Safety protection device for power frequency withstand voltage test against electric arc flashover

Abstract

The utility model provides a kind of safety protection device of power frequency withstand voltage test of arc flash, it is related to power frequency withstand voltage test technical field, including operation plate;The front side of the operation plate is installed with emergency control panel near the position of bottom end, and the front side of operation plate is installed with LED digital display near the position of top end;The inside of table base is installed with high voltage test transformer near the position of right end, and the inside of table base is installed with test instrument control machine near the position of left end, and the inside of table base is installed with electric pressure regulator in central position;Through the setting of test instrument control machine, electric pressure regulator and emergency control panel, after the leakage current of product in test exceeds rated value, automatic or manual mode control test instrument control machine and electric pressure regulator are realized to work in the mode of voltage reduction, solve the problem that traditional power frequency withstand voltage test does not have the function of emergency automatic release of the voltage of the tested product, reduce the personal safety level in the process of power frequency withstand voltage test.

Description

Technical Field

[0001] This utility model belongs to the field of power frequency withstand voltage test technology, and more specifically, it relates to a safety protection device for power frequency withstand voltage test that prevents arc flashover. Background Technology

[0002] Power frequency withstand voltage testing is a crucial test for motor manufacturers and users to inspect the insulation performance of motor components and finished products. The quality of this test directly impacts the reliability and safety of the motor. Currently, traditional power frequency withstand voltage tests lack an automatic emergency voltage release function for the tested product. When the leakage current exceeds the rated value, the voltage cannot be automatically or manually released, severely reducing the safety of operators during power frequency withstand voltage testing and increasing the risk of electric shock. Utility Model Content

[0003] To address the aforementioned technical problems, this utility model provides a power frequency withstand voltage test safety protection device to prevent arc flashover, thereby solving the problem that the traditional power frequency withstand voltage test lacks an emergency automatic voltage release function for the tested product, which reduces the level of personal safety during the power frequency withstand voltage test.

[0004] This utility model provides a power frequency withstand voltage test safety protection device for preventing electric arc flashover, including a table; a table base is welded to the rear end of the table, a grounding base plate is welded to the lower side of the table base, and a hinged door is hinged to the front side of the table base; it also includes an operation panel; a touch screen display is installed on the front side of the operation panel, and near the bottom of the front side of the operation panel are an on / off control panel, a voltage adjustment panel, an emergency control panel, and a power indicator panel; near the top of the front side of the operation panel is an LED digital display, and near the right end of the front side of the operation panel is a print button and a printer; at the center of the front side of the operation panel is an initial value setting panel and a voltage output interface; a panel frame is welded to the upper side of the table base, an alarm light is installed on the upper side of the panel frame, and the operation panel is bolted to the front side of the panel frame; a high-voltage test transformer is installed near the right end of the inner side of the table base, a test instrument control unit is installed near the left end of the inner side of the table base, and an electric voltage regulator is installed at the center of the inner side of the table base.

[0005] In at least some embodiments, the on / off control panel is equipped with an on / off control button and an automatic / manual switching knob on the front side. The on / off control button is connected to the test instrument controller via a wire, and the automatic / manual switching knob switches the test instrument controller between manual and automatic modes.

[0006] In at least some embodiments, the voltage adjustment panel has a boost button and a buck button installed from left to right on the front side.

[0007] In at least some embodiments, an alarm bell and an emergency button are mounted on the front side of the emergency control panel from left to right.

[0008] In at least some embodiments, a 220V power indicator and a 380V power indicator are mounted on the front side of the power indicator panel from left to right.

[0009] In at least some embodiments, the number of LED digital displays is three groups, which are arranged equidistantly from left to right. The leftmost LED digital display displays the selected test time, the middle LED digital display displays the leakage current generated by the test sample during the high-voltage test, and the rightmost LED digital display displays the preset value of the test voltage when setting and the actual test voltage during the test.

[0010] In at least some embodiments, the initial value setting panel is equipped with a decrease button, a set button, and an increase button from left to right.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] 1. In this utility model, the primary input voltage of the high-voltage test transformer is adjusted by an electric voltage regulator to regulate the high-voltage output of the entire machine. After the voltage rises to the rated test value at a certain rate, the test time is displayed on an LED digital display. At the end of the test, the electric voltage regulator reduces the voltage to zero at the same rate. When the leakage current of the product exceeds the rated value during the test, the test instrument controller automatically cuts off the high voltage, and the electric voltage regulator automatically reduces the voltage to zero. At the same time, an electric bell alarms and an alarm indicator light illuminates. In addition, the machine is equipped with an emergency button. The emergency button controls the test instrument controller to manually release the voltage of the tested product through a wire. When the leakage current exceeds the rated value, the test instrument controller and the electric voltage regulator automatically and manually discharge, which greatly improves the personal safety protection performance of the test instrument for the test operator and reduces the risk of electric shock to the operator. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model.

[0014] Figure 2 This is a front view structural diagram of this utility model.

[0015] Figure 3 This is a schematic diagram of the left-side structure of this utility model.

[0016] Figure 4 This is a front view structural diagram of the open state of this utility model.

[0017] Figure 5 This is a schematic diagram of the left side view of this utility model.

[0018] Figure 6 This is the utility model Figure 5 Enlarged structural diagram of part A in the middle.

[0019] Figure 7 This is a schematic diagram of the principle of this utility model.

[0020] Attached reference numerals: 1. Grounding base plate; 2. Table base; 3. Panel frame; 4. Operation panel; 5. Tabletop; 6. Flip-up door; 7. Touch screen display; 8. Electric voltage regulator; 9. High-voltage test transformer; 10. Test instrument control unit; 11. On / off control panel; 12. Voltage adjustment panel; 13. Emergency control panel; 14. Power indicator panel; 15. On / off control button; 16. Automatic / manual switching knob; 17. Boost button; 18. Deboost button; 19. Alarm bell; 20. Emergency button; 21. 220V power indicator light; 22. 380V power indicator light; 23. LED digital display; 24. Initial value setting panel; 25. Decrease button; 26. Set button; 27. Increase button; 28. Print button; 29. ​​Printer; 30. Alarm light; 31. Voltage output interface. Detailed Implementation

[0021] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0022] like Figures 1-7 As shown, this utility model provides a power frequency withstand voltage test safety protection device for preventing electric arc flashover, including a table 5; a table base 2 is welded to the rear end of the table 5, a grounding base plate 1 is welded to the lower side of the table base 2, and a hinged door 6 is hinged to the front side of the table base 2; it also includes an operation panel 4; a touch display 7 is installed on the front side of the operation panel 4, and an on / off control panel 11, a voltage adjustment panel 12, an emergency control panel 13, and a power indicator panel 14 are installed near the bottom of the front side of the operation panel 4; an LED digital display 23 is installed near the top of the front side of the operation panel 4. A print button 28 and a printer 29 are installed on the front side of the control panel 4 near the right end. An initial value setting panel 24 and a voltage output interface 31 are installed at the center of the front side of the control panel 4. A panel frame 3 is welded to the upper side of the table base 2. An alarm light 30 is installed on the upper side of the panel frame 3. The control panel 4 is connected to the front side of the panel frame 3 by bolts. A high-voltage test transformer 9 is installed on the inner side of the table base 2 near the right end. A test instrument control unit 10 is installed on the inner side of the table base 2 near the left end. An electric voltage regulator 8 is installed at the center of the inner side of the table base 2.

[0023] In this embodiment, the on / off control panel 11 is equipped with an on / off control button 15 and an automatic / manual switching knob 16 on the front side. The on / off control button 15 is connected to the test instrument controller 10 through a wire. The on / off control button 15 controls the power supply of the test instrument controller 10 to be turned on and off through the wire. The automatic / manual switching knob 16 switches the test instrument controller 10 between manual and automatic modes.

[0024] In this embodiment, a boost button 17 and a buck button 18 are installed on the front side of the voltage adjustment panel 12 from left to right. Pressing the boost button 17 will increase the output voltage, and releasing it will stop the boost. If the experiment is in the initial state, pressing the test instrument control unit 10 will start the test instrument control unit 10 to control the electric voltage regulator 8 through the wire to adjust the high voltage output of the high voltage test transformer 9. If the voltage needs to be reduced during the experiment, the buck button 18 can be pressed. The buck button 18 controls the electric voltage regulator 8 through the wire to adjust the high voltage test transformer 9 for manual voltage reduction adjustment.

[0025] In this embodiment, an alarm bell 19 and an emergency button 20 are installed on the front side of the emergency control panel 13 from left to right. When the leakage current is too large during the test, the test instrument controller 10 controls the alarm bell 19 to start sounding an alarm through the wire. If the emergency button 20 is pressed, the emergency button 20 controls the test instrument controller 10 to cut off all high voltage output / stop the sound of the bell through the wire and controls the alarm light 30 to turn off through the wire.

[0026] In this embodiment, a 220V power indicator light 21 and a 380V power indicator light 22 are installed on the front side of the power indicator panel 14 from left to right. When the input power is 220V, the test instrument controller 10 controls the 220V power indicator light 21 to light up through a wire. When the input power is 380V, the test instrument controller 10 controls the 380V power indicator light 22 to light up through a wire, so that the test personnel can clearly and explicitly know the voltage value of the power supply.

[0027] In this embodiment, there are three sets of LED digital displays 23, which are arranged equidistantly from left to right. The leftmost LED digital display 23 displays the selected test time in a countdown manner. The test is completed when the time drops to zero. The middle LED digital display 23 displays the leakage current generated by the test sample during the high-voltage test. The rightmost LED digital display 23 displays the preset value of the test voltage when setting it and displays the actual test voltage during the test. This makes it easy for the test personnel to clearly and accurately know the test time, test voltage and leakage current values.

[0028] In this embodiment, the initial value setting panel 24 is equipped with a decrease button 25, a setting button 26, and an increase button 27 from left to right. Pressing the decrease button 25 causes the test instrument controller 10 to adjust the initial values ​​of the test time, leakage current, test voltage, etc. by decreasing via a wire. Pressing the increase button 27 causes the test instrument controller 10 to adjust the initial values ​​of the test time, leakage current, test voltage, etc. by increasing via a wire. Pressing the setting button 26 causes the test instrument controller 10 to confirm and set the adjustment values ​​of the test time, leakage current, and test voltage via a wire.

[0029] The specific usage and function of this embodiment are as follows:

[0030] Connect the high-voltage terminal of the voltage output interface 31 and the low-potential terminal of the grounding base plate 1 to the phase terminals and the casing of the motor under test respectively via wires to enter the withstand voltage test state. Rotate the on / off control button 15 to the "on" position. The on / off control button 15 controls the power supply of the test instrument control unit 10 through the wires. If the power supply is 220V, the test instrument control unit 10 controls the 220V power indicator light 21 to light up through the wires. If the power supply is 380V, the test instrument control unit 10 controls the 380V power indicator light 22 to light up through the wires. At the same time, the test instrument control unit 10 controls the alarm light 30 to light up and rotate through the wires. The alarm light 30 indicates that the high-voltage zone is working. Then, perform the initial setting of the test state. Press the setting button 26 once. At this time, the test voltage value is set. Use the decrease button 25 and the increase button 27 to set the test voltage value. Press the setting button 26 again, and use the decrease button 25 and increase button 27 to set the leakage current value; press the setting button 26 again, and use the decrease button 25 and increase button 27 to set the test time. After setting, the test can be carried out. Then, press the voltage increase button 17 or the voltage decrease button 18. The voltage increase button 17 or the voltage decrease button 18 controls the test instrument controller 10 through the wire. The test instrument controller 10 controls the electric voltage regulator 8 to automatically increase to the preset value of the test voltage. The timer inside the test instrument controller 10 starts counting down and displays the countdown on the LED digital display 23 that displays the test time. When the timer reaches zero, the electric voltage regulator 8 automatically reduces the voltage to half voltage, cutting off the high voltage. After the test, press the print button 28. The print button 28 controls the test instrument controller 10 to start via a wire. The test instrument controller 10 controls the printer 29 to output the test results via a wire. If the tested motor breaks down within the test time, the test instrument controller 10 controls the alarm bell 19 to sound an alarm via a wire, and the alarm light 30 rotates and flashes. The test instrument controller 10 controls the electric voltage regulator 8 to automatically cut off the high voltage and return to zero via a wire. Alternatively, the emergency button 20 can be pressed to silence the alarm bell 19 and return the voltage to zero.

[0031] The technical solution of this utility model is not limited to the scope of the embodiments of this utility model. All technical contents not described in detail in this utility model are known technologies.

Claims

1. A power frequency withstand voltage test safety protection device for preventing electric arc flashover, comprising a table (5); a table base (2) is welded to the rear end of the table (5), a grounding base plate (1) is welded to the lower side of the table base (2), and a hinged door (6) is hinged to the front side of the table base (2); characterized in that: It also includes an operation panel (4); a touch display (7) is installed on the front side of the operation panel (4), an on / off control panel (11), a voltage adjustment panel (12), an emergency control panel (13) and a power indicator panel (14) are installed on the front side of the operation panel (4) near the bottom, an LED digital display (23) is installed on the front side of the operation panel (4) near the top, a print button (28) and a printer (29) are installed on the front side of the operation panel (4) near the right end, an initial value setting panel (24) and a voltage output interface (31) are installed on the front side of the operation panel (4); a panel frame (3) is welded to the upper side of the table base (2), an alarm light (30) is installed on the upper side of the panel frame (3), the operation panel (4) is connected to the front side of the panel frame (3) by bolts, a high voltage test transformer (9) is installed on the inner side of the table base (2) near the right end, a test instrument control machine (10) is installed on the inner side of the table base (2) near the left end, and an electric voltage regulator (8) is installed on the inner side of the table base (2).

2. The power frequency withstand voltage test safety protection device for preventing arc flashover as described in claim 1, characterized in that: The on / off control panel (11) is equipped with an on / off control button (15) and an automatic / manual switching knob (16) on the front side. The on / off control button (15) is connected to the test instrument controller (10) via a wire, and the automatic / manual switching knob (16) switches the test instrument controller (10) between manual and automatic modes.

3. The power frequency withstand voltage test safety protection device for preventing arc flashover as described in claim 1, characterized in that: The voltage adjustment panel (12) has a boost button (17) and a buck button (18) installed on the front side from left to right.

4. The power frequency withstand voltage test safety protection device for preventing arc flashover as described in claim 1, characterized in that: The front side of the emergency control panel (13) is equipped with an alarm bell (19) and an emergency button (20) from left to right.

5. The power frequency withstand voltage test safety protection device for preventing arc flashover as described in claim 1, characterized in that: The power indicator panel (14) has a 220V power indicator (21) and a 380V power indicator (22) installed on the front side from left to right.

6. The power frequency withstand voltage test safety protection device for preventing arc flashover as described in claim 1, characterized in that: The number of LED digital displays (23) is three sets. The three sets of LED digital displays (23) are arranged equidistantly from left to right. The leftmost LED digital display (23) displays the selected test time, the middle LED digital display (23) displays the leakage current generated by the test sample during the high voltage test, and the rightmost LED digital display (23) displays the preset value of the test voltage when setting and the actual test voltage during the test.

7. The power frequency withstand voltage test safety protection device for preventing arc flashover as described in claim 1, characterized in that: The initial value setting panel (24) is equipped with a decrease button (25), a set button (26), and an increase button (27) from left to right.

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