Search

Premium Membership

Study specialized technical articles, papers & courses in low/high voltage fields. Save 50% on all courses at the EEP Academy with the Enterprise Plan.

Home / Technical Articles / My practical experience in the electrical protection system of industrial generators

Detect, discriminate & disconnect fault

A functional protection system installed, commissioned, and maintained on critical equipment like an industrial generator is of high importance. As such, every protection system must have the ability to: accurately detect, discriminate and isolate, and timely disconnect any fault.

My practical experience in the electrical protection system of industrial generators
My practical experience in the electrical protection system of industrial generators (photo credit: EEP)

Each of the named ability that protection system must-have can be described in a sentence:

  1. Detect: Accurately pick-up any abnormal fault condition in the electrical network.
  2. Discriminate: Isolate abnormal electrical conditions from a point (i.e., circuit breaker or switchgear) closest to the fault location.
  3. Disconnect: Clear fault conditions by the timely disconnection of abnormal circuits to limit the extent of prospective damage to equipment and personnel to a level that is as low as reasonably practicable.

The scope of this technical article is limited to the best practices of electrical protection systems as applied in industrial generator sets. Compulsory protection schemes and a case-study of a successful troubleshooting effort on a generator protection system will be discussed.

Table of contents:

  1. Components of an electrical protection system
    1. Power supply
    2. Sensors
    3. Logic
    4. Output
  2. Compulsory protection schemes for industrial generator-sets
    1. Overcurrent protection
      1. Instantaneous overcurrent protection (ANSI Code 50)
      2. Timed overcurrent (ANSI Code 51)
  3. Case Study
    1. Instantaneous overcurrent
    2. Timed overcurrent protection
    3. Undervoltage and overvoltage protection (ANSI 27 and 59)
    4. Synchronization protection (ANSI 25)
    5. Differential protection (ANSI Code 87)
  4. My troubleshooting experience

1. Components of an electrical protection system

A reliable protection system must comprise of the following components which are pre-selected and configured to achieve a protection philosophy that is well suited for its intended application. They are:

Premium Membership Required

This technical article/guide requires a Premium Membership. You can choose an annually based Plus, Pro, or Enterprise membership plan. Subscribe and enjoy studying specialized technical articles, online video courses, electrical engineering guides, and papers. With EEP’s premium membership, you get additional essence that enhances your knowledge and experience in low- medium- and high-voltage engineering fields.

Check out each plan’s benefits and choose the membership plan that works best for you or your organization.

50% Off! – Enterprise plan includes a 50% Off Code for unlimited apply on all courses.

Log In »Register »

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

Ezeala Winner

I'm an electrical and controls engineer with core strengths in electrical protection and PLC-based control systems. My excellent performance in design, commissioning, maintenance, and troubleshooting of HV/LV switchboard controls and power equipment positions me as a valuable asset to an industrial environment.

Leave a Comment

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!

forty eight  ⁄    =  6

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).