scholarly journals Fatal electrical accidents in Finland 1980–2019 – trends and reducing measures

2020 ◽  
Vol 4 (2) ◽  
pp. 37-47
Author(s):  
Vesa Linja-aho
Keyword(s):  
Electric Shock ◽  
Death Rate ◽  
Power Line ◽  
Residual Current ◽  
Male Child ◽  
Electrical Safety ◽  
The Public ◽  
Overhead Power Line ◽  
Current Device

This paper analyses the content of fatal electrical accident records (n=157) in Finland during the years 1980–2019 in order to identify and classify accident types and causes. During the 40-year period, the death rate from electrical accidents has decreased from 0.29 per 100,000 people per year to 0.00-0.07 in the last decade. The number of accidents rooting from accidentally touching live parts and by making illegal electrical installations has plummeted. Of all fatalities, 37% could probably have been prevented if the circuit had been protected with a residual current device, which is now mandatory in new installations. The most common electrical accident in 2010–2019 was an electric shock from a railway overhead power line. Of fatal electrical accidents, 76% occur between April and September and 92.5% of victims are male. Child casualties are very rare. The level of electrical safety can be considered acceptable, but educating the public still has room for improvement.

Use of Protective Grounding to Assure Electric Safety of Work under Induced Voltage Conditions

Vestnik MEI ◽  
2021 ◽  
pp. 59-66
Author(s):  
Andrey V. Gorshkov ◽  
◽  
Ilya V. Korolev ◽  
Olga S. Shcherbacheva ◽  
◽  
...  
Keyword(s):  
Power Line ◽  
Electrical Safety ◽  
Overhead Line ◽  
Induced Voltage ◽  
Voltage Level ◽  
Regulatory Documents ◽  
Grounding Electrode ◽  
Safe Performance ◽  
Analytical Expressions ◽  
Overhead Power Line

Methods for safely performing works on a disconnected overhead power line under induced voltage conditions in compliance with the regulatory documentation requirements are considered. According to the "Rules for Labor Protection in Operation of Electrical Installations", work under induced voltage can be performed in one of two ways: grounding the overhead line at both ends and at the workplace (using the potential equalization technology or "without de-energization" for doing work) and with the overhead power line grounded only at the workplace. It is believed that by applying these methods the voltage induced on the disconnected line can be reduced to a safe value of 25 V. It is shown that the methods for safe performance of work on a disconnected overhead line stipulated by the regulatory documents ensure a relatively low reliability of repair personnel protection against being injured by induced voltage, in view of the influence of the human factor on the electrical safety. It is proposed to enhance the safety of work on a disconnected overhead power line by applying protective grounding through the use of a grounding electrode at the workplace with resistance sufficiently low for reducing the induced voltage to acceptable values. Analytical expressions have been obtained, using which it is possible, based on the results of induced voltage measurements, to determine the required value of the workplace grounding resistance and the level to which the induced voltage level is reduced as a result of grounding the overhead power line wires at the workplace. Proposals have also been developed on introducing amendments in the regulatory documents aimed to ensure more reliable protection of repair personnel against being injured by induced voltage.

Calculating the Capacitive Current Flowing Off from an Overhead Power Line Energized with the Voltage Induced by the Influencing Overhead Line Located at Different Distances from the Former

Vestnik MEI ◽  
2018 ◽  
Vol 3 (3) ◽  
pp. 37-43
Author(s):  
Ilya V. Korolev ◽  
◽  
Olga S. Shcherbacheva ◽  
Victor T. Medvedev ◽  
Dmitriy A. Burdyukov ◽  
...  
Keyword(s):  
Power Line ◽  
Overhead Line ◽  
Capacitive Current ◽  
Overhead Power Line

Study on the Residual Current Protection Device Technology

2014 ◽  
Vol 8 (1) ◽  
pp. 404-411 ◽  
Author(s):  
Guo Rongyan ◽  
Zhang Honghui
Keyword(s):  
Distribution System ◽  
Low Voltage ◽  
Residual Current ◽  
Electrical Safety ◽  
Protective Device ◽  
Protection Device ◽  
Voltage Distribution ◽  
The People ◽  
Safety Protection ◽  
Device Technology

As an important electrical safety protection device in low voltage distribution system, residual current protection device is to protect the insulation line leakage fault; the electric shock of the people plays an important role in fault. From the protection characteristics of residual current protective device to points, those can be divided into, residual current protection device for residual pulsating direct current and residual dc, according to the residual sinusoidal alternating current.

Comparison of electromagnetic fields emitted by typical overhead power line towers

2020 ◽  
Author(s):  
Jozef Bendík ◽  
Matej Cenký ◽  
Žaneta Eleschová ◽  
Anton Beláň ◽  
Boris Cintula ◽  
...  
Keyword(s):  
Electromagnetic Fields ◽  
Power Line ◽  
Overhead Power Line
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