Draw a straight line 6cm long.
Put the compass point at one end of the line and extend the compass to the other end of the line.
Draw an arc of this radius from each end of the line,
Join the point where the arcs intersect to each end of the the line and ypu have your equilateral triangle.
The wavelength of 100 ev is 1.25uevm/100ev= 12.5 nm (nanometer).
starting current of 315 kw motor in start delta 2.5 time for single sec. if your cable lingth 130 meter u can use 150mm2 (3 cable per phase) 150mm2 single cable current 292 Amp voltage drop 0.28/meters so u can use breaker 1000 Amp and set Im time (for starting current) setting avalible in breaker.