Adjacent-grounding systems, in metropolitan areas, are usually interfering because, moreover, common external conductive parts naturally interconnect them. Their integration to constitute a grounding microgrid system (GMS) allows making each grounding system (GS) more extended than its ground electrode. It assists resolutely to present limited touchn permissible to persist longer than 10 s and so to create the conditions of an intrinsically safe grounding system. An intentional common integration of adjacent-grounding systems is admissible, because each one of the grounding systems must satisfy equal protection requirements prescribed by utilities. This article deals with three sample cases of measurements on grounding systems in areas with high GSs density and of a large size. The tests allows identifying a GMS assessing for each component ground electrode a dispersing capacity of the fault current more extended than its size up to its efficiency saturation. The identification by measures of GMSs contributes to recognize and improve natural integrations and promote the progress of the common safety, regardless of formal validation.

中文翻译：

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大都会和商业区的接地微电网系统

大都市地区的相邻接地系统通常会产生干扰，因为此外，公共外部导电部件自然地将它们互连。它们构成接地微电网系统 (GMS) 的集成允许使每个接地系统 (GS) 比其接地电极更延伸。它坚决有助于提供允许持续超过 10 秒的有限接触，从而为本质安全接地系统创造条件。相邻接地系统的有意共同集成是允许的，因为每个接地系统都必须满足公用事业规定的同等保护要求。本文介绍了在高 GSs 密度和大面积区域的接地系统测量的三个示例案例。该测试允许识别 GMS，该 GMS 评估每个组件接地电极的故障电流分散能力比其大小更扩展直至其效率饱和。无论正式验证如何，通过测量识别 GMS 有助于识别和改进自然整合并促进共同安全的进步。