REX615 is a freely configurable all-in-one protection relay for

power generation and distribution applications, 

representing the next step for ABB’s 615 and 620 series relays.

Multiapplication coverage combined with a fully modular and scalable

hardware and software ensures maximum flexibility and

optimal cost-effectivity throughout the relay life cycle – and supports sustainability.

Addressing aging infrastructure by

future-proofing the grid

•  Ideal for one-to-one replacement of 615 and 620 series relays as the next step in terms of

technological innovation, flexibility, cost-effectiveness and standardization

•  Easy customization and adaptation to changing protection requirements with modular and

scalable hardware and software

•  Extensive functionality to support the increasing integration of distributed generation and evolving

grid codes

•  Condition monitoring and supervision for optimized component maintenance and return on

investment

•  Relay retrofit program for smooth and easy replacement of SPACOM with REX615 relays

Supporting the digitalization of substations

•  Designed to support the increasing digitalization of substations – with IEC 61850 9-2-based process

bus for future integration with centralized protection

•  Standardized IEC 61850-compliant communication – a cost-effective and ecological choice

•  Smooth interoperability between substation automation devices with the world’s first truly

IEC 61850-based protection relay

•  Optimal cyber security to safeguard critical infrastructure