It is a new product independently developed by our company with ZW32-12F outdoor AC high voltage vacuum circuit breaker (hereinafter referred to as the boundary circuit breaker). The boundary circuit breaker is a multi-functional intelligent device integrating vacuum circuit breaker, boundary circuit breaker and subsection. Boundary between main configuration by vacuum circuit breaker ontology, intelligent controller, the external boundary type voltage transformer (note: in the distribution network automation ring line optional PT) on both sides of three parts, the products are widely used in 10 KV city of ring network, rural power distribution network overhead line segment isolating switch, contact switch, can be a ring line load allocation automatic switching device,  it can be used as separating the switch (commonly known as watchdog) with in a large user of power points in the branch circuit, feeder overhead distribution network and used as the boundary between the breaker section, boundary between vacuum circuit breaker with remote management mode, protection control function and communication function. It can reliably judge and detect the zero-sequence current and phase-to-phase short-circuit fault current within the boundary of milliamps, and realize the automatic removal of single-phase ground fault and phase-to-phase short-circuit fault.

This installation and operation manual stipulates the reference standard, operating environment conditions, model and rated parameters, structure characteristics, working principle, ordering instructions, and operation, installation, use, maintenance methods and other contents of the boundary breaker.