Simple low-current line selection device tester

Abstract

The utility model discloses a simple low-current line selection device tester, which comprises a shell, a cover body and an electrical element, the cover body covers the shell in a sliding manner to form a cavity for installing the electrical element, so that the cover body is pulled from one side to the other side to open or close an opening side; the electrical element comprises a button, a transformer, a capacitor and a wiring terminal; according to the utility model, the structure is simple, the housing and the cover body are matched to form the chamber for mounting the electrical elements, the cover body is of a pull-out structure, so that the cover body can be quickly opened and closed and locked through the lock catch, and the electrical elements comprise the button, the transformer, the capacitor and the wiring terminal; the small-current grounding line selection alarm condition is generated in the loop through the characteristics of the capacitor, so that the small-current grounding line selection device acts, whether the small-current grounding line selection device works normally or not is checked, and the small-current grounding line selection alarm device is simple, rapid and convenient to carry.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of circuit detection, in particular to a simple and small current line selection device inspection instrument. BACKGROUND

[0002] Small current grounding line selection device is a kind of equipment for power system, mainly used to accurately and quickly select grounding line when single-phase grounding fault occurs.This device plays a very important role in power system, and can improve the safety and stability of power system.

[0003] Since the inspection period of small current grounding line selection device is long, the reliable line selection of the device cannot be effectively guaranteed during inspection, which forms a safety hazard to power supply line, and there is also an inspection device for whether the grounding line selection device is safe in the prior art, but most of the structures are relatively complex, and the use cost is also relatively high. UTILITY MODEL CONTENT

[0004] The technical problem to be solved by the utility model is that the existing inspection device has complex structure and high use cost.

[0005] To solve the above technical problems, a technical scheme is provided by the utility model, which is a simple and small current line selection device inspection instrument, including shell, cover and electrical element, the cover is arranged on the shell to form a cavity for installing the electrical element, characterized in that: the cover is a rectangular structure with an open top, and any two opposite edges of the open side are provided with limit plates extending horizontally outward, a U-shaped groove capable of being sleeved on the limit plate is formed in the corresponding position of the cover, and the cover is pulled from one side to the other side to open or close the open side.

[0006] The electrical element includes button, transformer, capacitor and terminal, the button is fixed on the shell, and the button is connected in series with the primary side of the transformer, one side of the terminal and the capacitor is connected in series with the secondary side of the transformer, the other side of the other group of terminal ports of the terminal is connected in parallel with the capacitor, and the other side of the two groups of terminal ports of the terminal is connected with the external lead wire penetrating the shell.

[0007] Further, the air switch is connected in series between the primary side of the transformer and the external lead wire, and the cover is provided with an observation window corresponding to the air switch.

[0008] Further, one side of the cover in the pulling direction is provided with a limit rod, and the shell corresponding to the limit rod is provided with a lock catch and an avoiding opening.

[0009] Further, one side of the shell corresponding to the lock catch is protruded upward.

[0010] Further, the shell and the cover are made of stainless steel, and the shell is provided with a handle.

[0011] The utility model has the advantages of:

[0012] The application has simple structure, and forms a cavity for electrical element installation through cooperation of the shell and the cover, the pull-out type structure of the cover is convenient for quick opening and closing, and is locked through a lock catch, and since the electrical element includes a button, a transformer, a capacitor and a terminal, a small current grounding line selection alarm condition is generated in a loop through the characteristics of the capacitor, so that the small current grounding line selection device is actuated, thereby completing inspection of whether the small current grounding line selection device works normally, which is simple, quick and convenient to carry.

[0013] In order to make the above and other objects, features and advantages of the utility model more obvious and easy to understand, the following preferred embodiments are described in detail below, and the accompanying drawings are described as follows. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical scheme of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment description, and obviously, the following description of the drawings is only six of the utility model, and for those skilled in the art, other drawings can be obtained according to these drawings without creative labor.

[0015] Figure 1 It is a structural schematic view of the application.

[0016] Figure 2 It is a structural schematic view of the cover sliding.

[0017] Figure 3 It is a structural schematic view of the cover opening.

[0018] Figure 4 It is a structural schematic view of the electrical element fixed in the shell.

[0019] Figure 5 It is a circuit diagram.

[0020] In the drawing, 1 is a shell, 2 is a cover, 3 is a limiting plate, 4 is a U-shaped groove, 5 is a button, 6 is a transformer, 7 is a capacitor, 8 is a terminal, 9 is an external lead, 10 is an air switch, 11 is an observation window, 12 is a limiting rod, 13 is an avoiding opening, 14 is a handle, and 15 is a lock catch. DETAILED DESCRIPTION

[0021] Embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. While some embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the present invention. It should be understood that the accompanying drawings and embodiments of the present invention are for illustrative purposes only and are not intended to limit the scope of protection of the present invention.

[0022] It should be understood that the steps described in the method embodiments of this utility model may be performed in different orders and / or in parallel. Furthermore, the method embodiments may include additional steps and / or omit the steps shown. The scope of this utility model is not limited in this respect.

[0023] The names of the messages or information exchanged between the multiple devices in this embodiment of the invention are for illustrative purposes only and are not intended to limit the scope of these messages or information. Example

[0024] like Figures 1-5 As shown, a simple low-current line selection device tester includes a housing 1, a cover 2, and electrical components. The cover 2 is placed on the housing 1 to form a chamber for installing the electrical components. The cover 2 is a rectangular structure with an opening on the upper side, and two opposite sides of the opening side are provided with outwardly extending horizontally extending limiting plates 3. A U-shaped groove 4 is formed inwardly at the corresponding position on the cover 2, which can slide on the limiting plate 3, so that the cover 2 can be pulled from one side to the other to open or close the opening side. The U-shaped groove 4 cooperates with the limiting plate 3 to ensure that the cover 2 can only slide horizontally on the housing 1, solving the problem of the cover 2 flipping upward and occupying the upper space. This sliding structure is simple to manufacture and can be integrally formed with the cover 2 and the housing 1, which is low in cost and high in efficiency.

[0025] The electrical components include a button 5, a transformer 6, a capacitor 7 and a terminal 8, the button is fixed on the shell 1, and the button is in series with a primary side of the transformer 6, one side of a group of terminal ports of the capacitor 7 and the terminal 8 is in series with a secondary side of the transformer 6, the other side of the group of terminal ports of the terminal 8 is in parallel with the capacitor 7, and the other side of the two groups of terminal ports of the terminal 8 and the primary side of the transformer 6 are connected with an external lead 9 penetrating through the shell 1; the electrical components are simple in structure, when the external lead 9 is connected into a detection loop of a small current grounding line selection device, an alarm condition (one is a zero sequence voltage greater than a setting value, two is a zero sequence current greater than the setting value, three is a 90° phase relationship between the zero sequence current and the zero sequence voltage, one or more of which can be simulated, as long as the small current grounding line selection device can be actuated) of the small current grounding line selection is formed in the detection loop by using the characteristics of the capacitor 7, so that the small current grounding line selection device is actuated, thereby completing the test of whether the small current grounding line selection device works normally, which is simple, fast and low in cost.

[0026] The air switch 10 is connected in series between the primary side of the transformer 6 and the external lead 9, so as to ensure the safety in use; the side of the cover 2 in the pulling direction is provided with a limiting rod 12, the shell 1 is provided with a lock catch 15 and an avoiding opening 13 corresponding to the limiting rod 12, when the limiting rod 12 moves into the chamber through the avoiding opening 13 along with the cover 2, the lock catch 15 is rotated to be overlapped with the limiting rod 12 by rotating the lock core with a key, so as to limit the limiting rod 12 and lock the cover 2 on the shell 1; the shell 1 and the cover 2 are made of stainless steel, which is convenient to make and low in cost, and the shell 1 is provided with a handle 14, so as to be convenient to carry. Embodiment

[0027] As shown in Figures 1-5 the embodiment, the embodiment is obtained by adding the technical features such as the observation window 11 on the basis of the first embodiment, and the remaining technical features are the same as those of the first embodiment, and the same parts will not be described herein, wherein the embodiment and the first embodiment are different in that the cover 2 is provided with the observation window 11 corresponding to the air switch 10, and the side of the shell corresponding to the lock catch 15 is protruded upward.

[0028] In the embodiment, the observation window 11 can observe the switch position of the air switch 10, so as to be convenient for personnel to observe whether the external power supply is connected, the side of the shell corresponding to the lock catch 15 is protruded upward, so as to limit the insertion position of the cover 2, when the cover 2 is inserted and contacted with the side of the shell protruded upward, it indicates that the cover 2 has been installed in place, and the limiting rod 12 can be directly locked by the lock catch 15.

[0029] In use, the application is installed and operated in cooperation with a small current grounding line selection device, and personnel regularly operate to ensure normal operation of the small current grounding line selection device; specifically, the operation process is as follows: the external lead wire 9 connected with the primary side of the transformer 6 is connected with an external 220V power supply to supply power to the transformer 6 (220V alternating current is converted into 24V through the transformer 6), the external lead wire 9 connected with the wiring terminal 8 is connected into a detection loop of the small current grounding line selection device, the button 5 is pressed, the charge and discharge characteristics of the capacitor 7 are utilized, an alarm condition of small current grounding line selection is formed in the detection loop, so that the small current grounding line selection device is actuated, and thus the test of whether the small current grounding line selection device works normally is completed, which is simple, fast and low in cost.

[0030] It should be noted that the above are only the preferred embodiments of the present application and the technical principles applied. Those skilled in the art will understand that the present application is not limited to the specific embodiments herein, and those skilled in the art can make various obvious changes, re-adjustments and substitutions without departing from the protection scope of the present application. Therefore, although the present application has been described in more detail through the above embodiments, the present application is not limited to the above embodiments, and more other equivalent embodiments can be included without departing from the concept of the present application, and the scope of the present application is determined by the scope of the appended claims.

Claims

1. A simple low current line selection device tester, comprising a housing, a cover and electrical components, the cover is covered on the housing to form a cavity for mounting the electrical components, characterized in that: The cover is a rectangular structure with an open upper side, and opposite edges of the open side are provided with outwardly horizontally extending limiting plates, a U-shaped slot capable of being slidably sleeved on the limiting plates is formed in a corresponding position on the cover, and the cover is pulled from one side to the other side to open or close the open side. The electrical elements include a button, a transformer, a capacitor and a terminal, the button is fixed on the shell, the button is in series with a primary side of the transformer, one side of a group of terminal ports of the capacitor and the terminal is in series with a secondary side of the transformer, the other side of the other group of terminal ports of the terminal is in parallel with the capacitor, and the other side of the two groups of terminal ports of the terminal and the primary side of the transformer are connected with external wires penetrating through the shell.

2. The simple low current selector device tester according to claim 1, characterized in that: An air switch is connected in series between the primary side of the transformer and the external wires, and an observation window corresponding to the air switch is formed on the cover.

3. The simple low current selector device tester according to claim 2, characterized in that: A limiting rod is arranged on one side of the cover in the pulling direction, and a lock catch and an avoiding opening corresponding to the limiting rod are arranged on the shell.

4. The simple low current selector device tester according to claim 3, characterized in that: One side of the shell corresponding to the lock catch is protruded upward.

5. The simple low current selector device tester according to claim 4, characterized in that: The shell and the cover are made of stainless steel, and a handle is arranged on the shell.

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