bad electrical panel

Bad Electrical Panel. A Rare Speed Commander Appears! A Danish 4kW Motor Drive

I got hold of two electrical panels with a bad wiring job and the worst documentation. Not to say that it is completely out of code (racing fast for illegal). The did however turn out to contain a gem of lost times.

A “Speed Commander”, which is a Danish designed and produced 4 kW motor drive. It has a very simplistic interface consisting of only 16 settings. The manufacturer still exists ( ) but does not seem like they are selling motor drives anymore. There is a only a trace after it in the manuals section with refences to a V4 and V5. This is most likely the version 4.

Discussion of the teardown:

Mads Barnkob

Electrician, programmer, experimenter and amateur scientist with experience in industry automation, programming and all kinds of high voltage generating electronics. Administrator of and the high voltage community forum

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