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Home / Technical Articles / Mastering single line and wiring diagrams: MV earth fault protection

Directional earth fault protection

This technical article continues the series of articles dedicated to mastering single line and wiring diagrams of medium voltage switchgear. This time, the subject is the principle, and realization of earth fault protection applied to the same example switchgear used in the previous article. The focus of this article will be on directional earth fault.

Mastering single line and wiring diagrams: MV earth fault protection
Mastering single line and wiring diagrams: MV earth fault protection

If you didn’t read the previous article in this series, you can find it here.

There are numerous variations of MV switchgear topology, measurement, and control logic. However, there are also some basic rules related to these aspects which may be frequently seen in practice, with the purpose of increased safety and reliability during operation. Within this article, the real example of MV switchgear with two main busbar sections will be described.

Most of the attention will be given to concrete practical solutions related to some protection and measuring issues. This subject will be illustrated by use of adequate single line and wiring diagrams.

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Miodrag Kokotovic

Graduated from Faculty of Electrical Engineering, within University of Belgrade, in the field of electrical power systems. Expert in electrical part of tender preparation, design, procurement, construction and commissioning of treatment plants and pumping stations, electrical power quality and energy management.

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