Take nuclear phase ware of automatic discrimination function

文档序号：1686170 发布日期：2020-01-03 浏览：23次中文

阅读说明：本技术 一种带自动判别功能的核相器 (Take nuclear phase ware of automatic discrimination function ) 是由赵骏丹许勇华王冠卿陈江张婷婷唐繁蔡俊杰潘薇刘伟裔庭孟帆周于 2019-10-28 设计创作，主要内容包括：本发明涉及一种核相器,包括电源装置和测试装置,电源装置包括由两个直流电源串联而成的电源组,以及三个接线端,其中第一接线端连接至第一直流电源的负极,第二接线端连接至第一直流电源的正极和第二直流电源的负极,第三接线端连接至第二直流电源的正极,测试装置包括四个发光二极管、两个电阻,以及三个端子,通过设计三个端子和四个发光二极管的连接关系,然后三个接线端分别连接被测电缆一端的三相,三个端子分别连接被测电缆另一端的三相,与现有技术相比,本发明具通过四个发光二极管的亮灯情况可以只需一次测试就识别出各端子和接线端的连接情况。(The invention relates to a phase detector, which comprises a power supply device and a test device, wherein the power supply device comprises a power supply group formed by connecting two direct current power supplies in series and three wiring terminals, wherein the first terminal is connected to the negative pole of the first direct current power supply, the second terminal is connected to the positive pole of the first direct current power supply and the negative pole of the second direct current power supply, the third terminal is connected to the positive pole of the second direct current power supply, the testing device comprises four light-emitting diodes, two resistors and three terminals, by designing the connection relationship of the three terminals and the four light-emitting diodes, then the three terminals are respectively connected with the three phases at one end of the tested cable, the three terminals are respectively connected with the three phases at the other end of the tested cable, compared with the prior art, the invention can identify the connection condition of each terminal and the wiring terminal only by one-time test through the lighting condition of the four light-emitting diodes.)

1. A phase detector is characterized by comprising a power supply device and a test device,

the power supply device comprises a power supply group formed by connecting a first direct current power supply and a second direct current power supply in series, and a first terminal, a second terminal and a third terminal, wherein the anode of the first direct current power supply is connected with the cathode of the second direct current power supply, the first terminal is connected with the cathode of the first direct current power supply, the second terminal is connected with the anode of the first direct current power supply and the cathode of the second direct current power supply, the third terminal is connected with the anode of the second direct current power supply,

the testing device comprises a first light emitting diode, a second light emitting diode, a third light emitting diode, a fourth light emitting diode, a first resistor, a second resistor, a first terminal, a second terminal and a third terminal, wherein the first terminal is respectively connected with the cathode of the first light emitting diode and the anode of the third light emitting diode, the second terminal is respectively connected with the cathode of the third light emitting diode, the anode of the fourth light emitting diode, the anode of the first light emitting diode and the cathode of the second light emitting diode through the first resistor, and the third terminal is respectively connected with the anode of the second light emitting diode and the cathode of the fourth light emitting diode through the second resistor;

the first wiring terminal, the second wiring terminal and the third wiring terminal are respectively connected with three phases at one end of a tested cable, the first terminal, the second terminal and the third terminal are respectively connected with three phases at the other end of the tested cable, and the connection condition of each terminal and the wiring terminals is identified through the lighting condition of four light-emitting diodes.

2. The phase detector of claim 1, wherein a first battery switch is disposed between the second terminal and the power pack, and a second battery switch is disposed between the third terminal and the power pack.

3. The phase reactor according to claim 1, wherein a first test switch is provided between the second terminal and the light emitting diode, and a second test switch is provided between the third terminal and the light emitting diode.

4. A phase reactor according to claim 1, wherein the first and second resistors are sliding varistors.

5. The phase reactor according to claim 1, wherein each LED is connected in parallel with a voltage regulator tube, and then connected in series with a voltage-stabilizing resistor to form a voltage-stabilizing LED unit.

6. The phase-locked loop of claim 5, wherein the voltage-stabilizing resistor is a carbon film resistor.

7. The phase reactor of claim 1, wherein the first DC power supply and the second DC power supply are equal in voltage.

8. The phase reactor of claim 7, wherein the voltage of each of the first DC power supply and the second DC power supply is less than 18V.

9. The phase detector of claim 1, wherein the testing device further comprises an and gate and a first indicator light, two input ends of the and gate are respectively connected with the first light emitting diode and the second light emitting diode, and an output end of the and gate is connected with the first indicator light.

10. A phase detector is characterized by comprising a power supply device and a test device,

the power supply device comprises a power supply group formed by connecting a first direct current power supply and a second direct current power supply in series, a third resistor, a fourth resistor, a first terminal, a second terminal and a third terminal, wherein the anode of the first direct current power supply is connected with the cathode of the second direct current power supply, the first terminal is connected with the cathode of the first direct current power supply, the second terminal is connected with the anode of the first direct current power supply and the cathode of the second direct current power supply through the third resistor, the third terminal is connected with the anode of the second direct current power supply through the fourth resistor,

the testing device comprises a first light-emitting diode, a second light-emitting diode, a third light-emitting diode, a fourth light-emitting diode, a first terminal, a second terminal and a third terminal, wherein the first terminal is respectively connected with the cathode of the first light-emitting diode and the anode of the third light-emitting diode, the second terminal is respectively connected with the cathode of the third light-emitting diode, the anode of the fourth light-emitting diode, the anode of the first light-emitting diode and the cathode of the second light-emitting diode, and the third terminal is respectively connected with the anode of the second light-emitting diode and the cathode of the fourth light-emitting diode;

Technical Field

The invention relates to a phase detector, in particular to a phase detector with an automatic judging function.

Background

The most important item in the power transmission and distribution cable handover test is the phase checking, the cable phase checking is the work of checking the phases at two ends of the cable before the cable is put into operation, the phase color bands are wrapped at two ends of the cable when the cable is laid, and the phase is confirmed through the phase color bands when the cable is installed and is connected with electrical equipment (such as GIS, a switch cabinet and a bus). If the phases of the two ends of the cable are not consistent, power transmission failure can be caused, and equipment explosion can be caused seriously.

The most common methods are insulation ohmmeters, multimeters, single-phase battery packs and the like.

For example, fig. 1 shows a mode of an insulation resistance meter, the cable 1 to be tested is included in fig. 1, single-phase matching is required, a yellow phase is taken as an example, the insulation resistance meter is used for pressurizing 5kV at a test end, and a green phase and a red phase are grounded at an opposite test end. The yellow phase, the green phase and the red phase are respectively boosted by using an insulation resistance meter, and the yellow phase can be proved to be correct if and only if the yellow phase voltage is 5kV and the insulation is good, and the insulation resistance and voltage of the green phase and the red phase are zero. And (5) repeatedly testing the green phase and the red phase, and finishing the test.

Phase checking defects of the insulation resistance meter:

1. the insulation resistance meter core needs to test the cable nine times, and the test process is complicated;

2. reliable real-time communication is needed for the insulation resistance meter core phase, and if one side of the insulation resistance meter core phase is positioned in an underground station, the test is blocked;

3. the insulation resistance meter nuclear phase test voltage is high, and the risk of hurting people exists;

4. the insulation resistance meter needs to discharge three phases every time the test is finished.

Fig. 2 shows a phase-checking method based on the phase-checking method of the phase-checking device: the yellow phase and the green phase are hung on the 3V battery pack at the opposite end of the cable, the yellow phase and the green phase are hung on the phase detector at the test end, and if and only if the connection line is correct and the pointer of the phase detector is deflected in the positive phase, the phase of the yellow phase and the phase of the green phase can be proved to be correct. And (5) repeatedly testing the phase correctness of the green phase and the red phase, and finishing the test.

The phase checking disadvantage of the basic phase checking device is as follows:

1. the nuclear phase device is a single-path test instrument, and only two nuclear phase devices can be tested each time;

2. only a yellow-green double-color line is arranged on the phase detector and the battery pack, if the yellow-red phase and the green-red phase need to be tested, the connection mode needs to be agreed in advance, otherwise, ambiguity can be caused;

3. the pointer type phase detector has high operation requirements on testers and needs special training.

No matter which phase checking mode is adopted, the requirement on the matching of the two sides of the cable is high, the cable is seriously dependent on wireless communication (interphone and mobile phone), and when a test point is positioned in an underground station, the communication is not smooth, so that the phase checking progress is slow; the conventional nuclear phase method has the advantages of 9 times of operation, low charge and discharge speed and long time.

Some upgraded nuclear cameras have been developed by those skilled in the art, but most of them still have inconvenient operation, need multiple operations, or have too complicated structure and insufficient portability.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a phase detector with an automatic judgment function.

The purpose of the invention can be realized by the following technical scheme:

a phase detector comprises a power supply device and a test device,

A first battery switch is arranged between the second wiring terminal and the power supply pack, and a second battery switch is arranged between the third wiring terminal and the power supply pack.

A first test switch is arranged between the second terminal and the light emitting diode, and a second test switch is arranged between the third terminal and the light emitting diode.

The first resistor and the second resistor are slide rheostats.

After each LED is connected with a voltage stabilizing tube in parallel, the LED is connected with a resistor for stabilizing voltage in series to form a voltage stabilizing LED unit.

The resistor for stabilizing voltage is a carbon film resistor.

The voltage of the first direct current power supply is equal to that of the second direct current power supply.

The voltage of the first direct current power supply and the voltage of the second direct current power supply are both smaller than 18V.

The voltage of the first direct current power supply and the voltage of the second direct current power supply are both 3V or 3.3V.

The testing device further comprises an AND gate and a first indicator light, two input ends of the AND gate are respectively connected with the first light emitting diode and the second light emitting diode, and an output end of the AND gate is connected with the first indicator light.

A phase detector comprises a power supply device and a test device,

Compared with the prior art, the invention has the following beneficial effects:

1) the operation time and operation error are greatly reduced, and the operation uncertainty is reduced by simplifying the operation time which is originally needed to be 9 times and the nuclear phase test to 1 time;

2) aiming at the traditional insulation resistance meter testing method, the process of charging the cable is avoided, and the danger of hurting people by high voltage is avoided by using 6V small voltage for testing; aiming at the test method of the single-phase detector, the problem of repeating three times is avoided, the phase detection is directly carried out on three phases, and the accuracy rate is 100%;

3) the phase condition is distinguished by using the on-off combination of 4 LEDs, and the operation process is convenient.

Drawings

FIG. 1 is a schematic diagram of a conventional insulation resistance meter type nuclear phase;

FIG. 2 is a schematic diagram of a conventional basic phase reactor;

FIG. 3 is a schematic structural view of the present invention;

FIG. 4 is a diagram of a display protection circuit according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of a logic decision circuit according to the present invention;

FIG. 6(a) is a schematic of the correct three-phase current;

FIG. 6(b) is a schematic diagram of the current at AB inverse;

FIG. 6(c) is a current schematic of BC inversion;

FIG. 6(d) is a current schematic of an AC inversion;

FIG. 6(e) is a schematic diagram of the current when three phases are totally inverted into BCA;

FIG. 6(f) is a schematic diagram of the current when three phases are fully inverted to CAB;

wherein: 1. tested cable, 2, power supply device, 3, testing device, 21, battery switch, 31, testing switch, E1, first direct current power supply, E2, second direct current power supply, D1, first light emitting diode, D2, second light emitting diode, D3, third light emitting diode, D4, fourth light emitting diode, R1, first resistor, R2, second resistor, R3, third resistor, R4 and fourth resistor.

Detailed Description

The invention is described in detail below with reference to the figures and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.

A phase detector, as shown in FIG. 3, includes a power supply device 2 and a test device 3,

the power supply device 2 comprises a power supply group formed by connecting a first direct current power supply E1 and a second direct current power supply E2 in series, a third resistor R3, a fourth resistor R4, a first terminal, a second terminal and a third terminal, wherein the positive pole of the first direct current power supply E1 is connected with the negative pole of the second direct current power supply E2, the first terminal is connected with the negative pole of the first direct current power supply E1, the second terminal is connected with the positive pole of the first direct current power supply E1 and the negative pole of the second direct current power supply E2 through the third resistor R3, the third terminal is connected with the positive pole of the second direct current power supply E2 through the fourth resistor R4,

the testing device 3 comprises a first light emitting diode D1, a second light emitting diode D2, a third light emitting diode D3, a fourth light emitting diode D4, a first terminal, a second terminal and a third terminal, wherein the first terminal is respectively connected with the cathode of the first light emitting diode D1 and the anode of the third light emitting diode D3, the second terminal is respectively connected with the cathode of the third light emitting diode D3, the anode of the fourth light emitting diode D4, the anode of the first light emitting diode D1 and the cathode of the second light emitting diode D2, and the third terminal is respectively connected with the anode of the second light emitting diode D2 and the cathode of the fourth light emitting diode D4;

the first wiring terminal, the second wiring terminal and the third wiring terminal are respectively connected with three phases at one end of the tested cable 1, the first terminal, the second terminal and the third terminal are respectively connected with three phases at the other end of the tested cable 1, and the connection condition of each terminal and the wiring terminals is identified through the lighting condition of four light-emitting diodes.

Specifically, the power supply device 2 may be a power supply box, the testing device 3 may be a testing box, the power supply box has three yellow-green-red leads as three terminals, which correspond to A, B, C in fig. 3, respectively, and the testing box also has three yellow-green-red leads as three terminals, so that when being connected with the tested cable 1, reliable and stable connection is ensured.

As shown in fig. 6(a), when the connection is correct, i.e. the first terminal, the second terminal and the third terminal are respectively connected with the first terminal, the second terminal and the third terminal through the tested cable 1, D1 and D2 are bright;

as shown in fig. 6(b), when AB is reversed, only D2 lights, as shown in fig. 6(c), when BC is reversed, only D1 lights, as shown in fig. 6(D), when AC is reversed, D1, D4 lights, when the three phases are totally reversed to BCA, that is: when the first terminal, the second terminal and the third terminal respectively correspond to the second terminal, the third terminal and the first terminal, only D4 is bright, as shown in FIG. 6(f), when the three phases are totally inverted to CAB, only D3 is bright.

As shown in fig. 5, since the lighting condition and the wiring condition are in a bidirectional functional relationship, it is possible to know whether the wiring is correct and the wrong point by one test from the lighting condition.

In other embodiments herein, R1 and R2 may not be present.

In other embodiments herein, R3 and R4 may not be present.

In another embodiment of the present application, the testing device 3 is equipped with a self-checking function, and when the self-checking switch is pressed, 4 leds all emit light, and the next step is entered without any problem after repeated testing.

In other embodiments of the present application, a first battery switch may be disposed between the second terminal and the power pack, and a second battery switch may be disposed between the third terminal and the power pack.

In other embodiments of the present application, the first resistor R1 and the second resistor R2 may be sliding varistors.

In other embodiments of the present application, after each led is connected in parallel with a voltage regulator tube, a resistor for voltage regulation is connected in series to form a voltage-regulated led unit.

In other embodiments of the present application, the voltage stabilizing resistor may be a carbon film resistor.

The voltages of the first dc power supply E1 and the second dc power supply E2 are equal. In other embodiments of the present application, the voltage of the first dc power source E1 and the voltage of the second dc power source E2 are both less than 18V, and preferably, the voltage of the first dc power source E1 and the voltage of the second dc power source E2 are both 3V or 3.3V, so that a power pack can be implemented by using 4 dry batteries or two AMS1117 modules, R3 and R4 are both 0.1 Ω, and R1 and R2 are 10k Ω at maximum.

In other embodiments of the present application, the testing device 3 further includes an and gate and a first indicator light, two input ends of the and gate are respectively connected to the first light emitting diode D1 and the second light emitting diode D2, and an output end of the and gate is connected to the first indicator light, preferably, two indicator lights may be provided, as shown in fig. 5, a logic gate circuit chip is used to control the nuclear phase indicator light, if the three phases are correct, the green light is on, and if there is an error, the red light is on. Specifically, the logical gate circuit takes the lamps 1 and 2 as input items, and is electrified to be 1 and not electrified to be 2. If and only if the input is "1, 1", a high level is output, a green light is triggered, and the phase is correct. The other five inputs output low level, and a red light is triggered to indicate phase error.

In other embodiments of the present application, as shown in fig. 4, there is also a display protection circuit.

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Take nuclear phase ware of automatic discrimination function

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