CN211786056U - Insulation monitoring test device of direct current system - Google Patents
Insulation monitoring test device of direct current system Download PDFInfo
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- CN211786056U CN211786056U CN201922369938.1U CN201922369938U CN211786056U CN 211786056 U CN211786056 U CN 211786056U CN 201922369938 U CN201922369938 U CN 201922369938U CN 211786056 U CN211786056 U CN 211786056U
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Abstract
The utility model discloses an insulation monitoring test device of direct current system, including shell, anodal test wire, negative pole test wire and simulation test circuit, the simulation test circuit is connected with anodal test wire, negative pole test wire, and the simulation test circuit includes analog resistor, and analog resistor is located the shell, all extends to outside the shell with the negative pole test wire. The utility model arranges the analog resistor in the shell by arranging the shell, so that the pins of the analog resistor are not exposed and leaked, and the risk of electric shock and the breakage of the pins are effectively avoided; meanwhile, the positive electrode test wire and the negative electrode test wire extend out of the shell, the lead does not need to be reconnected, the lead is prevented from falling off, and the device can be widely applied to the technical field of detection.
Description
Technical Field
The utility model belongs to the technical field of the detection technique and specifically relates to a direct current system's insulation monitoring test device.
Background
In an electric power system, a direct current system is a power source for providing direct current power for various signal equipment, protection, automatic devices, emergency lighting and breaker opening and closing operations of a whole transformer substation (power plant), and faults of the direct current system directly and seriously endanger the safe and stable operation of a power grid. When the positive pole of the direct current system is grounded, the possibility of protection misoperation can be caused, when the negative pole of the direct current system is grounded, the possibility of protection operation rejection can be caused, and in order to avoid the situation, generally, each set of direct current system is provided with one set of insulation monitoring device, the insulation situation of the direct current system is detected, and an alarm is given.
In order to verify the normal operation of the insulation monitoring device, the insulation monitoring device is tested, and the current test mode is to use a simulation resistor to test in a mode that one end of a lead is connected to a direct current feeder branch circuit and the other end of the lead is connected to the ground. The resistance pin of the analog resistor is short, a lead needs to be connected in each test, the lead is easy to fall off, and meanwhile, the analog resistor pin is exposed, so that electric shock risk and breakage are easy to occur.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model aims to provide a: the insulation monitoring test device of the direct current system is safe and convenient.
The utility model adopts the technical proposal that: the utility model provides an insulation monitoring test device of direct current system, includes shell, anodal test wire, negative pole test wire and simulation test circuit, and simulation test circuit is connected with anodal test wire, negative pole test wire, and simulation test circuit includes analog resistor, and analog resistor is located the shell, and all extend to outside the shell with the negative pole test wire.
Furthermore, the simulation test circuit comprises a connecting module, one end of the connecting module is connected with the simulation resistor, the other end of the connecting module is connected with the positive test wire or the negative test wire, and the connecting module comprises a change-over switch and a display module.
Further, the display module comprises a first light emitting diode, the change-over switch comprises a first switch, and the first switch is connected with the first light emitting diode.
Further, the display module comprises a second light emitting diode, the change-over switch comprises a second switch, the second switch is connected with the second light emitting diode, and the light emitting colors of the first light emitting diode and the second light emitting diode are different.
Further, the display module comprises a second light emitting diode, the change-over switch comprises a second switch, and the second switch is connected with the second light emitting diode.
Further, the transfer switch includes a third switch, and the third switch is a disconnection switch.
Further, the transfer switch is exposed to the housing.
Furthermore, the simulation test circuit comprises a first light emitting diode and a second light emitting diode, and the first light emitting diode and the second light emitting diode are exposed out of the shell.
Further, the positive test line or the negative test line is a standard electric power test line.
The utility model has the advantages that: by arranging the shell, the analog resistor is arranged in the shell, so that pins of the analog resistor are not exposed and leaked, and the risk of electric shock and the breakage of the pins are effectively avoided; meanwhile, the positive electrode test wire and the negative electrode test wire extend out of the shell, the lead does not need to be reconnected, and the condition that the lead falls off is avoided.
Drawings
Fig. 1 is a block diagram of the insulation monitoring test device of the dc system of the present invention;
fig. 2 is a schematic diagram of an analog test circuit according to the present invention;
fig. 3 is a diagram of the relationship between the device and the dc system during the test of the present invention.
Detailed Description
The invention will be further explained and explained with reference to the drawings and the embodiments in the following description.
Referring to fig. 1, an embodiment of the present invention provides an insulation monitoring test device for a dc system, which includes a housing, an anode test line, a cathode test line, and a simulation test circuit; the shell is made of insulating materials.
In this embodiment, the positive test line and the negative test line both adopt a single standard power test line with a model of CXC-2.5, one end of the positive test line and one end of the negative test line are connected to the analog test circuit, and the other end of the positive test line and the other end of the negative test line are both extended out of the housing, when the length of the test line is insufficient, the standard power test line can be connected to the connector end, and a phi 2 × 18mm needle-shaped plug, a 5mm crocodile clip, a 10mm crocodile clip, a 20mm crocodile clip and the like can be connected to the connector according to a use scene.
The analog test circuit comprises an analog resistor R and a connecting module, the connecting module comprises a change-over switch QS and a display module, and the analog resistor R is located in the shell.
The changeover switch QS comprises a first switch, a second switch and a third switch, the changeover switch QS is exposed out of the shell, specifically protrudes out of the shell, and is used for a user to rotate left and right to control the first switch, the second switch and the third switch to be switched on and off so as to select the test circuit, and the third switch is a circuit breaker.
The display module includes a first light emitting diode D1 and a second light emitting diode D2, in this embodiment, the first light emitting diode D1 and the second light emitting diode D2 are exposed from the housing, and the manner of exposing from the housing may be: the first light emitting diode D1 and the second light emitting diode D2 protrude out of the housing, or the housing is made of transparent material or has through holes corresponding to the first light emitting diode D1 and the second light emitting diode D2, so that the emitted light can be observed by a user. The first light emitting diode D1 is a light emitting diode having a red light emission color, and the second light emitting diode D2 is a light emitting diode having a green light emission color.
Therefore, the connection relationship between the analog test circuit and the anode test line and the cathode test line is as follows: one end of the connecting module is connected with the analog resistor R, and the other end of the connecting module is connected with the anode test wire or the cathode test wire. That is, as shown in fig. 2, one end of the analog resistor R may be connected to the positive test line, the other end of the analog resistor R may be connected to one end of the connection module, and the other end of the connection module may be connected to the negative test line; or one end of the analog resistor R is connected with the negative electrode test wire, the other end of the analog resistor R is connected with one end of the connecting module, and the other end of the connecting module is connected with the positive electrode test wire. The positions of the changeover switch QS and the display module can also be adjusted, as shown in fig. 2, or the positions can be changed so that one end of the display module is connected with the analog resistor R, and the changeover switch QS is connected with the negative electrode test line; meanwhile, the positions of the anode test line and the cathode test line can be adjusted, and the current flowing from the anode test line firstly passes through the anode of the first light-emitting diode D1 or the anode of the second light-emitting diode D2 only when the anode test line is connected with the anode of the direct current system.
Specifically, in this embodiment, as shown in fig. 2, one end of the positive test line is connected to one end of the analog resistor R, the other end of the analog resistor R is connected to one ends of the first switch, the second switch, and the third switch, the other end of the first switch is connected to the anode of the first light emitting diode D1, the other end of the second switch is connected to the anode of the second light emitting diode D2, the cathodes of the first light emitting diode D1 and the second light emitting diode D2 are connected to the negative test line, and the other end of the third switch is open-circuited.
Referring to fig. 2 and 3, in this embodiment, the device is used in cooperation with a dc system and an insulation monitoring device for testing, the dc system and the insulation monitoring device are prior art, and therefore, they are not described again, and the working principle of the device during testing is as follows: for an insulation monitoring test of a 110V/220V direct current system, before the test, a change-over switch QS is turned on a stop position (a third switch is closed), so that a 3 rd contact and a 4 th contact are communicated; when an anode simulation grounding test is carried out, the joint end of an anode test wire of the device is connected to the anode of a 110V/220V direct current system, the joint end of a cathode test wire is grounded, when a cathode simulation grounding test is carried out, the joint end of a cathode test wire is connected to the cathode of the 110V/220V direct current system, the joint end of the anode test wire is grounded, and a change-over switch QS is switched into a 110V/220V test loop; after the test is finished, a changeover switch QS of the device is turned to a middle stop position, so that the device is disconnected with a 110V/220V direct current system. When a 110V direct current system is tested, the change-over switch is rotated to the left, so that the first switch is closed, the 1 st contact and the 2 nd contact are connected, and the first light-emitting diode D1 emits light; when the 220V direct current system is tested, the change-over switch is rotated to the right, the second switch is closed, the 5 th contact and the 6 th contact are connected, and the second light-emitting diode D2 emits light.
When the device is used for testing, the insulation monitoring device can display a corresponding grounding resistance value and a grounding alarm, so that a tester can check whether the insulation detection device works normally.
To sum up, the utility model discloses following beneficial effect has:
1) the analog resistor R is arranged in the shell through the shell, so that pins of the analog resistor R are not exposed and leaked, electric shock risks and pin fracture are effectively avoided, and electric shock accidents and burning injuries are avoided;
2) the positive electrode test wire and the negative electrode test wire extend out of the shell, so that the lead does not need to be reconnected, and the lead is prevented from falling off;
3) the positive test line and the negative test line adopt standard test lines, when the test lines are not long enough, wiring does not need to be added on pins of the analog resistor R, and only a new standard type electric power test single branch line is connected on the positive test line and the negative test line in a connecting mode, so that the possibility of damaging the analog resistor R is reduced; according to the use scene, a phi 2 x 18mm needle-shaped plug, a 5mm crocodile clip, a 10mm crocodile clip, a 20mm crocodile clip and the like can be connected to the joint of the test line.
4) The test device has a conversion function, can complete tests in two DC voltage levels of 110V and 220V through the conversion switch, and can check whether the test wiring is correct or not through arranging the second light-emitting diode D2 and the second light-emitting diode D2;
5) the device is convenient to maintain, and parts can be replaced.
While the preferred embodiments of the present invention have been described, the present invention is not limited to the above embodiments, and those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and such equivalent modifications or substitutions are intended to be included within the scope of the present invention as defined by the appended claims.
Claims (9)
1. The utility model provides a DC system's insulation monitoring test device which characterized in that: the simulation test circuit comprises a simulation resistor, wherein the simulation resistor is positioned in the shell, and the simulation resistor and the negative test wire extend out of the shell.
2. The insulation monitoring test device of the direct current system according to claim 1, characterized in that: the analog testing circuit comprises a connecting module, one end of the connecting module is connected with the analog resistor, the other end of the connecting module is connected with the positive testing wire or the negative testing wire, and the connecting module comprises a change-over switch and a display module.
3. The insulation monitoring and testing apparatus of the dc system according to claim 2, wherein: the display module comprises a first light emitting diode, the change-over switch comprises a first switch, and the first switch is connected with the first light emitting diode.
4. The insulation monitoring test device of the direct current system according to claim 3, characterized in that: the display module comprises a second light emitting diode, the change-over switch comprises a second switch, the second switch is connected with the second light emitting diode, and the light emitting colors of the first light emitting diode and the second light emitting diode are different.
5. The insulation monitoring and testing apparatus of the dc system according to claim 2, wherein: the display module comprises a second light emitting diode, the change-over switch comprises a second switch, and the second switch is connected with the second light emitting diode.
6. The insulation monitoring and testing apparatus of the dc system according to claim 2, wherein: the change-over switch comprises a third switch which is a cut-off switch.
7. The insulation monitoring and testing apparatus of the dc system according to claim 2, wherein: the transfer switch is exposed from the housing.
8. The insulation monitoring test device of the direct current system according to claim 1, characterized in that: the simulation test circuit comprises a first light-emitting diode and a second light-emitting diode, and the first light-emitting diode and the second light-emitting diode are exposed out of the shell.
9. The insulation monitoring test device of the direct current system according to claim 1, characterized in that: the positive test line or the negative test line is a standard electric power test line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922369938.1U CN211786056U (en) | 2019-12-24 | 2019-12-24 | Insulation monitoring test device of direct current system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922369938.1U CN211786056U (en) | 2019-12-24 | 2019-12-24 | Insulation monitoring test device of direct current system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211786056U true CN211786056U (en) | 2020-10-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922369938.1U Active CN211786056U (en) | 2019-12-24 | 2019-12-24 | Insulation monitoring test device of direct current system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211786056U (en) |
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- 2019-12-24 CN CN201922369938.1U patent/CN211786056U/en active Active
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