IEC 61869-1:2023 is the latest "product family" standard governing the general requirements for instrument transformers. It serves as a foundational document that must be used in conjunction with specific product standards (like Part 2 for current transformers or Part 3 for voltage transformers). IEC Webstore Key Technical Updates (2023 Edition)

The 2023 edition (Ed. 2.0) introduced several significant technical changes over the original 2007 version: Standard Merger : It officially merges with and replaces IEC 61869-6:2016

, which formerly handled additional general requirements for low-power instrument transformers (LPIT). Revised Scope

: It now focuses on equipment for high-voltage (HV) applications with nominal voltages is greater than 1 is greater than 1.5

. Requirements for low-voltage (LV) systems are now covered under IEC 61869-201 Wideband Accuracy : A major highlight is the introduction of optional wideband frequency classes

(WB0 to WB4), extending accuracy requirements for harmonics up to Enhanced Testing

: The edition reclassifies certain special tests as type or routine tests and introduces a new clause for commissioning tests IEC Webstore Core Standard Features Error Limits

: Establishes precise limits for both analogue and digital secondary signals to ensure measurement accuracy. Digital Integration : Works with IEC 61869-9 IEC 61850 series

to standardize digital interfaces for power utility automation. Environmental & Safety

: Defines standards for ambient temperature, altitude, vibration, and internal arc fault protection. IEC Webstore Typical Applications Compliant transformers are essential in: HV Substations

: For accurate measurement in transmission and distribution networks. Power Plants : For metering and protection systems. Smart Grids

: Providing digital outputs compatible with automated control systems. iTeh Standards

The standard can be purchased through official platforms like the IEC Webstore or retailers such as

The current version of the standard is IEC 61869-1:2023, which was released in June 2023. This 2nd edition is a major technical revision that replaces both the original 2007 version and the specific requirements for low-power instrument transformers previously found in IEC 61869-6:2016. Key Updates in the 2023 Edition

Merger of Standards: It now incorporates the general requirements for low-power instrument transformers (LPIT) from the now-cancelled IEC 61869-6.

Updated Scope: The standard specifically applies to newly manufactured instrument transformers for high-voltage (HV) applications with nominal voltages greater than 1 kV AC or 1.5 kV DC.

Enhanced Testing: Includes new classifications for special tests, additional type and special tests, and a dedicated new clause for commissioning tests.

Digital Accuracy: New requirements cover limits of error for both analogue and digital secondary signals.

Wideband Classes: Introduces optional wideband accuracy classes (e.g., WB2) for inductive current transformers to handle frequencies up to 20 kHz. Proposed Social Media Post

Headline: The New Blueprint for HV Instrument Transformers is Here! ⚡

The electrical industry just got a major upgrade. The latest IEC 61869-1:2023 standard is now the definitive guide for high-voltage instrument transformers, replacing the outdated 2007 edition.

What’s changing?✅ One Standard to Rule Them All: It now absorbs LPIT requirements (formerly IEC 61869-6).✅ Digital Ready: Comprehensive error limits for both analogue AND digital secondary signals.✅ Sharper Testing: New clauses for commissioning and expanded type tests ensure higher reliability.✅ Future-Proofing: Introduction of wideband accuracy classes for harmonic frequencies up to 20 kHz.

Whether you're in design, testing, or utility management, this is the foundational document for anything >1 kV.

🔗 Stay compliant and download the latest version from the IEC Webstore or your local standards body like BSI.

#ElectricalEngineering #PowerSystems #IECStandards #SmartGrid #EnergyInfrastructure IEC 61869-1:2023

The IEC 61869-1 standard provides the general requirements for instrument transformers, such as current and voltage transformers. The most recent version, IEC 61869-1:2023, replaces the 2007 edition and incorporates requirements from IEC 61869-6:2016.

Below is a structured "paper" or summary based on the key components of this standard:

IEC 61869-1: General Requirements for Instrument Transformers

1. Scope and ApplicationThis standard applies to newly manufactured instrument transformers (analogue or digital output) intended for high-voltage applications where nominal voltage exceeds

. It serves as a Product Family standard, meaning it must be used alongside specific parts (e.g., Part 2 for Current Transformers). 2. Key Technical Classifications Standard Frequency Range: Covers rated frequencies from

New Accuracy Classes: The 2023 edition introduces optional wideband accuracy classes (like WB1) to evaluate how transformers handle distorted current harmonics.

Environmental Conditions: Defines standard service conditions for temperature, altitude, and vibration.

3. Testing CategoriesThe standard divides testing into several critical categories to ensure safety and reliability:

Type Tests: Verifies the design and is performed once on a representative unit (e.g., temperature-rise tests, impulse voltage tests).

Routine Tests: Performed on every individual transformer (e.g., power-frequency voltage withstand tests).

Special Tests: Agreed upon between the manufacturer and purchaser (e.g., corrosion tests).

Commissioning Tests: New to the 2023 edition, these ensure the unit is correctly installed and functional on-site. 4. Major Technical Changes (2023 Edition)

Merger: Integrates general requirements for Low Power Instrument Transformers (previously in Part 6). DC Applications: Expanded scope to include DC systems up to

New Annexes: Includes Annexes E, F, G, and I, which provide updated guidance on technical specifications and testing procedures. Reference Links IEC 61869-1:2023 Official Publication Preview of IEC 61869-1:2023 (iTeh Standards) Evaluation of Wideband Accuracy Paper (ResearchGate)

IEC 61869-1:2023 is the latest international product-family standard providing general requirements for newly manufactured instrument transformers. It serves as the foundational document for a comprehensive set of standards replacing the older IEC 60044 series.

The current version, IEC 61869-1:2023, replaces the 2007 edition and IEC 61869-6:2016. It is critical for modern power systems as it introduces advanced requirements for digital interfaces, wideband accuracy for harmonics, and high-voltage (HV) applications above 1 kV AC or 1.5 kV DC. Key Scope and Applicability

Voltage Range: Intended for HV applications (>1 kV AC or >1.5 kV DC); low-voltage systems are covered by IEC 61869-201.

Frequency Range: Applicable to rated frequencies from 15 Hz to 400 Hz and DC applications.

Outputs: Covers instrument transformers with both analogue and digital secondary signals used for measurement, protection, and control. Technical Changes in the 2023 Revision

The 2023 edition constitutes a major technical revision with several significant updates:

Instrument transformers according to new IEC standards ... - ABB

IEC 61869-1 is the foundational international standard for instrument transformers, serving as a "Product Family" document that provides general requirements for devices used in measurement, protection, and control applications. The current active version is IEC 61869-1:2023, which replaced the original 2007 edition and merged with IEC 61869-6:2016 to consolidate general requirements for both traditional and low-power instrument transformers. Core Scope and Application

Voltage Range: Specifically applicable to newly manufactured instrument transformers for high-voltage (HV) applications where nominal voltage is greater than 1 kV AC or 1.5 kV DC.

Low Voltage (LV): Applications at or below 1 kV AC / 1.5 kV DC are covered under a separate standard, IEC 61869-201.

Frequency: Supports rated frequencies from 15 Hz up to 400 Hz, as well as DC applications.

Output Types: Covers transformers with both analogue and digital secondary signals. Key Technical Features

The standard establishes essential performance and safety benchmarks including: IEC 61869-1:2023

Just to clarify:

Part 3: The "Red Hot" Amendments (2023–2025)

Why is the old PDF not good enough? Because the IEC has released several new amendments.

If you are searching for a "hot" PDF, you specifically want Edition 2.0 or later. Do not settle for scanned copies of the 2011 edition.

2. The Shift to Digital Substations (IEC 61850)

The old analog ITs (0-5A / 110V) are fading. IEC 61869-9 defines how to merge digital signals. If you are working on a modernization project, you need the "hot off the press" updates to IEC 61869-9 dealing with merging units and signal latency.

1. The Shift from IEC 60044

IEC 61869 is gradually replacing the old IEC 60044 series for instrument transformers (Voltage Transformers, Current Transformors, and LPITs). If you’re designing a new substation or retrofitting digital relays, you must comply with the new standard. The industry is in a transition phase, and everyone is scrambling to update their specs.

Why the Shift from IEC 60044?

Before the 61869 series, the industry relied on the IEC 60044 standards (e.g., IEC 60044-6 for CTs). So, why the change?

The older standards were developed primarily for conventional electromagnetic transformers. However, modern grids now utilize Electronic Instrument Transformers (EITs) and digital communication protocols. IEC 60044 was fragmented and struggled to cover these new technologies uniformly.

IEC 61869 was introduced to create a unified framework that applies to:

  1. Conventional (inductive) transformers.
  2. Electronic (digital/optical) transformers.

IEC 61869-1 acts as the "constitution" for this new series, ensuring that whether you are using a legacy oil-paper CT or a modern optical sensor, the core definitions and safety criteria remain consistent.