IEEE 62-1958 PDF Download

The IEEE Recommended Guide for Making Dielectric Measurements in the Field, published in 1958, aims to discuss the applicability and limitations of various measurement methods for testing the electrical insulation of power apparatus in the field. It focuses on considering the special conditions encountered during field testing and their impact on instruments, methods, and procedures for making tests on the electrical insulation of power apparatus.

The guide covers several general methods of test, including low-frequency, low- and high-voltage loss characteristic measurements, alternating-voltage corona measurements, and alternating-voltage distribution measurements. These measurements are used to determine quantities such as power factor, dissipation factor, capacitance, charging current, and potential of terminal electrodes, which define the electric circuit constants of the test specimen in the voltage range of approximately 80 volts to 50 kilovolts or higher.

The primary purpose of this guide is to present and discuss the different measurement methods available for testing electrical insulation and their limitations. It emphasizes that while factory tests assure the initial quality and condition, electrical apparatus can be influenced during shipment, installation, and operation, potentially affecting the insulation and shortening its useful life. Field testing at regular intervals is therefore recommended to determine the suitability for service and detect any deterioration that can be prevented or addressed through proper maintenance procedures.