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Nairobi Power Engineers Ltd (NPE) logo Nairobi Power Engineers

Three-Phase Induction Motors

The workhorse of industrial drives

Three-phase induction motors drive the majority of industrial and commercial machinery — pumps, fans, compressors and conveyors. NPE supplies them matched to the load and to a coordinated starter and protection scheme.

We select the frame, mounting, efficiency class and enclosure for the duty, and pair the motor with the correct DOL, star-delta, soft-starter or VFD control.

24/7 Emergency Support

Electrical service you can count on

When three-phase 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

Wide rating range

From fractional to high-power frames for the full range of industrial loads.

Matched starter

DOL, star-delta, soft starter or VFD selected by rating and duty.

IP55 enclosure

Standard totally-enclosed fan-cooled construction for industrial environments.

Coordinated protection

Overload to FLC and short-circuit protection coordinated to the starter.

Engineering Calculator

Motor Sizing & Starter Selection

Full-load current, protective device and starter method from motor rating.

Results

Full-Load Current

Protective Breaker

Recommended Starter

Overload Setting

* Preliminary sizing to IEC 60947. Confirm against motor nameplate before order.

Frequently asked questions

What speed do I get?
Set by the pole count and supply frequency — 2-pole ≈ 2900 rpm, 4-pole ≈ 1450 rpm at 50 Hz; we match it to the driven load.
Can I add a VFD later?
Yes, an inverter-duty motor is preferred if a VFD is planned; we can specify accordingly.
Foot or flange mount?
Both are available — foot for base-mounted, flange for pump and gearbox coupling.
What about high starts per hour?
We check the thermal class, starter duty and contactor endurance for frequently started loads.

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.

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