Premium Membership ♕

Save 50% on all EEP Academy courses with Enterprise Membership Plan and study specialized LV/MV/HV technical articles & guides.

Home / Technical Articles / Soft starter for potable water well pump (wiring diagram, troubleshooting example)

Introduction to application

This article will analyze a real example of an electrical switchboard for a potable water well pump, containing a soft starter as one of the major components. Besides the explanation of the wiring diagram and working logic, some technical problems which were occurred during start-up and operation will be described also.

Wiring diagram and troubleshooting the soft starter for potable water well pump
Wiring diagram and troubleshooting the soft starter for potable water well pump

Well pump is installed underground, on the bottom of vertical, narrow, about 30 meters long pipe. From that depth, clean water is transferred via a pipeline constructed above the ground to a large reservoir tank at the top of steel made supporting structure in the form of a tower.

The pump’s flow is determined by its construction and hydraulic resistance of the pipeline. This resistance consists of two components:

  • Static: which is defined by the height difference between a reservoir as a destination point and pump as source point; and
  • Dynamic: which is defined by the friction of pipeline’s inner walls for given flow rate. No flow control by electrical means was required, hence the use of variable frequency drive was not necessary.

Table of contents:

  1. Basics about soft starters
  2. Example of wiring diagram
  3. Troubleshooting example
    1. Problem
    2. Solution

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.

Good To Know!Save 50% on all video courses by purchasing Enterprise plan.

Log In »Purchase »

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

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.

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!

fifty five  +    =  fifty eight

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