3.3KV 450 KW Motor Soft Starter Demand

Internet search engines, the local Yellow Pages and local trade directories are three possible sources of information. Also, search Globalspec, Alibaba, etc. (usual disclaimer). Do it by telephone wherever possible; it's far faster than the internet as one is talking with a real human being with an interest in negotiating a sale, and sales office telephones are programmed so that the next available individual can pick up the call. Failing that, fax, so that anyone at the other end can pick up the ball and run with it.

Good luck.

Soft starters and VFDs are NOT the same thing, and the cost dirrence is a factor of 10 in most cases (VFD = Soft Starters x 10). You need to decide ahead of time which one you want. If there is no need to vary the speed, you likely do not need a VFD. But a soft starter cannot accelerate the motor with less than 200% of motor nameplate FLA if completely unloaded, usually much more. So if you have a severely limited available power source or some other restriction on starting kVA, then a soft starter may not work and it MUST be a VFD.

There are also several mfrs of MV soft starters who do NOT offer MV VFDs. Even among those that can provide both, the products are so different that they often have separate sales and support groups. So decide WHAT you want / need first, then pursue suppliers with LOCAL representation in Nigeria or other nearby environs.