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4 crucial devices used for distribution system protection (selection and installation tips)

Home / Technical Articles / 4 crucial devices used for distribution system protection (selection and installation tips)

Protection of distribution networks

A wide variety of equipment is used to protect distribution networks. The particular type of protection used depends on the system element being protected and the system voltage level. And even though there are no specific standards for the overall protection of distribution networks, some general indication of how these systems work can be made.

4 crucial devices used for distribution system protection (selection and installation tips)
4 crucial devices used for distribution system protection - selection and installation tips (on photo: protection relay type SEL421; credit: digitalsubstation.com)

The devices most used for distribution system protection are:

  1. Overcurrent relays
    1. Definite-current relays
    2. Definite-time/current or definite-time relays
    3. Inverse-time relays
  2. Reclosers
  3. Sectionalisers
  4. Fuses

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Edvard Csanyi - Author at EEP-Electrical Engineering Portal

Edvard Csanyi

Hi, I'm an electrical engineer, programmer and founder of EEP - Electrical Engineering Portal. I worked twelve years at Schneider Electric in the position of technical support for low- and medium-voltage projects and the design of busbar trunking systems.

I'm highly specialized in the design of LV/MV switchgear and low-voltage, high-power busbar trunking (<6300A) in substations, commercial buildings and industry facilities. I'm also a professional in AutoCAD programming.

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