Movable lifting isolating switch capable of opening and closing 35kV cable capacitance current

Abstract

The invention discloses a movable lifting isolating switch capable of switching on and off capacitance current of a 35kV cable. The movable lifting isolating switch comprises an isolating switch main body and a base, according to the invention, the hydraulic rod is controlled to push the lifting frame to unfold, the top plate drives the disconnecting switch main body to carry out height adjustment in the vertical direction, transformation is carried out based on a GW4 type disconnecting switch at the present stage, a single-phase independent operating mechanism is designed, and a control box is designed and manufactured, so that three-phase operation or single-phase independent operation can be carried out; in the lapping process, a worker firstly carries out power-off cable lapping work, then a live-line worker completes live-line lapping work of a 35kV wire at the other end, finally, an operator remotely completes opening and closing remote control operation of the device, the dismantling sequence is opposite to that of the device, the opening and closing function of capacitance current of the 35kV single-core cable is achieved, and the device is simple in structure and convenient to operate. And the device can be moved and lifted in combination with field conditions, so that the inter-phase safety distance and the ground safety distance in the operation process of 35kV equipment are met.

Description

technical field [0001] The invention relates to the technical field of isolating switches, in particular to a movable lifting isolating switch capable of opening and closing 35kV cable capacitive current. Background technique [0002] The isolating switch is a switching device that is mainly used to "isolate power supply, switch operation, connect and cut off small current circuits", and has no arc extinguishing function. When the isolating switch is in the off position, there is an insulation distance between the contacts that meets the specified requirements and an obvious disconnection mark; current switching device. It is generally used as a high-voltage disconnector, that is, a disconnector with a rated voltage above 1kV. Its working principle and structure are relatively simple, but due to the large amount of use and high requirements for working reliability, it is very important for the design, establishment and maintenance of substations and power plants. The impac...

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Problems solved by technology

[0003] According to the safety technical requirements of live lapping, when the capacitive current of the no-load cable is greater than 0.1A, the arc suppression switch should be used for operation, and according to the calculation, there will be a capacitive current of not less than 0.5A in the 35kV cable of 150 meters, so it cannot be directly connected to 35kV Therefore, it is urgent to propose a corresponding movable lifting isolating switch, so that it can be applied to different substation site conditions and 35kV line entry conditions.

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