Reclosers do not have simple interruption times, although 3 cycles at a maximum fault current on the fast curve is fairly common.
What you have to keep in mind is that reclosers have multiple purposes, and different reponse curves for the first time they detect a fault, and subsequent operations aafter they (reclose). This flexibility is what gives them the ability to keep service on under intermitten fault conditons, and to enable downstream devices to lock out before they do. Sorry to muddy the waters, but these are not dvices with a "one number" characteristic.