Outland Technology Power Supply Tether Lengths

[EliotBR (Eliot)]

Hi @Slee,

This is likely useful:

@EliotBR

Power Transfer (Tether)

As per our voltage drop calculator, a 125m High-Power Tether Cable using two pairs of 23AWG wires to carry 400V, with a load draw of 1087W, would have an efficiency of ~94.1%. If you’ve got the longer 250m tether then the efficiency is ~87.3% instead. Accordingly, 1000W of power in the ROV uses 1200 / 0.941 \approx 1275 W of input power at the top side, or ~1375 W for the longer tether.

That comment has additional calculations about the rest of the system around it, which may also be of interest

EDIT: realised the tether efficiencies were slightly lower than they were supposed to be - have updated the source post and the quote.