Archives

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

REX615 is a freely configurable all-in-one protection and control relay

for power generation and distribution applications. 

A wide application coverage combined with a fully modular and scalable

hardware and software ensures maximum flexibility and optimal cost-effectivity

throughout the relay life cycle – from tailoring to adapting to changing and new application-specific requirements.

REX615 represents the next step for ABB’s 615 and 620 series relays

in terms of technological innovation, flexibility, cost-effectiveness and standardization.

As part of ABB’s Relion® protection and control family of relays,

REX615 builds on ABB’s strong heritage of freely configurable multifunctional relays and many proven

protection algorithms.

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

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 verified Environmental Product Declaration compliant with ISO 14025

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

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

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 verified Environmental Product Declaration compliant with ISO 14025

Numerical relays are based on the use of microprocessors. 

The first numerical relays were released in 1985.

A big difference between conventional electromechanical and

static relays is how the relays are wired.

Electromechanical and static relays have fixed wiring and the setting is manual.

Numeric relays, on the other hand, are programmable relays where the

characteristics and behavior can be programmed.

Most numerical relays are also multifunctional.

Scope

• Modern protection relays

• Multifunctional protection

Product benefits

• Provide continuity of power to consuments

• Protection of network assets

• Protection against life-threatening electrical incidents

Product features

• Self-checking facility

• Low burden relays improve accuracy

• Fast fiber optical communication with substation LAN

• Adaptive relaying schemes

• Permit storage of historical data

• Time stamping