— Protection and control REX615 All-in-one protection for power generation and distribution applications Interconnection Shunt capacitor protection Automatic voltage regulation Machine protection Transformer protection Feeder/line protection Busbar protection Base functionality 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 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. Optimizing asset management • Brand-new relay but with an impressive history – familiar relay saves time and efforts • Less to learn and less spare devices to store with one relay covering multiple application areas • Extensive life cycle services – long-term global partner with longtime experience close to you in your language • Adaptable to changing requirements for the lifetime of the relay through easy adding or replacing of modules or application packages • Easy access to up-to-date information via the e-business platform ABB Relays-Online • Latest addition to ABB’s renown Relion® relay family – strengthening the REX portfolio Complying with evolving regulations • Interconnection protection package for a better way of connecting to renewables • Compliance with the latest grid codes to ensure renewables remain connected during disturbances • Extensive protection and fault location functionality to ensure compliance with the regulation of electricity utilities to minimize costly downtime • Third-party verifie

Function description Application package Line differential protection with inzone power transformer Binary signal transfer Switch-onto-fault protection Three-phase non-directional overcurrent protection, low stage Three-phase non-directional overcurrent protection, high stage Three-phase non-directional overcurrent protection, instantaneous or definite time stage Three-phase non-directional long time overcurrent protection Three-phase non-directional overcurrent protection, instantaneous only stage Three-independent-phase non-directional overcurrent protection, low stage Three-independent-phase...

Function description Three-phase thermal protection for feeders, cables and distribution transformers Three-phase thermal overload protection, two time constants Three-phase overload protection for shunt capacitor banks Current unbalance protection for shunt capacitor banks Three-phase current unbalance protection for shunt capacitor banks Shunt capacitor bank switching resonance protection, current based Compensated neutral unbalance voltage protection Low-voltage ride-through protection Reverse power/directional overpower protection Underpower protection Three-phase underimpedance protection...

Function description Application package Circuit-breaker control Disconnector control Earthing switch control Disconnector position indication Earthing switch position indication Emergency start-up Circuit breaker uncorresponding position start-up Synchronism and energizing check Tap changer control with voltage regulator, legacy Tap changer control with voltage regulator Transformer data combiner Tap changer position indication Circuit-breaker condition monitoring Motor controlled earthing switch and disconnector supervision Hot-spot and insulation ageing rate monitoring for transformers Trip...

Function description Application package Current total demand, harmonic distortion, DC component (TDD, THD, DC) and individual harmonics Voltage total harmonic distortion, DC component (THD, DC) and individual harmonics Voltage variation Voltage unbalance Individual programmable LED control Standard: Programmable buttons (4 buttons) Wide: Programmable buttons (16 buttons) Disturbance recorder (common functionality) Disturbance recorder, analog channels 1...12 Disturbance recorder, binary channels 1...32 Disturbance recorder, binary channels 33...64 Fault recorder Sequence event recorder Load...

Cyber security Role-based account management including password hardening Relay communication hardening with detection and shielding for Denial of Service attacks Security event logging supporting Central Activity Logging (CAL) via Syslog Secure communication with WebHMI and relay configuration tool Central Account Management with Windows AD Centralised security certificate management with public key infrastructure Hardware Standard Current inputs Voltage inputs Current sensors (according to IEC 61869) Voltage sensors (according to IEC 61869) Binary inputs/Binary outputs RTD/mA inputs Current...