Published by Alex Roderick, EE Power – Technical Articles: Electrical Shock and its Effects, August 17, 2021. Anyone working on electrical equipment should have respect for all voltages, have knowledge of the principles of electricity, and follow safe work procedures. An electrical shock occurs when a body becomes a part of an electrical circuit. The effectsContinue reading “Electrical Shock and its Effects”
Tag Archives: Safety/Protection
Method of Selecting the Most Important Power Lines in a Transmission and Distribution Network
Published by Dalibor VALEK, Radomir SCUREK, Technical University of Ostrava, Faculty of Safety Engineering Abstract: This article describes the method used to graph theory in security analysis. For the pursposes of this study, an environment is referred to here as a network of power lines and devices and a power grid is considered as aContinue reading “Method of Selecting the Most Important Power Lines in a Transmission and Distribution Network”
Overvoltage of Atmospheric Origin
Published by Electrical Installation Wiki, Chapter J. Overvoltage protection – Overvoltage of atmospheric origin Overvoltage definitions Overvoltage (in a system) any voltage between one phase conductor and earth or between phase conductors having a peak value exceeding the corresponding peak of the highest voltage for equipment. Definition from the International Electrotechnical Vocabulary (IEV 604-03-09); available on [1] VariousContinue reading “Overvoltage of Atmospheric Origin”
The Basics of Grounding Electrical Systems
Published by Lorenzo Mari, EE Power – Technical Articles: The Basics of Grounding Electrical Systems, April 10, 2020. This article breaks down the complexities found in the fundamental field of grounding for the correct, faultless operation of electrical systems. Grounding, or earthing, is a fundamental topic for the correct operation of electrical systems and devices. However,Continue reading “The Basics of Grounding Electrical Systems”
AC Equipment Grounding: Creating a Safe Fault Current Path to Ground
Published by Lorenzo Mari, EE Power – Technical Articles: AC Equipment Grounding: Creating a Safe Fault Current Path to Ground, August 07, 2020. Learn about the merits of the equipment grounding to protect people in faulted AC power systems. Electrical equipment casings should be at earth potential under normal conditions. When a fault occurs in anContinue reading “AC Equipment Grounding: Creating a Safe Fault Current Path to Ground”
Arc Flash and Overvoltage Protection
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”
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”
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