SR EN IEC 60270:2025

IEC 60270:2025 is applicable to the charge-based measurement of partial discharges which occur in electrical apparatus, components or systems when tested with alternating voltages (AC) up to 500 Hz or with direct voltage (DC). This document: – defines the terms used; – defines the quantities to be measured; – describes the measurement frequencies as well as the test and measuring circuits which may be used; – defines analogue and digital measuring methods required for common applications; – specifies methods for calibration and requirements of instruments used for calibration; – gives guidance on test procedures; – gives some assistance concerning the discrimination of partial discharges from external interference. The provisions of this document are used in the drafting of specifications relating to partial discharge measurements for specific power apparatus. It deals with electrical measurements of impulsive (short-duration) partial discharges, but reference is also made to non-electrical methods primarily used for partial discharge location (see Annex F). Diagnosis of the