Firmware Package Suffix
Field Experience & Engineering Insights
Application and Protection Architecture
In medium-voltage substation installations, the REF620 executes core multi-function protection schemes. It handles non-directional and directional overcurrent, earth-fault protection, thermal overload tracking, and breaker failure supervision.
- Hardware Extraction: The withdrawable plug-in unit design allows maintenance teams to extract the active relay chassis without disrupting the underlying terminal block wiring sequences.
- CT/PT Safety Note: An automatic short-circuiting mechanism engages on the current transformer (CT) input connectors when the plug-in unit is withdrawn. Warning: Always visually verify that the internal shorting bars have fully engaged before pulling the chassis under live load conditions to prevent high-voltage CT open-circuit arcs.
Communication & Configuration Hardening
Because the NN code signifies that no auxiliary Ethernet or serial communication card is populated in the rear slots, this unit functions primarily as a standalone standalone protector or interfaces with local point-to-point hardwired I/O interlocks.
- Local Management: Station engineers configure settings, view logic diagrams, and download disturbance files via the front RJ45 interface using the PCM600 Protection and Control IED Manager tool software suite.
- Memory Architecture: The configuration parameter set, custom logic mapping, and fault capture data are written directly to non-volatile memory segments. The system preserves all protection settings independently through prolonged station auxiliary power outages without relying on a battery backup cell.
System Integration & Compatibility Checklist
- Configuration Software: Parameterized exclusively using PCM600 (Version 2.5 or later) with the specific REF620 Connectivity Package installed.
- Enclosure Rating: IP54 on the front panel face assembly when flush mounted into switchgear doors; IP20 protection on the rear connection terminals.
- Standards Compliance: Fully compliant with IEC 60255 protection standards, CE directives, and certified for maritime use by classification frameworks.
Frequently Asked Questions
Can a rear communication board be field-retrofitted into this “NN” code unit?
Yes. The internal motherboard has expansion slots designed to receive communication modules (e.g., Modbus RTU, DNP3, or dual-port Ethernet fiber cards). However, adding a card requires opening the chassis enclosure, inserting the hardware card option, updating the order code parameters within the PCM600 configuration utility, and updating the system firmware licenses to activate the new network ports.
What should I check if the green “Ready” LED flashes rapidly but the HMI screen remains blank?
A rapidly flashing “Ready” LED indicates an internal self-supervision (IRF) system fault or a failure during the boot loop initialization. Check the diagnostic error code log by connecting a laptop running PCM600 to the front RJ45 port. If the flash card layer is corrupted or an internal auxiliary power supply component degrades, the relay module must be bench-tested or serviced.
Is this specific version backward compatible with PCM600 configurations from Version 1.0 REF620 relays?
Direct file loading is not supported. The “1” near the end of the code string represents a Product Version 2.0 architecture layout. To migrate an older project file, you must open the legacy configuration in PCM600, execute the IED Version Migration tool to adapt the blocks to Version 2.0 parameters, verify mapping changes, and then download the migrated profile into the new hardware.
