Actually thinking about it, a 32A breaker feeding a 3kVA transformer sounds a lot more than is sensible, is it on the output?
If is is a DP on the output you already have you cable protection, but you really would need it to be a D-curve to have any hope of coordinating with the commando socket's 16A MCBs (assuming they are B-curve).
Also if that 32A is on the primary and you have the misfortune of a 55V-0V short it would look more like a 134A breaker on the secondary and that will not end well for 2.5mm cable!