CN212391502U

CN212391502U - Power line for electrical test

Info

Publication number: CN212391502U
Application number: CN202020311042.8U
Authority: CN
Inventors: 张岩; 刘效锦; 马贵荣; 彭豫忞
Original assignee: Shuohuang Railway Development Co Ltd
Current assignee: Shuohuang Railway Development Co Ltd
Priority date: 2020-03-13
Filing date: 2020-03-13
Publication date: 2021-01-22
Anticipated expiration: 2030-03-13

Abstract

The utility model discloses a power line for electrical test, wherein one end of a first wire is connected with an external power supply; and one end of the second lead is connected to the testing instrument, so that the testing instrument is electrically communicated with an external power supply, and the testing instrument can carry out corresponding electrical tests. Because first wire and second wire series connection have the regulator device, and install the digital display table on the regulator device, consequently, through the digital display table for whether the electric test personnel can monitor the voltage value of input constantly satisfies the operating requirement of test instrument. When the voltage value input by the test instrument fluctuates, the digital display meter can feed back the current input voltage value on the test instrument to the electrical tester in time. The electric test personnel carry out corresponding regulation to voltage regulating device according to the voltage value on the digital display table, so, cooperate through voltage regulating device and digital display table for voltage value in the electric test process remains stable throughout, improves the reliability of electric test result greatly.

Description

Power line for electrical test

Technical Field

The utility model relates to an electrical test technical field especially relates to a power cord for electrical test.

Background

In an electrical test of a power system, a traditional power line only has the function of switching on and off a power supply. In actual use, the electrical testing instrument has high requirement on the accuracy of the power supply voltage, but in many cases, the power supply voltage which can be used by electrical testing personnel is unstable and may be too high or too low, which causes work interruption. Meanwhile, the power supply voltage cannot be monitored in real time, so that the reliability of the electrical test result is seriously influenced.

SUMMERY OF THE UTILITY MODEL

Therefore, a power line for an electrical test is needed, so that the power voltage is stabilized, and the electrical test is ensured to be stably performed; meanwhile, the power supply voltage can be monitored in real time.

The technical scheme is as follows:

a power cord for electrical testing, comprising: one end of the first lead is used for being electrically connected with a test instrument; one end of the second lead is used for being electrically connected with an external power supply; and the first wire and the second wire are connected in series, a digital display meter is arranged on the voltage regulating device and used for displaying the voltage value input by the test instrument, and the voltage regulating device is used for regulating the voltage value input by the test instrument.

In the power line for the electrical test, one end of the first lead is connected to an external power supply in the electrical test process; and one end of the second lead is connected to the testing instrument, so that the testing instrument is electrically communicated with an external power supply, and the testing instrument can carry out corresponding electrical tests. Because first wire and second wire series connection have the regulator device, and install the digital display table on the regulator device, consequently, through the digital display table for whether the electric test personnel can monitor the voltage value of input constantly satisfies the operating requirement of test instrument. When the voltage value input by the test instrument fluctuates, namely the voltage input by the test instrument is larger or smaller than the preset voltage, the digital display meter can feed back the current input voltage value on the test instrument to the electrical test personnel in time. The electric test personnel carry out corresponding regulation to the voltage regulation spare according to the voltage value on the digital display table, and the voltage value on the digital display table keeps unanimous with predetermined voltage, so, cooperate through voltage regulation spare and digital display table for the voltage value in the electric test process remains stable throughout, improves the reliability of electric test result greatly.

The principle and effect of the present invention will be further explained by combining the above scheme:

in one embodiment, the power line for the electrical test further comprises a first connector, the first connector is connected to one end, away from the voltage regulating device, of the first wire, and the first connector is used for being electrically connected with the test instrument.

In one embodiment, the power cord for electrical test further includes a detection circuit disposed in the first connector, the detection circuit is electrically connected to the first conductive wire, and the detection circuit is configured to detect a connection state of the first conductive wire on the first connector.

In one embodiment, the detection circuit includes a first connection end, a second connection end, a third connection end, a first indicator light, a second indicator light, and a third indicator light, two ends of the first indicator light are respectively connected to the second connection end and the third connection end, two ends of the second indicator light are respectively connected to the first connection end and the second connection end, two ends of the third indicator light are respectively connected to the first connection end and the third connection end, the first indicator light, the second indicator light, and the third indicator light are connected in parallel, and the first connection end, the second connection end, and the third connection end are respectively connected to a fire end, a zero line end, and a ground end of the power line.

In one embodiment, the detection circuit further includes three diodes, and the three diodes are respectively connected in series with the first indicator light, the second indicator light and the second indicator light.

In one embodiment, the first connector comprises a housing and three pins arranged on the housing, and the detection circuit is arranged in the housing.

In one embodiment, the housing comprises a first shell and a second shell, and the first shell is detachably mounted on the second shell.

In one embodiment, the voltage regulating device is a thyristor module, and the thyristor module is electrically connected to the first wire and the second wire respectively.

In one embodiment, the silicon controlled module is provided with a regulating valve, and the regulating valve is used for regulating the input voltage of the test instrument.

In one embodiment, the power line for the electrical test further comprises a second plug connector, the second plug connector is connected to one end, away from the voltage regulating device, of the second wire, and the second plug connector is used for being electrically connected with the external power supply.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification.

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a power line for electrical tests according to an embodiment of the present invention;

fig. 2 is a schematic structural view of a first plug connector according to an embodiment of the present invention;

fig. 3 is a schematic diagram of a connection of a detection circuit according to an embodiment of the present invention.

Description of reference numerals:

100. a power cord for electrical testing; 110. a first conductive line; 120. a second conductive line; 130. a voltage regulating device; 131. a digital display meter; 132. adjusting a valve; 140. a first connector; 141. a housing; 1411. a first housing; 1412. a second housing; 142. a pin; 150. a second plug connector; 160. a detection circuit; 161. A first connection end; 162. a second connection end; 163. a third connection end; 164. a first indicator light; 165. A second indicator light; 166. a third indicator light; 167. a carbon film resistor; 168. and a diode.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and the following detailed description. It should be understood that the detailed description and specific examples, while indicating the scope of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In the present invention, the terms "first" and "second" do not denote any particular quantity or order, but are merely used to distinguish names.

In one embodiment, referring to fig. 1, a power cord 100 for electrical testing (hereinafter referred to as power cord 100) includes: a first conducting wire 110, wherein one end of the first conducting wire 110 is used for electrically connecting with a test instrument; a second conductive line 120, one end of the second conductive line 120 being electrically connected to an external power source; and the voltage regulating device 130, the first conducting wire 110 and the second conducting wire 120 are connected in series through the voltage regulating device 130, the voltage regulating device 130 is provided with a digital display meter 131, the digital display meter 131 is used for displaying a voltage value input by the test instrument, and the voltage regulating device 130 is used for regulating the voltage value input by the test instrument.

The power cord 100 for electrical test connects one end of the first wire 110 to an external power source during the electrical test; one end of the second wire 120 is connected to the testing instrument, so that the testing instrument is electrically connected to the external power supply, and the testing instrument can perform corresponding electrical tests. Because the first conducting wire 110 and the second conducting wire 120 are connected in series with the voltage regulating device 130, and the digital display meter 131 is installed on the voltage regulating device 130, the electric testing personnel can monitor whether the input voltage value meets the working requirement of the testing instrument at any time through the digital display meter 131. When the voltage value input by the testing instrument fluctuates, that is, the voltage input by the testing instrument is larger or smaller than the predetermined voltage, the digital display meter 131 can feed back the current input voltage value of the testing instrument to the electrical testing personnel in time. The electric test personnel correspondingly adjust the voltage regulating device 130 according to the voltage value on the digital display meter 131 until the voltage value on the digital display meter 131 is consistent with the preset voltage, so that the voltage regulating device 130 is cooperatively matched with the digital display meter 131, the voltage value in the electric test process is always kept stable, and the reliability of the electric test result is greatly improved.

The digital display meter 131 is a voltmeter and is electrically connected in parallel, that is, the first lead wire 110 or the second lead wire 120 is connected in parallel with the digital display meter 131. The predetermined voltage of the present embodiment is 220V.

Optionally, the mounting manner of the digital display meter 131 on the silicon controlled module may be injection molding, bonding, clamping, bolt connection, or the like.

It should be further noted that the connection manner of the first lead 110 and the testing instrument may be: the plug and the socket are connected in a plugging mode; alternatively, one end of the first wire 110 is directly wound around the copper terminal on the test instrument; alternatively, one end of the first wire 110 may be spot-welded to a pad on the test instrument, or the like. Similarly, the second wire 120 is connected to the external power source in the following manner: the plug and the socket are connected in a plugging mode; alternatively, one end of the first wire 110 is directly wound around a copper terminal on the external power supply; alternatively, one end of the first wire 110 is spot-welded to a pad on an external power supply, or the like.

Further, referring to fig. 1, the power cord 100 for electrical testing further includes a first connector 140. The first connector 140 is connected to an end of the first wire 110 away from the voltage regulating device 130, and the first connector 140 is used for electrically connecting with a test instrument. Thus, the first connector 140 is used for electrically connecting the first wire 110 with the testing instrument, and the connection operation between the equipment in the electrical testing process is greatly facilitated.

Optionally, the first connector 140 is in a socket configuration or a plug configuration. When the first plug-in connector 140 is in a socket structure, the testing device is provided with a plug structure; when the first connector 140 is in a plug structure, the test device has a socket structure.

Further, referring to fig. 1 and fig. 3, the power cord 100 for electrical testing further includes a detection circuit 160 built in the first connector 140. The detection circuit 160 is electrically connected to the first conductive trace 110, and the detection circuit 160 is used for detecting a connection state of the first conductive trace 110 on the first connector 140. Because the place of the electrical test is not fixed, whether the electrical tester damages and misconnects the connected power socket is unclear, and if the power socket is in a non-electricity or abnormal power supply condition, the wiring fault of the power line 100 needs to be analyzed and checked, and the working time is delayed, therefore, in the embodiment, the detection circuit 160 is arranged in the first plug-in connector 140, the wiring state between the first lead 110 and the first plug-in connector 140 is detected, the first lead 110 is ensured to be accurately connected with the first plug-in connector 140, and the power line 100 is ensured to stably supply power to the test instrument.

In one embodiment, referring to fig. 3, the detection circuit 160 includes a first connection end 161, a second connection end 162, a third connection end 163, a first indicator light 164, a second indicator light 165, and a third indicator light 166, two ends of the first indicator light 164 are respectively connected to the second connection end 162 and the third connection end 163, two ends of the second indicator light 165 are respectively connected to the first connection end 161 and the second connection end 162, two ends of the third indicator light 166 are respectively connected to the first connection end 161 and the third connection end 163, the first indicator light 164, the second indicator light 165, and the third indicator light 166 are connected in parallel, and the first connection end 161, the second connection end 162, and the third connection end 163 are respectively connected to a live wire end, a neutral wire end, and a ground wire end of the power cord 100.

Therefore, when the live wire of the first wire 110 is connected to the first connection end 161, the neutral wire is connected to the second connection end 162, and the ground wire is connected to the third connection end 163, that is, when the first wire 110 is normally connected to the plug, the first indicator lamp 164 is not turned on, the second indicator lamp 165 is turned on, and the third indicator lamp 166 is turned on after the power is turned on; when the live wire and the neutral wire of the first wire 110 are connected in reverse, that is, the live wire is connected to the second connection end 162, and the neutral wire is connected to the first connection end 161, after the live wire is powered on, the first indicator lamp 164 is turned on, the second indicator lamp 165 is turned on, and the third indicator lamp 166 is turned off; when the neutral wire is absent or disconnected in the circuit, i.e., the neutral wire is not connected to the second connection terminal 162, after the power is turned on, the first indicator lamp 164 is not turned on, the second indicator lamp 165 is not turned on, and the third indicator lamp 166 is turned on; when the ground line is absent or broken in the circuit, that is, the ground line is not connected to the third connection terminal 163, after the power is turned on, the first indicator lamp 164 is not turned on, the second indicator lamp 165 is turned on, and the third indicator lamp 166 is not turned on; when the circuit is short of hot or hot wire broken, i.e., hot wire is not connected to the first connection 161, the first indicator light 164 is not on, the second indicator light 165 is not on, the third indicator light 166 is not on, etc. after power is applied. Of course, there are also different connection states, which can be identified by corresponding indicator lights, which are not listed here.

Therefore, the connection relationship of the detection circuit 160 is specifically designed in this embodiment, so that the electrical tester can quickly analyze the wiring fault of the first wire 110 on the first connector 140 according to the on/off conditions of different indicator lights, and correct the connection of the first wire 110 in time, thereby effectively saving the troubleshooting time of the electrical tester and greatly improving the test efficiency of the electrical test.

It should be noted that the first conductor 110 and the second conductor 120 are three-phase lines, i.e., a live line, a neutral line, and a ground line.

Further, referring to fig. 3, the detection circuit 160 further includes three diodes 168. The three diodes 168 are connected in series with the first indicator lamp 164, the second indicator lamp 165, and the second indicator lamp 165, respectively. In this way, the unidirectional characteristic of the diode 168 is used to provide a rectifying effect for the branch in the detection circuit 160.

Specifically, referring to fig. 3, the first indicator light 164, the second indicator light 165 and the third indicator light 166 are all light emitting diodes, and the diode 168 and the light emitting diode are connected in series on the same branch. Meanwhile, the connection direction of the diode 168 and the light emitting diode is the same, that is, the anode of the diode 168 and the anode of the light emitting diode are both connected with the anode of the circuit, and the cathode of the diode 168 and the cathode of the light emitting diode are both connected with the cathode of the circuit. Of course, if the diode 168 is connected in reverse, the light emitting diode is also connected in reverse.

In one embodiment, referring to fig. 3, the detection circuit 160 further includes three carbon film resistors 167 respectively connected in series with the first indicator lamp 164, the second indicator lamp 165, and the third indicator lamp 166. It should be noted that, in the present embodiment, alternating current is supplied to the detection circuit 160.

In one embodiment, referring to fig. 3, the detection circuit 160 includes a light emitting diode, a diode 168 and a carbon film resistor 167. The number of the light emitting diodes, the number of the diodes 168 and the number of the carbon film resistors 167 are all three. A light emitting diode, a diode 168 and a carbon film resistor 167 are connected in series to form a branch, wherein the connection direction of the light emitting diode and the diode 168 is consistent, that is, when the light emitting diode is connected in the forward direction, the diode 168 is also connected in the forward direction; conversely, when the led is connected in reverse, the diode 168 is also connected in reverse. Since the number of the light emitting diodes, the diodes 168 and the carbon film resistors 167 are all three, the present embodiment can form three branches consisting of the light emitting diodes, the diodes 168 and the carbon film resistors 167. Two ends of one branch are respectively connected with the first connecting end 161 and the second connecting end 162; two ends of one branch are respectively connected with the second connecting end 162 and the third connecting end 163; the two ends of the last branch are connected to the first connection end 161 and the third connection end 163, respectively. When the first wire 110 is normally connected to the first connector 140, the live wire of the first wire 110 should be connected to the first connection terminal 161, the neutral wire of the first wire 110 should be connected to the second connection terminal 162, and the ground wire of the first wire 110 should be connected to the second connection terminal 162.

In one embodiment, referring to fig. 2, the first connector 140 includes a housing 141 and three pins 142 disposed on the housing 141. The detection circuit 160 is built into the housing 141. Thus, the three pins 142 are respectively inserted into the three jacks on the test instrument, so that the test instrument is stably powered.

Further, referring to fig. 2, the housing 141 includes a first housing 1411 and a second housing 1412, and the first housing 1411 is detachably mounted on the second housing 1412. In this way, in the process of connecting the first wire 110 and the first connector 140, the first housing 1411 is only required to be removed from the second housing 1412, so that the connection operation between the first wire 110 and the first connector 140 can be completed.

Optionally, the first housing 1411 and the second housing 1412 are mounted in a clamping manner, a bolt connection manner, an adhesion manner, or the like.

Specifically, referring to fig. 1 and fig. 2, the first housing 1411 and the second housing 1412 are connected by a snap-fit manner, the three pins 142 are disposed on the second housing 1412, the first connection end 161, the second connection end 162 and the third connection end 163 are disposed on the first housing 1411, and the three pins 142 are electrically connected to the first connection end 161, the second connection end 162 and the third connection end 163 one by one, respectively. Meanwhile, a first indicator lamp 164, a second indicator lamp 165, and a third indicator lamp 166 are also provided on the first housing 1411.

In one embodiment, referring to fig. 1, the voltage regulating device 130 is a thyristor module. The silicon controlled module is electrically connected to the first conductive line 110 and the second conductive line 120, respectively. In this way, the thyristor module is connected between the first conducting wire 110 and the second conducting wire 120, so that the thyristor module is integrated on the power line 100, and the power line 100 has a function of adjusting the input voltage value.

It should be noted that the thyristor module is a power semiconductor module, also called a thyristor module, and adopts a module packaging form, and a high-power semiconductor device with a four-layer structure of three PN junctions is provided. Three PN junctions, among others, correspond to three electrodes on the device housing 141: the electrode led out by the first layer of the P-type semiconductor is called an anode A, the electrode led out by the third layer of the P-type semiconductor is called a control electrode G, and the electrode led out by the fourth layer of the N-type semiconductor is called a cathode K. In the actual voltage regulation process, an alternating current voltage regulation circuit connection mode is usually adopted, namely, two unidirectional thyristors are connected in anti-parallel or bidirectional thyristors are adopted, so that the positive half cycle and the negative half cycle of the alternating current are symmetrically controlled, and the purpose of conveniently regulating the magnitude of the output alternating voltage is achieved. The specific connection mode of the silicon controlled module in the circuit is not an improved object of the present embodiment, and the specific connection mode of the circuit may refer to the existing literature and is not described herein again.

Specifically, the controllable silicon module can specifically select SKKT250/12E, SKKT210/12(16) E, 210A/1200V (1600V)/2U and other models of Ximenkang; optionally, it can be selected from Yingfei TT140N18KOF, etc. Of course, the circuit connections of different models can be directly referred to the respective specifications.

Further, referring to fig. 1, the silicon controlled module is provided with an adjusting valve 132. The regulator valve 132 is used to regulate the input voltage on the test instrument. When the voltage value that shows on digital display table 131 is less than or is higher than predetermined voltage value, rotatory governing valve 132 adjusts the input voltage value on the testing instrument for reading on the digital display table 131 keeps unanimous with predetermined voltage value, so, has made things convenient for testing personnel to voltage control's operation, makes the electric test process go on steadily.

In one embodiment, referring to fig. 1, the power cord 100 for electrical testing further includes a second connector 150. The second connector 150 is connected to an end of the second wire 120 away from the voltage regulating device 130, and the second connector 150 is used for electrically connecting with an external power source. Thus, the second wire 120 is electrically connected to an external power source through the second connector 150.

Optionally, the second connector 150 is in a socket configuration or a plug configuration. When the second connector 150 is in a socket structure, the external power supply has a plug structure; when the second connector 150 is a plug structure, the external power source has a socket structure.

Specifically, referring to fig. 1, the second plug is a pin tail plug. Wherein, the connection of article suffix plug and second wire 120 is: the pin tail plug is provided with three copper insertion pieces, the live wire of the second lead 120 is fixed on one copper insertion piece, the zero wire of the second lead 120 is fixed on the other copper insertion piece, and the ground wire of the second lead 120 is fixed on the last copper insertion piece.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A power cord for electrical testing, comprising:

one end of the first lead is used for being electrically connected with a test instrument;

one end of the second lead is used for being electrically connected with an external power supply; and

the voltage regulating device, first wire with the second wire passes through voltage regulating device series connection, be equipped with the digital display table on the voltage regulating device, the digital display table is used for showing the voltage value of test instrument input, the voltage regulating device is used for adjusting the voltage value of test instrument input.

2. The power cord for the electrical test of claim 1, further comprising a first connector, wherein the first connector is connected to one end of the first wire far away from the voltage regulating device, and the first connector is used for electrically connecting with the test instrument.

3. The power cord for electrical testing of claim 2, further comprising a detection circuit built into said first connector, said detection circuit being electrically connected to said first wire, said detection circuit being configured to detect a connection status of said first wire to said first connector.

4. The power cord for electrical testing of claim 3, wherein the detection circuit comprises a first connection end, a second connection end, a third connection end, a first indicator light, a second indicator light and a third indicator light, two ends of the first indicator light are respectively connected to the second connection end and the third connection end, two ends of the second indicator light are respectively connected to the first connection end and the second connection end, two ends of the third indicator light are respectively connected to the first connection end and the third connection end, the first indicator light, the second indicator light and the third indicator light are connected in parallel, and the first connection end, the second connection end and the third connection end are respectively connected to a live wire end, a zero wire end and a ground wire end of the power cord.

5. The power cord for electrical testing of claim 4, wherein said detection circuit further comprises three diodes connected in series with said first indicator light, said second indicator light, and said second indicator light, respectively.

6. The power cord for electrical testing of claim 4, wherein said first plug member comprises a housing and three prongs disposed on said housing, said detection circuit being disposed within said housing.

7. The electrical power cord for electrical testing of claim 6, wherein the housing comprises a first housing and a second housing, the first housing being removably mounted to the second housing.

8. The power cord for electrical testing of any one of claims 1 to 7, wherein the voltage regulating device is a thyristor module, and the thyristor module is electrically connected to the first wire and the second wire, respectively.

9. The power cord for electrical testing of claim 8, wherein said thyristor module has a regulator valve thereon for regulating an input voltage to said testing instrument.

10. The power cord for the electrical test of any one of claims 1 to 7, further comprising a second connector connected to an end of the second wire away from the voltage regulator, the second connector being configured to electrically connect to the external power source.