Steel Plant Transformer Operational Issues

Published by Tadeusz GLINKA1,2, Marek GLINKA2Politechnika Śląska w Gliwicach (1), BOBRME Komel (2) Abstract. Design of steel-plant furnace three-phase transformer (110 kV/(350 to 500) V, 50 kA) and its operating conditions are described in the paper. After three months of operation this transformer failed. Cause of failure, its course and damage to transformer winding areContinue reading “Steel Plant Transformer Operational Issues”

The Effect of PWM Frequency on the Effectiveness of Protection Against Electric Shock using Residual Current Devices

Published by Stanisław CZAPP , Gdańsk University of Technology, Faculty of Electrical and Control Engineering Abstract. In the paper spectral analysis of the distorted earth fault currents in circuits with variable speed drives is performed. Effectiveness of protection against electric shock using residual current devices in circuits with variable speed drives for various PWM frequenciesContinue reading “The Effect of PWM Frequency on the Effectiveness of Protection Against Electric Shock using Residual Current Devices”

Using Portable/Emergency Generators Safely

Published by U.S. Department of Energy (DOE), Office of Cybersecurity, Energy Security, and Emergency Response, Website: energy.gov Power outages are common during disasters, and they can last for several days. You can reduce your losses and speed the recovery process with an emergency generator. Portable generators made for household use can provide temporary power to a fewContinue reading “Using Portable/Emergency Generators Safely”

In Case of a Power Outage

Published by Silicon Valley Power® (SVP), City of Santa Clara, California, USA. Power outages are inconvenient for everyone, and we at Silicon Valley Power (SVP) do everything we can to reliably maintain your power. When we do have an outage, SVP is dedicated to resolving the problem as quickly as possible. We take pride inContinue reading “In Case of a Power Outage”

What is Portable Appliance Testing and Why is PAT Test Done

Published by Carelabs, Carelabs is authorized provider of Electrical Installation’s Study, Analysis, Inspection, and Certification services in UAE. Website: carelabz.com Portable appliance testing (commonly known as “PAT”, “PAT Inspection” or (redundantly) as “PAT Testing) is the term used to describe the examination of electrical appliances and equipment to ensure they are safe to use. The formal term for the processContinue reading “What is Portable Appliance Testing and Why is PAT Test Done”

What is Protective Device Testing and How is it Done

Published by Carelabs (Carelabz), Website: carelabz.com Equipment applied to electric power systems to detect abnormal and intolerable conditions and to initiate appropriate corrective actions. These devices include lightning arresters, surge protectors, fuses, and relays with associated circuit breakers, reclosers, and so forth. From time to time, disturbances in the normal operation of a power system occur.Continue reading “What is Protective Device Testing and How is it Done”

What is Circuit Breaker Testing and How is it Done

Published by Carelabs (Carelabz), Website: carelabz.com Circuit Breaker Testing is utilised to test the operation of each switching systems and the programming of the entire tripping structure. Circuit Breaker Testing is essential to ensure the safe and reliable performance of this key link in the power asset chain. Circuit breakers perform three main tasks: They should conductContinue reading “What is Circuit Breaker Testing and How is it Done”

Hot Stuff! Power Monitoring on Live Circuits Can Be Done Safely

Published by Michael Daish, Summit Technology, Inc, Walnut Creek, CA Introduction Our modern technological world depends on systems and processes that require 24 x 7 x 365 operation. When their electrical infrastructures need maintenance it must inevitably be performed on live circuits. This article discusses a procedure to keep workers safe when performing “hot work”.Continue reading “Hot Stuff! Power Monitoring on Live Circuits Can Be Done Safely”

Learn About Residual Current Device Testing and Safety

Published by Carelabs (Carelabz), Website: carelabz.com Residual Current Device offer a level of personal protection that ordinary fuses and circuit-breakers cannot provide. Residual Current Devices, or RCDs. are safety switches that prevent people from getting electrocuted in homes and businesses. The device monitors the flow of electricity as it enters a property from the main distribution panel. A surge ofContinue reading “Learn About Residual Current Device Testing and Safety”

Why is Electrical Infrared Thermography Inspection Important?

Published by Carelabs (Carelabz), Website: carelabz.com Infrared Scanning of electrical installations falls under classification of Predictive Maintenance Fault Finding. The value is that we are now able to predict an electrical fault before the element fails completely. We are able to get this due to the heat build-up of any electrical element under stress and predict thatContinue reading “Why is Electrical Infrared Thermography Inspection Important?”