CN219436646U - Low-voltage line protector - Google Patents
Low-voltage line protector Download PDFInfo
- Publication number
- CN219436646U CN219436646U CN202223546047.7U CN202223546047U CN219436646U CN 219436646 U CN219436646 U CN 219436646U CN 202223546047 U CN202223546047 U CN 202223546047U CN 219436646 U CN219436646 U CN 219436646U
- Authority
- CN
- China
- Prior art keywords
- module
- analog
- acquisition module
- transformer
- current transformer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model discloses a low-voltage line protector, which comprises a host module, a switching value acquisition module, an electric signal acquisition module, a driving module, a communication module, a display module and a key module, wherein the switching value acquisition module, the electric signal acquisition module, the driving module, the communication module, the display module and the key module are connected with the host module; the electric signal acquisition module comprises a voltage transformer, a current transformer, a zero sequence current transformer, a current transducer, an analog multi-way switch, an amplifier for instruments and an analog-to-digital converter; the voltage transformer, the current transformer and the zero sequence current transformer are respectively connected with the current transducer, the analog multi-way switch, the amplifier for the instrument and the analog-to-digital converter are sequentially connected, and the analog-to-digital converter is connected with the host module. The utility model collects and processes the field signal in real time, can send out tripping signal when the low-voltage power supply system has faults such as short circuit, overcurrent, electric leakage, undervoltage and the like, controls the feed switch to move and trip, and has the advantages of high precision, strong real-time performance, high reliability and the like.
Description
Technical Field
The utility model belongs to the field of low-voltage line protection, and particularly relates to a low-voltage line protector.
Background
The low-voltage power supply system must be provided with a low-voltage feed switch protection device, and the low-voltage feed switch protection device can rapidly trip under the control of a related protector after faults such as short circuit, overload, electric leakage, undervoltage and the like occur, so that the performance of the feed switch protection device is related to the safety and reliability of the power supply system; on the other hand, with the development of computer technology and network technology, the feed switch protection device is also developed towards the direction of intelligence and informatization, so that the research of the protector with high performance, high reliability and high intelligence is of great significance.
In view of this, the present patent is filed.
Disclosure of Invention
The utility model aims to provide a low-voltage line protector, which integrates relay protection, comprehensive measurement and control and real-time communication into a whole.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a low-voltage line protector comprises a host module, a switching value acquisition module, an electric signal acquisition module, a driving module, a communication module, a display module and a key module, wherein the switching value acquisition module, the electric signal acquisition module, the driving module, the communication module, the display module and the key module are connected with the host module;
the electric signal acquisition module comprises a voltage transformer for acquiring three-phase alternating-current voltage signals, a current transformer for acquiring alternating-current electric signals, a zero-sequence current transformer for acquiring zero-sequence current signals, a current transducer, an analog multi-way switch, an amplifier for instruments and an analog-to-digital converter; the voltage transformer, the current transformer and the zero sequence current transformer are respectively connected with the current transducer, the analog multi-way switch, the amplifier for the instrument and the analog-to-digital converter are sequentially connected, and the analog-to-digital converter is connected with the host module.
Further, the switching value acquisition module is realized by adopting an optical coupler isolator.
Further, the driving module is realized by a relay.
Further, the communication module is realized by adopting an RS485 module.
Further, the host module is also connected with an alarm device.
The utility model collects and processes the field signal in real time, can send out tripping signal when the low-voltage power supply system has faults such as short circuit, overcurrent, electric leakage, undervoltage and the like, controls the feed switch to move and trip, and has the advantages of high precision, strong real-time performance, high reliability and the like.
Drawings
Fig. 1 is a schematic structural view of the present utility model.
Detailed Description
As shown in fig. 1, the low-voltage line protector provided in this embodiment includes a host module, a switching value acquisition module, an electrical signal acquisition module, a driving module, a communication module, a display module and a key module, where the host module adopts a main control module formed by STM32 series singlechips, and the STM32 series singlechips are integrated with devices on the same chip, such as operation, control, data storage-memory, program storage, input/output devices and an interrupt system, so as to meet the requirements of the embodiment in this market for the low-voltage line protector.
The switching value acquisition module is used for detecting switching value information of the field device, such as a field switching-off or switching-on state, a fan electric lock state and the like, and is realized through the optical coupling isolator, and is connected with the host module to send the state switching value information of the field device to the host module, so that a reference basis is provided for the host module to control the field device.
The electric information acquisition module is used for acquiring three-phase alternating voltage signals, three-phase alternating current signals and zero sequence current signals; the system comprises a voltage transformer for collecting three-phase alternating voltage signals, a current transformer for alternating current signals and a zero sequence current transformer for collecting zero sequence current signals, wherein the voltage transformer and the current transformer output current signals which are 0-1A, the current signals are transmitted to a host module after passing through a current transducer, an analog multi-way switch, an amplifier for instruments and an analog-to-digital converter, the host module judges the current state according to the collected signals, for example, when the current is greater than 8 times of rated current, the fault is judged to be a short circuit, a tripping instruction is immediately sent, and the tripping of the short circuit is completed within 200 ms; when the current is greater than 1.2 times of rated current, the fault is judged to be overcurrent, and the operation is performed according to an inverse time limit principle.
The driving module is used for driving the field device to change the running state of the field device, and can be realized by adopting a relay and the like, such as (switching on/off) control and the like.
The communication module is used for being connected with an upper computer to realize data transmission and storage, and is connected with an RS485 module to realize data uploading through an RS485 serial port.
The display module is used for displaying fault information, including fault types, line names and the like, and the embodiment adopts the liquid crystal display to display the fault information, and the liquid crystal display is connected with the host module through the serial port module. The key module is used for controlling the operation of displaying contents, such as page turning up and down, and the like, and can also be used for realizing the display and operation functions by adopting the touch display component.
The host module can also be connected with an alarm device, and when abnormality occurs, workers are reminded in an alarm mode.
The embodiment integrates relay protection, comprehensive measurement and control and real-time communication into a whole. The protector collects and processes field signals in real time, has the characteristics of perfect protection function, various anti-interference designs and the like, and has the advantages of high precision, strong instantaneity, high reliability and the like through experimental data and real-time operation results.
The foregoing is merely a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any modification and substitution based on the technical scheme and the inventive concept provided by the present utility model should be covered in the scope of the present utility model.
Claims (5)
1. A low voltage line protector, characterized by: the device comprises a host module, a switching value acquisition module, an electric signal acquisition module, a driving module, a communication module, a display module and a key module, wherein the switching value acquisition module, the electric signal acquisition module, the driving module, the communication module, the display module and the key module are connected with the host module;
the electric signal acquisition module comprises a voltage transformer for acquiring three-phase alternating-current voltage signals, a current transformer for acquiring alternating-current electric signals, a zero-sequence current transformer for acquiring zero-sequence current signals, a current transducer, an analog multi-way switch, an amplifier for instruments and an analog-to-digital converter; the voltage transformer, the current transformer and the zero sequence current transformer are respectively connected with the current transducer, the analog multi-way switch, the amplifier for the instrument and the analog-to-digital converter are sequentially connected, and the analog-to-digital converter is connected with the host module.
2. A low voltage line protector according to claim 1, characterized in that: the switching value acquisition module is realized by adopting an optical coupling isolator.
3. A low voltage line protector according to claim 1, characterized in that: the driving module is realized by a relay.
4. A low voltage line protector according to claim 1, characterized in that: the communication module is realized by adopting an RS485 module.
5. A low voltage line protector according to claim 1, characterized in that: the host module is also connected with an alarm device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223546047.7U CN219436646U (en) | 2022-12-29 | 2022-12-29 | Low-voltage line protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223546047.7U CN219436646U (en) | 2022-12-29 | 2022-12-29 | Low-voltage line protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219436646U true CN219436646U (en) | 2023-07-28 |
Family
ID=87346790
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223546047.7U Active CN219436646U (en) | 2022-12-29 | 2022-12-29 | Low-voltage line protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219436646U (en) |
-
2022
- 2022-12-29 CN CN202223546047.7U patent/CN219436646U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104600662A (en) | Automatic phase-correction protector of three-phase four-line power source | |
| CN115167556A (en) | Microcomputer integrated system for cooling control of oil immersed transformer and working method thereof | |
| CN207853440U (en) | A kind of intelligent universal circuit breaker | |
| CN219436646U (en) | Low-voltage line protector | |
| CN107834707B (en) | IEC 61850-based low-voltage intelligent power distribution system | |
| CN202102988U (en) | Intelligent miniature circuit breaker with bus system | |
| CN200950530Y (en) | Switch multifunctional intelligent comprehensive protector | |
| CN201616665U (en) | Relay protection device of microcomputer | |
| CN202103400U (en) | Electronic release for intelligent MCCB | |
| CN113777984A (en) | Direct-current high-voltage multi-path solid-state power controller | |
| CN2667768Y (en) | Intelligent motor controller | |
| CN208299429U (en) | Comprehensive protector | |
| CN201946945U (en) | Liquid crystal display intelligent control system | |
| CN2852481Y (en) | Microcomputer low-tension motor protection device | |
| CN204424870U (en) | A kind of three-phase four-wire power entangles phase protection device automatically | |
| CN214280448U (en) | Intelligent low-voltage power distribution cabinet | |
| CN205356128U (en) | Car earth -leakage protector digital analog conversion circuit based on single chip microcomputer control | |
| CN204858539U (en) | High pressure computer line protection device | |
| CN216774381U (en) | Intelligent power distribution unit | |
| CN201528179U (en) | Intelligent protection device for acquiring power supply by current transformer | |
| CN210640687U (en) | Line protection device for electric power system | |
| CN219875532U (en) | Redundant structure of chemical production frequency converter | |
| CN213402568U (en) | Novel intelligent low-voltage circuit breaker | |
| CN211183531U (en) | Quick current conversion device controller system | |
| CN218513397U (en) | High-speed transmission intelligent circuit breaker |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |