Any owner knows that the voltage in the mains is never stable. It depends on the place of residence and can change in large limits. As practice shows, the further the object is located, the greater the likelihood of voltage surges. For modern household appliances, this situation is dangerous. Any leap threatens that devices (electric ketters, microwaves, TVs, etc. p.) will simply stop starting. The only solution in this situation is the use of special stabilizers.