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When a fault occurs in the user's T-connection of the 10kV overhead
distribution line, such as the fault is in its incoming line, or
although the fault occurs inside the user's incoming switch but its
protection action time limit is not matched with the substation
outgoing switch protection, it will cause the substation to go out.
The switch protection has tripped. If the nature of the fault is
permanent and the substation recloses unsuccessfully, an accident
in the medium-voltage user sector will cause the entire
distribution line to be out of power. This common spreading
accident in the distribution network will have a bad impact on the
society.
The ZW32-10KVoutdoor high-voltage AC boundary vacuum circuit breaker is an ideal
device to solve the above-mentioned accidents. A zero-sequence
current transformer is built in the outlet side of the device,
which is used in conjunction with the boundary controller.
Installed at the T-connection or user end of 10kV overhead
distribution lines, it can automatically remove single-phase ground
faults and automatically isolate phase-to-phase short-circuit
faults. Ensure the safety of electricity for non-faulty users. It
is suitable for use in substations, industrial and mining
enterprises, and rural power distribution systems for protection
and control and frequent operations.