CN203705486U - 500kV zinc-oxide lightning-arrester dc tester - Google Patents

Abstract

The utility model discloses a 500kV zinc oxide lightning arrester DC test device, which is characterized in that it comprises a lightning arrester (1), an insulating base, and a foldable test support, the lightning arrester is fixedly connected to the center of the insulating base, and the insulating base is connected to the center of the insulating base. The test stand is detachably connected. Compared with the prior art, the utility model has simple structure and strong operability, can accurately measure the U _1mA of the second section without removing the lead wire, reduces the times of high-altitude wiring, and reduces the safety risk of workers. The overall height of the supporting device is 150cm, which is the same as the height of the DC high voltage generator, which can effectively reduce the capacitance current to the ground and ensure the accuracy of the test. The device also has the characteristics of simple assembly and disassembly, and convenient portability, which can effectively improve work efficiency.

Description

500kV zinc oxide arrester DC test device

technical field

The utility model relates to a test device for a zinc oxide arrester, in particular to a direct current test device for a 500kV zinc oxide arrester. the

Background technique

Surge arrester is an important overvoltage protection device in the power system, which is related to the safe and stable power supply of the power system. DC 1mA voltage (U _1mA ) and 0.75U _1mA leakage current test are important items in routine tests of zinc oxide arresters. 500kV zinc oxide arresters are generally three-section stacked in series. "Test Regulations for Condition Maintenance of Power Transmission and Transformation Equipment" (DL/T393-2010) stipulates that it should be tested section by section. 500kV equipment has a large lead wire diameter and relatively heavy connector accessories. To remove and connect the primary lead wire of the arrester, cranes and elevators are required, which consumes a lot of manpower and material resources and requires a long power outage time. Therefore, the routine test of zinc oxide arresters generally adopts the method of not removing the lead wires.

"Guidelines for the Implementation of Field Insulation Test-Surge Arrester Test" (DL/T474.5-2006) proposes a test method without removing the lead wire, that is, using a support resistor or a 10kV arrester to connect to the end of the third section, and measuring the second section of the arrester The method of DC 1mA reference voltage, but no test device is proposed, and the field implementation is not strong. the

Contents of the invention

The purpose of this utility model is to overcome the deficiencies of the prior art, to provide a test device that uses a 10kV arrester as a support, and adopts the method of connecting the 10kV arrester at the end of the third arrester, that is, connecting the device to the third arrester end, in order to realize the measurement of the DC 1mA reference voltage of the second section of the 500kV zinc oxide arrester. the

The present invention solves technical problem and adopts following technical scheme:

The 500kV zinc oxide surge arrester DC test device is characterized in that it includes a surge arrester, an insulating base and a foldable test support, the arrester is fixedly connected to the center of the insulating base, and the insulating base is detachably connected to the test support. the

The structural features of the present invention are also in:

The test support includes a pair of parallel horizontal insulating rods, each of the horizontal insulating rods is provided with a pair of vertical insulating rods, and adjacent vertical insulating rods on different horizontal insulating rods are connected by movable links, The movable connecting rod is rotatably connected with the vertical insulating rod. the

The insulating base is composed of an upper insulating base for fixing the lightning arrester and a lower insulating base for the microammeter, and both the upper insulating base and the lower insulating base are detachably connected with the test support. the

The top of the test bracket is provided with a plug-in hole, and the bottom of the upper insulating base is provided with a plug-in block matched with the plug-in hole. the

The lower insulating base is provided with a connecting through hole, and the connecting through hole passes through the vertical insulating rod of the test stand, and is positioned and fixed by the stop protrusion provided on the vertical insulating rod. the

The side end of one of the horizontal insulating rods is provided with rollers. the

Handles are provided on the two vertical insulating rods on the horizontal insulating rod provided with rollers. the

Compared with the prior art, the utility model has simple structure and strong operability, can accurately measure the U _1mA of the second section without removing the lead wire, reduces the times of high-altitude wiring, and reduces the safety risk of workers. The overall height of the supporting device is 150cm, which is the same as the height of the DC high voltage generator, which can effectively reduce the capacitance current to the ground and ensure the accuracy of the test. The device also has the characteristics of simple assembly and disassembly, and convenient portability, which can effectively improve work efficiency.

Description of drawings

Fig. 1 is a schematic diagram of the structure of the utility model. the

Fig. 2 is a schematic diagram of the structure of the test bracket of the present invention. the

Fig. 3 is a schematic diagram of the connection structure between the upper insulating base and the lightning arrester of the utility model. the

Fig. 4 is a schematic diagram of the structure of the lower insulating base of the utility model. the

Labels in the figure: 1 lightning arrester, 21 upper insulating base, 211 socket block, 22 lower insulating base, 3 test support, 31 vertical insulating rod, 32 horizontal insulating rod, 33 socket hole, 34 stop protrusion, 4 movable connection Rod, 5 rollers, 6 handles, 7 microampere. the

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described in further detail. the

As shown in the figure, the 500kV zinc oxide arrester DC test device includes arrester 1, insulating base and foldable test support 3, the arrester is fixedly connected to the center of the insulating base, and the insulating base is detachably connected to the test support 3. the

As shown in Figure 2, the test support 3 comprises a pair of parallel horizontal insulating rods 32, each horizontal insulating rod 32 is provided with a pair of vertical insulating rods 31, positioned between adjacent vertical insulating rods 31 on different horizontal insulating rods Connected by the movable connecting rod 4, the movable connecting rod 4 is rotationally connected with the vertical insulating rod 31. the

The insulating base is composed of an upper insulating base 21 for fixing the lightning arrester and a lower insulating base 22 for fixing the microammeter. The connection is disassembled, and the lower insulating base 22 is connected and fixed through the connector connected to the bottom of the insulating base 21 . the

As shown in the figure, the detachable method of the upper insulating base 21 and the test bracket is as follows: the top of the test bracket is provided with an insertion hole 33 , and the bottom of the upper insulating base 21 is provided with an insertion block 211 that matches the insertion hole 33 . the

The detachable mode of the lower insulating support 22 and the test support is that the lower insulating base 22 is provided with a connection through hole 221, and the connection through hole 221 passes through the vertical insulating rod of the test support, and passes through the stop protrusion provided on the vertical insulating rod. 34 positioning is fixed. the

In order to facilitate the movement of the test stand after being folded, a roller 5 is provided at the side end of one of the horizontal insulating rods 32; handles 6 are provided on the two vertical insulating rods on the horizontal insulating rod provided with rollers. the

The utility model adopts the method of supporting at the end. When using the utility model, the U _1mA of the second section can be accurately tested, the number of high-altitude wiring is reduced, and the safety risk of the staff is reduced. The overall height of the utility model is 150cm, which is the same as the height of the DC high-voltage generator, which can effectively reduce the capacitance current to the ground and ensure the accuracy of the test. The utility model also has the characteristics of simple assembly and disassembly and convenient portability, and can effectively improve work efficiency.

Claims (6)

1. A 500kV zinc oxide surge arrester DC test device is characterized in that it comprises a surge arrester (1), an insulating base and a foldable test support, the arrester is fixedly connected to the center of the insulating base, and the insulating base is detachably connected to the test support; Said test support comprises a pair of parallel horizontal insulating rods (32), said each horizontal insulating rod (32) is provided with a pair of vertical insulating rods (31), and the adjacent vertical insulating rods positioned on different horizontal insulating rods (31) are connected by a movable connecting rod (4), and the movable connecting rod (4) is rotationally connected with the vertical insulating rod (31). the 2. 500kV zinc oxide surge arrester DC test device according to claim 1, is characterized in that, described insulating base is made up of the upper insulating base (21) of fixing arrester and the lower insulating base (22) of fixing microammeter, so Both the upper insulating base (21) and the lower insulating base (22) are detachably connected to the test support (3). the 3. The 500kV zinc oxide surge arrester DC test device according to claim 2, characterized in that, the top of the test bracket is provided with a plug-in hole (33), and the bottom of the upper insulating base (21) is provided with a plug-in hole (33) mating socket block (211). the 4. 500kV zinc oxide surge arrester DC test device according to claim 2, is characterized in that, described lower insulation base (22) is provided with connection through hole (221), and described connection through hole (221) passes test support The vertical insulating rod is positioned and fixed by the stop protrusion provided on the vertical insulating rod. the 5. The 500kV zinc oxide surge arrester DC test device according to claim 1, wherein a roller (5) is provided at the side end of one of the horizontal insulating rods (32). the 6. The 500kV zinc oxide surge arrester DC test device according to claim 5, characterized in that handles (6) are provided on the two vertical insulating bars on the horizontal insulating bar provided with rollers. the