CN205643404U - Framework type leakage current of an arrester test loop terminal box - Google Patents

Abstract

The utility model relates to a junction box for a leakage current test circuit of a frame-type arrester, which is composed of an insulating box, a metal closed box, an arrester current leakage detection mechanism and a junction box. The arrester current leakage detection mechanism is composed of an arrester insulation base and a counter. The box-type closed structure is adopted, and the connection part of the arrester resistive current test circuit is moved to the lower part of the arrester structure, which avoids the safety hazard caused by the wiring during the leakage current test of the arrester, and is easy to install, easy to operate, strong in practicability, and strong in construction. It is small, can be used repeatedly, has low cost and good effect, and is suitable for large-scale promotion and use.

Description

A junction box for the leakage current test circuit of a frame-type surge arrester

technical field

The utility model belongs to the field of electrical engineering, and relates to a power transmission and transformation project, in particular to a junction box for a leakage current test circuit of a frame-type lightning arrester.

Background technique

At present, in the leakage current test of the arrester installed on the structure, there is a problem that the installation of the arrester is high and the wiring needs to be ascended. During the wiring process, the staff is close to the live part of the upper part of the arrester, which causes a relatively large safety hazard, which not only affects the personal safety of the operator Threats also affect productivity.

Utility model content

The purpose of the utility model is to overcome the deficiencies of the prior art, and provide a junction box for the leakage current test circuit of the frame arrester which is easy to install, easy to operate and high in safety.

The utility model solves the problems of the technologies described above by adopting the following technical solutions:

A frame-type surge arrester leakage current test circuit junction box, which is composed of an insulating box, a metal closed box, a lightning arrester current leakage detection mechanism and a junction box. The lightning arrester current leakage detection mechanism is composed of a lightning arrester insulation base and a counter. The insulation box It is a rectangular cavity structure, and the two metal closed boxes are installed symmetrically and vertically on the lower end of the horizontally arranged insulating box, and the insulating base of the arrester is arranged on the upper end of the insulating box, and the upper end of the insulating base of the arrester is fixed on one side by The bolt is connected with a grounding down-conductor, and the counter is connected through a wire between the grounding down-conductor and the insulating base of the corresponding lightning arrester. The counter is arranged inside the insulating box, and the other end of the grounding lead passes through the metal The closed box is inserted into a junction box arranged in the metal closed box, and is connected with the grounding switch provided in the junction box.

Moreover, there are at least three sets of said lightning arrester leak detection mechanisms, which are arranged at intervals on the upper end surface of said insulating box.

Moreover, the insulating base of the lightning arrester is composed of an insulating base plate, a lightning arrester seat bracket and a metal bracket, the insulating base plate is arranged on the upper end surface of the insulating box, the upper end surface of the insulating base plate is coaxially fixed with the lightning arrester seat bracket, The metal support is fixed coaxially on the base of the lightning arrester, the grounding downconductor is concentrically wound around the metal support, and fixed to one end of the metal support by fixing bolts.

Moreover, a lightning arrester body is installed on the insulating base of the lightning arrester, and the lower diameter of the lightning arrester body is the same as the diameter of the lightning arrester base.

Advantage and beneficial effect of the present utility model are:

1. This device moves the connection part of the arrester resistive current test circuit to the lower part of the arrester structure, adopts a box-type closed structure, realizes the on-site wiring of the staff, and avoids the potential safety hazards caused by climbing wiring during the arrester leakage current test work, ensuring Staff safety.

2. The device is equipped with an insulating base of a lightning arrester on the upper surface of the insulating box. The insulating base of the lightning arrester effectively connects the grounding down-conductor to the grounding switch. At the same time, the junction box of the grounding switch is set in a metal closed box, effectively avoiding the loop connection Poor contact in the process.

3. The counter of this device is set inside the insulating box to avoid damage to the counter by the harsh environment and high-voltage environment, and the test data can be observed quickly and intuitively, which improves the accuracy of the leakage current test of the arrester and greatly improves the work efficiency.

4. The device is simple to install, easy to operate, strong in practicability, low in construction strength, capable of repeated use, low in cost and good in effect, and is suitable for large-scale promotion and use.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is a structural schematic diagram of the insulating base of the arrester in Fig. 1;

FIG. 3 is a diagram of the use state of FIG. 1 .

detailed description

The utility model is described in further detail below through specific examples, the following examples are only descriptive, not limiting, and cannot limit the protection scope of the utility model with this.

A junction box for the leakage current test circuit of a frame-type arrester, which is composed of an insulating box 2, a metal closed box 3, an arrester current leakage detection mechanism and a junction box 4, and the arrester current leakage detection mechanism is composed of an arrester insulation base 1 and a counter 6. The insulating box is a rectangular cavity structure, and the two metal closed boxes are installed symmetrically and vertically at the lower end of the horizontally arranged insulating box, and the insulating base of the lightning arrester is arranged on the upper end of the insulating box, and the insulating base of the lightning arrester is One side of the upper end is connected with a grounding down-conductor 7 through a fixing bolt 8, and the counter 6 is connected through a wire between the grounding down-conductor and the insulating base of the corresponding lightning arrester. The counter is arranged inside the insulating box, and the grounding lead The other end passes through the metal enclosure box and is inserted into a junction box provided in the metal enclosure box, and is connected with the grounding knife switch 5 provided in the junction box. There are at least three sets of said lightning arrester leak detection mechanisms, which are arranged at intervals on the upper end surface of said insulating box.

As shown in Figure 2, the insulating base of the arrester is composed of an insulating base plate 11, an arrester seat holder 10 and a metal bracket 9, the insulating base plate is arranged on the upper end surface of the insulating box, and the upper end surface of the insulating base plate is coaxially fixed There is the lightning arrester seat bracket, the metal bracket is coaxially fixed on the lightning arrester bracket, the grounding down conductor is concentrically wound around the metal bracket, and fixed to one end of the metal bracket by fixing bolts.

As shown in FIG. 3 , an arrester body 12 is installed on the insulating base of the arrester, and the lower diameter of the arrester body is the same as the diameter of the arrester base.

The working principle of the utility model: when in use, the device is erected on the arrester frame, and the lower end of the arrester is installed on the arrester seat bracket of the insulating base of the arrester, and the metal closed box with the grounding switch is located at the lower side of the arrester frame at this time. The grounding copper bar of the lightning arrester is reliably connected to the grounding switch in the metal closed box through the grounding down conductor, and the leakage current test of the lightning arrester is realized through the equipotential connection, so that the test results are intuitively displayed on the counter.

Claims (4)

1. A frame-type surge arrester leakage current test circuit junction box is characterized in that: it is composed of an insulating box, a metal closed box, a surge arrester current leakage detection mechanism and a junction box, and the lightning arrester current leakage detection mechanism is composed of a surge arrester insulation base and a counter , the insulating box is a rectangular cavity structure, and the two metal closed boxes are installed symmetrically and vertically at the lower end of the horizontally arranged insulating box, and the insulating base of the lightning arrester is arranged on the upper end of the insulating box, and the lightning arrester is insulated The upper end of the base is connected with a grounding down-conductor through a fixing bolt, and the counter is connected with a wire between the grounding down-conductor and the insulating base of the corresponding lightning arrester. The counter is arranged inside the insulating box, and the other part of the grounding lead is One end passes through the metal enclosure box and is inserted into a junction box provided in the metal enclosure box, and is connected to the grounding knife switch provided in the junction box. 2. A junction box for the leakage current test circuit of a frame-type surge arrester according to claim 1, characterized in that there are at least three sets of said surge arrester leak detection mechanisms, which are arranged at intervals on the upper end surface of said insulating box. 3. The junction box for the leakage current test circuit of a frame-type arrester according to claim 1, wherein the insulating base of the arrester is composed of an insulating base plate, an arrester seat bracket and a metal bracket, and the insulating base plate is arranged on the The upper end surface of the insulating box, the upper end surface of the insulating base plate is coaxially fixed with the arrester seat bracket, the arrester seat bracket is coaxially fixed with the metal bracket, and the grounding down conductor is concentrically wound through the metal bracket. The bracket is fixed to one end of the metal bracket by fixing bolts. 4. The junction box for the leakage current test circuit of a frame-type arrester according to claim 3, characterized in that: an arrester body is installed on the insulating base of the arrester, and the lower diameter of the arrester body is the same as the diameter of the arrester seat .