Three-Phase Induction Motors
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View productsElectric Motors
Motors matched to the driven load
Nairobi Power Engineers supplies electric motors for pumps, fans, compressors, conveyors and process machinery, matched to the driven load and to a coordinated starter and protection scheme.
We size the motor from the load duty, then select the starter method — DOL, star-delta, soft starter or VFD — and the overload and short-circuit protection so the motor starts reliably and is protected in service.
Motors are specified to IEC 60034 with the efficiency class, mounting, enclosure (IP55 typical) and insulation class chosen for the application and ambient.
24/7 Emergency Support
Electrical service you can count on
When motor equipment fails, you need fast, reliable help from experienced engineers. We offer around-the-clock emergency support across Nairobi and East Africa — keeping your plant safe and powered, day or night. Whether it is an urgent breakdown or a scheduled repair, our team is ready to respond whenever you need us.
Cost and Estimates
What drives the cost
What affects the cost?
Rating and efficiency class (IE2/IE3), mounting and frame, enclosure and insulation class, plus the matched starter and protection. Duty and starts-per-hour also drive the selection.
Get a detailed estimate
We quote the motor with its starter, overload and cabling so the whole drive is costed, not just the motor.
Efficiency and running cost
IE3 premium-efficiency motors cut running cost on continuously running loads; our team advises where the payback justifies it.
Coordinated protection
Overload set to the motor full-load current and short-circuit protection coordinated to the starter — sized with the calculator on this page.
Product Family
Select the range for the job
Engineering Calculator
Motor Sizing & Starter Selection
Full-load current, protective device and starter method from motor rating.
Results
Full-Load Current
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Protective Breaker
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Recommended Starter
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Overload Setting
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* Preliminary sizing to IEC 60947. Confirm against motor nameplate before order.
Frequently asked questions
Which starter does my motor need?
From the rating and load: DOL to about 5.5 kW, star-delta or soft starter to about 22 kW, soft starter or VFD above that. The calculator on this page gives a starting point.
DOL, soft starter or VFD?
DOL is simplest; a soft starter reduces mechanical and electrical stress on start; a VFD adds speed control and energy saving on variable loads.
What efficiency class?
IE3 is recommended for motors that run for long hours; IE2 may be acceptable for intermittent duty. We advise on the payback.
How is the overload set?
To the motor full-load current, with the thermal class chosen for the load inertia. The calculator returns the FLC to set against.
When in doubt, put safety first
If you are ever unsure or feel unsafe, do not take chances — call a licensed engineer. Safety always comes first. Contact us for verification, specification and installation support.
+254 0737-944-014Speak to our experts