Online monitoring device for temperature of contact arms of high-voltage circuit breaker of 10-KV high-current switch cabinet

The invention discloses an online monitoring device for temperature of contact arms of a high-voltage circuit breaker of a 10-KV high-current switch cabinet. The online monitoring device comprises a power supply conversion panel, a current transformer, a digital temperature sensor, a wireless encoding and transmitting module as well as a wireless receiving and decoding module and a temperature display and alarm device, wherein the power supply conversion panel is installed on the contact arms; the current transformer supplies power to the power conversion panel; the wireless receiving and decoding module and the temperature display and alarm device are located outside the switch cabinet; the wireless encoding and transmitting module is used for reading temperature data of the digital temperature sensor, processing the temperature data into an encoded signal and wirelessly transmitting the signal; the wireless receiving and decoding module for receiving and decoding codes is connected with the temperature display and alarm device; the power supply conversion panel comprises two high-power clamping diodes which are in reverse parallel connection with an output end of the current transformer, and a rectifier filter circuit which is in parallel connection with the output end of the current transformer; and the rectifier filter circuit is connected with a wide-voltage stabilizing circuit, consisting of a current-limiting resistor and a high-power wide-voltage stabilizing tube. According to the online monitoring device for temperature of the contact arm of the high-voltage circuit breaker of the 10-KV high-current switch cabinet, the electricity is obtained by sensing, a work power supply obtained by the device itself is stable and reliable and the uninterrupted passive power supplying for the wireless encoding and transmitting module is realized.