, which previously handled additional requirements for low-power instrument transformers. New Wideband Accuracy Classes : A major highlight is the introduction of optional wideband accuracy classes (WB0 to WB4). These are designed to measure harmonics up to

If you're interested in a specific aspect of IEC 61869-1 or need more detailed information, please let me know, and I'll do my best to provide it.

(Specific details for VTs)

If you're looking for a technical overview of IEC 61869-1 , the latest major update is the 2023 edition (2.0)

Explain the specific for insulation and partial discharge.

: Valid exclusively for equipment above 1 kV AC or 1.5 kV DC. Low-voltage (LV) systems are excluded and must follow IEC 61869-201 .

The search keyword highlights a massive spike in demand among electrical engineers, grid operators, and substation designers looking for the latest, definitive documentation on instrument transformers. The IEC 61869-1 standard serves as the global blueprint for newly manufactured instrument transformers, outlining general requirements for equipment deployed in high-voltage systems exceeding 1 kV AC or 1.5 kV DC.

It is available through national standards bodies like ANSI or ISO.

Defines standard ambient temperatures (usually -5°C to +40°C) and altitudes (up to 1000m) where the equipment must operate reliably.

Currently, several parts are generating significant attention in the industry. The new IEC 61869-20:2025 was just published and focuses specifically on safety. Part 9, dealing with digital interfaces (a key component of the smart grid/IEC 61850 ecosystem), is also under active development with an amendment for time synchronization. The revision of classic parts like -2, -3, and -5 is also in progress.

The International Electrotechnical Commission (IEC) structured the IEC 61869 series to replace older standards like IEC 60044.

Specific requirements for Combined Transformers (units that measure both current and voltage in one housing).

Defines the protection level of the device against environmental factors. Where to Find the IEC 61869-1 PDF Hot