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Transferred voltages by the neutral grounding appear when a fault to ground occurs in the medium voltage network of the distribution system, when the primary and secondary neutrals are interconnected in the distribution transformers. This phenomenon is particularly important in systems with multigrounded neutrals where a local fault is "seen" by the whole circuit, because of the multiple...
This paper presents a substation grounding grid analysis with the variation of soil layer depth. The grounding grid system of a practical 22 kV substation, in which the ground grid is made from copper, is calculated by virtue of the CDEGS software. The study, supported by Provincial Electricity Authority (PEA), Thailand, is based on grounding grid system of Royal Flora RATCHAPHRUEK substation. The...
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