ABB REU615 Voltage Protection and Control Relay

ABB REU615 Voltage Protection and Control Relay Supplier and Exporter in India

ARP IMPEX supplies and exports ABB REU615 voltage protection and control relays from India for substations, power plants, transformer panels, medium-voltage switchgear and industrial power distribution projects.

We handle requirements for new panels, plant maintenance, switchgear extensions and replacement of existing REU615 relays. Buyers can send the complete ABB part code, required quantity and destination country for pricing and availability.

ABB Relion REU615 is used for voltage and frequency protection in utility and industrial electrical networks. It is also used for automatic voltage regulation of power transformers fitted with a motor-operated on-load tap changer.

The relay is available in two standard configurations. Configuration A covers voltage supervision, frequency protection, load shedding, load restoration and synchronism checking. Configuration B is mainly used for transformer voltage regulation and OLTC control. Both versions also provide control, measurement, supervision and fault-recording functions.

Buyers looking for an ABB REU615 voltage protection relay supplier in India should share the complete part code whenever possible. The model name alone does not confirm whether the relay is Configuration A or B, its auxiliary supply, communication card or input and output arrangement.

Request a Quote for ABB REU615

Send the complete ABB REU615 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.

When the complete part code is unavailable, send:

• Required configuration: A or B
• System voltage
• VT ratio and secondary voltage
• Auxiliary supply voltage
• Communication requirement
• Required quantity
• Destination country

For Configuration B, also share the transformer rating and on-load tap-changer details.

Why Buy ABB REU615 from ARP IMPEX?

• Supply against the complete ABB part code
• Support for matching spare and replacement requirements
• Quotations for single units and project quantities
• Part-code and nameplate checking before quotation
• Technical datasheets supplied with the offer
• Export packing and shipping assistance
• Support for plant shutdown and maintenance requirements
• Supply for panel builders, EPC contractors and industrial buyers
• Assistance with international ABB relay enquiries

ARP IMPEX handles enquiries from buyers looking for an ABB REU615 supplier and exporter from India for voltage protection, transformer voltage regulation and substation projects.

ABB REU615 Models and Configurations

ABB REU615 is one configurable relay family with two standard configurations:

• ABB REU615 Configuration A
• ABB REU615 Configuration B

These are application configurations of the same relay, not separate model numbers. The settings and control logic can be adjusted through ABB PCM600 according to the project requirements.

ABB REU615 Configuration A

Configuration A is mainly used for voltage and frequency protection.

It is commonly selected for:

• Busbar voltage supervision
• Undervoltage and overvoltage protection
• Underfrequency and overfrequency protection
• Rate-of-change-of-frequency protection
• Load shedding
• Load restoration
• Synchronism checking
• Distributed generation connections
• Voltage measurement panels
• Optional arc-flash detection

The relay can disconnect less important loads when the network frequency falls and reconnect them after the system returns to an acceptable condition. It also checks voltage, frequency and phase angle before allowing two electrical sections to be connected.

Configuration A is a practical choice for buyers requiring an ABB REU615 undervoltage and overvoltage protection relay for busbars, incomers, generators or industrial distribution systems.

ABB REU615 Configuration B

Configuration B is used for automatic voltage regulation of power transformers fitted with a motor-driven on-load tap changer.

It is commonly selected for:

• Automatic transformer voltage regulation
• Manual OLTC raise and lower control
• Tap-position monitoring
• Transformer undervoltage and overvoltage protection
• Transformer overcurrent backup protection
• Transformer thermal overload monitoring
• Current, voltage, power and energy measurement
• Temperature and analogue measurement through optional RTD and mA inputs

The relay monitors the transformer load-side voltage and sends raise or lower commands to the tap changer when the measured voltage moves outside the set range.

For an ABB REU615 automatic voltage regulator quotation, buyers should share the transformer rating, regulated voltage, number of tap positions, tap step percentage and OLTC details.

Technical Specifications

• Brand: ABB
• Product family: Relion 615 Series
• Model: REU615
• Product type: Voltage protection and control relay
• Product version covered: 5.0 FP1
• Standard configurations: Configuration A and Configuration B
• Configuration A application: Voltage and frequency protection, synchronism checking, load shedding and restoration
• Configuration B application: Automatic voltage regulation and OLTC control
• Rated frequency: 50/60 Hz
• Voltage input rating: 60–210 V AC
• Configuration A analogue inputs: Five voltage inputs
• Configuration B analogue inputs: Three phase-current inputs, one residual-current input and three voltage inputs
• Current input rating: 1 A or 5 A
• Binary inputs and outputs: Depend on the selected hardware arrangement
• Optional RTD inputs: Six with selected Configuration B hardware
• Optional mA inputs: Two with selected Configuration B hardware
• Optional high-speed outputs: Available with selected Configuration A hardware
• 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, Modbus, DNP3 and IEC 60870-5-103
• Process-bus support: IEC 61850-9-2 LE in supported communication configurations
• Ethernet interfaces: Copper RJ45 or fibre-optic LC
• Serial communication: RS-232, RS-485 or serial fibre, depending on the communication module
• Network redundancy: PRP, HSR and RSTP in supported versions
• Configuration software: ABB PCM600
• Local interface: Graphical front-panel HMI
• Remote access: Web HMI
• Construction: Withdrawable plug-in relay unit
• Front protection: IP54 when flush mounted
• Rear terminal protection: IP20
• Operating temperature: –25°C to +55°C
• Installation altitude: Up to 2,000 metres
• Approximate frame size: 177 × 177 mm
• Approximate depth: 201 mm
• Approximate complete relay weight: 4.1 kg

The exact input arrangement, auxiliary supply, binary channels and communication interface must be checked from the complete ABB REU615 part code.

Features

• 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
• Multi-stage load shedding
• Automatic load restoration
• Synchronism and energising checks
• Automatic transformer voltage regulation
• Manual OLTC raise and lower control
• Tap-position monitoring
• Transformer overcurrent backup protection
• Transformer thermal overload protection
• Optional RTD and mA inputs
• Optional arc-light detection in Configuration A
• Optional high-speed trip outputs
• Circuit-breaker opening and closing control
• Disconnector and earthing-switch indication
• Trip-circuit supervision
• Fuse-failure supervision
• Current-circuit supervision in Configuration B
• Voltage and frequency measurement
• Current, power and energy measurement in Configuration B
• Fault recording
• Disturbance recording
• Event logging
• Load-profile recording
• IEC 61850 communication
• GOOSE messaging
• Modbus, DNP3 and IEC 60870-5-103 support
• Local and remote operation
• Withdrawable plug-in construction
• Configuration through ABB PCM600

The available functions depend on whether Configuration A or B is selected and on the hardware included in the full order code.

Voltage and Frequency Protection

REU615 Configuration A monitors the three-phase voltage, residual voltage and system frequency.

It can operate when it detects:

• Voltage falling below the set limit
• Voltage rising above the set limit
• Unbalanced system voltage
• Residual voltage caused by an earth-fault condition
• System frequency becoming too low
• System frequency becoming too high
• Frequency changing faster than the permitted rate

The relay is used where abnormal voltage or frequency can affect busbars, generators, motors, transformers, capacitor banks or connected industrial loads.

Load Shedding and Restoration

REU615 can be used for staged load shedding when the network is overloaded, or the frequency begins to fall.

Less important feeders can be grouped and disconnected in a selected order. This helps keep critical plant loads running and reduces the risk of a complete system shutdown.

After voltage and frequency return to acceptable levels, the relay can support the restoration of disconnected loads according to the configured sequence. Configuration A provides five load-shedding and restoration stages.

Synchronism Check

The synchronism-check function confirms that two electrical sections can be safely connected before the circuit breaker is closed.

It checks:

• Voltage difference
• Frequency difference
• Phase-angle difference
• Whether one or both sides are energised

This function is commonly used for bus couplers, incomers, generator connections and distribution systems with more than one power source.

Automatic Voltage Regulation and OLTC Control

REU615 Configuration B is made for automatic voltage regulation of power transformers equipped with a motor-operated on-load tap changer.

The relay measures the regulated-side voltage and sends tap raise or lower commands when correction is required.

The voltage regulator can also work with:

• Tap-position feedback
• Current measurement
• Power measurement
• Transformer thermal overload protection
• Optional winding, oil or ambient temperature inputs
• Parallel transformer control schemes

Optional RTD and mA inputs can be used for transformer temperature, pressure and tap-position signals.

Arc-Flash Protection

Configuration A can be ordered with optional arc-light detection for the voltage measurement cubicle or busbar compartment.

The arc signal can be sent to the incoming feeder relay through hardwired contacts or IEC 61850 GOOSE messaging. The incoming breaker can then be tripped when the arc signal is confirmed together with an overcurrent condition.

Optional high-speed outputs are also available where faster tripping is required. The arc-protection option is not part of the automatic voltage regulator configuration.

Applications

ABB REU615 is commonly used for:

• Busbar undervoltage protection
• Busbar overvoltage protection
• Busbar voltage supervision
• Residual overvoltage protection
• Positive-sequence undervoltage protection
• Negative-sequence overvoltage protection
• Underfrequency protection
• Overfrequency protection
• Rate-of-change-of-frequency protection
• Load shedding
• Automatic load restoration
• Synchronism-check applications
• Bus-coupler panels
• Transformer incomer panels
• Power generator frequency protection
• Distributed generation connections
• Captive power systems
• Utility interconnection panels
• Capacitor bank voltage protection
• Automatic transformer voltage regulation
• Motor-operated OLTC control
• Tap-position monitoring
• Parallel transformer control schemes
• Voltage measurement cubicles
• Medium-voltage switchgear
• Utility substations
• Industrial substations
• Existing ABB REU615 replacement requirements

ABB positions REU615 for voltage and frequency protection, busbar supervision, load shedding and automatic voltage regulation in utility and industrial distribution systems.

Industries Using ABB REU615

ABB REU615 relays are commonly required in:

• Power utilities
• Utility substations
• Power plants
• Captive power plants
• Transformer substations
• Steel plants
• Cement plants
• Mining operations
• Oil and gas facilities
• Refineries
• Petrochemical plants
• Water-treatment plants
• Renewable power projects
• Data centres
• Infrastructure projects
• Large manufacturing facilities

ABB REU615 Replacement

ABB REU615 is installed in many existing transformer and voltage protection panels. Buyers may require the same relay for plant maintenance, switchgear extensions or matching spare inventory.

Two REU615 relays can differ in:

• Configuration A or B
• Product and firmware version
• Current and voltage input arrangement
• Auxiliary supply
• Binary input and output modules
• RTD and mA module
• Arc-protection option
• Communication card
• Copper, fibre or serial interface
• Existing PCM600 configuration

ABB identifies REX615 as the next step for its earlier 615 and 620 Series relays. REX615 includes voltage protection, load shedding and transformer voltage-regulation applications, but it should not be treated as an automatic replacement without checking the existing hardware, wiring and configuration.

For an ABB REU615 replacement relay, send the complete part code and a clear nameplate photograph. The existing PCM600 file is also useful when available.

Information Required for ABB REU615 Quotation

For pricing and availability, please share:

• Complete ABB REU615 part code or order code
• Required quantity
• Destination country
• Required delivery schedule

For a replacement requirement, also share a clear photograph of the existing relay nameplate.

ARP IMPEX accepts ABB REU615 enquiries against a part code, relay nameplate, bill of quantities, transformer datasheet, single-line diagram or protection schedule.

Contact us for an ABB REU615 voltage protection relay price, Configuration A or B availability, matching replacement or export quotation from India.