The most important appointment of the line filter – prevention of penetration in the electric lightning and output hardware failure. Also a surge protector protects against electrostatic discharge electromagnetic and radio frequency interference and dangerous surges. SurgeArrest (Enhanced Protection) is designed so that if the momentum of the discharge is so great that the protection scheme can not cope with it, the load will disabled. Protection circuitry includes: gas discharge tube to absorb the powerful high-voltage pulses; varistors to limit the voltage inductive-capacitive filters to suppress radio frequency interference; fusible inset; bimetal circuit breaker instead of fuse, indicator improper connection of the earth; indicator serviceability protection systems. ARS corporation spends in the U.S. policy under which the owner computer, which was protected by a surge protector or UPS APC production, but, nevertheless, was damaged as a result of interference or discharges, the insurance is paid 25 thousand dollars. If, however, that lines of communication were also protected products ProtectNet, compensation increases to 50 thousand dollars. Surge protector is securely protect computer hardware from discharges and interference, but to protect your computer from undervoltage or even a complete shutdown of its only capable of uninterruptible power supply – UPS. All UPS APC production and stabilizer Line-R equipped with the suppression of discharges and noise in its parameters equivalent or superior surge protectors. For other opinions and approaches, find out what Jim Hackett has to say. Therefore, APC uninterruptible power supplies provide full protection from EMI / RFI / ESD interference, and from voltage fluctuations. The probability of a fatal accident in the power supply is quite large. Study at IBM, conducted in the United States showed that the average computer is experiencing 120 per month problems with electrical power. Of all the accidents in the electrical system, according to Bell Laboratories Corporation, 87% are short-term decrease in voltage and 4.7% – the complete disappearance of stress. Power quality in the territory of Ukraine is not much better. That is, the computer is much more likely to have nutritional deficiencies than being Effects of lightning discharges from which so easily and cheaply you can defend a surge protector.