CN203850817U - Device for achieving null line breaking alarm and protection based on three-phase four-line current monitoring - Google Patents
Device for achieving null line breaking alarm and protection based on three-phase four-line current monitoring Download PDFInfo
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- CN203850817U CN203850817U CN201420296073.5U CN201420296073U CN203850817U CN 203850817 U CN203850817 U CN 203850817U CN 201420296073 U CN201420296073 U CN 201420296073U CN 203850817 U CN203850817 U CN 203850817U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
- Y04S20/242—Home appliances
Abstract
The utility model discloses a device for achieving null line breaking alarm and protection based on three-phase four-line current monitoring. The device comprises current sensors, an A/D conversion module, a digital signal processing module, an output protection driving module and a tripping device. A total inlet line is provided with an air switch, four inlet lines of the total inlet line are respectively provided with one current sensor, the signal output ends of the current sensors are respectively connected with the input end of the A/D conversion module, the output end of the A/D conversion module is connected with the input end of the digital signal processing module, the output end of the digital signal processing module is connected with the output protection driving module which is connected with the tripping device, and the tripping device is connected with the air switch. When null line breaking faults happen to a power supply system, the digital signal processing module outputs a control signal, the output protection driving module controls the tripping device for tripping operation to perform power failure, power-failure protection is performed on the power supply system, and when a low-voltage distribution system supplies power, personal safety and safety of electric equipment are ensured.
Description
Technical field
The utility model relates to a kind of neutral line break reports to the police and the device of protecting, particularly a kind of device of realizing neutral line break warning and protection based on three-phase and four-line current monitoring.
Background technology
At present, in low-voltage-powered and illumination, mostly adopt three-phase four-wire system (A, B, C triple line and the neutral line form a practicability and effectiveness integral body) low-voltage distribution system.Under normal circumstances, due to the existence of the neutral line, each three-phase voltage can preserve the stable equilibrium each phase load is normally worked (even if certain breaks mutually).Once broken neutral line or loose contact, neutral point displacement phenomenon will occur, three-phase voltage is stable equilibrium no longer: the phase line voltage step-down that load is large, power consumption equipment cisco unity malfunction; The little phase line voltage of load uprises, and when surpassing power consumption equipment given load, causes power consumption equipment to burn, even initiation fire; In addition, during neutral line break, the voltage on zero line can be elevated to the left and right with the similar 220v of live wire moment, and voltage driven current forms loop by contact point and human body, the earth, and electric shock accidents very easily occurs.
Summary of the invention
In order to solve the problems of the technologies described above, the utility model provide a kind of cost low, can avoid due to zero line
Breaking, neutral line break is reported to the police and the device of protection in accidents caused realizing based on three-phase and four-line current monitoring.
The technical scheme that the utility model addresses the above problem is: a kind of device of realizing neutral line break warning and protection based on three-phase and four-line current monitoring, comprise current sensor, A/D modular converter, digital signal processing module, output protection driver module and release, total input-wire is provided with air switch, on four inlet wires of total input-wire, be respectively equipped with a current sensor, the signal output part of each current sensor is connected with the input of A/D modular converter respectively, the output of A/D modular converter is connected with the input of digital signal processing module, the output of digital signal processing module is connected with output protection driver module, output protection driver module is connected with release, release is connected with air switch.
Above-mentionedly based on three-phase and four-line current monitoring, realize neutral line break and report to the police and also to comprise and communicating by letter and indicating module with the device of protecting, described communication is connected with digital signal processing module with indicating module.
The beneficial effects of the utility model are: when electric power system generation neutral line break fault; be that current transformer is when neutral line current being detected and being zero; digital signal processing module was judged and is exported control signal in the very first time; output protection driver module is controlled release tripping operation power-off; electric power system is carried out to power-off protection, personal safety and power consumption equipment safety while guaranteeing low-voltage distribution system power supply, the utility model is with low cost; discriminant accuracy is high, has very important practical significance.
Accompanying drawing explanation
Fig. 1 is structured flowchart of the present utility model.
Fig. 2 is the electrical block diagram of the utility model A/D modular converter.
Fig. 3 is the electrical block diagram of the utility model digital signal processing module.
Fig. 4 is the electrical block diagram of the utility model output protection driver module.
Fig. 5 is the electrical block diagram of the utility model communication and indicating module.
Embodiment
Below in conjunction with drawings and Examples, the utility model is further described.
As shown in Figure 1, the utility model comprises 4 current sensors 1, 4 A/D modular converters, digital signal processing module, output protection driver module and release 2, total input-wire is provided with air switch, 4 current sensors 1 are contained in respectively the A of total input-wire, B, C, Real-time Collection electric current on N tetra-lines, the signal output part of each current sensor 1 is connected with the input of A/D modular converter respectively, the output of A/D modular converter is connected with the input of digital signal processing module, A/D modular converter converts analog signal to digital signal, for digital signal processing module provides parameter, the output of digital signal processing module is connected with output protection driver module, and output protection driver module is connected with release 2, and release 2 is connected with air switch.
Digital signal processing module is connected with indicating module with communication.Digital signal processing module is converted to AC value by the current value of collection, for communication and indicating module, shows, based on this module, user can simple and clearly check real-time circuit conditions.
The utility model also has following functions:
Remote monitoring function: can pass through RS485 or other communication interface, long-range running status, fault message and the monitor data of reading, can its parameter of Remote configuration with control output state, remote upgrade, is convenient to telemanagement and maintenance.
Operation principle of the present utility model is as follows: current sensor 1 Real-time Collection A, B, C, electric current on N tetra-lines, and the current signal collecting is sent into A/D modular converter, A/D modular converter is sent into digital signal processing module after converting analog signal to digital signal, digital signal processing module is realized neutral line break judgement according to the digital signal of input: if neutral line current detected, be zero, non-vanishing and the ABC three-phase current of other ABC three-phase current is kept off (imbalance), being labeled as neutral line break reports to the police, output protection driver module is controlled release 2 tripping operation power-off, thereby realize the object of neutral line break protection.
Claims (2)
1. based on three-phase and four-line current monitoring, realize the device that neutral line break is reported to the police and protected for one kind, it is characterized in that: comprise current sensor, A/D modular converter, digital signal processing module, output protection driver module and release, total input-wire is provided with air switch, on four inlet wires of total input-wire, be respectively equipped with a current sensor, the signal output part of each current sensor is connected with the input of A/D modular converter respectively, the output of A/D modular converter is connected with the input of digital signal processing module, the output of digital signal processing module is connected with output protection driver module, output protection driver module is connected with release, release is connected with air switch.
2. the device of realizing neutral line break warning and protection based on three-phase and four-line current monitoring as claimed in claim 1, is characterized in that: also comprise communication and indicating module, described communication is connected with digital signal processing module with indicating module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420296073.5U CN203850817U (en) | 2014-06-05 | 2014-06-05 | Device for achieving null line breaking alarm and protection based on three-phase four-line current monitoring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420296073.5U CN203850817U (en) | 2014-06-05 | 2014-06-05 | Device for achieving null line breaking alarm and protection based on three-phase four-line current monitoring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203850817U true CN203850817U (en) | 2014-09-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420296073.5U Active CN203850817U (en) | 2014-06-05 | 2014-06-05 | Device for achieving null line breaking alarm and protection based on three-phase four-line current monitoring |
Country Status (1)
| Country | Link |
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| CN (1) | CN203850817U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105024341A (en) * | 2015-08-17 | 2015-11-04 | 佛山电力设计院有限公司 | Circuit breaker and circuit break system having zero-line disconnection and open-phase protection function |
| CN105137207A (en) * | 2015-09-25 | 2015-12-09 | 国网山东省电力公司济南供电公司 | Three-phase power supply load unbalancing alarming device |
| CN105896462A (en) * | 2016-04-18 | 2016-08-24 | 国网山东省电力公司郓城县供电公司 | Intelligent device for achieving neutral wire breaking protection of three-phase four-wire system power supply system |
| CN106093683A (en) * | 2016-06-29 | 2016-11-09 | 河南平芝高压开关有限公司 | Heater broken wire detection system and wire break detection method |
-
2014
- 2014-06-05 CN CN201420296073.5U patent/CN203850817U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105024341A (en) * | 2015-08-17 | 2015-11-04 | 佛山电力设计院有限公司 | Circuit breaker and circuit break system having zero-line disconnection and open-phase protection function |
| CN105024341B (en) * | 2015-08-17 | 2018-08-14 | 佛山电力设计院有限公司 | With off zero and open-phase protection breaker and open-circuit system |
| CN105137207A (en) * | 2015-09-25 | 2015-12-09 | 国网山东省电力公司济南供电公司 | Three-phase power supply load unbalancing alarming device |
| CN105896462A (en) * | 2016-04-18 | 2016-08-24 | 国网山东省电力公司郓城县供电公司 | Intelligent device for achieving neutral wire breaking protection of three-phase four-wire system power supply system |
| CN106093683A (en) * | 2016-06-29 | 2016-11-09 | 河南平芝高压开关有限公司 | Heater broken wire detection system and wire break detection method |
| CN106093683B (en) * | 2016-06-29 | 2019-03-12 | 河南平芝高压开关有限公司 | Heater broken wire detection system and wire break detection method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20171109 Address after: 410000, A385 building, headquarter building, Changsha Electric Power Software Park, 39 Gaoxin Road, Changsha, Hunan Patentee after: Hunan Lin Ze Technology Development Co. Ltd. Address before: 410015 Hunan province Changsha city angtian Lake bright star city 5 building 1101 Patentee before: Peng Haoming |