Published by Alex Roderick, EE Power – Technical Articles: Arc Flash and Overvoltage Protection, August 26, 2021. In addition to the risk of electrical shock, other hazards are present when work is performed on or near energized electrical equipment or conductors. Two serious hazards are electrical arc flashes and electrical arc blasts. An arc flash isContinue reading “Arc Flash and Overvoltage Protection”
Tag Archives: Safety/Protection
How to Improve Resistance to Ground
Published by Lorenzo Mari, EE Power – Technical Articles: How to Improve Resistance to Ground, September 25, 2020. Learn about the methods used to lower the resistance of a grounding electrode When the soil resistivity is high, and the resistance to ground exceeds the required values, specific techniques are useful to decrease it. This article evaluatesContinue reading “How to Improve Resistance to Ground”
System and Equipment Grounding Safety
Published by Alex Roderick, EE Power – Technical Articles: System and Equipment Grounding Safety, August 15, 2021. Grounding is used to provide a safe path for a fault current to flow. Grounding is an integral part of any properly operating electrical system. In residence, grounding protects the occupants by providing a safe pathway for unwanted electricityContinue reading “System and Equipment Grounding Safety”
Single-point and Multi-point Signal Grounding
Published by Lorenzo Mari, EE Power – Technical Articles: Single-point and multi-point Signal Grounding, April 16, 2021. A grounding arrangement must be designed and implemented adequately for the electronic equipment’s proper performance Introduction The main categories for grounding electronic equipment are: • Safety ground (AC and DC power ground) prevents shocks and fire hazards from theContinue reading “Single-point and Multi-point Signal Grounding”
Types of Surge Arresters
Published by Lorenzo Mari, EE Power – Technical Articles: Types of Surge Arresters, December 18, 2020. Learn about the most common types of surge arresters used to protect against transient overvoltages and lightning strikes. Surge arresters introduce shunting resistance to the ground when a surge appears, absorbing energy from the surge without the voltage becoming excessive.Continue reading “Types of Surge Arresters”
Substation Protection Against Transient Overvoltages and Lightning Strikes
Published by Lorenzo Mari, EE Power – Technical Articles: Substation Protection Against Transient Overvoltages and Lightning Strikes, December 11, 2020. Learn how surge arresters protect power substations against lightning and switching overvoltages. Transient overvoltages are typical of power systems. The sources of overvoltages are direct or nearby lightning strikes, switching operations, electromagnetic pulses, and electrostatic discharges.Continue reading “Substation Protection Against Transient Overvoltages and Lightning Strikes”
Faults and Defects in Power Transformers – A Case Study
Published by Cacilda de Jesus Ribeiro1; André Pereira Marques2,3; Cláudio Henrique Bezerra Azevedo2; Denise Cascão PoliSouza1; Bernardo Pinheiro Alvarenga1; Reinaldo Gonçalves Nogueira1 1School of Electrical and Computer Engineering, Federal University of Goiás, Goiânia, GO, Brazil,2CELG Distribuição, Goiânia, GO, Brazil,3Federal Institute of Education, Science and Technology of Goiás, Goiânia, GO, Brazil Abstract – Power transformers playContinue reading “Faults and Defects in Power Transformers – A Case Study”
Electrical Grounding and Bonding per NEC
Published by Joe Doughney and Lilly Vang, Consulting-Specifying Engineer, Electrical Articles: Electrical grounding and bonding per NEC, December 9, 2020. Understanding correct grounding and bonding design and construction is crucial for proper electrical system operation and personnel safety Learning Objectives • Learn the proper electrical grounding terminologies.• Understand National Electrical Code grounding and bonding requirementsContinue reading “Electrical Grounding and Bonding per NEC”
The Basics of Substation Grounding: Parts of the Grounding System
Published by Lorenzo Mari, EE Power – Technical Articles: The Basics of Substation Grounding: Parts of the Grounding System, October 02, 2020. Learn about the main parts of a substation grounding system One of the vital aspects of the protection of people and equipment in electrical substations is the provision of an adequate grounding system. TheContinue reading “The Basics of Substation Grounding: Parts of the Grounding System”
Ground Fault Protection Methods of a Generator Stator
Published by Ahmad Rizal SULTAN, Mohd Wazir bin MUSTAFA, Technology University of Malaysia, Faculty of Electrical Engineering Abstract. The type of generator grounding method and the system configuration determine the choice of ground fault protection. Ground fault generator stator can cause serious damage to the generator. Therefore, the total area of the generator stator windingsContinue reading “Ground Fault Protection Methods of a Generator Stator”
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