نتایج جستجو برای: electric equipment

تعداد نتایج: 217219  

Journal: :iranian journal of medical physics 0
farshid ghorbani shahna assistant professor, occupational health dept., faculty of public health and research center for health science, hamedan university of medical sciences, hamedan, iran. mahboobeh eshaghi ph.d. student of occupational health, faculty of public health, hamedan university of medical sciences, shiraz, iran. tahereh dehghanpour b.sc. of occupational health, faculty of public health, hamedan university of medical sciences, shiraz, iran. zohre karami b.sc. of occupational health, faculty of public health, hamedan university of medical sciences, shiraz, iran.

introduction: public and occupational exposure to extremely low frequency (elf) electric and magnetic fields induced by electrical equipment is a significant issue in the environment and at the workplace due to their potential health effects on public health. the purpose of this study was assessment of the electric and magnetic fields intensities and determination of mental and psychological ef...

Journal: :Journal of the Korean geoenvironmental society 2014

Journal: :Transactions of the Atomic Energy Society of Japan 2008

2017
Zhuo Yang Junjie Ba Jing Pan Jian Chu Gang Li Lisha Gao

Aims: To design energy-saving control system of electrical system in office buildings; Methods: discusses the structure and function of electric control system of construction equipment, and points out the energy saving mode of the electrical automation control system of construction equipment. Finally, applies the above theory to the design of energy saving control system in X company’s office...

2014
ANGELA IAGAR GABRIEL NICOLAE POPA CORINA MARIA DINIS

The proliferation of nonlinear electronic loads is increasing day by day, and it can anticipate an influx of newer technologies in this domain in the future. This article focuses on the impacts of various home nonlinear electric equipment on the power quality of electrical distribution system. It was studied the influence of operating mode on the harmonic pollution generated by nonlinear home a...

2006
Zhao Buhui

Electric power is the mainstay of a nation’s economy and the lifeline of industrial production and social life. All parameters of an electric grid, especially harmonic parameters, are related to the quality of electricity generated, which guarantees safe operation of electric equipment. Therefore, this design combines a web-based electric grid parameter measurement system with a video-monitorin...

ژورنال: سنجش و ایمنی پرتو 2018

In the extremely low frequency range (3 to 300 Hz), the intensities of electric and magnetic fields increase with increasing voltage and current. If the intensities of electric and magnetic fields are high compared with standard exposure limits, they can have harmful effects on human health. In the vicinity of power lines and high voltage power stations, the intensities of these fields are usua...

2003
M. A. Omidiora

Condition monitoring of power substations is a significant issue for the National Electric Power Authority (NEPA) of Nigeria. Current methods for monitoring the condition of high voltage equipment are time consuming and often inaccurate, therefore causing catastrophic damage to the substation equipment. Recent research has demonstrated the efficacy of employing optical fiber sensors in conditio...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شیراز - دانشکده مهندسی 1387

چکیده ندارد.

2007
Ivan Samardžić

ABSTRACT The application of on-line monitoring system for recording main welding parameters during electric arc stud welding process at different electric arc stability changes is described in this paper. In the first part of the paper, the basics of electric arc stud welding process, and equipment for stud welding and process monitoring used in experimental part is described. In the second par...

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