Locked Rotor

Our Reputation Precedes Us

With over 80 years’ experience in the industry, TA Boxall Engineering is one of the leading engineering services names. We pride ourselves on a skilled workforce and a professional service. We’ll test your machines using our trusted skills and methods in line with industry standards.

You Need Professionals to Handle Locked Rotor Testing

Locked rotor testing is something that should be done regularly on electric motors. Make no mistake; it is a dangerous test that could damage your motor if not carried out properly. That is why you need professionals like TA Boxall Engineering to perform the test. Our customers rely on us and trust us with their motors so why shouldn’t you? There’s no need to rely on vague estimates to perform a crucial test like a locked rotor test. We’ll measure accurately and inspect the squirrel cage for damage. Wherever you may be, we are at your service.

Why You Need Locked Rotor Test

Also called the blocked rotor test, short circuit test or stalled torque test, the locked rotor test is an essential part of the motor routine test. The test is meant to confirm your electric motor complies with your requirements as well meets its specifications. The locked rotor test helps to determine the different performance features of your induction motor such as power input and output, torque, slip, percentage efficiency, and so on. It provides information about leakage impedances

and rotor resistance. The test enables us to determine these parameters without having to load the motor. Locked rotor test provides information about your machine’s specifications including:

  • Magnetising reactance
  • Stator leakage reactance
  • Stator self-reactance
  • Rotor leakage reactance
  • Rotor self-reactance
  • R1 stator resistance
  • R2 rotor resistance

After collecting the necessary data, we can draw a diagram, which allows us to closely assess the motor in a practical operating environment. The locked rotor test is important if you want to prevent unnecessary accidents or damage to your motor.

Our Guarantee

  • Over 80 years experience
  • Unrivaled experience
  • An exceptional service
  • Unbeatable value for money
  • Industry-approved installers
  • A full range of electrical services
  • Professional, reliable and diligent
  • 100% safety and satisfaction

Why Choose TA Boxall Engineering?

We started as a family business more than 80 years ago, the company has earned an industry-wide reputation. Our commercial and industrial clients trust us to provide them with a quality service at all times. No need to guess why we are held in high regard, we’ll tell you:

Value for Money

Our services are moderately priced as we are determined to give you the best possible service. You’ll find that our prices are highly competitive.

Skilled Professionals

Our highly skilled professionals are qualified to handle the most delicate tests on your machines. We know motors like the back of our hand, don’t hesitate to trust us with yours. To top it all, we are ISO9001 certified and accredited by BAFE, ATEX, and NICEIC.

About TA Boxall


Happy clients mean we receive lots of positive word of mouth recommendations, which also means our partners’ reputations are under scrutiny when we act on their introductions. Our willingness to share our expertise and product knowledge within our partners’ organisations helps create a mutually beneficial working relationships and reciprocates that trust.


We pay attention to detail. Our proven industry-leading expertise and strong focus on safety, regulation and accreditation are all key factors when choosing Boxall Engineering. Clients often invite us to get involved early in their project design to help minimise costly design oversights.

Our History

Established in 1935, a small family engineering firm has evolved into a successful multi million pound business, providing a wide range of products and services to local enterprises and large multi nationals alike. Every client enjoys and benefits from the same focused delivery approach ensuring that each and every job is completed to the highest standards


With over 80 years experience of delivering quality service and solutions to our clients, we always seek to enhance not just our reputation, but our partners’ too. Service and quality underpin everything that we do. Experience counts.

Benefits of Working with TA Boxall

Our engineers, design, build, repair, maintain, install, commission electrical, mechanical and building solutions.

Experience working with simple and complex electrical, mechanical or building needs.

Our client testimonials demonstrate our product knowledge and our ability to meet often challenging deadlines.

Our clients choose to work with us again on their next project and trust us to deliver.

Excellent Service

We care about you as we do your machines. Rest assured we’ll deliver superb service any day.

Contact Us:

To get the professional help you need to test your machines, call TA Boxall Engineering on 01293820133 and let’s talk about your requirements.

DO YOU NEED A QUOTE? Contact us now with the project details