In the last two bits, I feel that the game mechanics are not clear. With the last bit (keeping the cable plugged in) I know that it's wrong and with the bit before (changing the fuses and the power) I'm not sure.

The cable:
What you think how it works: The cable needs to be plugged in for a certain total amount of time.
How it actually works: You plug it in, a wave of robots comes. If you prevent the cable from being unplugged long enough, you advance 25% (and a save point). If it is unplugged too early, you have to restart from that multiple of 25% again. Example: You managed to get to 50%, a robot unplugs just before you hit 75% -> You drop down to 50% again and as soon as you plug it in, the next wave arrives (same size as the first time after you hit 50%).

The fuses:
What you're told how it works: If the fuses blow, Winta just can't continue. That means, the whole thing needs to be operational for a certain total amount of time.
What I believe how it works: You need to complete several power adjustments without ever having ALL four fuses blow. As soon as at some point all fuses blow, you are reset to some point (which is not at all made clear to the player). I spent waaaay too long replacing fuses for it to be the intended length.

It would really be nice if the player properly understood the game mechanics to know when there is a time limit and when there isn't.