Traveling-wave signal extraction equipment and system for short-circuit fault

The utility model discloses traveling-wave signal extraction equipment and system for a short-circuit fault, and the equipment comprises three live display devices which are respectively connected to three high-voltage insulators of three-phase power. The equipment also comprises three resistors and three capacitors. One end of each capacitor serves as one input end which is connected with one high-voltage insulator, and the other end of each capacitor serves as an output end which is grounded through the three resistors, so as to obtain a traveling wave signal of the short-circuit fault at the corresponding output end under the condition of two-phase or three-phase short-circuit faults. According to the utility model, one end of each capacitor is connected with one high-voltage insulator of the three-phase power, and the required short-circuit fault traveling-wave signals can be effectively obtained at the output ends, i.e., the other ends of the capacitors. Moreover, the traveling-wave signal extraction equ