CN209764972U - Low-voltage insulation monitoring system - Google Patents
Low-voltage insulation monitoring system Download PDFInfo
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- CN209764972U CN209764972U CN201920035855.6U CN201920035855U CN209764972U CN 209764972 U CN209764972 U CN 209764972U CN 201920035855 U CN201920035855 U CN 201920035855U CN 209764972 U CN209764972 U CN 209764972U
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Abstract
The utility model discloses a low-voltage insulation monitoring system, which comprises a low-voltage insulation monitoring cabinet, an upper computer and a leakage current collecting device; the low-voltage insulation monitoring cabinet comprises: the device comprises an insulation monitoring device, a fault positioning device and a controller, wherein the insulation monitoring device and the fault positioning device are respectively connected with the controller; the upper computer is connected with the controller through an Ethernet; the leakage current collecting device is arranged in a power distribution loop between the low-voltage switch cabinet and the low-voltage electric equipment and is connected with the fault positioning device through a cable. The system has simple structure, high reliability and low operation and maintenance cost.
Description
Technical Field
the utility model relates to a circuit detection technical field especially relates to a low pressure insulation monitoring system.
Background
At present, in a low-voltage distribution system, leakage detecting relays or other insulation monitoring devices are widely installed on a low-voltage switch cabinet in a scattered manner in situ, and are used for detecting whether current leaks in a low-voltage distribution loop. Although this method can detect whether there is a current leakage, there are many disadvantages. For example: insulation monitoring devices are dispersedly installed in the low-voltage switch cabinet, bring very big inconvenience for production maintenance on the one hand, cause the low-voltage switch cabinet structure numerous and diverse simultaneously, the fault point increases, reduces the reliability, increases fortune dimension cost.
SUMMERY OF THE UTILITY MODEL
The present invention aims to solve at least one of the technical problems in the related art to a certain extent.
Therefore, the utility model aims to provide an insulating monitoring system of low pressure, simple structure, the reliability is high, the fortune dimension is with low costs.
In order to achieve the purpose, the utility model provides a low-voltage insulation monitoring system, which comprises a low-voltage insulation monitoring cabinet, an upper computer and a leakage current collecting device;
The low-voltage insulation monitoring cabinet comprises: the device comprises an insulation monitoring device, a fault positioning device and a controller, wherein the insulation monitoring device and the fault positioning device are respectively connected with the controller;
The upper computer is connected with the controller through an Ethernet;
The leakage current collecting device is arranged in a power distribution loop between the low-voltage switch cabinet and the low-voltage electric equipment and is connected with the fault positioning device through a cable.
According to the utility model discloses an embodiment, the insulation monitoring device pass through the cable with the low tension switchgear with leak current collection system between the cable junction.
According to the utility model discloses an embodiment, the insulation monitoring device pass through the cable with cable junction between low tension switchgear and step-down transformer.
According to an embodiment of the present invention, the insulation monitoring devices correspond one-to-one to the step-down transformers;
The number of the power distribution loops is multiple, and each power distribution loop corresponds to one leakage current acquisition device;
The number of the fault positioning devices is at least one, and each fault positioning device corresponds to at least one electric leakage acquisition device.
According to the utility model discloses an embodiment, be provided with the status indicator lamp of distribution circuit on the fault locating device, the status indicator lamp with the distribution circuit one-to-one.
According to the utility model discloses an embodiment, the low pressure insulation monitoring still is provided with alarm device on the cupboard, alarm device with the controller is connected.
According to an embodiment of the present invention, the system further comprises: one or more of a temperature sensor, a humidity sensor and a multifunctional electric meter;
The temperature sensor, the humidity sensor and the multifunctional electric meter are all connected with the controller.
according to the utility model discloses an embodiment, the fault location module with all possess 485 communication interfaces on the insulation monitoring device, just the fault location module with insulation monitoring device all passes through 485 communication interfaces with the controller is connected.
according to the utility model discloses an embodiment, the low pressure insulation monitoring still is provided with the switch on the cupboard, the one end of switch with the controller is connected, the other end of switch with the upper computer is connected.
According to the utility model discloses an embodiment, one the low voltage insulation monitoring cabinet corresponds many low-voltage switchgear cabinets.
The embodiment of the utility model provides an in one or more technical scheme, following technological effect or advantage have at least:
1. The leakage condition of current in a low-voltage distribution loop is monitored by arranging the leakage acquisition device and the independent low-voltage insulation monitoring cabinet, and the structure of the low-voltage switch cabinet is simplified.
2. The low-voltage insulation monitoring cabinet is connected with the upper computer through the Ethernet, so that the remote monitoring of the low-voltage distribution loop is realized, and the current leakage condition of the current low-voltage distribution loop can be known without being checked by a worker on site.
3. the leakage current condition of a plurality of low-voltage switch cabinets can be detected through one low-voltage insulation monitoring cabinet and a plurality of leakage current collecting devices, the system is simple in structure, few in fault points, high in reliability and low in operation and maintenance cost.
4. the power grid data, the environmental data and the low-voltage insulation monitoring data are deeply fused, and the mutual crossing, the mutual penetration, the mutual information reference and the mutual resource sharing of all subsystems are realized.
drawings
Fig. 1 is a system architecture diagram of a low voltage insulation monitoring system according to an embodiment of the present disclosure;
Fig. 2 is a system architecture diagram of a low voltage insulation monitoring system according to another embodiment of the present disclosure.
In the figure:
1-low voltage insulation monitoring cabinet;
11-insulation monitoring means; 12-fault locating means; 13-a controller; 14-an alarm device; 15-a temperature sensor; 16-a humidity sensor; 17-a switch; 18-electric meter;
2-an upper computer;
3-a leakage current collecting device;
4-low voltage switchgear;
5-low voltage electric equipment;
6-a power distribution loop;
7-step-down transformer.
Detailed Description
reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.
the low voltage insulation monitoring system according to an embodiment of the present invention is described below with reference to the drawings.
Fig. 1 is a system architecture diagram of a low voltage insulation monitoring system according to an embodiment of the present disclosure. As shown in fig. 1, the low voltage insulation monitoring system according to the embodiment of the present invention includes a low voltage insulation monitoring cabinet 1, an upper computer 2 and a leakage current collecting device 3; include in the low pressure insulation monitoring cabinet 1: the device comprises an insulation monitoring device 11, a fault positioning device 12 and a controller 13, wherein the insulation monitoring device 11 and the fault positioning device 12 are respectively connected with the controller 13; the upper computer 2 is connected with the controller 13 through the Ethernet; the leakage current collecting device 3 is arranged in a power distribution loop 6 between the low-voltage switch cabinet 4 and the low-voltage electric equipment 5 and is connected with the fault positioning device 12 through a cable. In addition, still be provided with switch 17 on low voltage insulation monitoring cabinet 1, switch 17's one end is connected with controller 13 through ethernet, and switch 17's the other end is connected with host computer 2 through ethernet.
The insulation monitoring device 11 is used for continuously injecting alternating current low-frequency current signals into the power distribution loop 6, meanwhile, an insulation mutual inductor inside the insulation monitoring device monitors the change condition of low-frequency leakage current, and when the leakage current exceeds a system preset value, a fault indicator lamp on a panel of the insulation monitoring device 11 is turned on to remind workers of insulation faults in a low-voltage system.
Considering that the insulation monitoring device 11 may have a false alarm, in this embodiment, the leakage current collecting devices 3 corresponding to the number of the power distribution loops 6 are also provided, so as to collect the leakage current in each power distribution loop 6, and send the collected leakage current signal to the fault locating device 12; further, the fault location device 12 compares the received leakage current signal with a system preset value; if the leakage current signal exceeds the preset value of the system, the insulation fault of the power distribution circuit 6 is indicated, and at the moment, a corresponding short circuit fault indicator lamp on the panel of the fault positioning device 12 is turned on. By the double detection method, the detection accuracy is improved. It should be noted that the leakage current collecting device 3 should be disposed downstream of the insulation monitoring device 11, so that the leakage current collecting device 3 can receive the current signal injected by the insulation monitoring device 11.
There are many positions for injecting the current signal into the insulation monitoring device 11, but it is necessary to ensure that the injected signal can flow through each power distribution loop 6 to be detected; in this embodiment, the insulation monitoring device 11 needs to be disposed on the low-voltage side of the step-down transformer 7.
As a possible implementation manner, as shown in fig. 2, the insulation monitoring device 11 is connected with the cable between the low-voltage switch cabinet 4 and the leakage current collecting device 3 through a cable. That is, branch signal cables, the number of which is the same as that of the power distribution circuits 6, are branched from the main signal cable of the insulation monitoring device 11, and each branch signal cable corresponds to one power distribution circuit 6.
As another possible implementation, as shown in fig. 1, the insulation monitoring device 11 is connected to the cable between the low-voltage switchgear 4 and the step-down transformer 7 by a cable.
Further, with continued reference to fig. 1, the insulation monitoring devices 11 correspond one-to-one to the step-down transformers 7; one or more power distribution loops 6 are provided, and each power distribution loop 6 corresponds to one leakage current acquisition device 3; there is at least one fault locating device 12, and each fault locating device 12 corresponds to at least one leakage current collecting device. For example, there are currently ten power distribution loops 6, and at this time, each power distribution loop 6 is provided with one leakage current collecting device 3; the number of the fault locating devices 12 can be one, two or the like; when the number of the fault locating devices 12 is one, the fault locating devices themselves correspond to ten leakage current collecting devices 3, and when the number of the fault locating devices 12 is two, each fault locating device 12 may correspond to five leakage current collecting devices 3, which may be determined according to actual conditions. In fig. 1 and 2, there are four power distribution circuits 6, four leakage current collecting devices 3, and one fault locating device 12, that is, one fault locating device corresponds to four leakage current collecting devices.
In order to accurately know the power distribution circuits 6 with insulation faults, the fault positioning device 12 is provided with status indicator lamps of the power distribution circuits 6, the status indicator lamps correspond to the power distribution circuits 6 one by one, and when one of the power distribution circuits 6 has an insulation fault, the corresponding status indicator lamp is turned on. Therefore, the working personnel can quickly know the power distribution circuit 6 with the insulation fault and respond, the working efficiency is improved, and the operation and maintenance cost is reduced.
In this embodiment, the insulation monitoring device 11 and the fault locating device 12 both send the signal detected by themselves to the controller 13, and send the signal to the upper computer 2 through the controller 13, thereby realizing the remote monitoring of the low-voltage distribution loop 6, so that the current leakage condition of the low-voltage distribution loop 6 can be known without the need of checking the current on site by a worker. In addition, all possess 485 communication interfaces on insulating monitoring devices 11 and the fault location module, and insulating monitoring devices 11 and fault location module all are connected with controller 13 through 485 communication interfaces.
The low-voltage insulation monitoring cabinet 1 is also provided with an alarm device 14, and the alarm device 14 is connected with the controller 13. The alarm device 14 may be, but is not limited to, a buzzer, an audible and visual alarm, etc.
In order to acquire the temperature/humidity in the environment, the low-voltage insulation monitoring system further comprises: the temperature sensor 15 and/or the humidity sensor 16, and the temperature sensor 15 and the humidity sensor 16 are connected with the controller 13. The temperature sensor 15 and/or the humidity sensor 16 may be disposed at any position according to actual conditions, for example, the temperature sensor and/or the humidity sensor may be disposed in the same room as the low-voltage insulation monitoring cabinet 1, or may be disposed outdoors, etc.
It should be understood that, in the present embodiment, one low-voltage insulation monitoring cabinet 1 may correspond to one low-voltage switch cabinet 4, and may also correspond to a plurality of low-voltage switch cabinets 4, which may be determined according to actual situations. And a power supply is also arranged in the low-voltage insulation monitoring cabinet 1 and used for providing power supply for each device in the low-voltage insulation monitoring cabinet 1.
Further, the controller 13 may also communicate with the multifunctional electric meter 18 connected to the low-voltage switch cabinet 4 by using a serial communication protocol (for example, MODBUS or PROFIBUS) according to a user demand, and when the multifunctional electric meter 18 collects the energy consumption data of the low-voltage switch cabinet 4, the state of the power distribution switch in the low-voltage switch cabinet 4 may be collected by the multifunctional electric meter 18, and the power distribution switch may be remotely controlled.
it should be understood that, in this embodiment, each device may be connected through a signal line/cable, which may be selected according to actual situations, and is not limited herein. Further, the controller may be, but is not limited to, a programmable logic controller.
To sum up, the embodiment of the utility model provides an in the low pressure insulation monitoring system who provides has following technological effect or advantage at least:
1. The leakage condition of current in a low-voltage distribution loop is monitored by arranging the leakage acquisition device and the independent low-voltage insulation monitoring cabinet, and the structure of the low-voltage switch cabinet is simplified.
2. The low-voltage insulation monitoring cabinet is connected with the upper computer through the Ethernet, so that the remote monitoring of the low-voltage distribution loop is realized, and the current leakage condition of the current low-voltage distribution loop can be known without being checked by a worker on site.
3. the leakage current condition of a plurality of low-voltage switch cabinets can be detected through one low-voltage insulation monitoring cabinet and a plurality of leakage current collecting devices, the system is simple in structure, few in fault points, high in reliability and low in operation and maintenance cost.
4. The power grid data, the environmental data and the low-voltage insulation monitoring data are deeply fused, and the mutual crossing, the mutual penetration, the mutual information reference and the mutual resource sharing of all subsystems are realized.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
in the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.
Claims (10)
1. a low-voltage insulation monitoring system is characterized by comprising a low-voltage insulation monitoring cabinet, an upper computer and a leakage current collecting device;
The low-voltage insulation monitoring cabinet comprises: the device comprises an insulation monitoring device, a fault positioning device and a controller, wherein the insulation monitoring device and the fault positioning device are respectively connected with the controller;
The upper computer is connected with the controller through an Ethernet;
The leakage current collecting device is arranged in a power distribution loop between the low-voltage switch cabinet and the low-voltage electric equipment and is connected with the fault positioning device through a cable.
2. The low voltage insulation monitoring system according to claim 1, wherein the insulation monitoring device is connected to the cable between the low voltage switchgear and the leakage current collecting device by a cable.
3. The low voltage insulation monitoring system according to claim 1, wherein said insulation monitoring device is connected to a cable between said low voltage switchgear and a step-down transformer by a cable.
4. The low voltage insulation monitoring system according to claim 3, wherein said insulation monitoring devices are in one-to-one correspondence with said step-down transformers;
the number of the power distribution loops is multiple, and each power distribution loop corresponds to one leakage current acquisition device;
the number of the fault positioning devices is at least one, and each fault positioning device corresponds to at least one electric leakage acquisition device.
5. the low voltage insulation monitoring system according to claim 4, wherein the fault locating device is provided with status indicator lights of the power distribution circuit, and the status indicator lights correspond to the power distribution circuit in a one-to-one manner.
6. The low-voltage insulation monitoring system according to claim 5, wherein an alarm device is further arranged on the low-voltage insulation monitoring cabinet, and the alarm device is connected with the controller.
7. The low voltage insulation monitoring system according to claim 1, characterized in that said system further comprises: one or more of a temperature sensor, a humidity sensor and a multifunctional electric meter;
Wherein, temperature sensor, humidity transducer with the multifunctional electric meter all with the controller is connected.
8. The system according to any of claims 1-7, wherein 485 communication interfaces are provided on the fault locating device and the insulation monitoring device, and the fault locating device and the insulation monitoring device are connected to the controller through the 485 communication interfaces.
9. the low-voltage insulation monitoring system according to claim 8, wherein a switch is further arranged on the low-voltage insulation monitoring cabinet, one end of the switch is connected with the controller, and the other end of the switch is connected with the upper computer.
10. The low-voltage insulation monitoring system according to claim 9, wherein one low-voltage insulation monitoring cabinet corresponds to a plurality of low-voltage switch cabinets.
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| CN201920035855.6U CN209764972U (en) | 2019-01-08 | 2019-01-08 | Low-voltage insulation monitoring system |
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| CN201920035855.6U CN209764972U (en) | 2019-01-08 | 2019-01-08 | Low-voltage insulation monitoring system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109655704A (en) * | 2019-01-08 | 2019-04-19 | 中国恩菲工程技术有限公司 | Low-voltage insulation monitors system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109655704A (en) * | 2019-01-08 | 2019-04-19 | 中国恩菲工程技术有限公司 | Low-voltage insulation monitors system |
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