ZW32-24 Outdoor high voltage vacuum circuit breaker

Product Overview
The ZW32-24 outdoor high-voltage vacuum circuit breaker is an outdoor power distribution device rated for 24 kV,
three-phase AC 50 Hz. This circuit breaker is primarily used for breaking and making load currents, overload currents
and short-circuit currents in power systems, as well as for instantaneous protection, earth fault protection, selectable
reclosing frequency, local remote control and remote communication functions. It is suitable for use in substations and
the power distribution systems of industrial and mining enterprises for protection and control purposes. In the event of
a fault occurring within a user’s premises on a 24 kV T-connected circuit, or even if the fault occurs on the user’s side
of the feeder switch but the protection time delay is not synchronised with that of the substation’s feeder switch, this
will result in the substation’s feeder switch tripping. If the fault is permanent and the substation is unable to
successfully reclose, a fault within a single medium-voltage user’s premises will cause a power outage along the entire
distribution feeder. Such cascading faults, which are common in power grids, can cause significant losses to society.
The ZW32-24F outdoor high-voltage vacuum circuit breaker (hereinafter referred to as the circuit breaker), installed at
the boundary of responsibility for overhead lines—that is, at the front end of the user’s incoming line—will
automatically isolate single-phase earth faults and phase-to-phase short-circuit faults within the user’s premises. This
prevents faults within the user’s premises from affecting the transmission feeder, ensures the safety of power supply to
non-faulty users, and improves the reliability of power supply.

Main technical parameters