IEC 61850-7-3:2010

Overview

IEC 61850-7-3:2010 - part of the IEC 61850 family - defines the Basic Communication Structure: Common Data Classes (CDCs) for power utility automation. It specifies constructed attribute classes and a comprehensive set of common data classes used to describe device models and functions of substations and feeder equipment. The second edition (consolidated to 2020) adds CDCs for new object models and for representing statistical and historical data, making this publication central to modern substation automation and Smart Grid implementations.

Key topics and technical requirements

• Constructed attribute classes: standard building blocks for attributes (e.g., units, vectors, configuration objects) used across device models.
• Common Data Classes (CDCs): formal definitions for data types used in substations, including:
  • Status information (e.g., SPS, DPS, enumerated and statistical status classes)
  • Measured information (e.g., MV, CMV, SAV, harmonic and sequence data)
  • Controls (controllable single/double points, analogue controls)
  • Status settings and analogue settings (setpoints, curves, configuration tables)
  • Description and nameplate information
• Attribute types and enumerations: standard enumerated types (units, control models, periods, severity, etc.) to ensure semantic interoperability.
• Service tracking and functional constraints: CDCs for monitoring reporting services (GOOSE, reports, logs) and annexes describing functional constraints and compatibility rules.
• Configuration and compatibility: SCL enumerations, revision tracking, and guidance for backward/forward compatibility between revisions.

Practical applications

• Modeling of substation devices, logical nodes and data objects in Substation Configuration Language (SCL).
• Defining interoperable measurement and control points for protection, metering, and SCADA interfaces.
• Enabling vendor-neutral data exchange across devices from relays, bay controllers, RTUs, and IEC 61850-enabled sensors.
• Supporting Smart Grid features such as historical/statistical reporting, advanced metering, and cross-domain object models.

Who uses this standard

• Utility engineers and system architects designing substation automation and Smart Grid solutions.
• Device manufacturers and firmware developers implementing IEC 61850 models.
• System integrators and consultants responsible for SCL configuration, testing and interoperability.
• Standards bodies and project teams extending IEC 61850 to other domains.

Related standards

• IEC 61850 (overall series) - device modelling, communication services, mapping and configuration (other parts such as communication services, SCL, mappings to MMS/GOOSE/SMV).
• Useful for projects requiring compliance with IEC 61850 for substation automation and Smart Grid interoperability.

Keywords: IEC 61850-7-3:2010, common data classes, substation automation, power utility automation, Smart Grid, device model, SCL, measurand, protection, control.