ABB REF601 Feeder Protection Relay

ABB REF601 Feeder Protection Relay Supplier and Exporter in India

ARP IMPEX supplies and exports ABB REF601 feeder protection and control relays from India for medium-voltage switchgear, utility substations, industrial distribution panels and feeder protection requirements.

We handle enquiries for new projects, plant maintenance, switchgear extensions and replacement of existing REF601 relays. Buyers can send the complete ABB order code, required quantity and destination country for pricing and availability.

ABB Relion REF601 is a compact feeder protection and control relay from the 605 Series. It is used for incoming and outgoing feeders in primary and secondary distribution networks. Common applications include overhead lines, cable feeders and distribution transformer feeders in solidly earthed, resistance-earthed and isolated networks.

REF601 covers the main protection functions normally required on a basic MV feeder, including overcurrent, earth fault, transformer inrush detection, thermal overload and circuit-breaker supervision. Higher application configurations also provide negative-sequence protection and autoreclosing for overhead feeders.

The current REF601 is available with conventional current-transformer inputs or Rogowski current sensor inputs. ABB’s latest version also supports PCM600 access through a front USB-C port, selectable 1 A/5 A CT secondary, disturbance recording and configurable binary I/O.

Buyers searching for an ABB REF601 supplier in India, ABB REF601 price, feeder protection relay for MV switchgear or REF601 replacement can send the existing part code or relay nameplate for checking.

Request a Quote for ABB REF601

For ABB REF601 pricing and availability, please share:

• Complete ABB REF601 part number or order code
• Required quantity
• Destination country
• Required delivery schedule

For replacement requirements, also send:

• Clear photograph of the existing REF601 nameplate
• Existing product version, if known

Why Buy ABB REF601 from ARP IMPEX?

• Supply against complete ABB order code
• Support for current and existing REF601 requirements
• Part-code and nameplate checking
• Quotations for single units and project quantities
• Support for CT and current-sensor variants
• Technical datasheets with quotation
• Assistance with replacement requirements
• Export packing and international shipping support
• Supply for utilities, EPC contractors and panel builders
• Support for industrial maintenance and shutdown requirements

Contact ARP IMPEX for an ABB REF601 feeder protection relay quotation from India for new switchgear, existing installations or replacement requirements.

ABB REF601 Models and Configurations

ABB REF601 is one feeder protection and control relay model rather than a family containing different model numbers.

The current product is available with four application configurations:

• ABB REF601 Configuration B
• ABB REF601 Configuration C
• ABB REF601 Configuration D
• ABB REF601 Configuration F

REF601 can also be ordered with conventional CT inputs or Rogowski current sensor inputs. The final hardware and functions depend on the complete order code.

ABB REF601 Configuration B

Configuration B covers the basic protection required for incoming and outgoing feeders.

Main functions include:

• Three-stage phase overcurrent protection
• Earth-fault protection
• Transformer inrush detection
• Master trip
• Circuit-breaker control
• Trip-circuit supervision
• Phase-current measurement
• Residual-current measurement
• Two protection setting groups

This configuration is commonly used where straightforward overcurrent and earth-fault feeder protection is required.

Typical applications include:

• MV incoming feeders
• Outgoing cable feeders
• Basic industrial distribution feeders
• Distribution transformer feeders
• Compact secondary switchgear

ABB REF601 Configuration C

Configuration C adds more feeder and equipment protection to the basic package.

Main functions include:

• Phase overcurrent protection
• Earth-fault protection
• Transformer inrush detection
• Thermal overload protection
• Phase-discontinuity protection
• Circuit-breaker failure protection
• Circuit-breaker control
• Trip-circuit supervision
• Current and thermal measurements

It is commonly selected for cable feeders and transformer feeders where thermal loading and phase-loss conditions also need to be monitored.

ABB REF601 Configuration D

Configuration D provides broader feeder protection and is particularly useful for overhead-line applications.

Along with the functions available in Configuration C, it adds:

• Negative-sequence overcurrent protection
• Multi-shot autoreclosing
• Additional feeder monitoring functions

ABB specifically identifies Configuration D as suitable for overhead-line feeders because of its autoreclosing function.

Typical applications include:

• Overhead distribution feeders
• Rural distribution lines
• Utility feeder panels
• Feeders where automatic reclosing is required
• Distribution systems exposed to temporary line faults

ABB REF601 Configuration F

Configuration F is the newer REF601 application configuration and is available specifically with REF601. It expands the relay’s monitoring, recording and logic capability.

Functions include:

• Feeder protection functions
• Circuit-breaker control
• Autoreclosing
• Cold-load pickup
• Circuit-breaker condition monitoring
• Demand-current measurement
• Disturbance recording
• AND, OR and NOT logic gates
• ON-delay and OFF-delay timers

Configuration F is useful where buyers want the compact REF601 platform but need more information from the feeder and greater flexibility in the control logic.

ABB REF601 CT and Sensor Variants

ABB REF601 can be ordered with two current-measurement arrangements.

Conventional CT Variant

The conventional CT version uses:

• Three phase-current inputs
• One residual / earth-current input
• Site-selectable 1 A or 5 A CT secondary on the latest version

The residual current can be calculated from the phase currents or measured separately through a core-balance CT where the application requires more sensitive earth-fault measurement.

Rogowski Current Sensor Variant

REF601 is also available with Rogowski current sensor inputs.

The sensor version uses:

• Three phase-current sensor inputs
• Separate earth-current input
• ABB KECA/compatible current sensor arrangements depending on the installation

The sensor version is useful in compact MV switchgear where reducing conventional CT size and standardising the current measurement arrangement are important.

Technical Specifications

• Brand: ABB
• Product family: Relion 605 Series
• Model: REF601
• Product type: Feeder protection and control relay
• Current documented product version: 2.6
• Applications: Incoming and outgoing MV feeders
• Application configurations: B, C, D and F
• Protection standards: IEC, ANSI and CN versions available
• Current input options: Conventional CT or Rogowski current sensor
• Conventional CT inputs: Three-phase currents plus earth/residual current
• CT secondary selection: 1 A or 5 A selectable in the current version
• Rated frequency: 50/60 Hz
• Binary I/O options: 4 BI + 6 BO or 6 BI + 4 BO in the current version
• Auxiliary supply: Wide-range AC/DC supply
• Serial communication: RS-485
• Communication protocols: Modbus RTU and IEC 60870-5-103
• Protocol selection: Site selectable on the current version
• Configuration software: ABB PCM600
• Front communication: USB Type-C on the current version
• Local interface: LCD HMI
• Breaker control: Available on REF601
• Disturbance recording: Available in applicable configuration
• Event recording: Available
• Fault recording: Available
• Trip-circuit supervision: Available
• Breaker condition monitoring: Available in applicable configuration
• Mounting: Flush panel mounting with press-fit arrangement
• Circuit-breaker integration: Suitable for integration with applicable ABB VD4 and HD4 arrangements
• Approximate frame width: 130 mm
• Approximate frame height: 160 mm
• Approximate depth: 151.5 mm
• Installation altitude: Up to 2,000 m

ABB’s April 2026 release added the alternative 6 BI + 4 BO arrangement alongside 4 BI + 6 BO and also improved current protection, disturbance recording and cybersecurity functions. Exact specifications should therefore be checked against the full REF601 order code and product version.

Features

• Three-stage phase overcurrent protection
• Multi-stage earth-fault protection
• Short-circuit protection
• Transformer inrush-current detection
• Thermal overload protection
• Phase-discontinuity protection
• Negative-sequence overcurrent protection
• Circuit-breaker failure protection
• Multi-shot autoreclosing
• Cold-load pickup
• Circuit-breaker control
• Trip-circuit supervision
• Circuit-breaker condition monitoring
• Phase-current measurement
• Earth-current measurement
• Negative-sequence current measurement
• Demand-current measurement
• Two protection setting groups
• Event recording
• Fault recording
• Disturbance recording
• Relay self-supervision
• Configurable binary inputs and outputs
• Basic programmable logic and timers
• Conventional CT version
• Rogowski current sensor version
• Modbus RTU communication
• IEC 60870-5-103 communication
• PCM600 configuration
• Front USB-C access on the latest version
• Compact panel-mounting design

The functions available depend on the selected REF601 configuration and product version.

Overcurrent and Earth-Fault Protection

Overcurrent and earth-fault protection form the main protection package of REF601.

The relay can be used for faults such as:

• Phase-to-phase short circuit
• Three-phase short circuit
• Phase-to-earth fault
• Feeder overload
• High-current feeder faults

REF601 provides several protection stages so different pickup currents and operating times can be coordinated with upstream and downstream protection devices. ABB supports definite-time and inverse-time characteristics for its lower protection stages.

Distribution Transformer Protection

REF601 can also be used as the main current-based protection relay for distribution transformer feeders.

Its transformer inrush detector helps prevent unnecessary tripping when the transformer is energised and draws temporary magnetising inrush current.

Typical applications include:

• Distribution transformer incomers
• Package substations
• Transformer feeder panels
• Industrial transformer protection
• Utility secondary substations

Autoreclosing for Overhead Feeders

REF601 Configuration D and the applicable higher configuration support autoreclosing for overhead feeder applications.

Many overhead-line faults are temporary. The relay can open the breaker after a fault and attempt to restore the feeder according to the configured reclosing sequence.

This makes REF601 useful for buyers searching for an ABB feeder relay with auto reclose for rural distribution networks and overhead feeders.

Cold-Load Pickup

Current REF601 versions include cold-load pickup functionality in the applicable configuration.

After a feeder has remained switched off for some time, the current immediately after restoration may be higher than its normal running level. Cold-load pickup logic allows the protection scheme to handle this temporary condition without simply increasing the normal feeder protection setting.

This function is useful for:

• Utility distribution feeders
• Residential distribution circuits
• Commercial distribution feeders
• Feeders carrying transformer-heavy loads

Breaker Control and Monitoring

Unlike the related ABB REJ601, REF601 includes circuit-breaker control. ABB describes REJ601 as the feeder protection version without breaker control, while REF601 combines feeder protection and breaker control.

REF601 can provide:

• Circuit-breaker open command
• Circuit-breaker close command
• Breaker position monitoring
• Trip-circuit supervision
• Breaker operating information
• Basic breaker condition monitoring in applicable configurations

This makes REF601 a practical choice where protection and basic feeder control need to be handled by the same compact device.

Applications

ABB REF601 is commonly used for:

• Incoming feeder protection
• Outgoing feeder protection
• Medium-voltage cable feeder protection
• Overhead-line feeder protection
• Distribution transformer feeder protection
• Short-circuit protection
• Overcurrent protection
• Earth-fault protection
• Sensitive earth-fault applications
• Thermal protection of feeders and cables
• MV switchgear feeder panels
• Secondary distribution substations
• Primary distribution panels
• Compact switchgear
• Ring main unit feeder applications
• Package substations
• Utility distribution networks
• Industrial power distribution
• Rural overhead distribution feeders
• Autoreclosing feeder applications
• Retrofit protection panels
• Existing ABB REF601 replacement requirements

ABB currently positions REF601 specifically as an entry-level protection and control relay for primary and secondary distribution applications, including overhead lines and cable feeders.

Industries Using ABB REF601

REF601 requirements commonly come from:

• Electricity distribution utilities
• Industrial substations
• Manufacturing plants
• Steel plants
• Cement plants
• Mining facilities
• Oil and gas facilities
• Water-treatment plants
• Renewable-energy projects
• Infrastructure projects
• Commercial distribution systems
• EPC contractors
• MV switchgear manufacturers
• Panel builders

ABB identifies utilities, industrial users and renewable-generation projects among the target segments for the current 601 Series.

ABB REF601 Replacement

ABB REF601 has been supplied in several product versions, so a buyer replacing an existing unit should not order only by the model name.

The replacement relay may need to match:

• Existing product version
• Configuration B, C, D or F
• CT or Rogowski sensor inputs
• CT secondary arrangement
• Binary input/output arrangement
• Auxiliary supply
• Communication card
• Modbus or IEC 60870-5-103 requirement
• Existing settings and logic

ABB continues to develop REF601: Version 2.5 was released in 2024, and the current Version 2.6 received further functionality in April 2026.

Contact us for an ABB REF601 feeder protection relay price, REF601 Configuration B/C/D/F, CT or Rogowski sensor variant, existing REF601 replacement, or an international export quotation from India.