3 results about "Vacuum circuit breakers" patented technology

Disclosed is an ultra-low-power power supply control system for permanent magnet vacuum circuit breakers. The control system belongs to the technical field of control systems of intelligent high voltage switches. A solar panel is connected with a power supply output circuit through a power supply input management circuit, the output end of the power supply output circuit is connected with a working power supply circuit and an operating power supply circuit, the output end of the working power supply circuit is connected with a protection and monitoring device, the output end of the operating power supply circuit is connected with an energy storage capacitor, the power supply output circuit is connected with the operating power supply controlling circuit, and the energy storage capacitor is connected with an input end of the operating power supply controlling circuit through a voltage collection circuit. The ultra-low-power supply control system further comprises a large power electric switching closing driving and controlling circuit, the input end of the large power electric switching closing driving and controlling circuit is connected with a switching signal inputting circuit and a closing signal inputting circuit, and the output end is respectively connected with the operating power supply controlling circuit and the large power electric switching closing driving and controlling circuit. Static power can be below 0.03 W, and power supply bootstrap of intelligent high voltage switches is achieved.

The invention relates to a quick vacuum circuit breaker and a control system thereof, which are applied to a 500KV power transmission line. The quick vacuum circuit breaker comprises at least three unit modules which are connected in series, and each unit module comprises two groups of circuit breaker assemblies which are connected in series; each group of circuit breaker assembly at least comprises a first main circuit breaker, a second main circuit breaker and a voltage-sharing capacitor which are connected in parallel, the first main circuit breaker is further connected with the first current-sharing reactor in series and then connected with the voltage-sharing capacitor in parallel, and the second main circuit breaker is further connected with the second current-sharing reactor in series and then connected with the voltage-sharing capacitor in parallel. According to the quick vacuum circuit breaker, a multi-break serial quick vacuum circuit breaker is formed by a unit module consisting of three serial unit modules and four main circuit breakers which are connected in parallel and in series, and the on-off time of the quick vacuum circuit breaker is reduced to 10ms, and the technical problem that the stability and the power transmission capacity of a 500kV power transmission line power system cannot be met due to the fact that the on-off time of a switch of an existing circuit breaker is 40ms is solved.

An advancing mechanism of single phase vacuum breaker handcart used on electronic rail way is prepared as fixing a driving shaft at bottom of said handcart through bearing, setting hexagon end on one end of said shaft and crosshead on another end of said shaft for driving master shaft to rotate when said shaft is rotated, fixing master shaft at bottom of said handcart near to rail, setting end plates with rollers at two ends of master shaft and rollers in guard block of body frame on said handcart for driving said handcart to move back and forward when master shaft is rotated.