ABB’s comprehensive service offering ensures life cycle support for medium voltage products
ranging from installation and commissioning, through condition monitoring and plant maintanace programs,
to decommissioning and recycling.
Our global network of service centers and experts help customers to optimize the performance of
their equipment without compromizing on reliablity and safetyDescription.

The REF620 is a dedicated feeder IED perfectly aligned for the
protection, control, measurement and supervision of utility substations and industrial power systems.
REF620 is a member of ABB’s Relion® family and a part of its
620 protection and control product series.
The 620 series IEDs are characterized by flexibility and performance for demanding
utility distribution and industrial applications.
Engineered from the ground up, the 620 series has been designed to unleash the
full potential of the IEC 61850 standard for communication and
interoperability of substation automation devices.
The REF620 NBFNAAAAABC1BNN1XF, part of the ABB Relion 620 family,
is a versatile digital protection device for the protection and control of power systems.
Here are some of the key features and parameters of the product:
Versatility: The REF620 provides integrated protection, measurement, control,
and monitoring capabilities for a variety of voltage levels and network topologies.
Communication capabilities: Support for IEC 61850 standards,
including GOOSE and SV communications, enabling interoperability of smart substations.
Advanced protection functions: including differential protection, overcurrent protection, ground protection,
overtemperature protection and other protection functions.
Advanced measurement features: Provide highly accurate current, voltage, power and energy measurements.
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