CN214669510U - Simple load detection instrument - Google Patents
Simple load detection instrument Download PDFInfo
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- CN214669510U CN214669510U CN202120684039.5U CN202120684039U CN214669510U CN 214669510 U CN214669510 U CN 214669510U CN 202120684039 U CN202120684039 U CN 202120684039U CN 214669510 U CN214669510 U CN 214669510U
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Abstract
The utility model provides a simple load detection instrument, belongs to the technical field of load detection instruments, and aims to solve the problem that the maintenance of a direct-current switching power supply on a train is inconvenient when the direct-current switching power supply on the train accidentally fails in the daily maintenance process of a motor train unit; the high-power voltage meter comprises a shell, an electronic voltmeter, a change-over switch, a high-power resistor and a female plug, wherein the electronic voltmeter, the change-over switch, the high-power resistor and the female plug are arranged in the shell; the female plug is provided with a positive wire end and a negative wire end, and the positive wire end is connected with a protection fuse in series; the protection fuse is connected with the change-over switch in series; the change-over switch is provided with a first connecting end, a second connecting end and a third connecting end; the first connecting end is not provided with a load, the second connecting end is connected to the high-power resistor in a half-load mode, and the third connecting end is connected to the high-power resistor in a full-load mode; two ends of the electronic voltmeter are respectively and electrically connected with the positive line end and the negative line end of the female plug; the utility model discloses a design need not external power supply and can use, is convenient for daily on-the-spot maintenance and fault diagnosis.
Description
Technical Field
The utility model relates to a load detection instrument technical field specifically is a simple and easy load detection instrument.
Background
In the daily maintenance process of the motor train unit, when the direct current switching power supply on the train is in accidental fault, the universal meter is used for detecting the condition that misjudgment exists, the direct current electronic load detector on the current market is not suitable for on-site maintenance and fault judgment, the direct current electronic load on the current market mostly needs to use an external power supply to supply power to work, and the daily on-site maintenance and fault judgment are inconvenient.
SUMMERY OF THE UTILITY MODEL
The technique that exists is not enough to the aforesaid, the utility model aims at providing a simple and easy load detecting instrument need not external power supply and can use, the daily on-the-spot maintenance of being convenient for and failure diagnosis.
In order to solve the technical problem, the utility model adopts the following technical scheme:
a simple load detection instrument is characterized by comprising a shell, an electronic voltmeter, a change-over switch, a high-power resistor and a female plug, wherein the electronic voltmeter, the change-over switch, the high-power resistor and the female plug are arranged in the shell; the female plug is provided with a positive wire end and a negative wire end, and the positive wire end is connected with a protection fuse in series; the protection fuse is connected with the change-over switch in series; the change-over switch is provided with a first connecting end, a second connecting end and a third connecting end; the first connecting end is not provided with a load, the second connecting end is connected to the high-power resistor in a half-load mode, and the third connecting end is connected to the high-power resistor in a full-load mode; and two ends of the electronic voltmeter are respectively and electrically connected with the positive line end and the negative line end of the female plug.
The beneficial effects of the utility model reside in that: the utility model discloses a design need not external power supply and can use, is convenient for daily on-the-spot maintenance and fault diagnosis.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a simple load detection instrument according to an embodiment of the present invention;
fig. 2 is a block diagram of a circuit structure of a simple load detection instrument according to an embodiment of the present invention.
Description of reference numerals:
change over switch 1, electron voltmeter 2, high-power resistance 3, shell 4, female first plug 5.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
It should be noted that in the description of the present invention, the terms "in", "up", "down", "horizontal", "inner", etc. indicate directions or positional relationships based on those shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may include, for example, a fixed connection, a detachable connection, or an integral connection; may be a mechanical connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
As shown in fig. 1 to 2, a simple load detection instrument comprises a housing 4, a two-wire electronic voltmeter 2, a change-over switch 1, a high-power resistor 3 and a delta-shaped three-core female plug 5, wherein the two-wire electronic voltmeter 2, the change-over switch 1, the high-power resistor 3 and the delta-shaped three-core female plug are arranged in the housing 4; the female plug 5 is provided with a positive wire end and a negative wire end, and the positive wire end is connected with a protection fuse in series; the protective fuse is connected in series with the change-over switch 1; the change-over switch 1 is provided with a first connecting end, a second connecting end and a third connecting end; the first connecting end is not provided with a load, the second connecting end is connected to the high-power resistor 3 in a half-load mode, and the third connecting end is connected to the high-power resistor 3 in a full-load mode; the resistance value of the high-power resistor 3 is calculated through the nominal value of the actual direct-current switching power supply; two ends of the electronic voltmeter 2 are respectively and electrically connected with the positive line end and the negative line end of the female plug 5; the output end of the detected direct current switch power supply is connected into a male plug through a connecting wire, and the male plug is inserted into a switch-on circuit in the female plug 5; switching selection under three load conditions is carried out through the change-over switch 1; the voltage stabilization conditions of the detected direct current switching power supply in the no-load, half-load and full-load states are monitored through the electronic voltmeter 2 to judge whether the direct current switching power supply fails.
It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (1)
1. A simple load detection instrument is characterized by comprising a shell, an electronic voltmeter, a change-over switch, a high-power resistor and a female plug, wherein the electronic voltmeter, the change-over switch, the high-power resistor and the female plug are arranged in the shell; the female plug is provided with a positive wire end and a negative wire end, and the positive wire end is connected with a protection fuse in series; the protection fuse is connected with the change-over switch in series; the change-over switch is provided with a first connecting end, a second connecting end and a third connecting end; the first connecting end is not provided with a load, the second connecting end is connected to the high-power resistor in a half-load mode, and the third connecting end is connected to the high-power resistor in a full-load mode; and two ends of the electronic voltmeter are respectively and electrically connected with the positive line end and the negative line end of the female plug.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120684039.5U CN214669510U (en) | 2021-04-02 | 2021-04-02 | Simple load detection instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120684039.5U CN214669510U (en) | 2021-04-02 | 2021-04-02 | Simple load detection instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214669510U true CN214669510U (en) | 2021-11-09 |
Family
ID=78458742
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120684039.5U Active CN214669510U (en) | 2021-04-02 | 2021-04-02 | Simple load detection instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214669510U (en) |
-
2021
- 2021-04-02 CN CN202120684039.5U patent/CN214669510U/en active Active
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