There is a global cooldown for the same kind of skill, for example rapid fire, you can have multiple copies of it, but when you activte one, all other go into a 15second cooldown as well. while the rapid fire you activated has a 30 second cooldown.
Or torpedoes have a 1 second global cooldown, which means that no matter how many launchers you have, you won't be fireing more then 1 launcher per second.
-= ISE: 12:19 -=- CSE 12:41 -=- KASE 11:59 -=- HSe 8:06 total =-
-= KAGE 5:43 =-
[7:07] [Combat (Self)] Your Dual Disruptor Banks - Overload II deals 123086 (41096) Disruptor Damage(Critical) to Assimilated Carrier.