FIELD: electrical engineering. SUBSTANCE: device for protection of low-voltage electric installations against overvoltages, for instance interlocking, communication and other devices, has cable with metal sheath which leads are located in points of arrangement of grounding electrodes 2, discharges and resistor. Resistor is placed between one of grounding electrodes and metal sheath of cable. Metal sheath of cable is connected to another grounding electrode. Dischargers are placed between each conductor and each grounding electrode. EFFECT: enhanced operational safety of low-voltage electric installation. 2 dwg
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