Breaking device for isolating switch and isolating switch using the same

Abstract

The invention relates to a breaking device for a disconnecting switch and the disconnecting switch using the same. The breaking device comprises a movable breaking device and a static breaking device, wherein the static breaking device comprises a circuit breaker, the circuit breaker comprises an arc extinguishing chamber and an operation handle, the operation handle has a switching position and a closing position which are used for driving a movable contact and a static contact of the arc extinguishing chamber into a switching state and a closing state during rotation of the operation handle around a rotation axis thereof, the movable breaking device comprises a shift rod fixedly arranged on a corresponding conductive rod, and a shift structure is arranged on the shift rod, and used for shifting the operation handle to be rotated into the closing position from the switching position before the movable contact and the static contact of the disconnecting switch are closed during closing of the conductive rod and shifting the operation handle to be rotated into the switching position from the closing position after the movable contact and the static contact of the disconnecting switch are switched during switching of the conductive rod. By the disconnecting device provided by the invention, the disconnecting switch has the ability of disconnecting large current, and the arc distinguishing chamber can be prevented from being energized for a long time due to serial connection of an auxiliary contact with the arc distinguishing device.

Description

technical field [0001] The invention relates to high-voltage electrical equipment, in particular to a breaking device for an isolating switch and a foldable isolating switch using the breaking device. Background technique [0002] As an outdoor high-voltage isolating switch with an air break, its main function is to provide electrical isolation for high-voltage electrical equipment under no-load conditions, so the isolating switch does not have the ability to break the rated current. This isolation can be used for daily operations or for high-voltage equipment. maintain. The foldable isolating switch includes the moving and static contacts of the isolating switch arranged at the front and rear and the foldable conductive rod arranged between the moving and static contacts of the isolating switch. The contact connection end of the contact, the conductive rod can realize the opening and closing between the dynamic and static contacts of the disconnector through horizontal fol...

AI Technical Summary

Problems solved by technology

The foldable isolating switch includes the moving and static contacts of the isolating switch arranged at the front and rear and the foldable conductive rod arranged between the moving and static contacts of the isolating switch. The contact connection end of the contact rod can realize the opening and closing between the dynamic and static contacts of the disconnector through horizontal folding action. With the development of series compensation technology, after the power system adopts series compensation device, the isolation switch The current that needs to be broken has reached 6300A, and its recovery voltage has reached 7000V. At this time, it is impossible to use the air break to break such a large current. Because the disconnector cannot eliminate the arc, the contact burns seriously and cannot be used for ultra-high voltage isolation. Switching between switch busbars cannot meet the requirements of extra-high voltage isolating switches in special occasions (such as bypass isolating switches)

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