The ASTM Committee has purview over all protective electrical equipment, including arc flash suits, arc-rated clothing, rubber insulated gloves, insulated tools, and grounds. They do not specify how they are to be used, but specify how they are to be designed, tested, cleaned, and cared for. The meeting was held in Orlando, Florida, on October 8–9, 2018, which sounds nice, …
Insulated Conductor Committee News
The Insulated Conductor Committee’s groups, which include engineers and scientists, met in Orlando, Florida, for the fall 2018 IEEE/ICC meeting from October 29–31, 2018. The Insulated Conductors Committee (ICC) is a professional organization within the Power Engineering Society (PES) of the Institute of Electrical and Electronics Engineers (IEEE). This is an ongoing opportunity for the InterNational Electrical Testing Association to …
PowerTest 2019 – New Product Form
AEMC Instruments www.aemc.com AEMC’s New Line of Simple-to-Use Data Loggers AEMC Instruments has just introduced a new, low-cost line of simple-to-use data loggers. These small, compact data loggers measure just 3 inches by 3/4 inches. The 10 models in the family measure dc volts, ac volts, dc current, pulse, event, and temperature (model dependent). Inputs to each unit are facilitated …
IEEE Transformers Committee Report
Several of the subcommittees under the IEEE Transformers Committee are doing significant work. This report covers work in the last two quarters of 2018. Insulating Fluids Subcommittee C57.104, IEEE Guide for the Interpretation of Gases Generated in Oil-Immersed Transformers (DGA) is being revised and will change how DGA results will be interpreted. It went out to the working group for …
Practice Theory: High-Voltage Laboratory Testing of New Electrical Products
High voltage is defined by the National Electrical Code (NEC) as any voltage over 600V and by the International Electrotechnical Commission (IEC) as any voltage greater than or equal to 1,000V. NETA uses the IEEE definition: any voltage greater than or equal to 100kV and less than or equal to 230kV. Other standards and industries define high voltage at different …
Group CBS: Evolve and Change—or Decay
NETA Corporate Alliance Partners (CAPs) are industry-leading companies that have joined forces with NETA to work together toward a common goal: improving quality, safety, and electrical system reliability. The new NETA World spotlight series looks at what makes CAPs special and highlights some of their successes. This issue features an interview with Bill Schofield, President of Advanced Electrical and Motor …
The Value of Performing Power Factor Sweep Measurements on Bushings
Power factor measurement has long been accepted as an invaluable tool for identifying insulation defects such as aging, deterioration, moisture ingress, and localized failures involving the winding and bushing insulation of a power transformer. Historically, power factor measurements have been performed at a single test frequency (typically 60Hz) and at a single test voltage (typically 10kV). However, modern test instruments …
High-Power Batteries as Power Source with Dynamic Resistance Measurement and Both Sides Grounded
Electrical arc phenomena have been studied for a long time. It is an inevitable process that occurs during interruption of high electrical currents (e.g., during a short circuit current interruption). The effects of the electrical arc on the circuit breaker contacts are known, and great attention has been paid to developing methods to analyze arc behavior and minimize damage to …
Dynamic Testing of Numerical Protection Relays
A numerical protection relay provides multiple functions and typically uses algorithms that do not work on the same principles as older electromechanical relays. Numerical relays are often still tested using old techniques developed long ago for electromechanical relays. One such common technique is referred to as a “static test.” Fault voltage and/or fault current are injected to see whether the …
Measuring Humidity: Why It’s Important
Most people are all too aware of the effects humidity can have on human comfort and health, especially when combined with high temperatures. Perhaps less well known is how humidity can impact electrical systems. For example, high humidity can cause droplets of water to condense on circuits, producing problems such as shorting and corrosion. Many geographic regions are prone to …