It has to meet all of the points below to not have a lid lock that remains lock while it is spinning, and yes it's most likely to spin faster than 3600RPM.
Hope this helps, Graham can always call me here at work.
1) Have a catch to hold it shut
2) Switch off the motor when lid opened
3) No more than 3600RPM
4) Rotor Energy no more than 1kJ
5) No more than 2000xg
6) Rotor radius no more than 25cm
7) Off Switch
8) See through Rotor Cover
9) If you can open it at more than 2 m/s it must have a sticker
