Scope

All-in-one protection and control REX615

Benefits

• Wide application coverage with one freely configurable device for flexible and

cost-effective tailoring to application-specific requirements

• Ready-made application packages for convenient and smooth ordering

• Easy and flexible adaptation to changing protection and communication requirements with fully modular hardware and software

• Unique earth-fault protection portfolio for optimal selectivity, sensitivity and reliability – irrespective of the type of network and fault

• The world’s first truly IEC 61850-based protection relay – designed to support the increasing digitalization of substations

• Over 1 million 615 and 620 series relays installed worldwide – demonstrating reliability and commitment to continuous evolvement

• Intuitive human-machine interface (HMI) with a large graphical display for showing customizable single-line diagrams (SLD)

• Optional full conformal coating for outstanding performance also in the most extreme environments

• Convenient, tailor-made retrofit connector kit for fast and easy replacement of SPACOM with REX615 relays

Features

• IEC 61850 Edition 2.1 and Edition 1. with redundancy support based on HSR and PRP

• Ability to receive two streams of sampled measured values (SMVs) and send one via

IEC 61850-9-2 LE-based process bus communication

• Multifrequency admittance-based earth-fault protection (MFA) for optimal selectivity, sensitivity and reliability also in compensated and isolated networks

• Touch voltage-based earth-fault protection for an optimal balance between safety and supply quality also in compensated networks

• Compliance with the latest grid codes to ensure renewables remain connected during disturbances

• Withdrawable plug-in unit design for swift installation, maintenance and testing

• Optimal cyber security to promote secure connectivity and safeguard today’s network

• Three lens-type arc flash light detection sensors for extended personnel safety