Residual current devices in LV

نویسنده

  • Jacques Schonek
چکیده

«Cahiers Techniques» is a collection of documents intended for engineers and technicians, people in the industry who are looking for more in-depth information in order to complement that given in product catalogues. Furthermore, these «Cahiers Techniques» are often considered as helpful «tools» for training courses. They provide knowledge on new technical and technological developments in the electrotechnical field and electronics. They also provide better understanding of various phenomena observed in electrical installations, systems and equipments. Each «Cahier Technique» provides an in-depth study of a precise subject in the fields of electrical networks, protection devices, monitoring and control and industrial automation systems. Please contact your Schneider Electric representative if you want either a "Cahier Technique" or the list of available titles. The "Cahiers Techniques" collection is part of the Schneider Electric's "Col-lection technique". Foreword The author disclaims all responsibility subsequent to incorrect use of information or diagrams reproduced in this document, and cannot be held responsible for any errors or oversights, or for the consequences of using information and diagrams contained in this document. Reproduction of all or part of a "Cahier Technique" is authorised with the compulsory mention: "Extracted from Schneider Electric "Cahier Technique" no. ..." (please specify). Lexicon Common mode disturbance Any continuous or transient electromagnetic phenomenon occurring between a live part of a power system and earth. May be a transient overvoltage, a continuous voltage, an overcurrent or an electrostatic discharge. Differential mode disturbance Any phenomenon between different live parts of a power system, e.g. an overvoltage. Direct contact Contact of a person with the live parts of electrical devices (normally energised parts and conductors). Earth-leakage current Current that flows from the live parts to earth, in the absence of an insulation fault. Electrisation Application of voltage between two parts of the body of a living being. Electrocution Electrisation resulting in death. Exposed conductive part (ECP) Conductive part likely to be touched and which, although normally insulated from live parts, may be energised up to a dangerous voltage level due to an insulation fault. Indirect contact Contact of a person with accidentally energised exposed conductive parts (ECP), usually due to an insulation fault. Insulation Arrangement preventing transmission of voltage (and current flow) between a normally energised part and an exposed conductive part (ECP) or earth. Insulation fault Break in insulation causing an earth-fault current or a short-circuit via the protective conductor. Intentional leakage current Current that flows to …

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تاریخ انتشار 2006