Verification Regulation of Instrument Transformers—Part 2:Standard Voltage Transformers

This document establishes the fundamental metrological requirements and verification procedures for standard voltage transformers utilized in measurement systems. The regulations outline the necessary technical specifications to ensure accuracy and reliability across the specified range of electrical parameters. It details the methods for conducting primary verification, including the assessment of error limits, insulation resistance, and dielectric strength under defined environmental conditions. The text provides step-by-step guidance for the calibration process, covering equipment setup, data acquisition protocols, and the calculation of measurement uncertainties. It also addresses the criteria for determining conformity, specifying how test results should be documented and evaluated against established thresholds. The procedures described herein are designed to maintain the integrity of electrical measurement chains by ensuring that reference devices meet rigorous performance standards. Furthermore, it includes provisions for the maintenance of calibration records and the periodic re-verification schedule required to sustain operational validity. The guidelines aim to facilitate consistent practices in laboratory environments and industrial applications, supporting the broader objectives of traceability and quality assurance in electrical metrology.