A set of control units (usually including voltage transformer, CPU processor, communication module, etc. ) is added to vacuum circuit breaker, which has fault detection function, protection control function and communication function. Installed on 10KV overhead line, it can automatically cut off single-phase grounding fault and isolate interphase short-circuit fault.
Extended data:
Boundary switch function
Automatically cut off single-phase grounding fault. When a single-phase grounding fault occurs in the subscriber branch line, the boundary circuit breaker will be automatically turned off, and the users in the substation and other branches on the feeder line will not feel the fault. Automatically isolate the phase-to-phase short circuit fault. When the phase-to-phase short circuit fault occurs in the user's branch line, the boundary breaker trips before the substation outlet protection switch, and automatically isolates the fault line.
It will not affect the power failure of other branch users on the feeder. Quickly locate the fault point. When the user's branch line fault causes the protection action of the boundary circuit breaker, only the responsible user will cut off the power supply, and the power company can quickly send personnel to the site for investigation. If the boundary breaker is equipped with communication module, the information will be submitted to the power management center.
Monitor user load. When the boundary circuit breaker can be equipped with wired or wireless communication accessories, the monitoring data will be transmitted to the power management center to realize remote real-time data monitoring of user load. Remote operation function, users can operate the vacuum boundary circuit breaker through SMS or computer background.
References:
Baidu encyclopedia -ZW32- 12F watchdog boundary switch circuit breaker