Blog / Tag
#motors
4 posts filed under this tag, newest first.
Choosing a VFD: what actually decides the size
Drives are sized on current, not kW — and the current on the box is before derating. Overload class, control mode, cable length and harmonics.
7 min read
DG set sizing: why motor starting usually governs
Two calculations decide a generator rating and most quotations do only one. A worked example where the starter choice halves the frame size.
7 min read
DOL, star–delta, soft starter or VFD: how to choose
Inrush is only half the decision. What each starter does to torque, which loads each suits, and the four failure modes that follow the wrong choice.
6 min read
Motor full load current at 415 V: the chart, and the caveats
Full load current for standard three-phase motors from 0.75 to 160 kW, with contactor, relay and cable figures — and why the nameplate rarely matches the table.
9 min read