Search

Premium Membership

Learn from experienced power engineers. Study specialized technical articles, papers & video courses. Get 50% off on all courses & bundles with the Enterprise plan!

Home / Technical Articles / The case of phase-to-phase fault in a 13.8 kV switchgear caused by heavy rain

Case study

In this case study we describe a 13.8 kV switchgear phase-to-phase fault due to by heavy rain evolving into a three-phase fault that was cleared by transformer numerical relays. The generator was out of service and the fault was fed only from the 138 kV system.

The case of phase-to-phase fault in a 13.8kV switchgear caused by heavy rain
The case of phase-to-phase fault in a 13.8kV switchgear caused by heavy rain

We illustrate how a relay oscillography record for the 138-kV transformer side can be used to develop the analysis for the classification of the fault and confirmation of the fault location.

Since this study uses phase transformer differential relay 87TP, so let’s first remind of the basics of this protection.

PREMIUM Membership Required

This technical article/guide requires a Premium Membership. Get access to all premium HV/MV/LV technical articles, electrical engineering guides, and papers. Check out each plan’s benefits and choose the membership plan that works best for you or your organization.

You can choose an annually based Plus, Pro, or Enterprise membership plan.

NOTE! – With an Enterprise plan, you get a 50% off on all courses at the EEP Academy.

Log InSign Up

Premium Membership

Get access to premium HV/MV/LV technical articles, electrical engineering guides, research studies and much more! It helps you to shape up your technical skills in your everyday life as an electrical engineer.
More Information
author-pic

Edvard Csanyi

Electrical engineer, programmer and founder of EEP. Highly specialized for design of LV/MV switchgears and LV high power busbar trunking (<6300A) in power substations, commercial buildings and industry facilities. Professional in AutoCAD programming.

Leave a Comment

Tell us what you're thinking... we care about your opinion!

EEP Academy Video Courses

The learning platform for LV/MV/HV electrical engineers. Learn from experienced engineers and sharpen up your knowledge.
Electrical Engineering Software