CN219039240U - Equipment is to ground output voltage testing arrangement under rain fog environment - Google Patents
Equipment is to ground output voltage testing arrangement under rain fog environment Download PDFInfo
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- CN219039240U CN219039240U CN202223254396.1U CN202223254396U CN219039240U CN 219039240 U CN219039240 U CN 219039240U CN 202223254396 U CN202223254396 U CN 202223254396U CN 219039240 U CN219039240 U CN 219039240U
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Abstract
The utility model discloses a device for testing the output voltage of equipment to the ground in a rain and fog environment. According to the utility model, the test resistor is connected between the voltage output end of the device and the ground in parallel, different weather conditions are simulated by changing the impedance value of the test resistor, and the device output voltage to the ground under different conditions can be obtained through testing.
Description
Technical Field
The utility model relates to the technical field of electrical equipment testing, in particular to a device for testing equipment output voltage to ground in a rain and fog environment.
Background
Equipment with electric shock capability can be deployed at special places according to requirements, so that effective prevention of behavior of illegal entering and exiting a core area is realized. Such devices generally consist of a power supply, a control device, a conductive protective net, and the like. The conductive protection net is arranged on the support through the insulator, is arranged on the periphery of the protection field, keeps a certain output voltage to the ground under normal conditions, and forms an electric path between the conductive protection net and the ground wire when an object touches the conductive protection net of the equipment, so as to strike the object touching the net.
In rainy days, foggy days and other days, the performance of the insulator is reduced, which is equivalent to that a plurality of leakage current paths are connected between the protective net and the ground in parallel, so that the output voltage of the protective net to the ground (namely the voltage to the ground) is greatly reduced, the insulating protection of a touch net object cannot be broken down, the electric shock current flowing through the touch net object is reduced, and the striking effect is seriously influenced.
The current testing method is to connect voltage measuring equipment in parallel between the protective net and the ground for testing, which is equivalent to open circuit testing, as shown in fig. 1, S is an ac high-voltage output device of the conductive protective net, V is an ac voltage testing equipment, and the effective value of open circuit (or equivalent open circuit) ac voltage between the line of the conductive protective net and the ground is tested by V. The method is feasible to measure the output voltage to the ground under normal weather conditions, but the performance of the protective net and the ground insulator is reduced under rain and fog weather conditions, and the protective net and the ground insulator cannot be regarded as an insulating open circuit, so that the numerical condition of the output voltage to the ground under the rain and fog weather conditions cannot be reflected.
In practical applications, it is highly desirable to perform simulation tests on such situations. However, on one hand, when the equipment is installed and put into use, rain and fog are not necessarily generated; on the other hand, because the conductive protective net has higher voltage to the ground (the effective value is several kilovolts), the test is carried out in rainy and foggy days, and great potential safety hazard exists for operators. Therefore, a safe and convenient testing device is needed.
Disclosure of Invention
Aiming at the defects of the prior art, the utility model aims to provide a device for testing the output voltage of equipment to the ground in a rain and fog environment.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
the device for testing the output voltage of the equipment to the ground in the rain and fog environment comprises a protective net alternating-current high-voltage output device, a high-voltage switch, a varistor device and alternating-current voltage testing equipment; the protective net alternating-current high-voltage output device is connected with a high-voltage switch through a tested protective net circuit, the high-voltage switch is connected in series with a resistance changing device, and the resistance changing device is connected between the protective net alternating-current high-voltage output device and the ground; the resistance value of the variable resistance device is adjustable; the alternating voltage testing device is used for measuring the effective voltage value on the variable resistance device.
Further, the resistance value of the resistance variable device R is adjustable within the range of 50kΩ -1 mΩ.
The utility model provides another device for testing the output voltage of equipment to the ground in a rain and fog environment, which comprises a protective net alternating-current high-voltage output device, a total high-voltage switch, a resistor device and alternating-current voltage testing equipment; the protective net alternating current high-voltage output device is connected to the total voltage switch through a tested protective net circuit; the total high-voltage switch is connected in series with a resistor device which is connected between the protective net alternating-current high-voltage output device and the ground; the alternating voltage testing equipment is used for measuring the effective voltage value on the resistor device; the resistor device comprises a plurality of resistors with different resistance values, each resistor is connected in parallel, and each resistor is respectively connected with a high-voltage dividing switch in series.
The utility model has the beneficial effects that: according to the utility model, the test resistor is connected between the voltage output end of the device and the ground in parallel, and different weather conditions can be simulated by changing the impedance value of the test resistor, so that the device output voltage to the ground under different conditions can be obtained through testing.
Drawings
FIG. 1 is a schematic diagram of a conventional protection net-to-ground output voltage test scheme;
fig. 2 is a general schematic diagram of a device for testing output voltage of a device to ground in a rain and fog environment in embodiment 1 of the present utility model;
fig. 3 is a specific schematic diagram of a device for testing a ground output voltage of an apparatus in a rain and fog environment in embodiment 3 of the present utility model.
Detailed Description
The present utility model will be further described with reference to the accompanying drawings, and it should be noted that, while the present embodiment provides a detailed implementation and a specific operation process on the premise of the present technical solution, the protection scope of the present utility model is not limited to the present embodiment.
Example 1
The embodiment provides a device for testing the output voltage of equipment to the ground in a rain and fog environment, which is shown in fig. 2 and comprises a protective net alternating current high-voltage output device S, a high-voltage switch K, a resistance changing device R and alternating current voltage testing equipment V; the protective net alternating current high-voltage output device S is connected to the high-voltage switch K through a tested protective net circuit, the high-voltage switch K is connected in series with the resistance changing device R, and the resistance changing device R is connected between the protective net alternating current high-voltage output device S and the ground; the resistance value of the variable resistance device R is adjustable; the ac voltage testing device V is used to measure the effective value of the voltage across the variable resistor R.
In this embodiment, the resistance of the resistance variable device R is adjustable within a range of 50kΩ to 1mΩ.
Example 2
The embodiment provides a method for testing the output voltage of equipment to ground under a rain and fog environment by using the device described in the embodiment 1, which specifically comprises the following steps:
the resistance value of the resistance variable device R is regulated to simulate loop impedance under different conditions of clear, light or medium rain, heavy fog or heavy rain and heavy fog or heavy rain; when a test is started, the high-voltage switch K is closed, the protective net alternating-current high-voltage output device S outputs high-voltage current, and the high-voltage current flows through a tested protective net circuit, the high-voltage switch K and the resistance changing device R to form a loop with the ground; the alternating-current voltage testing equipment V measures and obtains the effective voltage value on the variable resistance device R; finally, the effective value of the ground output voltage of the protection net under different conditions can be obtained through testing.
Example 3
The embodiment provides another device for testing the output voltage of equipment to the ground in a rain and fog environment, which is shown in fig. 3, and comprises a protective net alternating current high-voltage output device S, a total voltage switch K, a resistor device and alternating current voltage testing equipment V; the protective net alternating current high-voltage output device S is connected to the total high-voltage switch K through a tested protective net line; the total voltage switch K is connected in series with a resistor device, and the resistor device is connected between the protective net alternating current high voltage output device S and the ground; the alternating voltage testing device V is used for measuring the effective voltage value on the resistor device; the resistor device comprises a plurality of resistors with different resistance values, each resistor is connected in parallel, and each resistor is respectively connected with a high-voltage dividing switch in series. As shown in fig. 3, the varistor device R includes 1mΩ noninductive resistor R1 and 100kΩ noninductive resistor R2, and the 1mΩ noninductive resistor and the 100kΩ noninductive resistor are connected in parallel, and are connected in series with the high-voltage-dividing switches K1 and K2, respectively.
Example 4
The embodiment provides a method for testing the output voltage of equipment to ground under a rain and fog environment by using the device described in the embodiment 3, which specifically comprises the following steps:
the different resistances of the resistance device respectively correspond to loop impedance under different conditions, wherein the conditions comprise more than two of clear, light or medium rain, heavy fog or heavy rain, strong heavy fog or heavy storm; when a test is started, closing a high-voltage dividing switch which is formed by connecting a total high-voltage switch K and a resistor corresponding to a condition to be simulated in series; the protective net alternating current high-voltage output device S outputs high-voltage current, and the high-voltage current flows through a tested protective net circuit, the total high-voltage switch K, the high-voltage switch and the resistor to form a loop with the ground; the alternating-current voltage testing equipment V measures and obtains the voltage effective value on the resistor, so as to obtain the effective value of the voltage of the tested protective net to the ground under the corresponding condition; finally, the effective value of the ground output voltage of the protection net under different conditions can be obtained through testing.
Example 5
The embodiment provides an example of testing the output voltage of equipment to the ground in a rain and fog environment, and the device is shown in fig. 3.
Test time: 2022-5-18; location: beijing city sea lake area, weather: sunny and 28 ℃ and 46% of humidity; model of device under test: ZDSS-5; test device: TBS1052B oscilloscope, P6015A high-voltage probe, 1MΩ noninductive resistor (R1), 100kΩ noninductive resistor (R2), clip, high-voltage switch (K, K1, K2), etc. The TBS1052B oscilloscope and the P6015A high-voltage probe form alternating-current voltage testing equipment.
The effective value of the ground output voltage of the tested protective net is tested according to the following steps:
a) Disconnecting K;
b) R1 is 6mm by 2 The copper wire is connected between the protective net alternating current high-voltage output device S and the ground;
c) The primary side of the high-voltage probe is connected to two ends of R1 in parallel, the secondary side of the high-voltage probe is connected to an oscilloscope, and K2 is disconnected;
d) Closing K, K;
e) Reading a voltage instantaneous value through an oscilloscope, converting the voltage instantaneous value into an effective value, wherein the effective value is an effective value of the voltage output to the ground by a protective net in sunny weather, and the effective value is 5304V;
f) Disconnection K, K;
g) Closing K2, R2 by 6mm 2 The copper wire is connected between the alternating current high-voltage output device S of the protective net and the ground, the primary side of the high-voltage probe is connected in parallel with the two ends of R2, and the secondary side of the high-voltage probe is connected into the oscilloscope;
h) K is closed, the instantaneous value of the voltage is read through an oscilloscope and converted into an effective value, the effective value of the voltage is output to the ground by the protective net in light rain or medium rain weather, and the effective value is 5230V. The deviation between the test result and the ground output voltage of the protective net in sunny weather is-1.4 percent, and the test result has no obvious drop.
Example 6
The embodiment provides another example of testing the output voltage of equipment to the ground in a rain and fog environment, and the used testing device is the same as that of the embodiment 5.
Test time: 2022-3-10; location: the Shandong province Jinan City; weather: sunny, 21 ℃, 41%; model of device under test: RDDW-VII; test device: TBS1052B oscilloscope, P6015A high-voltage probe, 1MΩ noninductive resistor (R1), 100kΩ noninductive resistor (R2), clip, high-voltage switch (K, K1, K2), etc.
The device output voltage to ground effective value is tested according to the following steps:
a) Disconnecting K;
b) R1 is 6mm by 2 The copper wire is connected between the protective net alternating current high-voltage output device S and the ground;
c) The primary side of the high-voltage probe is connected to two ends of R1 in parallel, the secondary side of the high-voltage probe is connected to an oscilloscope, and K2 is disconnected;
d) Closing K, K;
e) Reading a voltage instantaneous value through an oscilloscope, and converting the voltage instantaneous value into an effective value, wherein the effective value is an effective value of the voltage output to the ground by a protective net in sunny weather, and the effective value is 5100V;
f) Disconnection K, K;
g) Closing K2, R2 by 6mm 2 The copper wire is connected between the alternating current high-voltage output device S of the protective net and the ground, the primary side of the high-voltage probe is connected in parallel with the two ends of R2, and the secondary side of the high-voltage probe is connected into the oscilloscope;
h) K is closed, the instantaneous value of the voltage is read through an oscilloscope and converted into an effective value, the effective value of the voltage is output to the ground by the protective net in light rain or medium rain weather, and the effective value is 4038V. The deviation between the test result and the ground output voltage of the protective net in sunny weather is-20.8%, and the drop is obvious.
Various modifications and variations of the present utility model will be apparent to those skilled in the art in light of the foregoing teachings and are intended to be included within the scope of the following claims.
Claims (3)
1. The device for testing the output voltage of the equipment to the ground in the rain and fog environment is characterized by comprising a protective net alternating-current high-voltage output device, a high-voltage switch, a varistor device and alternating-current voltage testing equipment; the protective net alternating-current high-voltage output device is connected with a high-voltage switch through a tested protective net circuit, the high-voltage switch is connected in series with a resistance changing device, and the resistance changing device is connected between the protective net alternating-current high-voltage output device and the ground; the resistance value of the variable resistance device is adjustable; the alternating voltage testing device is used for measuring the effective voltage value on the variable resistance device.
2. The device for testing the output voltage of equipment to the ground in a rain and fog environment according to claim 1, wherein the resistance value of the resistance changing device R is adjustable within the range of 50k omega-1M omega.
3. The device for testing the output voltage of the equipment to the ground in the rain and fog environment is characterized by comprising a protective net alternating-current high-voltage output device, a total high-voltage switch, a resistor device and alternating-current voltage testing equipment; the protective net alternating current high-voltage output device is connected to the total voltage switch through a tested protective net circuit; the total high-voltage switch is connected in series with a resistor device which is connected between the protective net alternating-current high-voltage output device and the ground; the alternating voltage testing equipment is used for measuring the effective voltage value on the resistor device; the resistor device comprises a plurality of resistors with different resistance values, each resistor is connected in parallel, and each resistor is respectively connected with a high-voltage dividing switch in series.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223254396.1U CN219039240U (en) | 2022-12-06 | 2022-12-06 | Equipment is to ground output voltage testing arrangement under rain fog environment |
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| CN202223254396.1U CN219039240U (en) | 2022-12-06 | 2022-12-06 | Equipment is to ground output voltage testing arrangement under rain fog environment |
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| CN219039240U true CN219039240U (en) | 2023-05-16 |
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| CN202223254396.1U Active CN219039240U (en) | 2022-12-06 | 2022-12-06 | Equipment is to ground output voltage testing arrangement under rain fog environment |
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