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Universal stabilizer "USN-315" was produced since 1971. The voltage stabilizer ferroresonance type "USN-315" is designed to supply power from the network 127 and 220 in color and black and white televisions, as well as other household equipment. The rated voltage at the output of the stabilizer is 220 V, the no-load voltage is 226 V, the output power is 315 watts. When the network voltage varies within 154 ... 253 V (for 220 V network) and 89 ... 146 V (for 127 V network), frequency 50 Hz and 315 W active load, the stabilized voltage does not go beyond the lower limit equal to 205 volts. The coefficient of nonlinear distortion of the stabilizer is 8%, that is, one and a half times lower than in the current stabilizers for powering black-and-white TVs. The dimensions of the stabilizer are 170x237x148 mm, the weight with the winding from copper wire is 8.5 kg, with the winding from aluminum wire 7.5 kg.