Description

The ABB REF620E_F NBFNAAAANDA1BNN1X is a compact feeder protection relay designed for primary and secondary distribution networks in the 6-36 kV range. As part of ABB’s Relion® 600 series, this IEC 61850-compliant device integrates advanced protection, control, and monitoring functions for overhead lines, cables, and transformers. The REF620E_F features customizable logic (CFC) and comprehensive arc flash detection via integrated light sensors, significantly reducing fault clearance times to <5ms>

Engineered for harsh environments, the relay operates at -40°C to +70°C with 95% humidity tolerance and withstands 15g shock loads. The ABB REF620E_F NBFNAAAANDA1BNN1X variant specifically includes ANSI 50/51 phase overcurrent, 50N/51N earth fault, thermal overload (49), and voltage protection (27/59) functions. The human-machine interface combines a graphical LCD with multilingual support and tactile keys for local operation, while its lightweight aluminum housing (IP54) enables direct panel mounting in space-constrained switchgear.

Technical Specifications

Main Features and Advantages

Advanced Protection & Selectivity: The ABB REF620E_F implements adaptive curve shaping for overcurrent functions, coordinating seamlessly with upstream/downstream devices. Directional earth fault detection (67N) uses quadrature polarization for reliable operation in compensated networks. Its <35ms>

Cybersecurity & Reliability: Hardware-enforced security includes secure boot, role-based access (IEC 62351), and audit trails. Dual-redundant Ethernet ports support PRP/HSR for zero-recovery-time network failover. The relay’s non-volatile memory retains settings during 200ms power dips.

Engineering Efficiency: Drag-and-drop logic editor in PCM600 enables custom schemes without programming. Pre-configured application templates accelerate deployment. The REF620E_F NBFNAAAANDA1BNN1X supports online setting changes and disturbance recorder retrieval without affecting protection functions.

Application Field

The ABB REF620E_F NBFNAAAANDA1BNN1X protects critical infrastructure:

Industrial Plants: Secures motor control centers (MCCs) and distribution transformers in steel mills, with arc flash detection reducing incident energy

Renewable Energy: Manages collector circuits in solar farms and wind turbine step-up transformers

Mining: Protects trailing cables in dragline excavators (6-10kV) with ground fault monitoring

Data Centers: Ensures selective coordination between main-tie-main switchgear

Transportation: Controls traction power substations for rail networks

Smart Grids: Implements auto-reclosing (79) with synchrocheck (25) for self-healing networks

Related Products

REF615: Advanced version with differential protection and fault location

REC650: Bay controller for centralized substation automation

CMUFS: Arc flash sensor kit for REF620E_F

RBU615: Ruggedized backup power module

SDH800: Substation computer for IEC 61850 system integration

SMT-10: Modular I/O expansion unit

UniGear ZS1: Switchgear compatible with REF620E_F

PCM600: Protection and control IED manager

Installation and Maintenance

Pre-installation preparation: Verify switchgear cutout dimensions (177.5×142.5mm). Ground relay chassis via dedicated terminal (0.5mm² min). Use shielded CAT5e/CAT6 cables for Ethernet (max 100m). Apply 1.2Nm torque to current transformer terminals. Configure IEC 61850 SCL files before energization.

Maintenance recommendations: Perform annual insulation resistance tests (>100MΩ @ 500V DC). Verify settings after firmware updates using ABB’s Setting Manager. Check binary input thresholds (+20%/-30% of nominal voltage). Clean air vents with low-pressure air. Replace backup battery (type CR2032) every 5 years. Utilize disturbance recorder for event analysis.