Active standard | Published: 15/12/2025

IEC/IEEE 61869-21-ed.1.0

Instrument transformers - Part 21: Uncertainty evaluation in the accuracy test of instrument transformers

Available languages: English

Available design: electronic design (pdf), Print design, CD-ROM

from 386.90 USD show on eshop

Detail information

Designation: IEC/IEEE 61869-21-ed.1.0

Publication date: 15/12/2025

Pages: 40

Country: International technical standard

Where to buy?

You can buy at www.mystandards.biz

Anotation

IEC/IEEE 61869-21:2025 provides the requirements, the methods and the guidelines to be applied on the evaluation of uncertainty in testing the accuracy of instrument transformers (IT) with an analogue or a digital secondary signal for measuring, protection and control purposes, with rated frequencies from 15 Hz to 400 Hz. This document covers the uncertainty evaluation in testing the accuracy of IT (including on-site testing of accuracy) independently of the technology used (either inductive or non-inductive). This document reports on how to take into account the sources of uncertainty in the setups for accuracy and how to combine their effects in order to evaluate the uncertainty in the test results.

Popular Publishers

full catalog