Navegando por Assunto "Aterramento"

Agora exibindo 1 - 2 de 2

Acesso aberto (Open Access)
Avaliação de não conformidades em aterramento em máquinas e equipamentos elétricos móveis em canteiro de obras
(Universidade Federal do Pará, 2021-09-21) CANTANHEDE, Marco Aurélio Silva; MAGNO, Rui Nelson Otoni; http://lattes.cnpq.br/9017163598972975
Forecast the use of grounding that does not comply with regulatory standards, such as protection in machinery and mobile equipment on construction sites, in this work an assessment was carried out to analyze the possible risks and dangers, when using grounding in non-compliance with the standards. The visits were carried out in order to check the conditions of the cables and accessories that make up the grounding set, check the conditions and present a grounding model within the standards that meets the standards, which was based on field and preparation of the environment. Among its characteristics and objectives, it is observed that every grounding used needs to be redone, as it was seen that only an electrode bar that does not comply with current standards is used, such as grounding, protection for people, machines and mobile equipment. The work can be completed by contributing, such as a Grounding Kit, to be used during an operation and jobsite activities.
Acesso aberto (Open Access)
Metodologia de aterramento em linha de transmissão em ocorrência alternada 550 KV na Amazônia – um estudo de caso
(Universidade Federal do Pará, 2021-04-07) CARVALHO, Franklin Barbosa de; NASCIMENTO, Manoel Henrique Reis; http://lattes.cnpq.br/0850846128967798
Lightning strikes are of great importance for the electricity sector, being frequently responsible for disconnections of transmission lines, which can trigger a sequence of events that lead to the interconnected electrical system to collapse. The objective of this work is to propose a new methodology to correct the grounding resistances of the LT Oriximiná / Silves CD 550kV electric power transmission line in the Amazon aiming to reduce the occurrences of shutdown by disruptive return discharge, or backflashover, mitigating the damages caused to the system. electrical, considering the implementation cost factors, environmental technical feasibility, abruptness of the solution for other line structures, percentage of implementation reduction, it was concluded that the most adequate solution to implement a more robust grounding solution in the towers of the line transmission is the 03 solution tested on the 585 tower with a 66.98% reduction.