Material selection guidelines to minimize the risk of fire propagation. 6. Digital and Modern Substation Integration
The standard classifies pollution levels (light, medium, heavy, very heavy) to dictate minimal creepage distances for outdoor insulators. 2. Ratings and Electrical Characteristics
The 2023 edition is a major update, merging the previous IEC 61869-1:2007 (General Requirements) and IEC 61869-6:2016 (Low-power Instrument Transformers) into one unified document.
The new version, adopted as EN IEC 61869-1:2024 , defines the rules for newly manufactured transformers:
Additional requirements for combined transformers. iec 618691 pdf
Power-frequency voltage withstand tests on primary and secondary windings.
Standard ratings apply up to 1,000 meters above sea level. For installations higher than 1,000m, dielectric properties must be adjusted due to thinning air.
The standard mandates specific design criteria to ensure safety during operation:
Testing verifies compliance with safety and accuracy requirements. IEC 61869-1 categorizes tests into three distinct types: Type Tests Material selection guidelines to minimize the risk of
Checks the durability of external coatings and enclosures in harsh environments. Why the Shift from IEC 60044 to IEC 61869?
Understanding IEC 61869-1 PDF: The Essential General Requirements for Instrument Transformers
: The scope now specifically covers equipment for High Voltage (HV) applications with nominal voltages above
Details the tests for insulation levels, including lightning impulses, switching impulses, and power-frequency voltage withstand tests. 4. Accuracy Requirements " and new annexes (E
IEC 61869-1 is the cornerstone standard for instrument transformer technology. By establishing a unified vocabulary and rigorous testing protocols, it ensures that the devices used to meter electricity and protect the grid are safe, reliable, and accurate, regardless of the manufacturer.
Unlike traditional serial protocols (such as DNP3 or Modbus) that relied on rigid, vendor-specific data mapping and extensive hardwiring, IEC 61850 adopts an . It defines how all IEDs within a substation—protection relays, bay controllers, merging units, and intelligent switchgear—exchange critical data over a standard IP network.
Defines acceptable levels of seismic activity and ambient pollution (e.g., coastal salt or industrial dust) the housing must withstand. 2. Insulation and Dielectric Requirements
: Some "special tests" have been reclassified as "type tests" or "routine tests," and new annexes (E, F, G, and I) have been added to provide deeper technical guidance. Core Technical Focus Areas
The standard specifically targets equipment intended for applications where the nominal voltage is . It covers a wide range of operational parameters: