CN212845848U - Alternating current insulation monitoring device - Google Patents
Alternating current insulation monitoring device Download PDFInfo
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- CN212845848U CN212845848U CN202021734289.7U CN202021734289U CN212845848U CN 212845848 U CN212845848 U CN 212845848U CN 202021734289 U CN202021734289 U CN 202021734289U CN 212845848 U CN212845848 U CN 212845848U
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- 238000009413 insulation Methods 0.000 title claims abstract description 51
- 238000012806 monitoring device Methods 0.000 title claims abstract description 33
- 238000004891 communication Methods 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 abstract description 7
- 238000001514 detection method Methods 0.000 abstract description 6
- 230000006870 function Effects 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 5
- 238000007405 data analysis Methods 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000012360 testing method Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000004364 calculation method Methods 0.000 description 2
- 238000013500 data storage Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000011897 real-time detection Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
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- 239000011521 glass Substances 0.000 description 1
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Abstract
The utility model discloses an alternating current insulation monitoring devices belongs to alternating current insulation monitoring technology field, including power, current transformer and warning circuit, the power is connected with the N line, the earth connection has been drawn forth on the N line, be provided with real-time acquisition on the earth connection alternating current's current transformer on the earth connection, the current transformer other end is connected with warning circuit. According to the characteristics of a standard power supply system of the motor train unit, the current transformer is used for collecting the current of the N line to the PE, after the current transformer is operated and processed by the insulation detector, whether the current transformer exceeds a leakage threshold value is judged, real-time monitoring on the leakage condition in the running process of the train is realized, and the insulation detection value can be checked in real time by being connected with monitoring software of an upper computer, so that the operation is more convenient. The alternating current insulation monitoring device has the functions of modifying the alarm threshold value, monitoring in real time and storing data, and can modify the alarm threshold value and perform data analysis on leakage current according to the requirements of a train.
Description
Technical Field
The utility model relates to an exchange insulation monitoring technical field, more specifically relates to an exchange insulation monitoring devices.
Background
With the development of industrial science and technology, leakage current poses a great threat to industrial production safety. In order to improve the continuity and reliability of power supply, many important production sites employ an ungrounded power supply system. The industrial insulation monitor is mainly applied to an alternating current ungrounded system in the industrial field such as mines, glass factories, electric furnaces, test equipment, metallurgical plants, chemical plants, explosion hazard places, computer centers, emergency power supplies and the like, is used for monitoring the insulation condition of the system to the ground in real time, and gives an alarm in time when the system has a ground fault to remind related personnel to troubleshoot the fault.
In addition, in the process of high-speed running of the train, an alternating current power supply line and electric equipment on the train are inevitably worn due to the special environment of the train, so that the insulating property is changed, and electric leakage is generated. When the electric leakage exceeds a certain range, the normal operation of the vehicle can be influenced, and even a fire disaster can happen. In order to ensure the continuous and reliable running of the vehicle, the vehicle needs to be frequently subjected to insulation detection, so that the insulated damaged cable or electric equipment can be timely found and maintained. At present, the existing insulation detection device does not have the functions of alarm threshold modification, real-time monitoring and data storage, and cannot modify the alarm threshold and perform data analysis on leakage current according to the requirements of a train.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art not enough, provide an exchange insulation monitoring device, simple structure, the security is high, is used for the insulating situation of real-time supervision system to ground, when ground fault appears in the system, in time reports to the police, reminds relevant personnel troubleshooting trouble, has modification alarm threshold value, real time monitoring and data storage function simultaneously to require modification alarm threshold value and carry out data analysis to the leakage current according to the train.
The purpose of the utility model is realized through the following technical scheme:
the utility model provides an exchange insulation monitoring devices, includes power, current transformer and alarm circuit, the power is connected with the N line, the earth connection has been drawn forth on the N line, be provided with real-time collection on the earth connection alternating current's current transformer on the earth connection, the current transformer other end is connected with alarm circuit.
Furthermore, the real-time clock updating circuit also comprises an RTC circuit which is used for updating the clock in real time.
Furthermore, an RS232 interface connected with an upper computer is arranged on the alternating current insulation monitoring device.
Furthermore, a communication interface is arranged on the alternating-current insulation monitoring device, and the communication interface comprises an RS485 and CAN multiplexing interface.
Further, the alarm circuit comprises a buzzer, a relay and an indicator light.
The utility model has the advantages that:
the utility model discloses a power, current transformer and warning circuit, power are connected with the N line, have drawn forth the earth connection on the N line, are provided with the current transformer who gathers alternating current on the earth connection in real time on the earth connection, and the current transformer other end is connected with warning circuit. According to the characteristics of a standard power supply system of the motor train unit, a current transformer is used for collecting the current of a zero line (N line) to PE (the N line is only grounded a little), after the operation processing of an insulating detector, whether the current exceeds a leakage threshold value is judged, the real-time detection of the leakage condition in the running process of the train is realized, and compared with the traditional design, the utility model has the advantages of convenient installation and reduced cost; the monitoring software connected with the upper computer can check the insulation detection value in real time, and is more convenient.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be 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 inventive exercise.
FIG. 1 is a block diagram of the external electrical connections of an AC insulation monitoring device;
FIG. 2 is an external electrical connection diagram of the AC insulation monitoring device;
FIG. 3 is an electrical block diagram of the MCU of the AC insulation monitoring device;
FIG. 4 is a block diagram of the internal electrical connections of the AC insulation monitoring device;
fig. 5 is a flow chart of the operation of the ac insulation monitoring device.
Detailed Description
The technical solution of the present invention is described in further detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the following description. Any feature disclosed in this specification (including any accompanying claims, abstract and drawings), may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.
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 efforts belong to the protection scope of the present invention.
Before describing the embodiments, some necessary terms need to be explained. For example:
if the terms "first," "second," etc. are used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. Thus, a "first" element discussed below could also be termed a "second" element without departing from the teachings of the present invention. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly connected" or "directly coupled" to another element, there are no intervening elements present.
The various terms appearing in this application are used for the purpose of describing particular embodiments only and are not intended as limitations on the invention, except where the context clearly dictates otherwise, the singular is intended to include the plural as well.
When the terms "comprises" and/or "comprising" are used in this specification, these terms are intended to specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence and/or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
Example 1
As shown in fig. 1 and 2, the alternating current insulation monitoring device comprises a power supply, a current transformer and an alarm circuit, wherein the power supply is connected with an N wire, a grounding wire is led out from the N wire, the grounding wire is provided with the current transformer which collects alternating current on the grounding wire in real time, and the other end of the current transformer is connected with the alarm circuit. Wherein, be provided with the RS232 interface with host computer connection on the insulating monitoring devices of interchange.
As shown in fig. 3, in a preferred embodiment, the ac insulation detection circuit further includes an RTC circuit for real-time updating of the clock. After the system is set for time, the clock can be ensured to be updated within 7 days after the system is powered off.
Example 2
The utility model provides an exchange insulation monitoring devices, includes power, current transformer and alarm circuit, the power is connected with the N line, the earth connection has been drawn forth on the N line, be provided with real-time collection on the earth connection alternating current's current transformer on the earth connection, the current transformer other end is connected with alarm circuit. Wherein, be provided with communication interface on the insulating monitoring devices of interchange, communication interface includes RS485 and the multiplexing interface of CAN.
Further, the alarm circuit comprises a buzzer, a relay and an indicator light. The device is provided with a test and reset key, and when alarming, the reset key can be pressed to reset the system. During normal operation, the test button can be pressed to test the alarm function of the device. The alternating current insulation monitoring device has the function of outputting signals by the relay, and when electric leakage alarms, the relay outputs signals to a train network. As shown in fig. 3, the measurement, storage, transmission and alarm state output of the insulation resistance are mainly completed.
The working principle is as follows: the current of the power supply zero line (N line) collected by the current transformer to the ground is calculated, and the real-time measurement of the leakage current of the alternating current circuit is realized. The insulation current value can be checked in real time by connecting an upper computer through an RS232 interface. According to the principle shown in fig. 2, an alternating current bus of a vehicle is supplied to an alternating current insulation device power supply and a test power supply through an X1 interface, after JDK is closed, an alternating current N line is communicated with a ground wire, when an alternating current line leaks electricity, the N line has leakage current, the leakage current is input through an X3 interface of an insulation monitoring device, an internal current transformer monitors the current, an alarm relay is triggered to act, and an alarm signal is output to TCMS through an X2 interface. A test button is arranged in the alternating current insulation monitoring device, and after the button is pressed down, a test loop generates current which is collected by the current transformer to trigger alarm.
As shown in fig. 4, three routes of voltage data collected by the external ADC are read through the SPI, positive line, negative line to ground voltage and insulation resistance are obtained through calculation, the obtained voltage and resistance data and a timestamp are stored in the NANDFLASH in a file form, a file system adopts the FAT32 format, whether the insulation resistance meets the set threshold requirement is judged at the same time, the buzzer and the relay are controlled to alarm, the corresponding indicator light is controlled to be turned on or off according to the actual resistance value, a client can configure relevant information through a serial port according to the actual situation, and current data information can be checked through the upper computer.
As shown in fig. 5, the STM32 is used as a main control device of the ac insulation monitoring device, and is responsible for reading serial port configuration information, real-time clock information, voltage data acquired by the external AD, and operations such as calculation and storage of insulation resistance, judgment of insulation state, output of state information and alarm information, and the like.
As shown in fig. 1 to 5, those skilled in the art can implement the present invention as an ac insulation monitoring device, taking a train as an example, collecting the current of the power zero line (N line) to the ground, and performing operation to realize real-time measurement of the leakage current of the ac line. The current of the power supply zero line (N line) collected by the current transformer to the ground is calculated, and the real-time measurement of the leakage current of the alternating current circuit is realized. The insulation current value can be checked in real time by connecting an upper computer through an RS232 interface. The vehicle alternating current bus supplies power and a test power to the alternating current insulation device through an X1 interface, after the JDK is closed, an alternating current N line is communicated with a ground wire, when an alternating current line leaks electricity, the N line has leakage current, the leakage current is input through an X3 interface of the insulation monitoring device, an internal current transformer monitors the current, an alarm relay is triggered to act, and an alarm signal is output to the TCMS through an X2 interface. A test button is arranged in the alternating-current insulation monitoring device, and after the button is pressed down, a test loop generates current which is collected by the current transformer to trigger alarm, so that the safety is improved.
The utility model provides an exchange insulation monitoring devices, including power, current transformer and warning circuit, the power is connected with the N line, has drawn forth the earth connection on the N line, is provided with the current transformer who gathers alternating current on the earth connection in real time on the earth connection, and the current transformer other end is connected with warning circuit. According to the characteristics of a standard power supply system of the motor train unit, a current transformer is used for collecting the current of a zero line (N line) to PE (the N line is only grounded a little), after the operation processing of an insulating detector, whether the current exceeds a leakage threshold value is judged, the real-time detection of the leakage condition in the running process of the train is realized, and compared with the traditional design, the utility model has the advantages of convenient installation and reduced cost; the monitoring software connected with the upper computer can check the insulation detection value in real time, and is more convenient.
In other technical features in this embodiment, those skilled in the art can flexibly select the technical features according to actual situations to meet different specific actual requirements. However, it will be apparent to one of ordinary skill in the art that: it is not necessary to employ these specific details to practice the invention. In other instances, well-known components, structures or parts are not described in detail in order to avoid obscuring the present invention, and the technical scope of the present invention is defined by the claims.
In the description of the present invention, unless otherwise expressly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are used in a generic sense as is understood by those skilled in the art. For example, the components may be fixedly connected, movably connected, integrally connected, or partially connected, mechanically connected, electrically connected, directly connected, indirectly connected through an intermediate medium, or connected inside two elements, and the like, and for those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations, that is, the expression of the language and the implementation of the actual technology can flexibly correspond, and the expression of the language (including the drawings) of the specification of the present invention does not constitute any single restrictive interpretation of the claims.
Modifications and variations may be made by those skilled in the art without departing from the spirit and scope of the invention, which should be limited only by the claims appended hereto. In the previous description, numerous specific details were set forth in order to provide a thorough understanding of the present invention. However, it will be apparent to one of ordinary skill in the art that: it is not necessary to employ these specific details to practice the invention. In other instances, well-known techniques, such as specific construction details, operating conditions, and other technical conditions, have not been described in detail in order to avoid obscuring the present invention.
Claims (5)
1. An alternating current insulation monitoring device, characterized in that: the intelligent alarm device comprises a power supply, a current transformer and an alarm circuit, wherein the power supply is connected with an N wire, a grounding wire is led out from the N wire, the grounding wire is provided with the current transformer for collecting alternating current on the grounding wire in real time, and the other end of the current transformer is connected with the alarm circuit.
2. An ac insulation monitoring device according to claim 1, wherein: the real-time clock updating circuit further comprises an RTC circuit used for updating the clock in real time.
3. An ac insulation monitoring device according to claim 1, wherein: and an RS232 interface connected with an upper computer is arranged on the alternating current insulation monitoring device.
4. An ac insulation monitoring device according to claim 1, wherein: the alternating current insulation monitoring device is provided with a communication interface, and the communication interface comprises an RS485 and CAN multiplexing interface.
5. An ac insulation monitoring device according to claim 1, wherein: the alarm circuit comprises a buzzer, a relay and an indicator light.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021734289.7U CN212845848U (en) | 2020-08-18 | 2020-08-18 | Alternating current insulation monitoring device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021734289.7U CN212845848U (en) | 2020-08-18 | 2020-08-18 | Alternating current insulation monitoring device |
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| CN212845848U true CN212845848U (en) | 2021-03-30 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118736796A (en) * | 2024-08-30 | 2024-10-01 | 浙江大学 | A method for detecting electrical fire risk |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118736796A (en) * | 2024-08-30 | 2024-10-01 | 浙江大学 | A method for detecting electrical fire risk |
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