Phase recognizer testing device

Abstract

The invention discloses a phase recognizer testing device, which relates to the technical field of electrical tests and comprises a first light source, a second light source, a background screen and a testing device host. The phase recognizer testing device designed by the invention is simple in structure and quick to install, the testing device host can output two paths of alternating voltage, the two paths of voltage are mutually independent, and the magnitude and frequency of the voltage can be automatically adjusted as required; meanwhile, the phase between the two paths of voltage can be automatically adjusted, and a phase relation display test, a maximum phase rotation test and a frequency change influence test of the phase identifier can be realized through different test parameter setting and wiring; the test device can measure the input capacitive impedance or resistive impedance of the phase recognizer, can perform a clear visibility test of visual inspection display through the background screen, the light source I and the light source II, and is convenient to operate and high in test efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical testing, and particularly to a phase identifier testing device. Background Art

[0002] Phase identifiers are mainly installed in high-voltage switchgear, and their function is to give the phase relationship between two energized parts under the same nominal voltage and frequency before the two energized parts of the high-voltage power grid are connected. Simply put, it can help determine the phase of the power supply and detect whether two power supplies can be interconnected, which is an important device in the power industry. Whether the phase identifier can meet the relevant usage requirements needs to be verified through a series of tests.

[0003] Currently, there is no dedicated phase identifier testing device on the market. During testing, a variety of instruments need to be used for separate tests, such as using a phase meter, oscilloscope, ammeter, frequency meter, power meter, etc. for separate tests. However, separate tests with a variety of instruments have the disadvantages of inconvenient operation and low test efficiency, reducing the test efficiency.

[0004] Therefore, it is necessary to design a phase identifier testing device to solve the above problems. Summary of the Invention

[0005] The present invention provides a phase identifier testing device, which solves the above-mentioned technical problems.

[0006] 2. To solve the above technical problems, a phase identifier testing device provided by the present invention includes a first light source, a second light source, a background screen, and a testing device mainframe. The first light source and the second light source are respectively installed on the left and right sides in front of the testing device mainframe. The background screen is unfolded and installed at the rear end of the testing device mainframe. A phase identifier is arranged and installed in the front part of the background screen. A display control panel is provided at the front end of the first light source, and an output connection terminal is also provided at the front end of the first light source. The output connection terminal is connected to the input end of the phase identifier through a connecting wire;

[0007] A circuit system is provided inside the testing device mainframe. The circuit system is composed of a display control panel, an automatic control module, a power adjustment module, an impedance measurement module, a phase adjustment module, and a frequency adjustment module;

[0008] The overall control circuit of the circuit system includes a single-phase voltage regulator T1, a single-phase voltage regulator T2, a single-phase transformer T3, adjustable inductors L1 and L2, resistors R1, R2, R3, RA, and RB, capacitors CA and CB, ammeters AA and AB, a voltage adjustment module VT, a phase adjustment module CT, a frequency adjustment module FT, and an impedance measurement module CL. And through the overall control circuit, the circuit system can conduct phase relationship display and frequency change influence tests, maximum phase rotation tests, clear visibility tests for visual display, and impedance measurement tests for phase identifiers.

[0009] Further, the electrical connection of the phase relationship display and frequency change influence test includes connecting the input end of the single-phase voltage regulator T1 to the A-phase power supply of the mains, and the output end is connected to the frequency adjustment module FT through the adjustable inductor L1 and the resistor R1. The output of the frequency adjustment module FT is connected to output terminals A1 and A2; the input end of the single-phase voltage regulator T2 is connected to the B-phase power supply of the mains, and the output end is connected to the frequency adjustment module through the adjustable inductor L2 and the resistor R2. The output of the frequency adjustment module is connected to output terminals B1 and B2; the output terminals A1, A2, B1, and B2 are connected to the input end of the phase identifier 4 to be tested.

[0010] Further, the maximum phase rotation test is divided into the maximum phase rotation test of the capacitive sensing unit and the maximum phase rotation test of the resistive sensing unit.

[0011] Further, the electrical connection of the maximum phase rotation test of the capacitive sensing unit includes connecting output terminal A1 to the input end CA1 of capacitor CA, the output end CA2 of capacitor CA is connected to the input end AA1 of ammeter AA, output terminal B1 is connected to the input end CB1 of capacitor CB, the output end CB2 of capacitor CB is connected to the input end AB1 of ammeter AB, and the output terminal AA2 of ammeter AA, output terminal A2, the output terminal AB2 of ammeter AB, and output terminal B2 are respectively connected to the input end of the phase identifier to be tested.

[0012] Further, the electrical connection of the maximum phase rotation test of the resistive sensing unit includes connecting output terminal A1 to the input end RA1 of resistor RA, the output end RA2 of resistor RA is connected to the input end AA1 of ammeter AA, output terminal B1 is connected to the input end RB1 of resistor RB, the output end RB2 of resistor RB is connected to the input end AB1 of ammeter AB, and the output terminal AA2 of ammeter AA, output terminal A2, the output terminal AB2 of ammeter AB, and output terminal B2 are respectively connected to the input end of the phase identifier to be tested.

[0013] Further, the clear visibility test arrangement for visual inspection includes a background screen 3 with a diameter of 1 m and a reflectivity of 15% - 21%. The phase identifier 4 is 150 mm away from the background screen 3. The light source 1 and the light source 2 are set 1 m away from the phase identifier. The distance between the observer's forehead and the phase identifier (4) is 750 mm. The output terminals A1, A2, B1, and B2 are connected to the input terminals of the phase identifier to be tested.

[0014] Further, the electrical connection for the impedance measurement test of the phase identifier includes the C-phase power supply of the single-phase transformer T3 at the input end and an AC 5V voltage at the output end. Through measuring the resistor R3, it is connected to the output terminals CC1 and CC2, and the terminals are connected to the impedance measurement module CL. The impedance measurement module is connected to the output terminals CR1 and CR2.

[0015] Compared with the related art, a phase identifier test device provided by the present invention has the following beneficial effects:

[0016] The phase identifier test device designed by the present invention consists of a test device host, a background screen, a light source 1, a light source 2, and a phase identifier. It has a simple structure and quick installation. The test device host can output two paths of AC voltages, which are independent of each other. The voltage magnitude and frequency can be automatically adjusted according to needs; at the same time, the phase between the two paths of voltages can also be automatically adjusted. Through different test parameter settings and wiring, the phase relationship display test, maximum phase rotation test, and frequency change influence test of the phase identifier can be realized; the test device can measure the input capacitive impedance or resistive impedance of the phase identifier. The test device can conduct a clear visibility test for visual inspection through the configured background screen, light source 1, and light source 2, with convenient operation and high test efficiency. Description of the Drawings

[0017] Figure 1 is a simple schematic diagram of a phase identifier test device;

[0018] Figure 2 is a schematic diagram of the circuit system of a phase identifier test device;

[0019] Figure 3 is a schematic diagram of the overall control circuit of a phase identifier test device.

[0020] Reference numerals in the figure: 1, light source 1; 2, light source 2; 3, background screen; 4, phase identifier; 5, display control panel; 6, output wiring terminal; 7, test device host. Detailed Embodiments

[0021] Example, consisting of Figures 1-3Provided is a phase identifier test device, including a first light source 1, a second light source 2, a background screen 3, and a test device mainframe 7. The first light source 1 and the second light source 2 are respectively installed on the left and right sides in front of the test device mainframe 7. The background screen 3 is unfolded and installed at the rear end of the test device mainframe 7. A phase identifier 4 is arranged and installed at the front part of the background screen 3. A display control panel 5 is provided at the front end of the first light source 1, and an output terminal 6 is also provided at the front end of the first light source 1. The output terminal 6 is connected to the input end of the phase identifier 4 through a connecting wire;

[0022] A circuit system is provided inside the test device mainframe 7. The circuit system includes a display control panel 5, an automatic control module, a power adjustment module, an impedance measurement module, a phase adjustment module, and a frequency adjustment module;

[0023] The overall control circuit of the circuit system includes a single-phase voltage regulator T1, a single-phase voltage regulator T2, a single-phase transformer T3, adjustable inductors L1, L2, resistors R1, R2, R3, RA, RB, capacitors CA, CB, ammeters AA, AB, a voltage adjustment module VT, a phase adjustment module CT, a frequency adjustment module FT, and an impedance measurement module CL. And the circuit system can perform phase relationship display and frequency change influence tests, maximum phase rotation tests, visual display visibility tests, and phase identifier impedance measurement tests through the overall control circuit.

[0024] During the test, the phase identifier 4 to be tested is arranged in front of the background screen 3. According to different test requirements, the output terminals of the corresponding output terminal 6 of the test device mainframe 7 are connected to the phase identifier 4 to be tested, and the display control panel 5 is operated. As Figure 2 shown, the corresponding circuit modules are controlled through the automatic control module, and the test device mainframe 7 automatically completes the test and displays.

[0025] In this embodiment, the electrical connection of the phase relationship display and frequency change influence test includes the A-phase power supply of the municipal power supply at the input end of the single-phase voltage regulator T1, and the output end is connected to the frequency adjustment module FT through the adjustable inductor L1 and the resistor R1. The output of the frequency adjustment module FT is connected to the output terminal A1 and the output terminal A2; the B-phase power supply of the municipal power supply at the input end of the single-phase voltage regulator T2, and the output end is connected to the frequency adjustment module through the adjustable inductor L2 and the resistor R2. The output of the frequency adjustment module is connected to the output terminal B1 and the output terminal B2; the output terminal A1, the output terminal A2, the output terminal B1, and the output terminal B2 are connected to the input end of the phase identifier 4 to be tested.

[0026] Specifically, the test parameters are set according to the following requirements:

[0027] 1) The output voltage of voltage regulator T1 is 5V, and the output voltage of voltage regulator T2 is 30V. The frequency of both is set to 50Hz. Adjust the phase difference between the two voltages from 0 degrees to 10 degrees with an adjustment step of 2 degrees. If the phase discriminator under test shows "Phase relationship is correct" at this time, after 5 seconds, adjust the frequency of the two voltages from 49.9Hz to 50.1Hz with a change requirement of 1mHz / s. If the phase discriminator still shows "Phase relationship is correct", it indicates that the phase discriminator under test passes this sub-item test.

[0028] 2) The output voltage of voltage regulator T1 is 30V, and the output voltage of voltage regulator T2 is 5V. The frequency of both is set to 50Hz. Adjust the phase difference between the two voltages from 0 degrees to 10 degrees with an adjustment step of 2 degrees. If the phase discriminator under test shows "Phase relationship is correct" at this time, after 5 seconds, adjust the frequency of the two voltages from 49.9Hz to 50.1Hz with a change requirement of 1mHz / s. If the phase discriminator still shows "Phase relationship is correct", it indicates that the phase discriminator under test passes this sub-item test.

[0029] 3) The output voltage of voltage regulator T1 is 5V, and the output voltage of voltage regulator T2 is 30V. The frequency of both is set to 50Hz. Adjust the phase difference between the two voltages from 10 degrees to 60 degrees with an adjustment step of 2 degrees. If the phase discriminator under test shows "Phase relationship is incorrect" for the phase difference at this time, after 5 seconds, adjust the frequency of the two voltages from 49.9Hz to 50.1Hz with a change requirement of 10mHz / s. If the phase discriminator still shows "Phase relationship is incorrect", it indicates that the phase discriminator under test passes this sub-item test.

[0030] 4) The output voltage of voltage regulator T1 is 30V, and the output voltage of voltage regulator T2 is 5V. The frequency of both is set to 50Hz. Adjust the phase difference between the two voltages from 10 degrees to 60 degrees with an adjustment step of 2 degrees. If the phase discriminator under test shows "Phase relationship is incorrect" at this time, after 5 seconds, adjust the frequency of the two voltages from 49.9Hz to 50.1Hz with a change requirement of 10mHz / s. If the phase discriminator still shows "Phase relationship is incorrect", it indicates that the phase discriminator under test passes this sub-item test.

[0031] 5) The output voltage of voltage regulator T1 is 0V, and the output voltage of voltage regulator T2 is 30V. The frequency of both is set to 50Hz. Set the phase difference between the two voltages to 0 degrees. If the phase discriminator under test shows "Phase relationship is incorrect" at this time, it indicates that the phase discriminator under test passes this sub-item test.

[0032] 6) The output voltage of voltage regulator T1 is 30V, and the output voltage of voltage regulator T2 is 0V. The frequency of both is set to 50Hz. The phase difference between the two voltages is set to 0 degrees. If the phase discriminator under test displays "phase relationship error" at this time, it indicates that the phase discriminator under test passes this sub-item test.

[0033] 7) The output voltage of voltage regulator T1 is 3.6V, and the output voltage of voltage regulator T2 is 3.6V. The frequency of both is set to 50Hz. The phase difference between the two voltages is set to 70 degrees. If the phase discriminator under test does not display at this time, it indicates that the phase discriminator under test passes this sub-item test.

[0034] In this embodiment, the maximum phase rotation test is divided into the maximum phase rotation test of the capacitive sensing unit and the maximum phase rotation test of the resistive sensing unit.

[0035] Among them, as Figure 3 shown, the electrical connection of the maximum phase rotation test of the capacitive sensing unit includes that the output terminal A1 is connected to the input terminal CA1 of the capacitor CA, the output terminal CA2 of the capacitor CA is connected to the input terminal AA1 of the ammeter AA, the output terminal B1 is connected to the input terminal CB1 of the capacitor CB, the output terminal CB2 of the capacitor CB is connected to the input terminal AB1 of the ammeter AB, and the output terminal AA2 of the ammeter AA, the output terminal A2, the output terminal AB2 of the ammeter AB, and the output terminal B2 are respectively connected to the input terminal of the phase discriminator under test.

[0036] Specifically, set the test parameters according to the following requirements:

[0037] Adjust the output voltages of voltage regulator T1 and T2 so that the current values of ammeter AA1 and ammeter AA2 are 2.5 μA. The frequency of both is set to 50Hz. Adjust the phase difference between the two voltages from 10 degrees to 60 degrees, with an adjustment step of 2 degrees. If the phase discriminator under test displays "phase relationship error" at the phase difference at this time, it indicates that the phase discriminator under test passes this sub-item test.

[0038] Among them, as Figure 3 shown, the electrical connection of the maximum phase rotation test of the resistive sensing unit includes that the output terminal A1 is connected to the input terminal RA1 of the resistor RA, the output terminal RA2 of the resistor RA is connected to the input terminal AA1 of the ammeter AA, the output terminal B1 is connected to the input terminal RB1 of the resistor RB, the output terminal RB2 of the resistor RB is connected to the input terminal AB1 of the ammeter AB, and the output terminal AA2 of the ammeter AA, the output terminal A2, the output terminal AB2 of the ammeter AB, and the output terminal B2 are respectively connected to the input terminal of the phase discriminator under test.

[0039] Specifically, set the test parameters according to the following requirements:

[0040] Adjust the output voltages of voltage regulator T1 and T2 so that the current values of ammeters AA1 and AA2 are 2.5 μA, and both of their frequencies are set to 50 Hz. Adjust the phase difference between the two voltages from 10 degrees to 60 degrees, with an adjustment step of 2 degrees. At this time, if the phase difference display of the phase discriminator under test shows "phase relationship error", it indicates that the phase discriminator under test passes this sub-item test.

[0041] In this embodiment, as Figure 1 shown, the visible clarity test layout of the visual display includes a background screen 3 with a diameter of 1 m and a reflectivity of 15% - 21%. The phase discriminator 4 is 150 mm away from the background screen 3. The light source 1 and the light source 2 are set 1 m away from the phase discriminator. The distance between the observer's forehead and the phase discriminator 4 is 750 mm. The output terminals A1, A2, B1, and B2 are connected to the input terminals of the phase discriminator under test.

[0042] Specifically, during the test, connect the output terminals A1, A2, B1, and B2 to the input terminals of the phase discriminator under test respectively. The output voltage of voltage regulator T1 is 5 V, and the output voltage of voltage regulator T2 is 30 V. Both frequencies are set to 50 Hz. Set the phase difference between the two voltages to 0 degrees. During the test, randomly disconnect the output terminals A1 and A2, and then plug them in again, 5 times each, to achieve the purpose of disconnecting and connecting the test voltage. The display of the phase discriminator should be correctly perceived by the observer, indicating that the phase discriminator under test passes this sub-item test.

[0043] In this embodiment, the electrical connection of the impedance measurement test of the phase discriminator includes the C-phase power supply of the single-phase transformer T3 at the input end, and the output end is an AC 5 V voltage. Through the measurement resistor R3, it is connected to the output terminals CC1 and CC2, and the terminals are connected to the impedance measurement module CL. The impedance measurement module is connected to the output terminals CR1 and CR2.

[0044] Specifically, the impedance measurement module can measure the current and voltage of the circuit and convert the AC 5 V voltage into a DC 5 V voltage. During the test, since the impedance of the phase discriminator has two types: resistance and capacitance, and it is impossible to know the impedance type of the phase discriminator in advance before the test. During the test, connect the output terminals CR1 and CR2 to the input terminals of the phase discriminator under test. If the measured resistance and measured current can be displayed at this time, it indicates that the phase discriminator under test is of the resistance type, and the displayed value is the impedance of the phase discriminator under test; if the measured resistance and measured current are not displayed, it indicates that the phase discriminator under test is of the capacitance type, because the measured voltage is DC at this time, and no current will pass through the capacitive impedance. Next, connect the output terminals CC1 and CC2 to the input terminals of the phase discriminator under test, and the displayed value is the capacitive impedance value of the phase discriminator under test.

Claims

1. A phase recognition device test apparatus, comprising a light source 1 (1), a light source 2 (2), a background screen (3), and a test apparatus host (7), characterized in that: The light source one (1) and the light source two (2) are respectively installed on the left and right sides in front of the main body (7) of the test device, the background screen (3) is unfolded and installed at the rear end of the main body (7) of the test device, and a phase identifier (4) is arranged and installed in front of the background screen (3). A display control panel (5) is arranged at the front end of the light source one (1), and an output terminal (6) is also arranged at the front end of the light source one (1), and the output terminal (6) is connected to the input end of the phase identifier (4) through a connecting wire. The test device host (7) is internally provided with a circuit system, which comprises a display control panel (5), an automatic control module, a power supply adjustment module, an impedance measurement module, a phase adjustment module, and a frequency adjustment module; The overall control circuit of the circuit system includes a single-phase voltage regulator T1, a single-phase voltage regulator T2, a single-phase transformer T3, an adjustable inductor L1, an adjustable inductor L2, a resistor R1, a resistor R2, a resistor R3, a resistor RA, a resistor RB, a capacitor CA, a capacitor CB, an ammeter AA, an ammeter AB, a voltage adjustment module VT, a phase adjustment module CT, a frequency adjustment module FT, and an impedance measurement module CL. The circuit system can perform phase relationship display and frequency change influence tests, maximum phase rotation tests, visual display clarity visibility tests, and phase identifier impedance measurement tests through the overall control circuit.

2. A phase identifier test device according to claim 1, characterized in that: The electrical connection of the phase relationship display and frequency change impact test includes the input end of the single-phase voltage regulator T1, the mains A-phase power supply, and the output end is connected to the frequency adjustment module FT through the adjustable inductor L1 and the resistor R1, and the output of the frequency adjustment module FT is connected to the output terminal A1 and the output terminal A2; the input end of the single-phase voltage regulator T2, the mains B-phase power supply, and the output end is connected to the frequency adjustment module through the adjustable inductor L2 and the resistor R2, and the output of the frequency adjustment module is connected to the output terminal B1 and the output terminal B2; the output terminal A1, the output terminal A2, the output terminal B1, and the output terminal B2 are connected to the input end of the phase identifier (4) to be tested.

3. A phase identifier test device according to claim 1, characterized in that: The maximum phase rotation test is divided into a maximum phase rotation test of a capacitive sensing unit and a maximum phase rotation test of a resistive sensing unit.

4. A phase identifier test device according to claim 3, characterized in that: The maximum phase rotation test electrical connection of the capacitive sensing unit includes an output terminal A1 connected to the input terminal CA1 of the capacitor CA, an output terminal CA2 of the capacitor CA connected to the input terminal AA1 of the ammeter AA, an output terminal B1 connected to the input terminal CB1 of the capacitor CB, an output terminal CB2 of the capacitor CB connected to the input terminal AB1 of the ammeter AB, and an output terminal AA2, an output terminal A2 of the ammeter AA, an output terminal AB2, and an output terminal B2 of the ammeter AB are respectively connected to the input terminal of the phase identifier to be tested.

5. A phase identifier test device according to claim 3, characterized in that: The electrical connection of the maximum phase rotation test of the resistive sensing unit includes an output terminal A1 connected to the input end RA1 of the resistor RA, the output end RA2 of the resistor RA is connected to the input end AA1 of the ammeter AA, the output terminal B1 is connected to the input end RB1 of the resistor RB, the output end RB2 of the resistor RB is connected to the input end AB1 of the ammeter AB, and the output terminal AA2, output terminal A2 of the ammeter AA, the output end AB2 and output terminal B2 of the ammeter AB are respectively connected to the input end of the phase identifier to be tested.

6. A phase identifier test device according to claim 1, characterized in that: The visual display visibility test arrangement includes a background screen (3) having a diameter of 1 meter and a reflectivity of 15% to 21%, a phase identifier (4) being 150 mm away from the background screen (3), light source 1 (1) and light source 2 (2) being 1 meter away from the phase identifier, a distance of 750 mm between the observer's forehead and the phase identifier (4), and output terminals A1, A2, B1 and B2 being connected to the input end of the phase identifier to be tested.

7. A phase identifier test device according to claim 1, characterized in that: The electrical connection of the phase identifier impedance measurement test includes a single-phase transformer T3 input end with a C-phase power supply, an AC 5V voltage at the output end, connected to output terminals CC1 and CC2 through a measuring resistor R3, and the terminals are connected to an impedance measurement module CL, which is connected to output terminals CR1 and CR2.

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