Search

Premium Membership ♕

Limited Time Offer: Save 15% on PRO Plan with discount code: LRN15 and study specialized LV/MV/HV technical articles and studies.

Home / Download Center / Electrical Engineering Books and Technical Guides / Schneider Electric MV/LV Tehnical Guides and Studies / Medium voltage switchgear application guide (transformers, motors etc.)

Medium voltage switchgear

Medium voltage switchgear application guide is based on the analysis of phenomena arising from the behaviour of electrical equipment (transformers, motors, etc.), during normal or faulty running.

Medium voltage switchgear application guide (transformers, motors etc.)
Medium voltage switchgear application guide (transformers, motors etc.) – photo credit: Edvard CSANYI

Its aim is to help you choose the type and characteristics of the medium voltage switchgear best adapted to your needs.

Medium voltage switchgear application guide was published quite a long time by Merlin Gerin (now Schneider Electric), but the facts presented are still actual and very useful for basic understanding of various applications for using MV switchgear:

  1. Transformer
  2. Motor
  3. Capacitor
  4. Generator
  5. Lines and cables
  6. Arc furnace

Switchgear for transformer application

Transformers feeder
Transformers feeder

The switch and contactor make sure the transformer is switched on and off during normal and overload running. The fuse limits and breaks short circuit currents generated by the upstream network short circuit power. The circuit breaker can make, withstand and break operating currents as well as short circuit currents.

The protection system (CT, VT, relay, release…) automatically causes tripping when a fault is detected.

Devices in this switchgear must be able to:

  1. Withstand and operate the continuous operating current and eventual overloads,
  2. Break the fault current at the connection point; on the transformer’s secondary terminals,
  3. Withstand short-circuit switching and no-load transformer switching peaks,
  4. Break the no-load currents without excessive overvoltage (downstream open).

The control and/or protection device must be located upstream of the transformer. Transformer faults cannot be picked up by downstream protection alone. A downstream control mechanism cannot isolate the fault transformer.

Title:Medium voltage switchgear application guide by Schneider Electric
Format:PDF
Size:1.60 MB
Pages:36
Download:Right here | Video Courses | Membership | Download Updates
Medium voltage switchgear application guide (transformers, motors etc.)
Medium voltage switchgear application guide (transformers, motors etc.)

Premium Membership

Get access to premium HV/MV/LV technical articles, advanced electrical engineering guides, papers, and much more! It will help you to shape up your technical skills in your everyday life as an electrical engineer.
50% Discount 💥 - Save 50% on all 90+ video courses with Enterprise Membership plan.

More Information

One Comment


  1. Shrikant M Sathe
    Sep 07, 2019

    Duty cycle of circuit breaker.
    Information about anti pumping feature of a circuit breaker.

Leave a Reply to Shrikant M Sathe

Tell us what you're thinking. We care about your opinion! Please keep in mind that comments are moderated and rel="nofollow" is in use. So, please do not use a spammy keyword or a domain as your name, or it will be deleted. Let's have a professional and meaningful conversation instead. Thanks for dropping by!

3  ×  two  =  

Learn How to Design Power Systems

Learn to design LV/MV/HV power systems through professional video courses. Lifetime access. Enjoy learning!

Subscribe to Weekly Newsletter

Subscribe to our Weekly Digest newsletter and receive free updates on new technical articles, video courses and guides (PDF).
EEP Academy Courses - A hand crafted cutting-edge electrical engineering knowledge