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- Insulation tests - Perform, interpret, and evaluate insulation tests including resistance, dielectric absorption, polarization index, tip-up, and applied voltage withstand.
- Important Standards
- IEEE 43 Recommended Practice for Testing Insulation Resistance of Rotating Machinery
- Essential Reading
- A Stitch in Time: The Complete Guide to Electrical Insulation Testing Gain a solid understanding of electrical insulation and how to evaluate its condition.
- Guide to insulation testing above 1kV Diagnostic insulation testing at voltages above 1 kV is an area that is less familiar to many electrical maintenance personnel. This book expands on the concepts found in the complete guide to insulation testing.
- The Basics of Insulation Testing Much like a leak in a water pipe, an imperfection in the insulation of a wire allows a steady flow of electricity to escape. This can be a detriment to electrical circuits and machinery.
- Insulation Resistance Test Methods Explained There are three different tests that can be performed with the Megohmeter. A strong understanding of these common test methods is an important tool in gaining the ability to determine the condition and quality of electrical insulation.
- Fluctuating Insulation Testing Readings: What is the actual measurement? If you aren’t experienced with insulation testing, you may become extremely frustrated when you are performing a test and the readings keep changing.
- Corona Imaging - See the Invisible Until recent technology breakthroughs, ultrasonic detection was one of the only methods capable for detecting corona.
- Important Standards
- Thermographic survey - Have the ability to perform, interpret, and evaluate a thermographic survey on electrical distribution systems. Interpret results in order to evaluate the condition of the equipment surveyed.
- Infrared Thermography for Electrical Distribution Systems This guide provides a basic overview of the theory and procedures involved with infrared scanning electrical distribution systems.
- Defining the Elements for Successful Infrared Thermography To ensure optimum results, a thermographer needs to understand the nature and reason for the inspection, all equipment and operator limitations, site conditions, and the proper documentation of findings.
- Infrared Inspections and Applications The infrared survey is a great initial screening or detection tool for potential problems, but additional electrical tests should be performed in order to confirm initial conclusions.
- The No-Outage Testing Matrix This article is aimed at helping target the best no-outage testing methods for various types of electrical equipment through the use of a simple matrix.
- Infrared Inspection Data: What's hot and what's not? Learn about standard methodologies for conducting the infrared inspections.
- Introduction to Infrared Thermography Infrared thermography is a proactive troubleshooting and predictive maintenance tool. In the hands of a thermographer an infrared camera can be used to make the world that is invisible to the human eye come to life
- Ratio and relative polarity - Correctly apply voltage or current to one set of windings and measure the output of associated windings to determine ratio, polarity, and/or phase relationship. Evaluate test results.
- Important IEEE Standards
- IEEE Standard 81 Guide for Measuring Earth Resistivity, Ground Impedance, and Earth Surface Potentials of a Ground System Part I: Normal Measurements
- IEEE C57.13.1 Guide for Field Testing of Relaying Current Transformers
- Ratio and Polarity
- ETT Level 3: Transformers Review documents related to testing ratio and polarity
- Important IEEE Standards
- Power-factor/dissipation-factor testing - Perform, interpret, and evaluate standard insulation power-factor/dissipation-factor tests on electrical power equipment, including transformers, breakers, cables, bushings, rotating equipment, and insulating liquids.
- Power Factor Application Guide An in-depth reference manual application guide for the Delta 4000 12 kV system, detailing its operation and the best methods for making capacitance and dissipation factor/power factor measurements.
- 3 Basic Modes of Power Factor Testing Power factor tests are used to measure dielectric losses, which relate to the wetness, dryness or deterioration of electrical insulation.
- The Value of Power Factor Testing Insulation power factor tests are used to measure dielectric losses, which relate the wetness, dryness or deterioration of transformer insulation. Both factory and field testing are performed to verify the insulation integrity of substation transformers.
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