CN219039240U - Equipment is to ground output voltage testing arrangement under rain fog environment - Google Patents

Abstract

The utility model discloses an equipment-to-earth output voltage testing device in a rainy and foggy environment. The device comprises a protective net AC high-voltage output device, a high-voltage switch, a variable resistance device/resistance device and an AC voltage testing device. The utility model simulates different weather conditions by connecting the test resistor between the voltage output terminal of the device and the ground in parallel, and changes the impedance value of the test resistor, so that the device can obtain the output voltage of the device to the ground under different conditions through testing.

Description

A device for testing the output voltage of equipment to ground in a rainy and foggy environment

technical field

The utility model relates to the technical field of electrical equipment testing, in particular to an equipment-to-earth output voltage testing device in a rainy and foggy environment.

Background technique

In special places, equipment with electric shock capabilities will be deployed as needed to effectively prevent illegal entry and exit of core areas. Such equipment is generally composed of power supply, control device, conductive protective net and so on. The conductive protective net is installed on the bracket through insulators and arranged around the perimeter of the protection site. Under normal circumstances, a certain output voltage is maintained to the ground. When an object touches the conductive protective net of the equipment, an electrical path is formed between the conductive protective net and the ground wire to realize A blow to an object that touches the net.

In rain, fog and other weather, the performance of the insulator is reduced, which is equivalent to multiple leakage current paths connected in parallel between the protective net and the ground, causing the output voltage of the protective net to the ground (that is, the voltage to the ground) to drop greatly, and it is impossible to break down the object that touches the net. Insulation protection, and the electric shock current flowing through the object touching the net is reduced, which seriously affects the striking effect.

The current test method is to connect the voltage measurement equipment between the protective net and the ground for testing, which is equivalent to an open circuit test. As shown in Figure 1, S is the AC high-voltage output device of the conductive protective net, and V is the AC voltage testing equipment. Test the effective value of the open circuit (or equivalent open circuit) AC voltage between the conductive protective net line and the ground. This method is feasible to measure the output voltage to ground under normal weather conditions. However, in rainy and foggy weather, the performance of the protective net and the ground insulator is reduced, which cannot be regarded as an insulation open circuit, so it cannot reflect the grounding voltage in rainy and foggy weather. The value of the output voltage.

In practical applications, it is urgent to carry out simulation tests for this situation. However, on the one hand, when the equipment is installed and put into use, there may not be rainy or foggy weather; on the other hand, due to the high voltage of the conductive protective net to the ground (the effective value is thousands of volts), the test is carried out in rainy and foggy weather. There are great security risks for personnel. Therefore, a safe and convenient testing device is needed.

Utility model content

Aiming at the deficiencies of the prior art, the utility model aims to provide a device for testing the ground output voltage of equipment in a rainy and foggy environment.

In order to achieve the above object, the utility model adopts the following technical solutions:

A device for testing the ground output voltage of equipment in a rainy and foggy environment, comprising a protective net AC high-voltage output device, a high-voltage switch, a rheostat device, and an AC voltage testing device; the protective net AC high-voltage output device is connected to the high-voltage switch, the high-voltage switch is connected in series with the rheostat device, and the rheostat device is connected between the AC high-voltage output device of the protective net and the ground; the resistance value of the rheostat device is adjustable; the AC voltage testing equipment is used to measure the rheostat device The effective value of the voltage on.

Further, the resistance value of the rheostat device R is adjustable within the range of 50kΩ-1MΩ.

The utility model provides another equipment-to-earth output voltage testing device in a rainy and foggy environment, which includes a protective net AC high-voltage output device, a total high-voltage switch, a resistance device and an AC voltage testing device; the protective net AC high-voltage output device passes through the protected The network line is connected to the total high-voltage switch; the total high-voltage switch is connected in series to the resistance device, and the resistance device is connected between the AC high-voltage output device of the protective net and the ground; the AC voltage testing equipment is used to measure the effective value of the voltage on the resistance device ; The resistor device includes a plurality of resistors with different resistance values, each resistor is connected in parallel, and each resistor is respectively connected in series with a high voltage divider switch.

The beneficial effect of the utility model is that: the utility model can simulate different weather conditions by changing the impedance value of the test resistor by connecting the test resistor between the voltage output terminal of the equipment and the ground, so that the equipment under different conditions can be obtained through testing. output voltage to ground.

Description of drawings

Figure 1 is a schematic diagram of an existing protective net-to-ground output voltage test scheme;

Fig. 2 is the overall schematic diagram of the equipment-to-earth output voltage testing device under the rain and fog environment in Embodiment 1 of the utility model;

Fig. 3 is a specific schematic diagram of the device for testing the output voltage of the equipment to the ground in a rainy and foggy environment in Example 3 of the present utility model.

Detailed ways

The utility model will be further described below in conjunction with the accompanying drawings. It should be noted that the present embodiment is based on the technical solution and provides detailed implementation and specific operation process, but the protection scope of the utility model does not limited to this example.

Example 1

The present embodiment provides a device-to-ground output voltage testing device in a rainy and foggy environment, as shown in FIG. The network AC high-voltage output device S is connected to the high-voltage switch K through the protected network line under test, and the high-voltage switch K is connected in series with the rheostat device R, and the rheostat device R is connected between the protective network AC high-voltage output device S and the ground ; The resistance of the rheostat device R is adjustable; the AC voltage testing equipment V is used to measure the effective value of the voltage on the rheostat device R.

In this embodiment, the resistance of the rheostat device R is adjustable within the range of 50 kΩ˜1 MΩ.

Example 2

This embodiment provides a method for testing the output voltage of equipment to ground in a rainy and foggy environment using the device described in Embodiment 1. The specific process is as follows:

By adjusting the resistance of the rheostat device R, the circuit impedance under different conditions of sunshine, light rain or moderate rain, heavy fog or heavy rain, dense fog or heavy rain, strong dense fog or heavy rain can be simulated; when starting the test, close the high-voltage switch K, The protective net AC high-voltage output device S outputs high-voltage current, and the high-voltage current forms a loop with the ground after passing through the tested protective net line, high-voltage switch K, and rheostat device R; the effective value of the voltage on the rheostat device R is obtained by measuring the AC voltage test device V ; Finally, it can be tested to obtain the effective value of the output voltage of the protective net to the ground under different conditions.

Example 3

The present embodiment provides another device-to-ground output voltage testing device in a rainy and foggy environment, as shown in Figure 3, including a protective net AC high-voltage output device S, a total high-voltage switch K, a resistance device and an AC voltage testing device V; The network AC high-voltage output device S is connected to the main high-voltage switch K through the tested protective network line; the general high-voltage switch K is connected in series with a resistance device, and the resistance device is connected between the protective network AC high-voltage output device S and the ground; The voltage testing device V is used to measure the effective value of the voltage on the resistance device; the resistance device includes a plurality of resistors with different resistance values, each resistor is connected in parallel, and each resistor is respectively connected in series with a high voltage dividing switch. As shown in Figure 3, the rheostat device R includes a 1MΩ non-inductive resistor R1 and a 100kΩ non-inductive resistor R2, the 1MΩ non-inductive resistor and the 100kΩ non-inductive resistor are connected in parallel, and the high-voltage switches K1 and K2 are respectively connected in series.

Example 4

This embodiment provides a method for testing the output voltage of equipment to ground in a rainy and foggy environment using the device described in Embodiment 3. The specific process is as follows:

The different resistances of the resistance device correspond to the loop impedance of different conditions respectively, and the conditions include two or more of sunny weather, light rain or moderate rain, heavy fog or heavy rain, dense fog or heavy rain, strong dense fog or heavy rain; when starting the test, close The main high-voltage switch K and the sub-high-voltage switch connected in series with the resistance corresponding to the conditions to be simulated; the protective net AC high-voltage output device S outputs high-voltage current, and the high-voltage current passes through the tested protective net line, the main high-voltage switch K, the sub-high voltage switch and the resistor. It forms a loop with the ground; the AC voltage test equipment V measures the effective value of the voltage on the resistor, so as to obtain the effective value of the output voltage of the protective net to the ground under the corresponding conditions; finally, it can be tested to obtain the effective output voltage of the protective net to the ground under different conditions value.

Example 5

This embodiment provides an example of testing the output voltage of equipment to ground in a rainy and foggy environment, using the device shown in FIG. 3 .

Test time: 2022-5-18; location: Haidian District, Beijing, weather: sunny, 28°C, humidity 46%; tested equipment model: ZDSS-5; test device: TBS1052B oscilloscope, P6015A high voltage probe, 1MΩ non-inductive resistor (R1), 100kΩ non-inductive resistor (R2), clip, high voltage switch (K, K1, K2), etc. TBS1052B oscilloscope and P6015A high voltage probe form the AC voltage testing equipment.

Test the effective value of the ground output voltage of the protective net under test as follows:

a) Disconnect K;

b) R1 is connected between the protective net AC high-voltage output device S and the ground through a 6mm ² copper wire;

c) Connect the primary side of the high-voltage probe to both ends of R1, connect the secondary side of the high-voltage probe to the oscilloscope, and disconnect K2;

d) Close K and K1;

e) Read the instantaneous value of the voltage through the oscilloscope and convert it into an effective value. This is the effective value of the output voltage of the protective net to the ground in sunny weather, and the value is 5304V;

f) disconnect K, K1;

g) Close K2, R2 is connected between the protective net AC high-voltage output device S and the ground through a 6mm ² copper wire, connect the primary side of the high-voltage probe to both ends of R2, and connect the secondary side of the high-voltage probe to the oscilloscope;

h) Turn on K, read the instantaneous value of the voltage through the oscilloscope, and convert it into an effective value. This is the effective value of the output voltage of the protective net to the ground in light rain or moderate rain, and the value is 5230V. The deviation between the test result and the output voltage of the protective net to the ground in sunny weather is -1.4%, and there is no obvious drop.

Example 6

This embodiment provides another example of testing the output voltage of the equipment to the ground in a rainy and foggy environment, and the test device used is the same as that of Embodiment 5.

Test time: 2022-3-10; location: Jinan City, Shandong Province; weather: sunny, 21°C, 41%; tested equipment model: RDDW-VII; test device: TBS1052B oscilloscope, P6015A high voltage probe, 1MΩ non-inductive resistor ( R1), 100kΩ non-inductive resistor (R2), clip, high voltage switch (K, K1, K2), etc.

Follow the steps below to test the effective value of the output voltage of the device to ground:

a) Disconnect K;

b) R1 is connected between the protective net AC high-voltage output device S and the ground through a 6mm ² copper wire;

c) Connect the primary side of the high-voltage probe to both ends of R1, connect the secondary side of the high-voltage probe to the oscilloscope, and disconnect K2;

d) Close K and K1;

e) Read the instantaneous value of the voltage through an oscilloscope and convert it into an effective value. This is the effective value of the output voltage of the protective net to the ground in sunny weather, and the value is 5100V;

f) disconnect K, K1;

g) Close K2, R2 is connected between the protective net AC high-voltage output device S and the ground through a 6mm ² copper wire, connect the primary side of the high-voltage probe to both ends of R2, and connect the secondary side of the high-voltage probe to the oscilloscope;

h) Turn on K, read the instantaneous value of the voltage through the oscilloscope, and convert it into an effective value. This is the effective value of the output voltage of the protective net to the ground in light rain or moderate rain, and the value is 4038V. The difference between the test result and the output voltage of the protective net to the ground in sunny weather is -20.8%, which is a significant drop.

For those skilled in the art, various corresponding changes and modifications can be made according to the above technical solutions and ideas, and all these changes and modifications should be included within the protection scope of the claims of the present utility model .

Claims (3)

1. Under a rainy and foggy environment, equipment is characterized in that it includes a protective net AC high-voltage output device, a high-voltage switch, a rheostat device and an AC voltage testing device; the protective net AC high-voltage output device passes through the The protective net line is connected to the high-voltage switch, and the high-voltage switch is connected in series with the rheostat device, and the rheostat device is connected between the AC high-voltage output device of the protective net and the ground; the resistance value of the rheostat device is adjustable; the AC voltage testing equipment Used to measure the effective value of the voltage on the rheostat device. 2 . The device for testing the ground output voltage of equipment in a rainy and foggy environment according to claim 1 , wherein the resistance of the rheostat device R is adjustable within the range of 50kΩ-1MΩ. 3. An equipment-to-earth output voltage testing device in a rainy and foggy environment, characterized in that it includes a protective net AC high-voltage output device, a total high-voltage switch, a resistance device and an AC voltage testing device; the protective net AC high-voltage output device passes through the tested The protective net line is connected to the main high-voltage switch; the main high-voltage switch is connected in series to the resistance device, and the resistance device is connected between the AC high-voltage output device of the protective net and the ground; the AC voltage testing equipment is used to measure the effective voltage on the resistance device value; the resistor device includes a plurality of resistors with different resistance values, each resistor is connected in parallel, and each resistor is respectively connected in series with a high voltage divider switch.

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