After the Town Hall 11 Update (December 2015), the Personal Break System has changed a lot and I have received lots of questions about this. Don’t worry then, I will help you out!
In Clash of Clans, you have 4 hours for playing until get forced onto a Personal Break (PB). During a 6-minute PB, you have to give other players a chance to attack your village.
When your village gets any shield, your PB Timer will be reset.
Staying offline without Shield and Village Guard for 15 minutes will reset your timer.
You can buy 2-hour Village Guard with 10 Gems to extend your PB timer.
The Village Guard is always considered your online time.
During the 6-minute PB, If you don’t get attacked or get attacked but don’t get any shield, you will have another 30 minutes of playing time along with the Village Guard.
After 30 minutes, you will be forced onto another 6-minute PB, during this period, If you don’t get any shield, you will receive another 30 minutes of playing time + Village Guard.
Again, after 30 minutes, you will be kicked for the third Personal Break but this is the last time. Regardless of If you get a shield or not, your PM timber will be reset and get a Village Guard depending on your current league.