PTC Relay

Do you know if the relay PTC (positive temperature coefficient) which is applied to most of present-day refrigerator appears to have dual functions, objects that usually form a small black box and this is in the cold state serves as a liaison between the pin R (run) with S (start ) when the compressor start operation (starting) will change as a function of the capacitor when it has become hot shortly after the compressor work, its value is in the range of 8 to 12 micro farrad, consequently if a compressor using these relays are used electricity consumption will be lower if the compressor is similar the use of capacitors running
Although it has disadvantages compared to regular relay (mechanical) because it will take some time when I have to restart but in fact safer ptc relay for compressor overload especially when combined with homemade 4TM Klixon® which is designed to be used with this relay, why is it safe? .. .. because after work circulates refrigerant compressor or freon freon pressure in the cooling system is not equitable and freon pressures are highest in the condenser so at this point would be difficult to restart the compressor is still high due to the pressure in the condenser was first lane is a freon circulates, so requiring first time that the pressure evenly for about 3 to 5 minutes, enough time so that it becomes cold PTC relay and the compressor is ready to operate again.