CN104931737A - Portable 10 kV lightning arrester testing stand - Google Patents

Abstract

A portable 10kV arrester test bench, comprising a base and a bracket, characterized in that the base is an insulator commonly used in power systems including iron caps and disks, the bracket is an iron square tube, and the lower surface of the iron square tube is The middle part is welded together with the upper end of the iron cap. Three fixing holes are equidistantly opened on the upper surface of the iron square tube, and three positioning nuts matching the studs of the lightning arrester are welded above the fixing holes, and drilled on the outer wall of the iron cap. Set threaded holes and cooperate with setting common grounding bolts. Compared with the prior art, the present invention is portable, convenient and practical, can place three lightning arresters at one time, improves work efficiency and uses waste electric equipment as materials, which is convenient to obtain materials, low in cost, stable in center of gravity, and insulated from the ground in line with electric safety work rules.

Description

Portable 10kV surge arrester test bench

technical field

The invention relates to a test appliance, in particular to a portable 10kV arrester test stand.

Background technique

In the actual maintenance test on site, when measuring the leakage current of a 10kV arrester under the DC reference voltage U1mA and 0.75 times U1mA, since the 10kV arrester needs to carry a very high voltage during the test, it is necessary to place the 10kV arrester vertically and fixedly. For the measurement of power frequency reference voltage and continuous current, the 10kV surge arrester needs to be placed vertically and insulated from the ground. When doing AC tests, the base of the arrester itself is not directly grounded, but needs to be supported by insulation. However, after the 10kV arrester is dismantled, because the upper and lower parts are screw structures, the 10kV arrester itself cannot be fixed. Instruments or other things are often used to support the 10kV arrester, which often causes the arrester to be unstable or broken during the test, which brings great harm to the test personnel and work. Dangerous, affecting work efficiency, and a single 10kV surge arrester cannot be insulated from the ground. Therefore, a kind of test bench is needed, and this kind of test bench needs to meet the following technical requirements: 1. Control the quality and volume to satisfy its portable, convenient and practical characteristics. 2. There is a certain structure to ensure the uprightness of the arrester and a certain safety distance to the ground. 3. Use metal material as the bracket, and set up a dedicated grounding terminal, so as to ensure good contact between the tested product and the ground grid. The Chinese utility model whose publication number is CN203941195U relates to a 10kV arrester test base, which is provided with an insulating mounting plate. The center of the insulating mounting plate is provided with a lightning arrester placement hole, and the bottom of the insulating mounting plate is provided with a vertical support frame. The 10kV arrester Put one end of the arrester into the arrester placement hole in the center of the insulating mounting plate and place the 10kV arrester vertically. Although this patent can reliably fix the lightning arrester and at the same time reliably insulate the lightning arrester base, it can reliably fix the lightning arrester while reliably grounding the lightning arrester base. But there are still some defects: on the one hand, only one arrester can be tested at a time, on the other hand, the cost of the insulating mounting plate is relatively high, and the structure of the Chinese device is relatively complicated.

Contents of the invention

In view of the defects in the prior art and the actual needs of the arrester test, the invention provides a novel portable 10kV arrester test stand.

The technical scheme disclosed by the invention is:

This portable 10kV arrester test bench includes a base 4 and a support 2, and is characterized in that the base 4 is an insulator commonly used in power systems including an iron cap 41 and a magnetic disk 42, and the support 2 is an iron square tube. The middle part of the lower surface of the quality square tube is welded together with the upper end of the iron cap 41, and three fixing holes are equidistantly opened on the upper surface of the iron square tube, and three positioning nuts matching the studs of the 10kV arrester are welded above the fixing holes 1. Drill threaded holes on the outer wall of the iron cap 41 and set the common grounding bolt 3 together.

Further, the three positioning nuts 1 are painted in red, yellow and green respectively to distinguish the tested products.

Further, the insulator described is a common disc-shaped suspension insulator.

Further, the insulator described above is a bell jar type disc suspension insulator.

Further, the insulator is a pollution-resistant suspension type porcelain insulator.

Further, the insulator is a double-umbrella pollution-resistant suspension porcelain insulator.

Further, the insulator is a three-umbrella pollution-resistant suspension porcelain insulator.

Compared with prior art, the present invention has following characteristics:

1. Portable, convenient and practical. 2. Three arresters can be placed at one time, which can effectively improve the working efficiency of 10kV arrester test. 3. It can solve the irregular behaviors existing in the field test process of the arrester, and can complete the test task conveniently. 4. Set up a dedicated public ground terminal for reliable discharge processing. 5. Using waste electric equipment as materials, it is convenient to obtain materials, low in cost, stable in center of gravity, and the level of insulation from the ground complies with the regulations on electric safety work.

Description of drawings

FIG. 1 is a schematic structural diagram of Embodiment 1.

FIG. 2 is a structural schematic diagram of Embodiment 1 from another perspective.

Detailed ways

Embodiment 1, see Figure 1-2.

This portable 10kV surge arrester test bench includes a base 4 and a bracket 2, which is characterized in that the base 4 is a three-umbrella pollution-resistant suspension porcelain insulator including an iron cap 41 and a magnetic disk 42 commonly used in power systems, and the bracket 2 is an iron square pipe, the middle part of the lower surface of the iron square pipe is welded together with the upper end of the iron cap 41, and three fixing holes are equidistantly opened on the upper surface of the iron square pipe, and three are welded above the fixing holes with 10kV The positioning nuts 1 that match the lightning arrester studs, and the three positioning nuts 1 are painted red, yellow, and green respectively to distinguish the tested product. A threaded hole is drilled on the outer wall of the iron cap 41 and a common grounding bolt 3 is provided in conjunction with it.

Use a porcelain disc-shaped insulator as the base to make the center of gravity of the support stable, and the level of insulation from the ground complies with the regulations on electrical safety work; use a section of metal square tube as the support, and open three fixing holes equidistantly on the metal square tube. And weld three nuts matching the studs of the 10kV arrester above the fixing hole, weld the processed square tube on the base, after welding, weld a stud above the base, and use this stud as the test The common ground terminal of the bracket. In the actual application process, the lightning arrester is placed on the bracket. Since the bracket and the lightning arrester are connected by screws, the reliable connection between the lightning arrester and the bracket is guaranteed; usually, a group of three lightning arresters is placed on the bracket at one time, reducing the need for replacement. Line time, which can improve work efficiency; set up a special public ground terminal, the support can be reliably connected to the ground network through the ground wire during field application, to ensure that the residual current flows into the ground. It enables the test personnel to conveniently and quickly complete the placement of the 10kV arrester, prevent the arrester from toppling during the test, and complete the test work in a safe and standardized manner.

Claims (7)

1.10kV arrester test bed, comprise base (4), support (2), it is characterized in that the insulator comprising chapeau de fer (41) and disk (42) that described base (4) is commonly used for electric system, described support (2) is irony square tube, weld together with the upper end of chapeau de fer (41) in the middle part of the lower surface of irony square tube, the upper surface of irony square tube is equidistantly opened three fixed orifices and weld three setscrew nuts (1) matched with 10kV lightning arrester stud above fixed orifice, the outer wall of chapeau de fer (41) is drilled with threaded hole and is equipped with common ground bolt (3).

2. 10kV according to claim 1 is arrester test bed, it is characterized in that: three described setscrew nuts (1) are coated with red, yellow, and green look respectively so that distinguish test specimen.

3. 10kV according to claim 1 is arrester test bed, it is characterized in that: described insulator is plain edition cap and pin type suspension insulator.

4. 10kV according to claim 1 is arrester test bed, it is characterized in that: described insulator is bell-shaped cap and pin type suspension insulator.

5. 10kV according to claim 1 is arrester test bed, it is characterized in that: described insulator is resistant suspended porcelain insulator.

6. 10kV according to claim 1 is arrester test bed, it is characterized in that: described insulator is two umbellate form resistant suspended porcelain insulator.

7. 10kV according to claim 1 is arrester test bed, it is characterized in that: described insulator is three umbellate form resistant suspended porcelain insulators.