ABB REM611 Motor Protection Relay

ABB REM611 Motor Protection Relay Supplier and Exporter in India

ARP IMPEX supplies and exports ABB REM611 motor protection and control relays from India for motor control centres, medium-voltage switchgear, industrial plants and electrical distribution projects.

We handle requirements for new motor protection panels, plant maintenance, matching spares and replacement of existing REM611 relays. Buyers can send the complete ABB part code or relay nameplate for checking, pricing and availability.

ABB Relion REM611 is used for the protection, control and monitoring of small and medium-sized asynchronous motors. It can be used with circuit-breaker-controlled or contactor-controlled motors in process plants, manufacturing facilities and utility applications.

The relay monitors the motor during starting and normal running. It protects against thermal overload, excessive starting time, locked rotor, load jam, phase unbalance, incorrect phase sequence, earth fault and short circuit.

REM611 is supplied with a ready-made motor protection configuration. The protection settings can be adjusted according to the motor rating, starting current, starting time and operating conditions through ABB PCM600.

Request a Quote for ABB REM611

Send the complete ABB REM611 part code, required quantity and destination country for pricing and availability.

For replacement requirements, you can also share a clear photograph of the existing relay nameplate.

Why Buy ABB REM611 from ARP IMPEX?

• Supply against complete ABB part code
• Support for replacement and matching spare requirements
• Quotations for single units and project quantities
• Technical datasheets supplied with the offer
• Part-code and nameplate checking before quotation
• Export packing and shipping assistance
• Support for plant maintenance and shutdown requirements
• Supply for switchgear extensions and new projects
• Assistance with international buyer and EPC enquiries

ARP IMPEX handles ABB REM611 enquiries from industrial users, switchgear manufacturers, panel builders, EPC contractors and overseas buyers looking for an ABB motor protection relay supplier and exporter in India.

ABB REM611 Model and Configuration

ABB REM611 is one motor protection relay model. It is not a product family containing several separate model numbers.

The relay is available with one standard configuration:

ABB REM611 Configuration A

Configuration A is designed for the protection and control of small and medium-sized asynchronous motors.

It is commonly selected for:

• Circuit-breaker-controlled motors
• Contactor-controlled motors
• Medium-voltage motor feeders
• Large low-voltage motor feeders
• Motors using conventional current transformers
• Motors requiring current-based protection
• Industrial drives requiring basic control and monitoring

The relay has three phase-current inputs and one residual-current input.

The residual-current input is available with standard and sensitive input ratings. A sensitive residual-current input may be selected where a core-balance current transformer is used for earth-fault protection.

The protection settings, binary signals and alarm indications can be adjusted through the local display, Web HMI or ABB PCM600.

Technical Specifications

• Brand: ABB
• Product family: Relion 611 Series
• Model: REM611
• Product type: Motor protection and control relay
• Standard configuration: Configuration A
• Motor type: Asynchronous motors
• Motor applications: Small and medium-sized motors
• Control options: Circuit breaker or contactor
• Phase-current inputs: Three
• Residual-current input: One
• Phase-current input rating: 1 A or 5 A
• Residual-current input options: 1/5 A or sensitive 0.2/1 A
• Rated frequency: 50/60 Hz
• Binary inputs: Four
• Binary input voltage: 24–250 V DC
• Auxiliary supply options: Wide-range AC/DC or low-range DC
• Wide-range auxiliary supply: 100–240 V AC or 48–250 V DC
• Low-range auxiliary supply: 24–60 V DC
• Communication protocols: IEC 61850 and Modbus
• Ethernet interfaces: Copper or fibre-optic options
• Serial communication: RS-485
• Configuration software: ABB PCM600
• Local access: 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
• Installation altitude: Up to 2,000 metres
• Approximate frame size: 177 × 177 mm
• Approximate depth: 201 mm
• Approximate relay weight: 4.1 kg

The exact current input rating, auxiliary supply and communication interface must be checked from the complete ABB REM611 part code.

Features

• Motor thermal overload protection
• Motor start-up supervision
• Locked-rotor protection
• Running stall and load-jam protection
• Protection against frequent motor starts
• Motor restart blocking
• Phase overcurrent protection
• Short-circuit protection
• Earth-fault protection
• Sensitive earth-fault protection option
• Negative-sequence current protection
• Current-unbalance protection
• Phase-reversal protection
• Loss-of-load supervision
• Circuit-breaker failure protection
• Emergency motor start function
• Circuit-breaker opening and closing control
• Support for contactor-controlled motors
• Trip-circuit supervision
• Motor running-time monitoring
• Phase-current measurement
• Residual-current measurement
• Fault recording
• Disturbance recording
• Event logging
• Relay self-supervision
• Local and remote operation
• IEC 61850 communication
• GOOSE messaging
• Modbus TCP/IP communication
• Serial Modbus communication
• Copper and fibre Ethernet options
• Compact panel design
• Withdrawable plug-in construction
• Configuration through ABB PCM600

Motor Thermal Overload Protection

REM611 monitors the calculated thermal condition of the motor during starting, normal operation and shutdown.

The relay can issue an alarm, trip the motor or prevent another start when the motor becomes too hot.

This protection is useful for motors with:

• Long starting times
• Frequent starts
• High-inertia loads
• Repeated hot starts
• Heavy operating loads
• Reduced cooling after shutdown

The thermal protection settings are selected according to the motor full-load current, starting current, starting time and cooling conditions.

Motor Start-Up Supervision

REM611 checks the motor current and starting time whenever the motor is started.

It can detect:

• Motor taking too long to accelerate
• Starting current remaining high
• Locked rotor during starting
• Excessive number of starts
• Restart before the motor has cooled
• Motor failing to reach normal running condition

This function is useful for pumps, compressors, crushers, conveyors, mixers and other equipment with demanding starting conditions.

Locked-Rotor and Load-Jam Protection

A mechanical problem can cause a running motor to draw excessive current.

Possible causes include:

• Jammed conveyor
• Blocked crusher
• Seized pump
• Damaged bearing
• Mechanical obstruction
• Locked compressor
• Failure of the driven machine

REM611 can trip the motor when it detects a load jam or locked-rotor condition, helping reduce damage to the motor and connected equipment.

Loss-of-Load Protection

Loss-of-load protection detects an unusual drop in motor current during operation.

This condition may indicate:

• Pump running dry
• Pump losing suction
• Broken conveyor belt
• Failed coupling
• Compressor losing load
• Fan or shaft failure

This function is useful where continued motor operation without a mechanical load could damage the process equipment.

Current-Unbalance Protection

REM611 monitors current unbalance between the three phases.

Current unbalance can result from:

• Open phase
• Blown fuse
• Loose cable connection
• Unequal phase loading
• Poor terminal connection
• Unbalanced electrical supply

Continued motor operation with an unbalanced supply can cause additional heating and reduce motor life.

Phase-Reversal Protection

Phase-reversal protection detects an incorrect phase sequence.

This is important for equipment where reverse rotation can cause mechanical damage or process problems, such as:

• Pumps
• Compressors
• Conveyors
• Fans
• Blowers
• Mixers
• Crushers

Earth-Fault Protection

REM611 provides earth-fault protection through the residual-current input.

A sensitive residual-current version is available for applications using a core-balance current transformer.

For an ABB REM611 earth-fault motor protection relay requirement, buyers should confirm:

• CT ratio
• Core-balance CT details, when used
• Network earthing arrangement
• Required earth-fault sensitivity
• Existing relay part code

Emergency Motor Start

Some industrial processes may require a critical motor to operate even when the relay’s thermal calculation would normally prevent another start.

REM611 provides an emergency-start function for such conditions.

This function should be used only as permitted by the plant operating procedure because it allows the motor to start under increased thermal stress.

Motor Control and Monitoring

REM611 also handles the basic control and monitoring work required in a motor feeder panel.

Available functions cover:

• Circuit-breaker opening and closing
• Contactor-controlled motor operation
• Breaker or contactor position indication
• Local and remote control
• Trip-circuit supervision
• Circuit-breaker failure protection
• Motor running-time monitoring
• Motor start and trip indications
• Relay self-supervision

The relay can be integrated with a SCADA or plant automation system for remote monitoring and control.

Measurement and Fault Recording

REM611 records motor currents and operating information that can help maintenance teams understand why a motor tripped.

Available information includes:

• Phase currents
• Residual current
• Motor starting current
• Fault records
• Disturbance records
• Event logs
• Protection start signals
• Trip signals
• Time-stamped relay events

The information can be checked through the front display, Web HMI or ABB PCM600.

ABB REM611 Communication Options

REM611 can be connected to SCADA, DCS and substation automation systems.

Communication options include:

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

The available protocol and physical interface depend on the communication module included in the ABB REM611 part code.

Applications

ABB REM611 is commonly used for:

• Small asynchronous motors
• Medium-sized asynchronous motors
• Medium-voltage motor feeders
• Large low-voltage motor feeders
• Circuit-breaker-controlled motors
• Contactor-controlled motors
• Pump motor protection
• Compressor motor protection
• Conveyor motor protection
• Crusher motor protection
• Chopper motor protection
• Mixer motor protection
• Agitator motor protection
• Fan motor protection
• Blower motor protection
• Aerator motor protection
• Cooling-water pumps
• Process pumps
• Mine dewatering pumps
• Motor control centres
• Industrial switchgear panels
• New motor protection panels
• Existing ABB REM611 replacement requirements

Industries Using ABB REM611

ABB REM611 motor protection relays are commonly required in:

• Steel plants
• Cement plants
• Mining operations
• Oil and gas facilities
• Refineries
• Petrochemical plants
• Water-treatment plants
• Wastewater-treatment plants
• Power plants
• Paper mills
• Chemical plants
• Fertiliser plants
• Food-processing plants
• Infrastructure projects
• General manufacturing units

ABB REM611 Replacement

For an existing ABB REM611 replacement, the complete part code should be checked before ordering.

Two REM611 relays may look the same from the front but have different:

• Auxiliary supply voltages
• Phase-current input ratings
• Residual-current input ratings
• Communication modules
• Ethernet or serial ports
• Product versions
• Firmware versions
• Existing protection settings

A clear relay nameplate photograph is normally enough to begin the replacement check.

Depending on the application and availability, ABB REM615, REX610 or REX615 may be considered for selected upgrade requirements. These models should not be treated as automatic replacements without checking the existing wiring, protection functions, panel cut-out and communication setup.

Contact us for an ABB REM611 motor protection relay price, part-code availability, matching replacement or export quotation from India.