ABB REF611 Feeder Protection Relay

ABB REF611 Feeder Protection Relay Supplier and Exporter in India

ARP IMPEX supplies and exports ABB REF611 feeder protection relays from India for medium-voltage switchgear, utility substations, industrial distribution panels and power projects. We accept enquiries for new installations, existing relay replacements, switchgear extensions and plant maintenance requirements.

ABB Relion REF611 is a compact numerical relay used for the protection, control and monitoring of incoming and outgoing feeders. It can be applied to underground cables and overhead distribution lines in radial, ring and meshed networks, including systems with distributed power generation.

The relay covers overcurrent, earth-fault, thermal overload and circuit-breaker failure protection. Depending on the selected configuration, it can provide directional or non-directional protection, voltage measurement, power measurement, auto-reclosing and breaker control.

REF611 is supplied with ready-made configurations, which reduces the amount of engineering required for standard feeder protection schemes. Settings and signals can be adjusted through the local display, Web HMI or ABB PCM600.

Buyers looking for an ABB REF611 feeder protection relay supplier in India should share the complete relay order code or a clear nameplate photograph. REF611 is available in three configurations, and the model name alone does not confirm the protection functions, voltage inputs, auxiliary supply or communication interface.

ABB REF611 Models and Configurations

ABB REF611 is one feeder protection relay family available in three standard configurations:

• ABB REF611 Configuration A
• ABB REF611 Configuration B
• ABB REF611 Configuration C

Each configuration is made for a different feeder and network earthing arrangement.

ABB REF611 Configuration A

Configuration A is mainly selected for feeders requiring directional earth-fault protection.

It is suitable for isolated-neutral and compensated networks where the relay needs residual-current and residual-voltage measurements to identify the direction of an earth fault.

Main functions include:

• Phase overcurrent protection
• Directional earth-fault protection
• Sensitive earth-fault protection
• Transient and intermittent earth-fault protection
• Residual overvoltage protection
• Negative-sequence current protection
• Phase discontinuity protection
• Feeder thermal overload protection
• Circuit-breaker failure protection
• Optional auto-reclosing

Configuration A is commonly used for outgoing overhead lines and cable feeders in networks where selective earth-fault protection is required.

ABB REF611 Configuration B

Configuration B is mainly used for non-directional overcurrent and earth-fault protection.

It is suitable for directly earthed and low-impedance-earthed networks where the relay does not need voltage measurement to determine the direction of the fault.

Main functions include:

• Phase overcurrent protection
• Non-directional earth-fault protection
• Sensitive earth-fault protection
• Negative-sequence current protection
• Phase discontinuity protection
• Feeder thermal overload protection
• Switch-onto-fault protection
• Circuit-breaker failure protection
• Optional auto-reclosing

Configuration B is a practical choice for standard incoming and outgoing feeders where current-based protection is sufficient.

ABB REF611 Configuration C

Configuration C provides directional overcurrent and directional earth-fault protection along with voltage, power and energy measurement.

Main functions include:

• Directional phase overcurrent protection
• Directional earth-fault protection
• Sensitive earth-fault protection
• Transient and intermittent earth-fault protection
• Phase and residual-voltage measurement
• Active and reactive power measurement
• Energy measurement
• Frequency measurement
• Feeder thermal overload protection
• Circuit-breaker failure protection
• Optional auto-reclosing

Configuration C is commonly considered for feeders with bidirectional power flow, industrial generators, renewable power connections and networks with distributed generation.

Technical Specifications

• Brand: ABB
• Product family: Relion 611 Series
• Model: REF611
• Product type: Feeder protection and control relay
• Product version covered: REF611 Version 2.0
• Standard configurations: A, B and C
• Main applications: Incoming and outgoing feeder protection
• Network types: Radial, ring and meshed distribution networks
• Feeder types: Underground cables and overhead lines
• Rated frequency: 50/60 Hz
• Phase-current inputs: Three
• Residual-current input: One
• Phase-current rating: 1 A or 5 A
• Residual-current options: 1/5 A or sensitive 0.2/1 A input
• Voltage inputs: Depend on the selected configuration
• Voltage input range: 60–210 V AC
• Configuration A analogue inputs: Four current inputs and one voltage input
• Configuration B analogue inputs: Four current inputs
• Configuration C analogue inputs: Four current inputs and four voltage inputs
• Binary inputs and outputs: Depend on the configuration and optional input/output module
• Auxiliary supply options: Wide-range AC/DC or low-range DC supply
• Communication protocols: IEC 61850 and Modbus
• Ethernet options: Copper RJ45 or fibre-optic LC
• Serial interface: RS-485
• Network redundancy: HSR, PRP and RSTP in supported versions
• Configuration software: ABB PCM600
• Local interface: Front-panel HMI
• Remote access: Web HMI
• Construction: Withdrawable plug-in relay unit
• Front protection: IP54 when flush mounted
• Operating temperature: Approximately –25°C to +55°C
• Approximate frame size: 177 × 177 mm
• Approximate depth: 201 mm
• Approximate complete weight: 4.1 kg

The exact technical specification must be checked from the complete ABB REF611 order code because the analogue inputs, binary channels, auxiliary supply and communication module can differ.

Features

• Directional and non-directional feeder protection options
• Protection for underground cables and overhead lines
• Three ready-made configurations
• Phase overcurrent protection
• Directional overcurrent protection in Configuration C
• Directional and non-directional earth-fault protection
• Sensitive earth-fault protection
• Transient and intermittent earth-fault detection
• Negative-sequence current protection
• Phase discontinuity protection
• Feeder thermal overload protection
• Residual overvoltage protection
• Circuit-breaker failure protection
• Switch-onto-fault protection
• Optional multi-shot auto-reclosing
• Circuit-breaker opening and closing control
• Trip-circuit supervision
• Current and voltage measurement
• Power, energy and frequency measurement in Configuration C
• Fault and disturbance recording
• Event recording
• Relay self-supervision
• Local and remote operation
• IEC 61850 Edition 1 and Edition 2 support
• GOOSE messaging for interlocking and signal exchange
• Modbus TCP/IP and serial Modbus communication
• Copper and fibre-optic Ethernet options
• Compact panel size
• Withdrawable plug-in construction
• Configuration and setting through ABB PCM600

REF611 is delivered with preconfigured feeder functions, allowing panel builders and project engineers to complete standard protection settings without creating the full relay application from the beginning.

Feeder Protection Functions

REF611 protects the feeder against short circuits, overloads, earth faults and abnormal phase conditions.

The overcurrent stages can be set for normal overload protection as well as faster operation during high fault currents. Earth-fault protection is selected according to the network earthing system and the required sensitivity.

The relay also monitors current unbalance and phase discontinuity, which can help identify conditions such as:

• Open phase
• Blown fuse
• Unequal phase loading
• Loose cable termination
• Unbalanced network current

For an ABB REF611 overcurrent and earth-fault relay quotation, buyers should share the feeder type, network voltage, CT ratio and neutral earthing arrangement.

Auto-Reclosing

Auto-reclosing is available as an option for overhead-line feeder applications.

Temporary faults caused by lightning, branches, birds or external contact may clear after the circuit breaker opens. The auto-reclosing function can close the breaker again after the set dead time, reducing the duration of supply interruptions.

The number of reclosing attempts and operating sequence are set according to the feeder protection scheme.

Circuit-Breaker Control and Supervision

ABB REF611 can control the feeder circuit breaker from the relay display or through a remote control system.

Control and supervision functions include:

• Circuit-breaker opening
• Circuit-breaker closing
• Breaker position indication
• Local and remote control
• Trip-circuit supervision
• Breaker failure protection
• Master trip and lockout operation
• Control through IEC 61850 communication

Trip-circuit supervision checks the breaker trip path and gives an alarm if it detects an open circuit or loss of control voltage.

Measurement and Fault Recording

REF611 records feeder values and operating information that help maintenance teams check why a feeder tripped.

Available information includes:

• Phase currents
• Residual current
• Residual voltage
• Phase voltages in Configuration C
• Active and reactive power in Configuration C
• Energy and frequency in Configuration C
• Fault records
• Disturbance records
• Event logs
• Protection start and trip signals
• Time-stamped operating information

The relay can store fault and event information in non-volatile memory for later review through the local display, Web HMI or PCM600.

ABB REF611 Communication

ABB REF611 can be integrated with SCADA and substation automation systems.

Communication options include:

• IEC 61850 Edition 1
• IEC 61850 Edition 2
• IEC 61850 GOOSE messaging
• Modbus TCP/IP
• Modbus RTU
• Modbus ASCII
• Copper Ethernet through RJ45
• Fibre-optic Ethernet through LC connectors
• RS-485 serial communication
• PRP Ethernet redundancy
• HSR Ethernet redundancy
• RSTP Ethernet ring
• SNTP time synchronisation
• IRIG-B time synchronisation
• IEEE 1588 time synchronisation in supported versions

The required protocol and physical communication port should be confirmed before ordering.

Applications

ABB REF611 is commonly used for:

• Incoming feeder protection
• Outgoing feeder protection
• Underground cable protection
• Overhead-line protection
• Radial distribution feeders
• Ring distribution networks
• Meshed distribution networks
• Directional earth-fault protection
• Non-directional earth-fault protection
• Sensitive earth-fault protection
• Feeder thermal overload protection
• Industrial generator feeders
• Feeders with distributed generation
• Renewable power evacuation feeders
• Medium-voltage switchgear
• Utility distribution substations
• Industrial substations
• Ring-main systems
• Circuit-breaker-controlled feeders
• Auto-reclosing overhead lines
• Existing ABB REF611 replacement requirements

The relay is used across:

• Power utilities
• Switchgear manufacturers
• Panel builders
• EPC contractors
• Power plants
• Steel plants
• Cement plants
• Mining operations
• Oil and gas facilities
• Refineries
• Petrochemical plants
• Water-treatment plants
• Renewable power projects
• Data centres
• Infrastructure facilities
• Large manufacturing plants

ABB positions REF611 for standard feeder protection in utility and industrial distribution systems, including networks with distributed generation.

ABB REF611 Replacement

ABB Library currently lists REF611 IEC in the Classic lifecycle stage. Existing plants may still require the same relay for maintenance, matching spares, switchgear extensions or project standardisation, but availability can depend on the full order code and required quantity.

A replacement relay should not be selected only by comparing the REF611 name on the front panel. The following details must also match:

• Configuration A, B or C
• Product and firmware version
• Phase and residual-current input ratings
• Voltage input arrangement
• Auxiliary supply voltage
• Binary input and output arrangement
• Communication module
• Ethernet or serial interface
• Existing protection settings
• Existing PCM600 configuration
• Panel cut-out and terminal arrangement

For some projects, a newer ABB protection relay such as REX610 or REX615 may be considered, but this is not an automatic one-to-one replacement. The existing functions, wiring and communication setup must be reviewed before confirming an alternative.

Contact us for an ABB REF611 feeder protection relay price, Configuration A, B or C availability, matching replacement or export quotation from India.