ABB REM620 Motor Protection Relay

ABB REM620 Motor Protection Relay Suppliers,Exporters in India

ARP IMPEX supplies and exports ABB REM620 motor protection and control relays from India for medium-voltage motors, motor control centres, process plants, switchgear projects and maintenance requirements.

We handle enquiries for new installations, replacement of existing REM620 relays, plant shutdown requirements and matching spares. Buyers can send us the complete ABB order code, relay nameplate, motor details or switchgear drawing for checking and quotation.

ABB Relion REM620 is mainly used for medium-sized and large asynchronous and synchronous motors where differential protection is required. It monitors the motor during starting and normal operation and protects it against internal winding faults, thermal overload, locked rotor, excessive starting time, earth fault, current unbalance, phase reversal and abnormal voltage conditions.

REM620 also covers motor control, temperature monitoring, measurement, fault recording and communication with SCADA or a substation automation system. It is commonly installed with circuit-breaker-controlled and contactor-controlled motors in manufacturing and process industries.

Request a Quote for ABB REM620

For faster selection and pricing, please send:

• Complete ABB REM620 order code
• Clear relay nameplate photograph
• Required quantity
• Motor rating and voltage
• Motor type: asynchronous or synchronous
• Existing relay configuration
• Destination country

We can check the requirement against an exact REM620 order code or review a suitable ABB replacement where the original configuration is no longer readily available.

Specifications

• Brand: ABB
• Product family: Relion 620 Series
• Model: REM620
• Product type: Motor protection and control relay
• Motor applications: Medium-sized and large asynchronous and synchronous motors
• Main configurations: Configuration A and Configuration B
• Main protection functions: Motor differential, thermal overload, start-up supervision, earth-fault and voltage protection
• Current input options: Conventional CT inputs or current sensors
• Voltage input options: Conventional VT inputs or voltage sensors
• RTD inputs: Up to 12, depending on the selected configuration
• mA inputs: Up to 4, depending on the selected configuration
• Communication protocols: IEC 61850, Modbus, DNP3 and IEC 60870-5-103
• Configuration software: ABB PCM600
• Rated frequency: 50/60 Hz
• Construction: Withdrawable plug-in relay unit

The exact input arrangement, auxiliary supply, binary inputs, outputs and communication ports depend on the complete ABB REM620 order code.

ABB REM620 Models and Configurations

REM620 is one motor protection relay family supplied with two main hardware configurations. These are not separate model numbers. The correct version depends on whether the motor panel uses conventional CTs and VTs or current and voltage sensors.

ABB REM620 Configuration A

Configuration A is used with conventional current transformers and voltage transformers.

It provides:

• Six phase-current inputs
• One residual-current input
• Three phase-voltage inputs
• One residual-voltage input
• One voltage input for synchronism check
• Motor differential protection
• Conventional current and voltage measurement
• RTD and mA input options
• Binary input and output options

Six current inputs allow the relay to compare the current at the terminal and neutral ends of the motor winding. This makes Configuration A suitable for motors requiring stabilised or instantaneous differential protection.

Configuration A is normally selected for:

• Medium-voltage motors requiring differential protection
• Large asynchronous motors
• Synchronous motors
• Motors with terminal-side and neutral-side CTs
• Motors requiring extensive RTD temperature monitoring
• Existing conventional switchgear panels

For an ABB REM620 Configuration A quotation, share the terminal-side CT ratio, neutral-side CT ratio, motor winding arrangement and CT secondary rating.

ABB REM620 Configuration B

Configuration B is used with current and voltage sensors.

It provides:

• Three combined current and voltage sensor inputs
• One conventional residual-current input
• Direct sensor connection through RJ45 interfaces
• IEC 61850 process-bus support
• Binary input and output options
• Optional RTD and mA inputs
• Optional high-speed outputs

This version is mainly used in digital or sensor-based medium-voltage switchgear.

Configuration B is commonly selected for:

• Digital motor feeder panels
• Switchgear using Rogowski coil current sensors
• Panels using voltage sensors
• IEC 61850 process-bus applications
• New sensor-based switchgear projects

Conventional motor differential protection using six phase-current inputs is associated with Configuration A. The protection requirement should therefore be checked before replacing Configuration A with a sensor-input version.

Features

• Motor differential protection for larger motors
• Protection for asynchronous and synchronous motors
• Stabilised and instantaneous differential stages
• Motor thermal overload protection
• Motor starting-time supervision
• Locked-rotor and running-stall protection
• Protection against frequent motor starts
• Current-unbalance and phase-reversal protection
• Loss-of-load supervision
• Directional and non-directional earth-fault protection
• Voltage and frequency protection
• Optional RTD and mA inputs
• Optional arc-flash protection
• Optional high-speed trip outputs
• Circuit-breaker and contactor control
• Fault, event and disturbance recording
• Power and energy measurement
• IEC 61850 and GOOSE communication
• Conventional CT and VT input version
• Current and voltage sensor version
• Withdrawable plug-in construction
• Configuration through ABB PCM600

ABB REM620 Motor Protection Functions

Motor Differential Protection

Motor differential protection compares the current entering and leaving the motor winding. A difference between the measured currents may indicate an internal winding or phase fault.

REM620 Configuration A supports:

• Stabilised motor differential protection
• Instantaneous motor differential protection
• High-impedance differential protection
• Flux-balance differential protection
• High-impedance restricted earth-fault protection

Motor differential protection is normally specified for larger or process-critical motors where fast clearance of an internal fault is important.

For correct selection, buyers should share:

• Motor winding arrangement
• Terminal-side CT ratio
• Neutral-side CT ratio
• CT class and burden
• CT secondary current
• Motor rated current

Motor Thermal Overload Protection

REM620 calculates the motor’s thermal condition during starting, normal running and shutdown.

The relay can issue an alarm, trip the motor or prevent another start when the calculated thermal level becomes too high. This is useful for motors with:

• Long starting times
• High-inertia loads
• Frequent starts
• Repeated hot starts
• Heavy or varying loads
• Reduced cooling while stopped

An emergency-start function is available for critical plant conditions where the motor may need to run despite the normal thermal restart restriction.

Motor Start-Up Supervision

REM620 checks the motor current and starting time every time the motor starts.

It can detect:

• Starting time exceeding the set limit
• Motor failing to accelerate
• Starting current remaining high
• Locked rotor during starting
• Too many starts within a set period
• Motor restarting before it has cooled sufficiently

This protection is useful for crushers, mills, conveyors, compressors and other high-inertia applications.

Locked-Rotor and Load-Jam Protection

A mechanical fault can cause motor current to rise sharply while the motor is already running.

Possible causes include:

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

REM620 can trip the motor before the high current causes serious damage to the motor, coupling or connected machine.

Loss-of-Load Protection

Loss-of-load supervision detects an unusual drop in motor current.

This may indicate:

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

Current-Unbalance Protection

Negative-sequence current protection detects unbalanced phase currents that can cause additional motor heating.

Common causes include:

• Blown fuse
• Open phase
• Loose electrical connection
• Unequal phase loading
• Supply voltage unbalance

Phase-Reversal Protection

Phase-reversal protection detects the wrong phase sequence.

This is important for pumps, compressors, fans, crushers and conveyors where reverse rotation can damage the equipment or disrupt the process.

Overcurrent and Short-Circuit Protection

REM620 provides several stages of phase overcurrent protection.

Protection functions include:

• Low-set overcurrent
• High-set overcurrent
• Instantaneous overcurrent
• Directional overcurrent
• Voltage-dependent overcurrent
• Circuit-breaker failure protection
• Master trip and lockout functions

These functions provide backup protection for motor feeder and external system faults.

Earth-Fault Protection

REM620 supports different earth-fault arrangements depending on the network and motor connection.

Protection options include:

• Non-directional earth-fault protection
• Directional earth-fault protection
• Sensitive earth-fault protection
• Restricted earth-fault protection
• Residual overvoltage protection
• Rotor earth-fault protection

A sensitive residual-current input can be selected where a core-balance current transformer is used.

For an ABB REM620 earth-fault protection relay quotation, mention the network earthing method and whether residual current is measured through a separate core-balance CT.

Voltage and Frequency Protection

REM620 can protect the motor against unsuitable supply conditions.

Functions include:

• Three-phase undervoltage protection
• Three-phase overvoltage protection
• Positive-sequence undervoltage protection
• Negative-sequence overvoltage protection
• Residual overvoltage protection
• Underfrequency protection
• Overfrequency protection
• Rate-of-change-of-frequency protection
• Fuse-failure supervision
• Synchronism and energising check

These functions help prevent overheating, loss of torque and unstable motor operation caused by abnormal system voltage or frequency.

Protection for Synchronous Motors

REM620 can also be used for selected synchronous motor applications.

The optional synchronous motor protection package covers functions such as:

• Underexcitation protection
• Directional overpower protection
• Underpower protection
• Directional reactive power protection
• Low-voltage ride-through protection
• Rotor earth-fault protection

When sending an enquiry, clearly mention whether the motor is asynchronous or synchronous. The required protection functions and relay configuration will be different.

RTD and Temperature Monitoring

REM620 can be supplied with RTD and mA inputs for direct monitoring of motor and process temperatures.

Depending on the hardware configuration, these inputs may be used for:

• Stator winding temperature
• Motor bearing temperature
• Pump bearing temperature
• Cooling-air temperature
• Motor body temperature
• Process pressure
• Liquid level
• Other transmitter signals

Selected REM620 configurations support up to 12 RTD inputs and four mA inputs.

For an ABB REM620 relay with RTD inputs, share:

• Number of RTD sensors
• RTD sensor type
• Sensor resistance
• Measurement location
• Alarm and trip requirements

Arc-Flash Protection

REM620 can be ordered with up to three arc-light detection channels.

Arc sensors may be installed in the:

• Circuit-breaker compartment
• Busbar compartment
• Cable termination compartment

The relay can combine the arc-light signal with an overcurrent condition for fast tripping during an internal switchgear fault.

Optional high-speed outputs are also available. The arc sensor interface and high-speed output module must be confirmed in the ABB order code.

Control, Measurement and Recording

REM620 also handles several motor feeder control and monitoring functions.

These include:

• Circuit-breaker opening and closing
• Contactor control
• Disconnector control
• Earthing-switch control
• Position indication
• Circuit-breaker condition monitoring
• Trip-circuit supervision
• Current-circuit supervision
• Fuse-failure supervision
• Motor running-time monitoring
• Fault recording
• Event recording
• Disturbance recording
• Load-profile recording
• Local and remote operation
• Power and energy measurement

The relay has a graphical local display. Control, alarm, setting-group and acknowledgement functions can be assigned to its programmable front-panel buttons.

Technical Specifications

• Brand: ABB
• Series: Relion 620
• Model: REM620
• Relay type: Motor protection and control relay
• Product version: IEC 2.0 FP1
• Motor types: Asynchronous and synchronous
• Rated frequency: 50 or 60 Hz
• Conventional phase-current inputs: Up to six
• Residual-current input: One
• CT secondary rating: 1 A or 5 A
• Sensitive residual-current option: 0.2/1 A
• Conventional voltage inputs: Three phase-voltage inputs
• Residual-voltage input: One
• Synchronism-check voltage input: One
• Voltage input range: 60–210 V AC
• Sensor inputs: Three combined current and voltage sensor inputs in Configuration B
• Binary inputs: Up to 28, depending on configuration
• RTD inputs: Up to 12
• mA inputs: Up to four
• Auxiliary supply, high range: 100–240 V AC or 48–250 V DC
• Auxiliary supply, low range: 24–60 V DC
• Continuous operating temperature: –25°C to +55°C
• Front protection: IP54 when flush mounted
• Rear terminal protection: IP20
• Installation altitude: Up to 2,000 metres
• Approximate frame size: 262.2 × 177 mm
• Approximate depth: 201 mm
• Complete relay weight: Up to approximately 5.1 kg
• Configuration software: ABB PCM600
• Construction: Withdrawable plug-in unit

The final specifications must be confirmed from the complete order code because the input modules, output modules, auxiliary supply and communication interfaces can differ.

ABB REM620 Communication Options

Communication options include:

• IEC 61850 Edition 1 and Edition 2
• IEC 61850 GOOSE messaging
• IEC 61850-9-2 LE sampled values
• Modbus TCP/IP
• Modbus RTU and ASCII
• DNP3 TCP/IP
• DNP3 serial
• IEC 60870-5-103
• Copper Ethernet
• Fibre-optic Ethernet
• RS-232
• RS-485
• PRP Ethernet redundancy
• HSR Ethernet redundancy
• RSTP Ethernet ring
• SNTP time synchronisation
• IRIG-B time synchronisation
• IEEE 1588 time synchronisation in supported configurations

The protocol and physical port must be checked from the communication module fitted in the relay.

Applications

ABB REM620 motor protection relays are used for:

• Medium-voltage asynchronous motors
• Medium-voltage synchronous motors
• Large low-voltage motors
• Motors requiring differential protection
• Pump motors
• Compressor motors
• Conveyor drives
• Crushers and choppers
• Mills and grinders
• Mixers and agitators
• Fans and blowers
• Aerators
• Boiler-feed pumps
• Cooling-water pumps
• Mine dewatering pumps
• Refinery process pumps
• Large motor control centres
• Circuit-breaker-controlled motors
• Contactor-controlled motors
• Motors with RTD temperature monitoring
• Digital switchgear using current and voltage sensors
• Arc-flash-protected motor feeders
• Existing REM620 replacement requirements

Common industries include:

• Steel plants
• Cement plants
• Mining projects
• Oil and gas facilities
• Refineries
• Petrochemical plants
• Power plants
• Water-treatment facilities
• Paper mills
• Chemical plants
• Fertiliser plants
• Large manufacturing units

ABB identifies pumps, conveyors, crushers, choppers, mixers, agitators, fans and aerators among the typical drive applications for REM620.

ABB REM620 Replacement and REX615 Migration

REM620 is widely installed in existing motor control and switchgear panels. Buyers may still require an exact matching relay for plant maintenance, panel extension or spare inventory.

ABB identifies REX615 as the next step for its earlier 615 and 620 series relays. REX615 is available in a wide case corresponding to the mechanical format of the 620 series and includes machine protection application packages.

A REM620 replacement should not be selected by comparing only the model name or front dimensions.

The following must be checked:

• Complete REM620 order code
• IEC or ANSI version
• Product and firmware version
• Configuration A or B
• Motor type
• Protection functions
• Terminal-side CT ratio
• Neutral-side CT ratio
• CT or sensor arrangement
• VT inputs
• Auxiliary supply
• Binary input voltage
• Input and output modules
• RTD and mA requirements
• Arc-protection option
• Communication card
• Communication protocol
• Existing PCM600 configuration
• IEC 61850 files
• Panel cut-out and terminal arrangement

Depending on the installed relay and current availability, the requirement may be met with a matching REM620 unit or a properly configured ABB REX615 replacement.

ARP IMPEX accepts enquiries against an ABB order code, relay nameplate, motor datasheet, bill of quantities, protection schedule or switchgear drawing.

Contact us for an ABB REM620 motor differential protection relay price, configuration check, matching replacement or export quotation from India.

ARP IMPEX handles export enquiries for ABB REM620 relays and replacement requirements from India, subject to order-code availability and technical confirmation.