CN214703761U - Electrical device for detecting residual voltage of equipment to be tested - Google Patents
Electrical device for detecting residual voltage of equipment to be tested Download PDFInfo
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- CN214703761U CN214703761U CN202120937292.7U CN202120937292U CN214703761U CN 214703761 U CN214703761 U CN 214703761U CN 202120937292 U CN202120937292 U CN 202120937292U CN 214703761 U CN214703761 U CN 214703761U
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- 238000012360 testing method Methods 0.000 claims abstract description 37
- 230000007935 neutral effect Effects 0.000 claims description 37
- 239000011159 matrix material Substances 0.000 claims description 27
- 238000010586 diagram Methods 0.000 claims description 21
- 239000011888 foil Substances 0.000 claims description 15
- 238000001514 detection method Methods 0.000 claims description 12
- 229910052751 metal Inorganic materials 0.000 claims description 12
- 239000002184 metal Substances 0.000 claims description 12
- 238000005259 measurement Methods 0.000 claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 239000011889 copper foil Substances 0.000 claims description 3
- 238000004891 communication Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 238000007689 inspection Methods 0.000 description 5
- 239000003990 capacitor Substances 0.000 description 4
- 230000036962 time dependent Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Abstract
The utility model describes an electrical device for detecting residual voltage, which comprises a power line, an on-off device, a power converter, a voltage sensor and a display, wherein the power converter comprises a zero line contact, a live line contact, a ground line contact and a shell contact, and the shell contact of the power converter is configured to be connected with the shell of the equipment to be detected, the voltage sensor is connected with the power converter and is configured to detect the measuring voltage between every two contacts of the power converter, the display is connected with the voltage sensor and is used for displaying the variation relation of the measuring voltage along with time, when the on-off switch is switched from the on-state to the off-state, the device to be detected and the voltage sensor are switched from the parallel connection to the series connection, to detect the residual voltage between each joint of the device under test and the housing two by two via the respective contacts of the power converter. According to the utility model discloses, can provide an easy and simple to handle can be used to detect the electric device of waiting to examine the residual voltage of equipment.
Description
Technical Field
The utility model relates to an electric device for detecting the residual voltage of waiting to examine equipment.
Background
According to section I of medical Electrical apparatus; the requirement for residual voltage in the safety general requirements is that the residual voltage of the conductive parts of the capacitor circuit which are accessible by the regulator cap used in normal use is not more than 60V when the conductive parts of the capacitor circuit are opened immediately after the power failure of the medical electrical equipment.
Further, part I of the medical electrical apparatus; safety general requirements the following tests were also proposed to check for compliance with the requirements, namely: the medical electrical apparatus is operated at nominal voltage, then the power supply is disconnected, the regulator orifice cover used in normal use is opened as quickly as possible under normal circumstances, and then the residual voltage on the accessible capacitors or circuit components is immediately measured. For example, the residual voltage between the live, neutral, earth and the housing of the medical electrical device is measured.
However, when the above test is performed, if the adjustment hole cover is manually opened or the voltmeter is manually connected to the capacitor, the circuit component or the equipment housing, the process of the above test may be troublesome. Therefore, there is a need for a device that facilitates the completion of the above-described tests and is simple to operate.
Disclosure of Invention
The present invention has been made in view of the above-mentioned prior art, and an object of the present invention is to provide an electrical device for detecting the residual voltage of a device to be inspected, which is easy and convenient to operate.
To this end, the present invention provides an electrical device for detecting residual voltage of an apparatus to be inspected, comprising a power line, an on-off device, a power converter, a voltage sensor, and a display, wherein the power line is configured to be connectable to a mains supply, the on-off device is disposed between the power line and the power converter, and is configured to control connection or disconnection of the power line and the power converter, the power converter is connected to the mains supply via the power line and the on-off device, and the power converter comprises a zero line contact, a live line contact, a ground line contact, and a housing contact, the zero line contact of the power converter is configured to be connectable with a zero line joint of the apparatus to be inspected, the live line contact of the power converter is configured to be connectable with a live line joint of the apparatus to be inspected, and the ground line contact of the power converter is configured to be connectable with a ground line joint of the apparatus to be inspected, power converter's shell contact configuration can with the shell of waiting to examine equipment is connected, voltage sensor connect in power converter and configuration are detectable the measuring voltage between each two liang of contacts of power converter, the display connect in voltage sensor is used for showing measuring voltage is along with the change relation of time, works as when the on-off ware is in the connected state, wait to examine equipment with voltage sensor parallel connection works as when the on-off ware switches into the disconnected state by the connected state, wait to examine equipment with voltage sensor switches into series connection, with the via each contact of power converter detects each joint and the two liang of residual voltage of shell of waiting to examine equipment.
The utility model relates to an among the electric installation, use have the configuration to can with wait the zero line articulate's of examining equipment zero line contact, the configuration can with wait the live wire articulate's of examining equipment live wire contact, the configuration can with wait the earth wire articulate's of examining equipment ground wire contact and the configuration can with wait the shell contact's of examining equipment shell contact power converter and be connected with waiting to examine equipment, the use configuration is to be connected with power converter for each two liang of measuring voltage's of contact of detectable power converter voltage sensor, and use the on-off ware to switch waiting to examine equipment and voltage sensor's parallel connection and series connection. When the on-off ware is in the connected state, wait to examine equipment and voltage sensor parallel connection, when the on-off ware switches into the off-state by the connected state, wait to examine equipment and voltage sensor and switch into series connection by parallel connection to can make voltage sensor detect each joint and the shell surplus voltage between two liang of waiting to examine equipment via each contact of power converter. Under this condition, through the utility model relates to an electric device can make and wait to examine equipment and switch into the outage state by the running state under rated voltage to can conveniently and measure immediately and wait to examine each joint of equipment and the shell residual voltage between two liang. Therefore, the electric device which is simple and convenient to operate and can be used for detecting the residual voltage of the equipment to be tested can be provided.
In addition, in the electric device according to the present invention, optionally, a matrix switch provided between the power converter and the voltage sensor is further included, and the matrix switch is configured to switch on or off between the voltage sensor and each contact of the power converter. In this case, the voltage sensor can be conveniently adjusted to be in communication with the contact to be detected by a matrix switch configured to switch the connection or disconnection between the voltage sensor and the respective contacts of the power converter.
Additionally, in the electrical device of the present invention, optionally, the matrix switch includes a voltage sensor and a first gear, a second gear, and a third gear, wherein the first gear is connected to the zero line contact and the live line contact of the power converter, the second gear is connected to the zero line contact and the ground line contact of the power converter, and the third gear is connected to the live line contact and the ground line contact of the power converter. In this case, by setting a plurality of shift positions in the matrix switcher, the voltage sensor can be easily adjusted to communicate with the contact to be detected.
Additionally, in the electrical device of the present invention, optionally, the matrix switch further includes a fourth gear that makes the voltage sensor communicate with the zero line contact and the shell contact of the power converter, a fifth gear that makes the voltage sensor communicate with the live line contact and the shell contact of the power converter, and a sixth gear that makes the voltage sensor communicate with the ground line contact and the shell contact of the power converter. In this case, by setting a plurality of shift positions in the matrix switcher, the voltage sensor can be easily adjusted to communicate with the contact to be detected.
Further, in the electric device according to the present invention, optionally, the display is an oscilloscope, and the oscilloscope is configured to display a waveform diagram of the measurement voltage with time. In this case, the change of the measurement voltage with time can be displayed easily and intuitively by an oscilloscope.
In addition, in the electric apparatus according to the present invention, optionally, the oscilloscope is configured to record a time node at which the on-off switch is switched from the on state to the off state, and a waveform diagram of the measurement voltage with time within a predetermined time after the time node. In this case, it is possible to facilitate recording of the time-dependent change in the measured voltage of the apparatus to be inspected within a predetermined time after power-off.
Additionally, in the electrical apparatus of the present invention, optionally, the power converter includes a first socket and a second socket connected in parallel, the inspection device is connected to the first socket, the voltage sensor is connected to the second socket, and the first socket is a national standard socket, an english standard socket, a american standard socket, or an european standard socket. Therefore, the method can be suitable for detecting the devices to be detected with different specifications.
Additionally, in the electrical device of the present invention, optionally, the electrical device further includes a housing detection line for connecting the housing contact of the power converter and the housing of the inspection device. In this case, by the case detection line, it is possible to facilitate connection of the case contact of the power converter and the case of the apparatus to be inspected.
Further, in the electric apparatus according to the present invention, optionally, the housing detection line has a contact connection terminal configured to be connectable with the housing contact and a housing connection terminal configured to be connectable with the housing of the inspection device, and the housing connection terminal is a flexible metal foil. In this case, the connection to the housing of the device to be examined can be facilitated by the housing connection end being provided as a flexible metal foil.
In addition, in the electric device according to the present invention, the metal foil may be an aluminum foil or a copper foil.
According to the utility model discloses, can provide an easy and simple to handle can be used to detect the electric device of waiting to examine the residual voltage of equipment.
Drawings
The invention will now be explained in further detail by way of example only with reference to the accompanying drawings, in which:
fig. 1 is a schematic diagram illustrating a connection between an electrical device and a device to be inspected according to an example of the present invention.
Fig. 2A is a schematic circuit diagram illustrating the device under test and the voltage sensor when the on-off device according to the example of the present invention is in a connected state; fig. 2B is a schematic circuit diagram illustrating the inspection device and the voltage sensor when the on-off device according to the example of the present invention is in the off state.
Fig. 3 is a schematic diagram showing a change over time of a measured voltage displayed by a display according to an example of the present invention.
Fig. 4A is a schematic circuit diagram showing the device under test and the voltage sensor when the matrix switcher according to the example of the present invention is switched to the first shift position,
FIG. 4B is a schematic circuit diagram showing the DUT and the voltage sensor when the matrix switcher switches to the second position according to the example of the present invention,
FIG. 4C is a schematic circuit diagram showing the DUT and the voltage sensor when the matrix switcher switches to the third position according to the example of the present invention,
FIG. 4D is a schematic circuit diagram showing the DUT and the voltage sensor when the matrix switcher switches to the fourth gear according to the example of the invention,
FIG. 4E is a schematic circuit diagram showing the DUT and the voltage sensor when the matrix switcher switches to the fifth gear according to the example of the invention,
fig. 4F is a schematic circuit diagram illustrating the inspection device and the voltage sensor when the matrix switcher switches to the sixth gear according to the example of the present invention.
Detailed Description
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, the same components are denoted by the same reference numerals, and redundant description thereof is omitted. The drawings are schematic and the ratio of the dimensions of the components and the shapes of the components may be different from the actual ones.
It is noted that the terms "comprises," "comprising," and "having," and any variations thereof, in the present disclosure, such that a process, method, system, article, or apparatus that comprises or has a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include or have other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In addition, the headings and the like referred to in the following description of the present invention are not intended to limit the content or scope of the present invention, but only serve as a reminder for reading. Such a subtitle should neither be understood as a content for segmenting an article, nor should the content under the subtitle be limited to only the scope of the subtitle.
The utility model relates to an electric device that can be used to detect the residual voltage of waiting to examine equipment. Through the utility model discloses an electric device can detect easily and conveniently and wait to examine equipment and switch into the outage state by the running state under rated voltage after, wait to examine each joint (including zero line joint, live wire joint and ground wire joint) of equipment and the change relation of the residual voltage of shell between two liang with time.
Hereinafter, the electric device 10 for detecting the residual voltage of the apparatus to be inspected 20 according to the present embodiment will be described in detail with reference to the drawings.
Fig. 1 is a schematic diagram illustrating a connection between an electrical device 10 and a device 20 to be inspected according to an example of the present invention.
In an embodiment of the present invention, the electrical device 10 may include a power line 11, an on-off device 12, and a power converter 13. Wherein, the power line 11 may be connected to the commercial power, and the on-off device 12 may be disposed between the power line 11 and the power converter 13, so that the power converter 13 is connected to the commercial power via the on-off device 12 and the power line 11.
In this embodiment, the device to be examined 20 may be connected to the power converter 13 and thus to the mains (see fig. 1). In some examples, the device to be inspected 20 may have a neutral connection 21, a live connection 22 and a ground connection 23, and the device to be inspected 20 may be connected with the power converter 13 via the neutral connection 21, the live connection 22 and the ground connection 23.
In some examples, the on-off device 12 may be configured to control connection or disconnection of the power line 11 to the power converter 13. When the on-off switch 12 is in the on-state, the power supply line 11 and the power converter 13 are also in the on-state, that is, the power converter 13 is connected to the commercial power in this case. When the on-off switch 12 is in the off state, the power line 11 and the power converter 13 are also in the off state, that is, the power converter 13 is disconnected from the commercial power in this case.
In some examples, the power converter 13 may include a neutral contact 131, a live contact 132, and a ground contact 133 (see fig. 1). The neutral contact 131 may be connected to a neutral line of the commercial power, the live contact 132 may be connected to a live line of the commercial power, and the ground contact 133 may be connected to a ground line of the commercial power.
In addition, the neutral contact 131 of the power converter 13 is configured to be connectable with the neutral connection 21 of the device under test 20, the live contact 132 of the power converter 13 is configured to be connectable with the live connection 22 of the device under test 20, and the ground contact 133 of the power converter 13 is configured to be connectable with the ground connection 23 of the device under test 20. Thereby, the device 20 to be tested can be connected to the mains through the power converter 13.
In some examples, the power converter 13 may further include a housing contact 134, and the housing contact 134 is configured to be connectable with a housing of the device under examination 20 (see fig. 1). In this embodiment, the housing contacts 134 of the power converter 13 may be independent of the neutral, live and ground contacts 131, 132, 133.
In some examples, the power converter 13 may include a first receptacle 13a (see fig. 1). The apparatus to be inspected 20 can be connected with the first socket 13 a. In some examples, the three wiring contacts of the first receptacle 13a may be connected with the neutral, live and ground contacts 131, 132, 133, respectively.
In some examples, the first receptacle 13a may be a national standard receptacle, an english standard receptacle, a american standard receptacle, or a european standard receptacle. This enables the apparatus to be connected to apparatuses 20 to be inspected which are different in specification (for example, are produced in different regions).
In some examples, the electrical device 10 may include a housing detection line 14 (see fig. 1). In some examples, the housing detection line 14 may connect the housing contacts 134 of the power converter 13 with the housing of the device under test 20. In this case, by the housing detection line 14, it is possible to facilitate the connection of the housing contact 134 of the power converter 13 with the housing of the apparatus to be inspected 20.
In some examples, the housing detection line 14 may have a contact connection terminal (not shown) configured to be connectable with the housing contact 134, and a housing connection terminal (not shown) configured to be connectable with a housing of the device under test 20.
In some examples, the contact connection ends of the housing test wire 14 may be plug-in connection ends, bolt-on connection ends, snap-in connection ends, or the like.
In some examples, the housing connection end of the housing detection wire 14 may be a flexible metal foil. In this case, the connection with the housing of the device 20 to be examined can be facilitated by providing the housing connection end as a flexible metal foil. In some examples, the flexible metal foil may be a rectangular thin sheet metal foil. In some examples, the flexible metal foil may be a 5cm x 5cm, 5cm x 10cm, 10cm x 20cm, or 20cm x 20cm metal foil. In some examples, the flexible metal foil may be an aluminum foil or a copper foil.
In some examples, electrical device 10 may include a voltage sensor 14. The voltage sensor 14 may be configured to detect a voltage between each contact of the power converter 13. For example, the voltage sensor 14 may be connected to the neutral contact 131, the live contact 132, the ground contact 133, or the case contact 134 of the power converter 13, and configured to detect a voltage between the neutral contact 131 and the line contact 132, a voltage between the neutral contact 131 and the ground contact 133, a voltage between the live contact 132 and the ground contact 133, a voltage between the neutral contact 131 and the case contact 134, a voltage between the live contact 132 and the case contact 134, or a voltage between the ground contact 133 and the case contact 134.
In some examples, the power converter 13 may also include a second receptacle 13b (see fig. 1). In some examples, the three wiring contacts of the second receptacle 13b may be connected with the neutral, live and ground contacts 131, 132, 133, respectively. In some examples, the second receptacle 13b may be connected in parallel with the first receptacle 13 a. In some examples, the voltage sensor 15 may be connected with the second socket 13 b.
Fig. 2A is a schematic circuit diagram illustrating the device under test 20 and the voltage sensor 15 when the on-off device 12 according to the example of the present invention is in a connected state; fig. 2B is a schematic circuit diagram illustrating the device for testing 20 and the voltage sensor 15 when the on-off device 12 according to the present invention is in the off state. In the embodiment shown in fig. 2A and 2B, the voltage sensor 15 is connected to the neutral contact 131 and the live contact 132 of the power converter 13, and the neutral connection 21 of the device to be checked is connected to the neutral contact of the power converter 13, the live connection 22 is connected to the live contact 132, the ground connection 23 is connected to the ground contact 133, and the housing of the device to be checked 20 is connected to the housing contact 134.
In the present embodiment, when the on-off switch 12 is in the on state, the device to be inspected 20 may be connected in parallel with the voltage sensor 15 (see fig. 2A). In this case, in the embodiment shown in fig. 2A, the voltage sensor 15 may be connected to the neutral and live wires of the mains via the neutral and live contacts 131, 132 of the power converter 13, so as to detect the voltage between the neutral and live wires of the mains, i.e. the voltage between the neutral and live connectors 21, 22 of the device 20 to be checked.
In the present embodiment, the device under test 20 may be connected in series with the voltage sensor 15 when the switch 12 is in the off state (see fig. 2B). In this case, the voltage sensor 15 may be connected to the neutral and live connections 21, 22 of the device under test 20 via the neutral and live contacts 131, 132 of the power converter 13, so as to detect the voltage between the neutral and live connections 21, 22 of the device under test 20.
In the present embodiment, when the on-off switch 12 is switched from the on state to the off state, the voltage sensor 15 can be switched from detecting the voltage between the zero line and the live line of the commercial power to detecting the voltage between the zero line terminal 21 and the live line terminal 22 of the device under test 20. In this case, by controlling the on state and the off state of the on-off switch 12, it is possible to facilitate detection of the residual voltage after the power-off of the device under test 20 and the change in the residual voltage with time.
In some examples, electrical device 10 may include display 16. In some examples, the display 16 may be connected to the voltage sensor 15, and the display 16 may display the pressure value measured by the voltage sensor 15.
Fig. 3 is a schematic diagram showing the change over time of the measured voltage displayed by the display 16 according to an example of the present invention.
In some examples, the display 16 may be an oscilloscope configured to display a waveform diagram of the voltage measured by the voltage sensor 15 over time (see fig. 3). In this case, the change in the measurement voltage with time can be displayed more intuitively by an oscilloscope.
In some examples, the oscilloscope may be configured to record a waveform diagram of a time node at which the on-interrupter 12 switches from the on-state to the off-state, and a voltage measured by the voltage sensor 15 over time within a predetermined time after the time node. In this case, it is possible to facilitate recording of the time-dependent change in the measured voltage (i.e., the voltage value measured by the voltage sensor 15) of the apparatus to be inspected 20 within a predetermined time after power-off.
In some examples, the predetermined time may be 1s-3s, i.e., 1s-3s in the embodiment shown in FIG. 3 (t1-t 0). In the embodiment shown in fig. 3, t0 may be understood as a time node at which the on-off device 12 is switched from the on state to the off state, that is, t0 may be understood as a time node at which the equipment to be inspected 20 is disconnected from the commercial power, (t1-t0) may be understood as a predetermined time, and U1 may be understood as a pressure value measured by the pressure sensor 15 at t 1. That is, the oscilloscope may record a waveform diagram of the voltage measured by the voltage sensor 15 over time within a predetermined time (i.e., t1-t0 in the embodiment shown in fig. 3) after the time node (i.e., t0 in the embodiment shown in fig. 3) at which the on-off device 12 switches from the on state to the off state.
In some examples, the remaining voltage of the apparatus to be inspected 20 after a predetermined time has passed after the on state of the on-off switch 12 is switched to the off state can also be known from a waveform recorded by an oscilloscope. For example, in the embodiment shown in fig. 3, after the on-state of the on-off device 12 is switched to the off-state at the time to, the remaining voltage of the to-be-inspected apparatus 20 is U1 at the time t 1.
In some examples, when a predetermined time elapses after the on-state of the on-switch 12 is switched to the off-state, the apparatus 20 to be inspected may be regarded as meeting the electrical safety requirement if the remaining voltage of the apparatus 20 to be inspected does not exceed a predetermined value. In some examples, the predetermined value may be 60V. For example, in the embodiment shown in fig. 3, if (t1-t0) is 1s and the value of U1 does not exceed 60V, the apparatus under test 20 can be considered to meet the electrical safety requirements.
In some examples, the electrical device 10 may further include a matrix switch 17 disposed between the power converter 13 and the voltage sensor 15, and the matrix switch 17 may be configured to switch on and off between the voltage sensor 15 and the respective contacts of the power converter 13. In this case, the voltage sensor 15 can be conveniently adjusted to communicate with the contact to be detected by the matrix switcher 17 configured to switch the communication or disconnection between the voltage sensor 15 and the respective contacts of the power converter 13.
In some examples, the matrix switch 17 may include a first gear position that places the voltage sensor 15 in communication with the neutral and live contacts 131, 132 of the power converter 13. In this case, the voltage sensor 15 may measure the voltage between the neutral contact 131 and the live contact 132 of the power converter 13. When the on-off switch 12 is in the open state, the voltage sensor 15 can measure the voltage between the neutral connection 21 and the live connection 22 of the device under test 20.
In some examples, the matrix switch 17 may include a second position that places the voltage sensor 15 in communication with the neutral and ground contacts 131, 133 of the power converter 13. In this case, the voltage sensor 15 may measure the voltage between the neutral contact 131 and the ground contact 133 of the power converter 13. When the on-off switch 12 is in the off state, the voltage sensor 15 can measure the voltage between the neutral connection 21 and the ground connection 23 of the device under test 20.
In some examples, the matrix switcher 17 may include a third gear position that places the voltage sensor 15 in communication with the hot and ground contacts 132, 133 of the power converter 13. In this case, the voltage sensor 15 may measure the voltage between the live contact 132 and the ground contact 133 of the power converter 13. When the switch-off 12 is in the open state, the voltage sensor 15 may measure the voltage between the live connection 22 and the earth connection 23 of the device under examination 20.
In some examples, the matrix switch 17 may include a fourth position that places the voltage sensor 15 in communication with the neutral contact 131 and the housing contact 134 of the power converter 13. In this case, the voltage sensor 15 may measure the voltage between the neutral contact 131 and the housing contact 134 of the power converter 13. When the switch 12 is in the open state and the housing of the device under test 20 is connected with the housing contacts 134 of the power converter 13, the voltage sensor 15 can measure the voltage between the neutral connection 21 of the device under test 20 and the housing.
In some examples, the matrix switcher 17 may include a fifth gear position that places the voltage sensor 15 in communication with the hot and housing contacts 132, 134 of the power converter 13. In this case, the voltage sensor 15 may measure the voltage between the live contact 132 and the housing contact 134 of the power converter 13. When the switch 12 is in the open state and the housing of the device under test 20 is connected with the housing contacts 134 of the power converter 13, the voltage sensor 15 can measure the voltage between the live connection 22 of the device under test 20 and the housing.
In some examples, the matrix switcher 17 may include a sixth position that places the voltage sensor 15 in communication with the ground contact 133 and the housing contact 134 of the power converter 13. In this case, the voltage sensor 15 may measure the voltage between the ground contact 133 and the housing contact 134 of the power converter 13. When the switch 12 is in the open state and the housing of the device under test 20 is connected with the housing contact 134 of the power converter 13, the voltage sensor 15 can measure the voltage between the ground connection 22 of the device under test 20 and the housing.
Fig. 5 is a schematic flow chart showing the detection of the residual voltage of the apparatus to be inspected 20 according to the present embodiment. Hereinafter, a flow of detecting the residual voltage of the device under test 20 will be described in detail with reference to fig. 5.
In the present embodiment, as shown in fig. 5, the flow of detecting the residual voltage of the device under test 20 may include the following steps: the method comprises the steps of (S100) connecting the device to be detected 20 into mains supply; disconnecting the device 20 to be tested from the mains (step S200); measuring the voltage between each joint and the shell of the equipment to be tested 20 after power failure (step S300); and recording the change relation of the voltage between every two connectors and shells of the equipment to be tested 20 in a preset time after power failure along with the time (step S400).
In the present embodiment, in step S100, the apparatus to be inspected 20 may be connected to the commercial power through the power converter 13 according to the example of the present embodiment.
In the present embodiment, in step S200, the apparatus to be inspected 20 can be disconnected from the commercial power by switching the on/off switch 12 from the on state to the off state. In the present embodiment, when the on-off switch 12 is switched from the on state to the off state, the device under test 20 and the voltage sensor 15 can be switched from the parallel state to the series state. That is to say that in this case the voltage sensor 15 can measure the voltage between two of the individual connections of the device under test 20.
In the present embodiment, in step S300, the voltage sensor 15 may measure the voltage between the neutral terminal 21 and the live terminal 22 of the device under test 20 by switching the gear of the matrix switch 17 to measure the voltage between each terminal of the device under test 20 two by two, for example, switching the matrix switch 17 to the first gear.
In this embodiment, in step S400, a time node (e.g., t0 in the embodiment shown in fig. 3) at which the apparatus 20 to be tested is switched from on to off and a time-dependent voltage variation between each connector and the housing after the time node (e.g., a waveform corresponding to the time between t0 and t1 in the embodiment shown in fig. 3) can be recorded by an oscilloscope.
While the present invention has been described in detail in connection with the drawings and examples, it is to be understood that the above description is not intended to limit the invention in any way. The present invention may be modified and varied as necessary by those skilled in the art without departing from the true spirit and scope of the invention, and all such modifications and variations are intended to be included within the scope of the invention.
Claims (10)
1. An electrical device for detecting the residual voltage of a device to be tested,
comprises a power line, an on-off device, a power converter, a voltage sensor and a display,
the power cord is configured to be connectable to a mains supply,
the on-off device is arranged between the power line and the power converter and is configured to control connection or disconnection of the power line and the power converter,
the power converter is connected to mains via the power line and the switch, and the power converter comprises a zero line contact, a live line contact, a ground line contact and a housing contact,
the neutral contact of the power converter is configured to be connectable with a neutral connection of the device to be tested, the live contact of the power converter is configured to be connectable with a live connection of the device to be tested, and the ground contact of the power converter is configured to be connectable with a ground connection of the device to be tested,
the housing contacts of the power converter are configured to be connectable with the housing of the device under test,
the voltage sensor is connected to the power converter and configured to detect a measured voltage between each contact of the power converter,
the display is connected with the voltage sensor and is used for displaying the change relation of the measuring voltage along with time,
when the on-off device is in a connected state, the equipment to be detected is connected in parallel with the voltage sensor,
when the on-off device is switched to an off state from a connected state, the equipment to be inspected and the voltage sensor are switched to be connected in series, so that the residual voltage between each joint of the equipment to be inspected and the shell is detected through each contact of the power converter.
2. The electrical device of claim 1,
the matrix switcher is configured to switch connection or disconnection between the voltage sensor and each contact of the power converter.
3. The electrical device of claim 2,
the matrix switcher comprises a first gear enabling the voltage sensor to be communicated with a zero line contact and a live line contact of the power converter, a second gear enabling the voltage sensor to be communicated with a zero line contact and a ground line contact of the power converter, and a third gear enabling the voltage sensor to be communicated with a live line contact and a ground line contact of the power converter.
4. The electrical device of claim 3,
the matrix switcher further comprises a fourth gear enabling the voltage sensor to be communicated with a zero line contact and a shell contact of the power converter, a fifth gear enabling the voltage sensor to be communicated with a live line contact and a shell contact of the power converter, and a sixth gear enabling the voltage sensor to be communicated with a ground line contact and a shell contact of the power converter.
5. The electrical device of claim 1,
the display is an oscilloscope configured to display a waveform diagram of the measurement voltage over time.
6. The electrical device of claim 5,
the oscilloscope is configured to record a time node at which the on-state of the on-off switch is switched to the off state, and a waveform diagram of the measured voltage over time within a predetermined time after the time node.
7. The electrical device of claim 1,
power converter includes parallelly connected first socket and second socket, wait to examine equipment connect in first socket, voltage sensor connect in the second socket, and first socket is national standard socket, english standard socket, American standard socket or european standard socket.
8. The electrical device of claim 1,
the detection device also comprises a shell detection line used for connecting the shell contact of the power converter with the shell of the equipment to be detected.
9. The electrical device of claim 8,
the housing test line has a contact connection terminal configured to be connectable with the housing contact, and a housing connection terminal configured to be connectable with a housing of the apparatus to be tested, and the housing connection terminal is a flexible metal foil.
10. The electrical device of claim 9,
the metal foil is an aluminum foil or a copper foil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120937292.7U CN214703761U (en) | 2021-04-30 | 2021-04-30 | Electrical device for detecting residual voltage of equipment to be tested |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120937292.7U CN214703761U (en) | 2021-04-30 | 2021-04-30 | Electrical device for detecting residual voltage of equipment to be tested |
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| Publication Number | Publication Date |
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| CN214703761U true CN214703761U (en) | 2021-11-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120937292.7U Active CN214703761U (en) | 2021-04-30 | 2021-04-30 | Electrical device for detecting residual voltage of equipment to be tested |
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| Country | Link |
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| CN (1) | CN214703761U (en) |
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Address after: Room 504, building 2, No.36, Doukou Road, Guangdong Macao cooperative traditional Chinese medicine science and Technology Industrial Park, Hengqin New District, Zhuhai City, Guangdong Province, 519031 Patentee after: Weishi Aikangte (Guangdong) Medical Technology Co.,Ltd. Patentee after: Hangzhou Weixiao Medical Technology Co.,Ltd. Patentee after: Shanghai aikangte Medical Technology Co.,Ltd. Patentee after: Zhuhai Xigu Medical Technology Co.,Ltd. Address before: Room 504, building 2, No.36, Doukou Road, Guangdong Macao cooperative traditional Chinese medicine science and Technology Industrial Park, Hengqin New District, Zhuhai City, Guangdong Province, 519031 Patentee before: Zhuhai Weishi aikangte Pharmaceutical Technology Co.,Ltd. Patentee before: Hangzhou Weixiao Medical Technology Co.,Ltd. Patentee before: Shanghai aikangte Medical Technology Co.,Ltd. Patentee before: Zhuhai Xigu Medical Technology Co.,Ltd. |
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Effective date of registration: 20231204 Address after: Room 201-2, building 48, No. 488-1, Donghu Beihu street, Yuhang District, Hangzhou, Zhejiang 311100 Patentee after: Hangzhou Weixiao Medical Technology Co.,Ltd. Address before: Room 504, building 2, No.36, Doukou Road, Guangdong Macao cooperative traditional Chinese medicine science and Technology Industrial Park, Hengqin New District, Zhuhai City, Guangdong Province, 519031 Patentee before: Weishi Aikangte (Guangdong) Medical Technology Co.,Ltd. Patentee before: Hangzhou Weixiao Medical Technology Co.,Ltd. Patentee before: Shanghai aikangte Medical Technology Co.,Ltd. Patentee before: Zhuhai Xigu Medical Technology Co.,Ltd. |
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