ABB SMU615 Substation Merging Unit

ABB SMU615 Substation Merging Unit Supplier and Exporter in India

ARP IMPEX supplies and exports ABB SMU615 Substation Merging Units from India for digital substations, medium-voltage switchgear, IEC 61850 process-bus projects and substation automation requirements.

We handle enquiries for new projects, switchgear extensions, existing SMU615 replacement and maintenance spares. Buyers can send the complete ABB SMU615 order code, required quantity and destination country for pricing and availability.

ABB SMU615 is part of the Relion family and provides the connection between switchgear primary equipment and protection or control devices. It measures current and voltage signals from conventional instrument transformers or sensors and sends these measurements digitally over the IEC 61850 process bus.

Instead of taking separate CT and VT wiring all the way to every protection relay, SMU615 can send sampled current and voltage values over Ethernet using IEC 61850-9-2 LE. This makes it useful in digital substation projects where reduced copper wiring, supervised communication and flexible protection architecture are required.

SMU615 itself does not provide feeder, transformer, motor or busbar protection. The protection decision is made by another protection device. Where Configuration B is used, SMU615 can receive trip commands over GOOSE and operate physical outputs connected to the circuit breaker.

Buyers looking for an ABB SMU615 supplier in India, SMU615 merging unit price, IEC 61850 merging unit or replacement SMU615 can share the complete order code or existing unit nameplate for checking.

Request a Quote for ABB SMU615

For ABB SMU615 pricing and availability, please share:

• Complete ABB SMU615 order code
• Required quantity
• Destination country
• Required delivery schedule

For replacement requirements, also share:

• Clear photograph of the existing SMU615 nameplate
• Existing application configuration
• CT/VT or sensor input arrangement
• PCM600 configuration file, if available

Why Buy ABB SMU615 from ARP IMPEX?

• Supply against complete ABB order code
• Support for SMU615 Configuration A and B requirements
• CT/VT and sensor-input variant checking
• Support for matching spare and replacement requirements
• Quotations for single units and project quantities
• Technical datasheets with the offer
• Nameplate and order-code checking before quotation
• Export packing and international shipping assistance
• Supply support for EPC contractors, panel builders and industrial buyers

ARP IMPEX handles enquiries from buyers looking for an ABB SMU615 supplier and exporter from India for digital substations, process-bus applications and medium-voltage switchgear projects.

ABB SMU615 Models and Configurations

SMU615 is one product family with two application configurations:

• ABB SMU615 Configuration A
• ABB SMU615 Configuration B

Both configurations can be ordered for conventional CT/VT measurement or sensor-based measurement.

ABB SMU615 Configuration A – Merging Unit with Analogue Inputs

Configuration A is mainly used where SMU615 is required to measure electrical quantities and send them digitally to protection and control devices.

Main functions include:

• Three-phase current measurement
• Residual current measurement
• Three-phase voltage measurement
• Sequence current measurement
• Sequence voltage measurement
• Power and energy measurement
• Frequency measurement
• IEC 61850-9-2 LE sampled-value transmission
• Disturbance recording
• Current-circuit supervision
• Fuse-failure supervision
• Trip-circuit supervision
• Optional arc-light detection

Configuration A does not provide the primary-device remote-control functions included with Configuration B.

It is commonly selected for:

• Digital substation measurement
• IEC 61850 process-bus systems
• Centralised protection schemes
• Digital MV switchgear
• CT/VT signal digitisation
• Sensor-based switchgear applications

ABB SMU615 Configuration B – Merging Unit with Binary I/O and Remote Control

Configuration B adds physical binary inputs, additional outputs and control of switchgear primary equipment.

It supports:

• Circuit-breaker control
• Circuit-breaker position indication
• Disconnector control
• Disconnector position indication
• Earthing-switch control
• Earthing-switch position indication
• Circuit-breaker condition monitoring
• Trip-circuit supervision
• GOOSE-based trip command reception
• High-speed output options

Configuration B has eight binary inputs and up to nine binary outputs, including three high-speed outputs in the applicable hardware arrangement.

It is commonly used where the merging unit also needs to provide a physical connection between the digital substation network and the circuit breaker, disconnector or earthing switch.

Conventional CT/VT and Sensor Versions

Both SMU615 configurations are available with different analogue input arrangements.

Conventional CT and VT Inputs

The conventional measurement version provides:

• Three phase-current inputs
• One residual-current input
• Three phase-voltage inputs
• Phase-current rating of 1 A / 5 A
• Residual-current rating of 0.2 A / 1 A
• Voltage input range of 60–210 V AC

This version is useful for digital substation projects where conventional current transformers and voltage transformers are already installed.

Current and Voltage Sensor Inputs

SMU615 can also be supplied for direct connection to three combined current and voltage sensors through RJ45 connections. Separate current and voltage sensors can also be connected using suitable adapters. A conventional sensitive residual-current input is retained in the sensor arrangement.

This version is commonly used for:

• Sensor-based medium-voltage switchgear
• Digital switchgear
• Rogowski coil current measurement
• Voltage sensor measurement
• New IEC 61850 process-bus installations

The exact sensor input module and supported primary-voltage range should be confirmed from the full SMU615 order code.

Technical Specifications

• Brand: ABB
• Product family: Relion
• Model: SMU615
• Product type: Substation Merging Unit
• Product version: 1.0
• Application configurations: A and B
• Configuration A: Merging unit with analogue inputs
• Configuration B: Merging unit with analogue inputs, binary I/O and remote control
• Measurement options: Conventional CT/VT or current and voltage sensors
• Phase-current inputs: Three with conventional CT version
• Phase-current rating: 1 A / 5 A
• Residual-current input: One
• Residual-current rating: 0.2 A / 1 A
• Phase-voltage inputs: Three with conventional VT version
• Voltage input range: 60–210 V AC
• Sensor inputs: Three combined sensor connections in sensor versions
• Rated frequency: 50/60 Hz
• Process bus: IEC 61850-9-2 LE
• Sampled values: Current and voltage measurements over Ethernet
• Station communication: IEC 61850 Edition 1 and Edition 2
• GOOSE messaging: Supported
• Time synchronisation: IEEE 1588 v2 PTP
• Ethernet redundancy: HSR and PRP
• Ethernet interfaces: Copper RJ45 or fibre-optic LC depending on communication module
• Configuration software: ABB PCM600
• Remote interface: Web HMI
• Configuration A binary outputs: 4 power outputs + 2 signal outputs
• Configuration B binary inputs: 8
• Configuration B binary outputs: 4 power outputs + 2 signal outputs + 3 high-speed outputs
• Optional arc-light inputs: Three
• Auxiliary supply options: AC and DC versions available
• AC auxiliary ratings: 100, 110, 120, 220 or 240 V AC
• Wide DC ratings: 48, 60, 110, 125, 220 or 250 V DC
• Low DC ratings: 24, 30, 48 or 60 V DC
• Operating temperature: –25°C to +55°C continuously
• Installation altitude: Up to 2,000 m
• Front protection: IP54 when flush mounted
• Rear terminal protection: IP20
• Approximate dimensions: 177 × 177 × 201 mm
• Approximate complete weight: 4.1 kg
• Construction: Withdrawable plug-in unit

The exact input module, binary I/O, auxiliary supply and Ethernet interface depend on the complete SMU615 order code.

Features

• Dedicated IEC 61850 substation merging unit
• IEC 61850-9-2 LE sampled-value transmission
• Current and voltage measurement
• Conventional CT and VT support
• Current and voltage sensor support
• Three-phase current measurement
• Residual current measurement
• Three-phase voltage measurement
• Sequence current and voltage measurement
• Power and energy measurement
• Frequency measurement
• IEC 61850 Edition 1 and Edition 2
• Fast GOOSE messaging
• IEEE 1588 v2 high-accuracy time synchronisation
• HSR Ethernet redundancy
• PRP Ethernet redundancy
• Copper and fibre-optic Ethernet options
• Disturbance recording
• Current-circuit supervision
• Fuse-failure supervision
• Trip-circuit supervision
• Built-in self-supervision
• Optional three-channel arc-light detection
• Circuit-breaker condition monitoring in Configuration B
• Circuit-breaker control in Configuration B
• Disconnector control in Configuration B
• Earthing-switch control in Configuration B
• High-speed binary outputs in Configuration B
• PCM600 configuration
• Web HMI access
• Compact withdrawable construction

ABB positions SMU615 specifically as the physical interface between switchgear primary equipment and protection devices in IEC 61850-based digital substations.

IEC 61850 Process Bus

One of the main applications of SMU615 is transferring current and voltage measurements through the substation Ethernet network instead of separate analogue wiring to each relay.

SMU615 sends four current and four voltage sampled values, covering phase and residual quantities. ABB specifies a sampling rate of 4000 or 4800 samples per second depending on whether the system frequency is 50 or 60 Hz.

Protection relays connected to the same process bus can use these measurements for their protection functions.

This arrangement is useful for:

• Centralised protection
• Digital substations
• Process-bus switchgear
• Reduced secondary wiring
• Expansion of existing protection systems
• Sensor-based MV switchgear

SMU615 with Centralised Protection

SMU615 can be used with a centralised protection device where one merging unit is installed at each feeder.

Each SMU615 measures the feeder current and voltage and sends the sampled values over Ethernet to the centralised protection system. The same network can also carry GOOSE signals for switchgear status and control. ABB specifically illustrates SMU615 in this type of smart-substation architecture.

This makes SMU615 relevant for buyers searching for an ABB merging unit for centralised substation protection or an IEC 61850 merging unit for digital switchgear.

Remote Control and Trip

Configuration B can be used as the physical interface for controlling switchgear equipment.

Available control functions cover:

• One circuit breaker
• Disconnectors
• Earthing switch
• Equipment position indication

SMU615 does not decide when a protection trip should occur. A separate protection device makes the trip decision and can send the command to SMU615 through IEC 61850 GOOSE. SMU615 then operates the corresponding physical output.

This distinction is important when selecting the unit for a new project.

Optional Arc Detection

SMU615 can be ordered with three optical light-detection channels for arc-fault detection in metal-enclosed switchgear.

The sensors may be installed in areas such as:

• Circuit-breaker compartment
• Busbar compartment
• able compartment

SMU615 provides the arc-light information, while the actual protection and tripping decision is made by another protection device.

Applications

ABB SMU615 is commonly used for:

• Digital substations
• IEC 61850 process-bus projects
• Medium-voltage digital switchgear
• Centralised substation protection
• Feeder measurement interfaces
• Current and voltage signal digitisation
• Sensor-based switchgear
• Conventional CT/VT digitalisation
• Utility substations
• Industrial substations
• New MV switchgear projects
• Switchgear modernisation
• Substation automation projects
• Circuit-breaker control interfaces
• Disconnector control interfaces
• Earthing-switch control
• GOOSE-based trip interfaces
• Arc-light detection
• Protection system extensions
• Existing ABB SMU615 replacement requirements

ABB currently lists SMU615 specifically for connecting sensors and conventional instrument transformers to an IEC 61850-9-2 LE process bus and for providing the physical interface between primary switchgear and protection devices.

Industries Using ABB SMU615

SMU615 requirements commonly come from projects involving:

• Power utilities
• Distribution substations
• Power-generation plants
• Renewable-energy substations
• Steel plants
• Cement plants
• Oil and gas facilities
• Refineries
• Petrochemical plants
• Mining facilities
• Data centres
• Infrastructure projects
• Large industrial power-distribution systems
• Switchgear manufacturers
• EPC contractors

ABB SMU615 Replacement

For an existing ABB SMU615 replacement, the full order code should be checked before placing an order.

Different SMU615 units may have:

• Configuration A or B
• Conventional CT/VT inputs or sensor inputs
• Different sensor input modules
• Different auxiliary supply
• Different Ethernet interfaces
• Different binary I/O
• Arc-light detection option
• High-speed output option
• Different communication hardware

ABB’s current product page continues to list SMU615 as its dedicated substation merging unit, and ABB’s technical portal identifies the current documented product as SMU615 version 1.0.

For an exact replacement, send the existing SMU615 nameplate and complete order code rather than ordering only by the model number.

Information Required for ABB SMU615 Quotation

For most enquiries, please share:

• Complete ABB SMU615 order code
• Required quantity
• Destination country
• Required delivery schedule

For replacement requirements:

• Clear existing unit nameplate
• Configuration A or B, if known
• Existing PCM600 file, if available

Contact us for ABB SMU615 price in India, SMU615 Configuration A or B, ABB IEC 61850-9-2 LE merging unit, digital substation merging unit, matching replacement or international export quotation from India.