Discharging and electricity testing device for capacitor bank
By designing a capacitor bank discharge and testing device, using the combination of a red meter pen, a black meter pen, a discharge and testing unit and a conversion switch, the problems of complex operation and low safety of the discharge device in the prior art are solved, and efficient and safe discharge and testing functions are achieved.
Patent Information
- Application Number
- CN202420516550.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-15
- Publication Date
- 2025-03-07
- Estimated Expiration
- 2034-03-15
AI Technical Summary
The existing capacitor bank discharge device operates in a complex manner, has low safety, has a long discharge time, is not thorough in discharge, and cannot effectively know the remaining power after discharge, which poses a major safety hazard.
A capacitor bank discharge power test device is designed, including a red meter pen, a black meter pen, a discharge power test unit and a conversion switch. Through the separation design of the discharge circuit and the power test circuit, the rapid switching of the discharge and power test functions is achieved to ensure safety.
It improves the working efficiency of discharge and power inspection, ensures the safety of test personnel and devices, and can timely grasp the discharge status of the capacitor bank, avoiding safety hazards.
Smart Images
Figure CN222580194U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of electric power equipment discharge devices, in particular to a capacitor bank discharge and electricity testing device. Background Art
[0002] With the rapid development of new energy and energy storage industries, in high-power equipment such as energy storage inverters, when the capacitor group completes the charging test, the high-voltage residual power at both ends is difficult to release effectively, and the discharge process requires the help of discharge tools.
[0003] In the prior art, discharge devices such as discharge rods are usually used to discharge capacitor banks. However, such discharge devices have a series of technical problems during the discharge process, such as complex operation, low safety, long discharge time, incomplete discharge, and inability to effectively know the remaining power after discharge, which poses considerable safety hazards to both test personnel and equipment. Utility Model Content
[0004] In view of the shortcomings of the above-mentioned prior art, the utility model provides a capacitor bank discharge and electricity testing device, which solves the technical problems of low working efficiency, poor discharge effect and great safety hazards when the discharge device in the prior art discharges the capacitor bank.
[0005] The utility model provides a capacitor bank discharge and electricity testing device, comprising: a red test lead, a black test lead, a discharge and electricity testing unit and a conversion switch;
[0006] The contact of the red test lead is connected to the positive terminal of the capacitor group to be discharged, and the contact of the black test lead is connected to the negative terminal of the capacitor group to be discharged;
[0007] The discharge and electricity testing unit comprises a discharge circuit and an electricity testing circuit, wherein the first end of the discharge circuit is connected to the red test lead, the second end of the discharge circuit is connected to the first contact of the conversion switch, the first end of the electricity testing circuit is connected to the red test lead, the second end of the electricity testing circuit is connected to the second contact of the conversion switch, and the common end of the conversion switch is connected to the black test lead;
[0008] When the common end of the conversion switch is connected to the first contact of the conversion switch, the discharge circuit is used to discharge the capacitor bank to be discharged;
[0009] When the common end of the conversion switch is connected to the second contact of the conversion switch, the power detection circuit is used to detect the remaining power of the capacitor group to be discharged.
[0010] Optionally, the discharge circuit includes a time-delay closing relay and a discharge resistor;
[0011] The first end of the time-delay closing relay is connected to the red test lead, the second end of the time-delay closing relay is connected to the first end of the discharge resistor, and the second end of the discharge resistor is connected to the first contact of the conversion switch.
[0012] Optionally, an arc extinguishing grid assembly is provided in the delayed closing relay.
[0013] Optionally, the power testing circuit includes a voltmeter, and the voltmeter is used to display the remaining power of the capacitor group to be discharged.
[0014] Optionally, the power testing circuit further includes an indicator light, and the indicator light is connected in series with the voltmeter;
[0015] When there is remaining power in the capacitor bank to be discharged, the indicator light comes on.
[0016] Optionally, the device further comprises a detection control unit;
[0017] The first end of the detection control unit is connected to the discharge circuit, and the second end of the detection control unit is connected to the conversion switch;
[0018] When the detection control unit detects that there is residual electricity in the capacitor group to be discharged, the detection control unit controls the common end of the conversion switch to be connected to the first contact of the conversion switch.
[0019] Optionally, a fuse is connected between the red test lead and the discharge electrical testing unit.
[0020] Optionally, the capacitor bank discharge and electricity testing device further includes an outer shell;
[0021] The discharge and electrical testing unit is arranged in the outer shell, and the discharge and electrical testing unit is connected to the inner cavity of the outer shell through an insulating material.
[0022] Optionally, the outer shell is connected to an alligator clip, and the alligator clip is connected to a ground terminal.
[0023] Optionally, the contact of the red test lead and the contact of the black test lead are both made of a low-impedance conductor material, and the shape of the contact of the red test lead and the contact of the black test lead are both hemispherical.
[0024] The capacitor bank discharge and electricity testing device provided by the utility model effectively combines the discharge function and the electricity testing function, and cooperates with the use of a conversion switch to realize fast switching between the discharge function and the electricity testing function, thereby improving the working efficiency of the test, and on the other hand, the discharge and electricity testing unit separates the discharge circuit and the electricity testing circuit, thereby ensuring the safety of the test personnel and the use of the device; the electricity testing circuit is used to detect the remaining power of the capacitor bank to be discharged after discharge, so that the staff can timely and comprehensively grasp the discharge status of the capacitor bank to avoid potential safety hazards.
[0025] Other features and advantages of the utility model will be described in the subsequent description, and partly become apparent from the description, or understood by practicing the utility model. The purpose and other advantages of the utility model can be realized and obtained by the structures specifically pointed out in the written description, claims, and drawings.
[0026] The technical solution of the utility model is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:
[0028] Figure 1 A schematic diagram of the structure of a capacitor bank discharge and electricity testing device in one embodiment provided in the present application;
[0029] Figure 2 A circuit schematic diagram of a capacitor bank discharge and electrical testing device in one embodiment provided in the present application.
[0030] In the figure:
[0031] 1. Red test lead; 101. Contact of red test lead; 2. Black test lead; 201. Contact of black test lead; 3. Conversion switch; 4. Delay closing relay; 5. Discharge resistor; 6. Voltmeter; 7. Indicator light; 8. Fuse. DETAILED DESCRIPTION
[0032] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0033] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.
[0034] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0035] The utility model provides a capacitor bank discharge test device, such as Figure 1 As shown, it includes a red test lead 1, a black test lead 2, a discharge test unit and a conversion switch 3, wherein the contact 101 of the red test lead is connected to the positive terminal of the capacitor group to be discharged, and the contact 201 of the black test lead is connected to the negative terminal of the capacitor group to be discharged; the discharge test unit includes a discharge circuit and a test circuit, the first end of the discharge circuit is connected to the red test lead 1, the second end of the discharge circuit is connected to the first contact of the conversion switch 3, the first end of the test circuit is connected to the red test lead 1, the second end of the test circuit is connected to the second contact of the conversion switch 3, and the common end of the conversion switch 3 is connected to the black test lead 2; when the common end of the conversion switch 3 is connected to the first contact of the conversion switch 3, the capacitor group discharge test device is used to discharge the capacitor group to be discharged; when the common end of the conversion switch 3 is connected to the second contact of the conversion switch 3, the capacitor group discharge test device is used to detect the remaining power of the capacitor group to be discharged.
[0036] The capacitor bank discharge and electricity testing device provided by the utility model effectively combines the discharge function and the electricity testing function, and cooperates with the use of the conversion switch 3 to realize the rapid switching of the discharge function and the electricity testing function, thereby improving the working efficiency of the test; on the other hand, the discharge and electricity testing unit separates the discharge circuit and the electricity testing circuit, thereby ensuring the safety of the test personnel and the use of the device; the electricity testing circuit is used to detect the remaining power of the capacitor bank to be discharged after discharge, so that the staff can timely and comprehensively grasp the discharge status of the capacitor bank to avoid potential safety hazards.
[0037] Specifically, in the above embodiment, Figure 2 As shown, the discharge circuit includes a delayed closing relay 4 and a discharge resistor 5; the first end of the delayed closing relay 4 is connected to the red test lead 1, the second end of the delayed closing relay 4 is connected to the first end of the discharge resistor 5, and the second end of the discharge resistor 5 is connected to the first contact of the conversion switch 3.
[0038] In this embodiment, the discharge circuit includes a delayed closing relay 4 and a discharge resistor 5 connected in series, wherein the delayed closing relay 4 is provided to ensure that the device has a delay time before the discharge operation is performed, ensure that the operator has enough time to prepare, and avoid sudden discharge to cause safety hazards to the device or the operator, thereby enhancing the safety of the device operation; the introduction of the discharge resistor 5 can limit the size of the discharge current. Specifically, the discharge resistor 5 uses a high-power discharge resistor that can withstand high-power discharge and effectively limit the current size when the capacitor group is discharged, thereby protecting the capacitor group and the device from damage by excessive current, extending the service life of the device, and reducing maintenance and replacement costs. The coordinated use of the delayed closing relay 4 and the discharge resistor 5 can ensure the smooth discharge process of the device, avoid the risk of unstable operation or damage to the capacitor group due to sudden current changes, and improve the controllability and stability of the operation. The design of the discharge circuit can ensure that the discharge process of the device is completed efficiently and quickly, improve the efficiency of the discharge operation, and thus improve the overall work efficiency of the device.
[0039] Furthermore, an arc extinguishing grid component is provided in the delayed closing relay 4 .
[0040] In this embodiment, the arc extinguishing grid assembly can effectively eliminate the arc generated between the contact 101 of the red test lead, the contact 201 of the black test lead and the terminals of the delayed closing relay 4, thereby protecting the device from damage caused by the arc, helping to extend the service life of the delayed closing relay 4 and the device, and improving the reliability and safety of the device; the use of the arc extinguishing grid assembly can effectively maintain the stability and reliability of the operation of the delayed closing relay 4, reduce the unstable factors caused by the arc, and thus improve the performance and efficiency of the equipment.
[0041] Specifically, in the above embodiment, Figure 2As shown, the electric test circuit includes a voltmeter 6, which is used to display the remaining power of the capacitor bank to be discharged.
[0042] In this embodiment, a voltmeter 6 is provided in the electric test circuit. The voltmeter 6 displays the remaining power of the capacitor group to be discharged, so that the current power state of the capacitor group to be discharged can be clearly understood, which is convenient for making corresponding operation decisions, that is, how to discharge the capacitor group. Knowing the remaining power of the capacitor group in time can avoid the operator from performing discharge operations when the power of the capacitor group is too high, thereby reducing the safety risks caused by accidental discharge. By detecting the power of the capacitor group, not only can it be understood whether the capacitor group needs to be discharged and the capacitor group can be avoided from being damaged due to excessive power, but it can also help the operator to reasonably manage the power of the capacitor group to be discharged, avoid excessive discharge or charging, extend the service life of the capacitor group to be discharged and the device, and reduce maintenance and replacement costs.
[0043] Further, such as Figure 2 As shown, the power testing circuit also includes an indicator light 7, which is connected in series with the voltmeter 6; when there is residual electricity in the capacitor group to be discharged, the indicator light 7 lights up.
[0044] In this embodiment, the indicator light 7 is on to intuitively inform the operator that there is residual power in the capacitor bank to be discharged and it has not been fully discharged. The operator can know the status of the capacitor bank without checking the voltmeter 6, which improves the convenience and efficiency of operation, reduces operational errors caused by negligence, and improves the safety of operation; and when the voltmeter 6 fails or is unavailable, the indicator light 7 can still provide information about the remaining power of the capacitor bank as a backup detection method, ensuring timely monitoring of the status of the capacitor bank to be discharged and improving the fault tolerance of the device operation.
[0045] Specifically, in the above embodiment, the device also includes a detection control unit; the first end of the detection control unit is connected to the power testing circuit, and the second end of the detection control unit is connected to the conversion switch 3; when the detection control unit detects that there is residual power in the capacitor group to be discharged, the detection control unit controls the common end of the conversion switch 3 and the first contact of the conversion switch 3 to be turned on.
[0046] In this embodiment, a detection control unit is introduced into the device and connected to the conversion switch 3 and the power testing circuit respectively, so as to detect the power situation in the capacitor group and realize automatic control of the conversion switch 3 according to the detection result, thereby simplifying the operation process; specifically, when the detection control unit detects that there is residual power in the capacitor group to be discharged, it immediately controls the common terminal of the conversion switch 3 to be connected with the first contact, reconnects the discharge circuit, ensures timely response to the capacitor group to be discharged, and performs further discharge operation on the capacitor group to be discharged according to actual conditions, thereby reducing the safety risks that may be caused by excessive power in the capacitor group to be discharged.
[0047] Specifically, in the above embodiment, a fuse 8 is connected between the red test lead 1 and the discharge test unit.
[0048] In this embodiment, the fuse 8 can melt when the current exceeds the set threshold value, preventing overload current from flowing through the circuit, thereby protecting the red test lead 1 and the discharge test unit from damage. Especially in the discharge operation, since there may be a high voltage in the capacitor group to be discharged, if the current is too large, it may damage the related equipment. The presence of the fuse 8 can effectively prevent this from happening. It can be seen that the setting of the fuse 8 can cut off the circuit when the current is abnormal, avoid damage to the device due to overload current, extend the service life of the device, and enhance the reliability of the use of the red test lead 1 and the discharge test unit.
[0049] Specifically, in the above embodiment, the capacitor bank discharge test device further includes an outer shell; the discharge test unit is arranged in the outer shell, and the discharge test unit is connected to the inner cavity of the outer shell through an insulating material.
[0050] In this embodiment, the outer shell provides physical protection for the discharge test unit, prevents it from being damaged or interfered with by the external environment, ensures that the device can operate normally in various working environments, and improves its applicability and reliability; placing the discharge test unit in the outer shell can effectively reduce the risk of the operator contacting high-voltage components and improve the safety of operation; installing the discharge test unit in the outer shell can effectively fix and stabilize the equipment structure and reduce the possibility of equipment damage or misoperation due to external vibration or movement, and the use of insulating materials effectively isolates the discharge test unit from the inner cavity of the outer shell, prevents the high voltage generated during the discharge of the capacitor group from direct contact with the outer shell, avoids possible electric shock or leakage hazards, and ensures the safety of the operator.
[0051] Furthermore, the outer shell is connected with an alligator clip, and the alligator clip is connected to the ground terminal.
[0052] In this embodiment, the alligator clip is connected to the ground terminal, which can effectively ground the outer shell. Through protective grounding measures, any leakage on the outer shell can be safely released to the protective ground, and unnecessary charges can be released to the ground. At the same time, it can also effectively eliminate or reduce the influence of static electricity, avoid operational risks caused by static electricity accumulation, reduce the risk of electric shock when using the device, ensure the safety of the device during use, and improve the safety of the operator.
[0053] Specifically, in the above embodiment, the contact 101 of the red test lead and the contact 201 of the black test lead are both made of low-impedance conductor materials, and the shapes of the contact 101 of the red test lead and the contact 201 of the black test lead are both hemispherical.
[0054] In this embodiment, the contact 101 of the red test lead and the contact 201 of the black test lead are both made of low-impedance conductor material, which can ensure good electrical conductivity and reduce resistance loss during measurement, thereby improving the accuracy and reliability of measurement. Low-impedance conductor materials usually have good antioxidant properties, can maintain good electrical conductivity for a long time, and are not prone to oxidation or surface contamination, thereby ensuring the stability and durability of the test; the hemispherical contact shape can provide a wider contact area, so that the contact between the contact and the capacitor group to be discharged is more firm and stable, reducing poor contact and improving the accuracy and reliability of measurement. The hemispherical contact shape usually has good wear resistance and can maintain a good contact state during frequent use, reducing measurement errors caused by contact wear and extending the service life of the test equipment. At the same time, the design of the hemispherical contact makes it easier to find a suitable contact position during testing, thereby improving the user's operating efficiency and convenience.
[0055] The process of the capacitor bank discharge and electricity testing device provided in the present application for discharging and testing the capacitor bank to be discharged is as follows:
[0056] First, the tester connects the outer shell of the device to the protective ground through an alligator clip, and then turns on the delayed closing relay 4. After that, the tester holds the pen holders of the red test lead 1 and the black test lead 2 in his left and right hands respectively, and makes the contact 101 of the red test lead and the contact 201 of the black test lead reliably contact the positive terminal and the negative terminal of the capacitor group to be discharged and tested. At this time, the common end of the conversion switch 3 is connected to the first contact, and the discharge circuit in the discharge test unit is connected to the loop, waiting for the delayed closing relay 4 to close before the discharge is completed.
[0057] After the discharge is completed, the tester switches the conversion switch 3, connects the common end of the conversion switch 3 to the second contact, connects the test circuit in the discharge test unit to the loop, and detects the remaining power of the capacitor group through the status of the indicator light 7 and the display value of the voltmeter 6.
[0058] If the capacitor bank to be discharged has not been completely discharged, the tester manually switches the conversion switch 3 or automatically connects the common end of the conversion switch 3 to the second contact through the detection control unit, connects the test circuit in the discharge test unit to the loop to discharge again, and then switches the conversion switch 3 again to check the remaining power through the test circuit in the discharge test unit until the capacitor bank to be discharged is completely discharged.
[0059] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.
Claims
1. A capacitor bank discharge test device, characterized in that: include: A red test lead (1), a black test lead (2), a discharge test unit and a conversion switch (3); The contact point (101) of the red test lead is connected to the positive terminal of the capacitor group to be discharged, and the contact point (201) of the black test lead is connected to the negative terminal of the capacitor group to be discharged; The discharge and electricity testing unit comprises a discharge circuit and an electricity testing circuit, wherein the first end of the discharge circuit is connected to the red test lead (1), the second end of the discharge circuit is connected to the first contact of the conversion switch (3), the first end of the electricity testing circuit is connected to the red test lead (1), the second end of the electricity testing circuit is connected to the second contact of the conversion switch (3), and the common end of the conversion switch (3) is connected to the black test lead (2); When the common end of the conversion switch (3) is connected to the first contact of the conversion switch (3), the discharge circuit is used to discharge the capacitor group to be discharged; When the common end of the conversion switch (3) is connected to the second contact of the conversion switch (3), the power detection circuit is used to detect the remaining power of the capacitor group to be discharged.
2. The capacitor bank discharge test device according to claim 1, characterized in that: The discharge circuit comprises a time-delay closing relay (4) and a discharge resistor (5); The first end of the delayed closing relay (4) is connected to the red test lead (1), the second end of the delayed closing relay (4) is connected to the first end of the discharge resistor (5), and the second end of the discharge resistor (5) is connected to the first contact of the conversion switch (3).
3. The capacitor bank discharge test device according to claim 2, characterized in that: An arc extinguishing grid component is arranged in the delayed closing relay (4).
4. The capacitor bank discharge test device according to claim 1, characterized in that: The electric power testing circuit comprises a voltmeter (6), and the voltmeter (6) is used to display the remaining power of the capacitor group to be discharged.
5. The capacitor bank discharge test device according to claim 4, characterized in that: The electric test circuit also includes an indicator light (7), and the indicator light (7) is connected in series with the voltmeter (6); When there is residual electricity in the capacitor bank to be discharged, the indicator light (7) lights up.
6. The capacitor bank discharge test device according to claim 1, characterized in that: The device also includes a detection control unit; The first end of the detection control unit is connected to the electric test circuit, and the second end of the detection control unit is connected to the conversion switch (3); When the detection control unit detects that there is residual electricity in the capacitor group to be discharged, the detection control unit controls the common end of the conversion switch (3) to be connected to the first contact of the conversion switch (3).
7. The capacitor bank discharge test device according to claim 1, characterized in that: A fuse (8) is connected between the red test lead (1) and the discharge test unit.
8. The capacitor bank discharge test device according to claim 1, characterized in that: The capacitor bank discharge and electricity testing device also includes an outer shell; The discharge and electrical testing unit is arranged in the outer shell, and the discharge and electrical testing unit is connected to the inner cavity of the outer shell through an insulating material.
9. The capacitor bank discharge test device according to claim 8, characterized in that: The outer shell is connected with an alligator clip, and the alligator clip is connected to the ground terminal.
10. The capacitor bank discharge test device according to claim 1, characterized in that: The contact point (101) of the red test lead and the contact point (201) of the black test lead are both made of a low-impedance conductor material, and the shape of the contact point (101) of the red test lead and the contact point (201) of the black test lead are both hemispherical.