ABB REF620E_F NBFNAANNNCC1BNN1XF Intelligent Feeder Protection & Control IED (Intelligent Electronic Device)

ABB REF620E_F is a high-end enhanced feeder protection relay belonging to ABB Relion® 620 product family, customized full ordering code: NBFNAANNNCC1BNN1XF. 

It is designed for comprehensive protection, control, measurement, fault recording and supervision of medium-voltage overhead lines, cable feeders, capacitor banks and busbar sections in utility 

and industrial power distribution networks.

This numerical IED integrates multi-stage overcurrent, directional earth fault, arc flash detection, auto-reclosing, breaker failure, thermal overload and grid interconnection protection algorithms.

 It supports radial, ring and meshed distribution networks, adaptable to insulated, resonant grounding and resistance grounding neutral systems. Equipped with dual Ethernet and RS485 

communication architecture fully compliant with IEC 61850 Edition 2 including GOOSE fast inter-tripping, it realizes seamless data interaction with substation SCADA, bay controllers 

and third-party automation systems. With withdrawable plug-in structure, comprehensive event logging and COMTRADE fault waveform recording function, it serves as core primary protection 

equipment for substation reconstruction, new substation construction, and maintenance spare replacement for power grid and industrial power distribution projects worldwide.

Technical Specifications

Full Part Number: REF620E_F NBFNAANNNCC1BNN1XF

Manufacturer: ABB, Origin: Sweden

Product Series: Relion® 620 Series Feeder Protection IED

Rated Secondary Current Input: 1A / 5A configurable

Rated Voltage Input: 100V / 110V / 220V AC configurable

Auxiliary Power Supply: 110–240V AC/DC wide-range universal input

I/O Configuration: 16 Digital Inputs, 8 Relay Digital Outputs

Communication Interfaces

Dual Independent 10/100Mbps Ethernet (IEC 61850 Ed2, GOOSE, MMS)

1× RS485 Port (Modbus RTU, IEC 60870-5-103, DNP3)

Main Protection Functions

Non-directional / Directional Overcurrent (50/51, 67) 4-stage

Non-directional / Directional Earth Fault (50N/51N, 67N)

Negative Sequence Overcurrent (46), Thermal Overload (49)

Breaker Failure Protection (50BF), Arc Flash Protection

Multi-shot Auto-reclosing, Under/Over Voltage, Frequency Protection

Measurement Accuracy: Current ±0.2%, Voltage ±0.5%, Power/Energy Class 0.5

Fault Recording: COMTRADE waveform recording, 128-event sequence of event log

Human Interface: Full graphic LCD display + multi-function operation pushbuttons

Mechanical Form: 1/3 6U withdrawable plug-in unit, panel mounting

Overall Dimension: 252mm × 180mm × 215mm

Net Weight: Approx. 3.5kg

Operating Temperature: -25℃ ~ +55℃

Storage Temperature: -40℃ ~ +85℃

Humidity: 5%–95% Non-Condensing

Front Panel Protection Class: IP54

Compliance Certifications: CE, IEC 60255, IEC 61850, IEC 62351 Cybersecurity

Key Features

Enhanced REF620E_F upgraded hardware platform, built-in arc flash protection logic, effectively suppress arc explosion hazards inside medium voltage switchgear cabinets.

Complete four-stage directional/non-directional overcurrent & earth fault protection, compatible with IEC and ANSI time-current characteristic curves for flexible setting.

Dual redundant Ethernet IEC 61850 communication, GOOSE inter-tripping speed below 10ms, improving substation interlock reliability and operation speed.

Withdrawable modular design, hot-pluggable replacement without whole bay power cut, greatly shortening substation maintenance outage time.

Rich programmable binary IOC logic, flexible control for circuit breaker, disconnector and earthing switch, realizing complete bay level interlock control.

Embedded disturbance recorder & event sequence logging, convenient post-fault analysis, fault location and power grid accident tracing.

Built-in cybersecurity compliance IEC 62351, user permission management and communication encryption to prevent unauthorized access and tampering.

Full graphical local HMI for parameter viewing, setting modification, fault checking and manual switching operation without upper computer intervention.

Pin-to-pin compatibility with standard REF620 series variants, direct replacement for old protection device renovation projects.