CN105116253A - Live dismounting structure of lightning arrester on-line monitoring device - Google Patents

Abstract

This application relates to a live detachable structure of an online monitoring device for a lightning arrester, which includes a short-circuit device connected in parallel to the side of the monitoring device. The short-circuit device includes upper and lower contacts of the short-circuit device. The lower contact and the upper contact of the short-circuit device are connected to the upper contact of the lightning arrester online monitoring device through wires, and then connected to the ground terminal of the lower end of the lightning arrester. The lower contact of the monitoring device is connected in series with the lower contact of the short-circuit device and then grounded. The application solves the problems of on-line monitoring devices for live-line calibration and replacement of lightning arresters, and greatly improves the power supply reliability of the overall power grid.

Description

Chargeable Detachable Structure of On-Line Monitoring Device for Surge Arrester

technical field

The application relates to a live detachable structure of an online monitoring device for a lightning arrester.

Background technique

At present, when all on-line monitoring devices of 110kV and above voltage level surge arresters fail, the power equipment must be stopped once for calibration and replacement, which directly reduces the reliability of power supply.

In the prior art, there is no relevant technical content that can maintain the online monitoring device of the arrester without stopping the power equipment.

Contents of the invention

The purpose of this application is to propose a live detachable structure of the arrester on-line monitoring device that can be operated on live and can maintain the arrester on-line monitoring device without stopping the power equipment.

The purpose of this application is achieved in this way: the live detachable structure of the lightning arrester online monitoring device includes a short-circuit device connected in parallel on the side of the monitoring device, the short-circuit device includes the upper and lower contacts of the short-circuit device, and the upper and lower ends of the lightning arrester online monitoring device are respectively provided with monitoring The upper and lower contacts of the device, the upper contact of the short-circuit device are connected to the upper contact of the lightning arrester online monitoring device through wires, and then connected to the ground terminal of the lower end of the arrester, and the lower contact of the monitoring device is connected in series with the lower contact of the short-circuit device and then grounded.

Due to the implementation of the above-mentioned technical scheme, under normal operating conditions, the short-circuit device is in the disconnected position, and the leakage current of the arrester flows into the ground through the online monitoring device; when the online monitoring device of the arrester fails or needs to be checked, the short-circuit device Closed, the leakage current of the arrester flows into the ground through the grounding short-circuit device. At this time, the online monitoring device of the arrester is at the ground potential, and it can be checked or replaced. After the work is completed, the short-circuit device is disconnected to restore the online monitoring device of the arrester to normal operation. state. Now that the requirements for power supply reliability are becoming more and more stringent, the problems of live calibration and replacement of lightning arrester online monitoring devices have been solved, and the power supply reliability of the overall power grid has been greatly improved.

Description of drawings: the specific structure of the application is provided by the following drawings and examples:

Fig. 1 is a schematic structural diagram of a live detachable structure of an on-line monitoring device for a lightning arrester.

Legend: 1. Lightning arrester, 2. Short-circuit device connection line, 3. Upper contact of monitoring device, 4. On-line monitoring device of lightning arrester, 5. Lower contact of monitoring device, 6. Lower contact of short-circuit device, 7. Short-circuit device, 8. Short-circuit device Upper contact, 9, static contact, 10, moving contact, 11, moving rod, 12, fixed point, 13, rotating shaft, 14, expansion bag, 15, inflation and deflation port, 16, fixed rod.

Detailed ways:

The present application is not limited by the following examples, and specific implementation manners can be determined according to the technical solutions of the present application and actual conditions.

Embodiment: As shown in Figure 1, the electrified detachable structure of the lightning arrester online monitoring device includes a short-circuit device 7 connected in parallel to the side of the monitoring device 4, and the short-circuit device 7 includes the upper and lower contacts 8, 6 of the short-circuit device, and the lightning arrester is online The monitoring device 4 is an existing technology, and its specific structure will not be described in detail here. The upper and lower ends of the online monitoring device 4 of the arrester are respectively provided with upper and lower contacts 3 and 5 of the monitoring device, and the upper contact 8 of the short-circuit device is monitored online through the wire and the arrester. The upper contact 3 of the device 4 is connected and then connected to the ground terminal at the lower end of the arrester 1, and the lower contact 5 of the monitoring device is connected in series with the lower contact 6 of the short-circuit device and then grounded.

The short-circuit device may be a knife switch.

As shown in Figure 2, the short-circuit device includes a fixed rod 16 and a moving rod 11, an expansion bag 14 is attached under the moving rod 11, and the lower end surface of the expansion bag 14 is in contact with a stopper, In this application, the limiting component is the fixed rod 16 . One end of the fixed rod 16 is a fixed point 12, a rotating shaft 13 is arranged at the center of the fixed point 12, and the rear end of the moving rod 11 is fixedly connected with the rotating shaft 13. The fixed rod 16 and the moving rod 11 are conductive components.

The upper contact 3 of the monitoring device is connected to the lower circuit with a static contact 9, and the lower contact 5 of the monitoring device is connected to the fixed rod 16 circuit. The front end of the moving rod 11 is provided with a moving contact 10 which is matched and connected with the static contact 9 . With the expansion of the expansion bag 14, the moving rod 11 rotates, and the moving contact 10 contacts the static contact 9, so that the upper and lower contacts 3, 5 of the monitoring device are conducted and short-circuited. The expansion bag 14 is provided with an inflation and deflation port 15 , and the expansion or contraction of the expansion bag 14 is controlled by filling and deflation of the expansion bag 14 , thereby controlling the swing of the brake rod 11 , and further controlling the short circuit or disconnection of the short circuit device 7 .

When in use, the application is in the normal operating state, the short-circuit device 7 is in the disconnected position, and the leakage current of the arrester flows into the earth through the online monitoring device; when the arrester online monitoring device fails or needs to be checked, the short-circuit device 7 is closed Above, the leakage current of the arrester flows into the ground through the ground terminal of the short-circuit device 7. At this time, the online monitoring device of the arrester is at the ground potential, and it can be checked or replaced. After the work is completed, the short-circuit device 7 is disconnected to restore the online monitoring device of the arrester to in normal operating condition.

The above technical features constitute the best embodiment of this application, which has strong adaptability and best implementation effect, and non-essential technical features can be added or subtracted according to actual needs to meet the needs of different situations.

Claims (5)

1. A live detachable structure of an arrester on-line monitoring device, characterized in that: comprise a short-circuit device connected in parallel on the monitoring device side, said short-circuit device includes an upper and a lower contact of the short-circuit device, and the upper and lower ends of the arrester on-line monitoring device are respectively provided with monitoring The upper and lower contacts of the device, the upper contact of the short-circuit device are connected to the upper contact of the lightning arrester online monitoring device through wires, and then connected to the ground terminal of the lower end of the arrester, and the lower contact of the monitoring device is connected in series with the lower contact of the short-circuit device and then grounded. 2. The live detachable structure of the lightning arrester on-line monitoring device according to claim 1, characterized in that: the short-circuit device is a knife switch. 3. The electrified detachable structure of the lightning arrester online monitoring device according to claim 1, characterized in that: the short-circuit device includes a fixed rod and a moving rod, and an expansion bag is attached under the moving rod, and the expansion bag The lower end surface is in contact with a limiting component. In this application, the limiting component is a fixed rod. One end of the fixed rod is a fixed point, and a rotating shaft is arranged at the center of the fixed point. The rear end of the moving rod is fixedly connected with the rotating shaft. 4. The live detachable structure of the lightning arrester on-line monitoring device according to claim 3, characterized in that: the fixed rod and the moving rod are conductive parts. 5. The electrified detachable structure of the lightning arrester online monitoring device as claimed in claim 3, characterized in that: the upper contact of the monitoring device and the lower circuit are connected with static contacts, the lower contact of the monitoring device is connected with the fixed rod circuit, and the dynamic The front end of the rod is provided with a moving contact connected with the static contact.