Abstract
Electromagnetic (EM) Field survey is a new adventure. EM Field sources are high-voltage transformers, distribution transformer (DT) stations, and overhead or underground power lines. The EMFs from nearby DT stations are easy to measure and identify. Consumers are typically exposed to varying EM Field levels when their offices and work areas are next to, over DT stations, secondary feeders, switchgears and electrical rooms. The process of spot measurement survey is rather straight forward, measure and record the EM Field levels, note significant levels, identify sources and recommend solutions. Distribution transformer (DT) stations are classified to separated room, enclosure panel, traditional room and kiosk. Magnetic field meters are used to provide easy and accurate measurement of magnetic field in different sites and locations. To quantify the problem and obtain realtime data, Alexandria Electricity Distribution Company (AEDC) has collected a preliminary survey and detailed measurements that will be included in an appropriate mitigation plan. In Alexandria grid, there are about 5700 DTs. The spot EM Fields surveys are measured the fields in and around the outside location for more than 200DTs. The objective of this paper is to present a general overview of EM Field survey in and around the MV-LV electrical installations. The paper presents: 1Results of EM Field levels and location of any expected problem. 2EMFs indices: CP05, CP95, compling with standards. 3Case studies for different model. 4Appropriate mitigation options, such as: prudent avoidance, rewiring and magnetic shielding A plan that will comprehensively cover a wide range of environments and circumstances.
Published Version
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