IEC 61850-7-4-2020 PDF

Full title and description

Communication networks and systems for power utility automation – Part 7‑4: Basic communication structure – Compatible logical node classes and data object classes (IEC 61850‑7‑4, consolidated 2010 + Amendment 1:2020). This publication defines the standardized logical node (LN) classes, data object classes and related naming/semantics used for information exchange between intelligent electronic devices (IEDs) in power utility and substation automation systems.

Abstract

This item is Amendment 1 (2020) to IEC 61850‑7‑4 (Edition 2), provided as a consolidated publication that updates and extends the data-model elements used across the IEC 61850 family. Key changes include clarifications and corrections to existing LN and data object definitions, additions for power quality and statistical/historical data, introduction of abstract logical nodes to improve object‑oriented structure, and alignment/extensions with related parts (for example 7‑410, 7‑420 and work referenced in IEC 61850‑90‑1). The amendment is intended to improve consistency, interoperability and machine‑readability (NSD/Code Components) of IEC 61850 data models.

General information

• Status: Published / Current consolidated publication.
• Publication date: 12 February 2020 (Amendment 1 published; consolidated edition available 2020).
• Publisher: International Electrotechnical Commission (IEC).
• ICS / categories: 33.200 (Telecontrol, telemetering).
• Edition / version: Original Edition 2 (2010) amended by A1:2020 → consolidated Edition 2.1 (commonly referenced as IEC 61850‑7‑4:2010+A1:2020).
• Number of pages: 898 pages (consolidated bilingual PDF/printed publication counts).

Scope

Specifies the information model for devices and functions commonly used in power utility automation and substations: standardized logical node names, data object names and their structure/semantics to enable consistent communication between IEDs. The amendment extends the LN lists (notably for power quality and monitoring), adds object model refinements for statistical and historical data, and provides machine‑readable code components derived from the common UML model to support tooling and interoperability.

Key topics and requirements

• Harmonized Logical Node (LN) classes and Data Object classes with clarified naming and semantics to ensure identical concepts use identical identifiers across applications.
• Introduction and specification of abstract logical nodes to form a clearer object‑oriented LN hierarchy and improve reuse.
• Extensions for power quality monitoring and new LNs relevant to power quality measurement and reporting.
• Enhancements for statistical and historical statistical data models and related attributes.
• Alignment and interoperability considerations with related IEC 61850 parts (for example 7‑410, 7‑420, 90‑1) and references to test/measurement standards where appropriate.

Typical use and users

Used by utility engineers, substation automation designers, relay and IED manufacturers, system integrators, test laboratories and software/tooling vendors that implement, configure or validate IEC 61850 data models and SCL‑based engineering. The document is applied when specifying device information models, performing engineering and interoperability testing, and implementing data model support in IED firmware and utility SCADA/DER/automation systems.

Related standards

Part of the IEC 61850 series; closely related to other parts that define services, mappings and additional LN sets such as IEC 61850‑7‑2, IEC 61850‑7‑3, IEC 61850‑7‑410, IEC 61850‑7‑420, IEC 61850‑8‑1, IEC 61850‑9‑3 and application/profile work in IEC 61850‑90‑1. The amendment also references related device and measurement standards (for example IEC 62271 and IEEE/IEC synchrophasor measurement standards) where new LNs support monitoring or compliance requirements.

Keywords

IEC 61850, logical node (LN), data object class, IED, substation automation, SCL, data model, power quality, statistical data, NSD, interoperability.

FAQ

Q: What is this standard?

A: It is Part 7‑4 of the IEC 61850 series, specifying compatible logical node classes and data object classes used for data modelling in power utility and substation automation systems (consolidated with Amendment 1:2020).

Q: What does it cover?

A: It defines names, semantics and structure of logical nodes and data objects, including new and revised LNs for power quality, statistical/historical data and abstract LN constructs to improve model consistency and tool support.

Q: Who typically uses it?

A: Utilities, protection and control equipment manufacturers, system integrators, testing labs and software/tool providers implementing IEC 61850 data models and engineering workflows.

Q: Is it current or superseded?

A: The amendment (A1:2020) was published on 12 Feb 2020 and is provided as a consolidated edition; the consolidated publication is the current published form (stability/maintenance dates indicated by IEC; consult IEC for any later revisions after 2020).

Q: Is it part of a series?

A: Yes — it is one part of the IEC 61850 family (communication networks and systems for power utility automation). Other parts define services, mappings, additional LNs, profiles and implementation guidance.

Q: What are the key keywords?

A: Logical node, data object, IED, SCL, data model, interoperability, power quality, NSD.