CN202916376U - Low voltage safety warning device capable of performing single-phase grounding alarm - Google Patents

Low voltage safety warning device capable of performing single-phase grounding alarm Download PDF

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Publication number
CN202916376U
CN202916376U CN 201220594203 CN201220594203U CN202916376U CN 202916376 U CN202916376 U CN 202916376U CN 201220594203 CN201220594203 CN 201220594203 CN 201220594203 U CN201220594203 U CN 201220594203U CN 202916376 U CN202916376 U CN 202916376U
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CN
China
Prior art keywords
voltage
low
chip microcomputer
phase
electric shock
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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.)
Expired - Fee Related
Application number
CN 201220594203
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Chinese (zh)
Inventor
杜涛涛
张向阳
周帅
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XIN'AN COUNTY ELECTRIC POWER CO Ltd
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XIN'AN COUNTY ELECTRIC POWER CO Ltd
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Priority to CN 201220594203 priority Critical patent/CN202916376U/en
Application granted granted Critical
Publication of CN202916376U publication Critical patent/CN202916376U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model belongs to the anti-electric shock protection technology in a low voltage distribution system and provides a low voltage safety warning device capable of performing single-phase grounding alarm. The low voltage safety warning device comprises a grounding detection circuit (13), a relay (12) and an electronic alarm (14); the grounding detection circuit (13) is respectively in connection with a one-chip microcomputer (1) and an anti-electric shock voltage reduction module (11); the relay (12) is located between the anti-electric shock voltage reduction module (11) and the one-chip microcomputer (1); on one hand the grounding detection circuit (13) is in connection with the one-chip microcomputer (1) through low voltage three-phase alternating current (2), and on the other hand the grounding detection circuit (13) closes the relay (12) through the anti-electric shock voltage reduction module (11) and is then in connection with the one-chip microcomputer (1). The low voltage safety warning device realizes single-phase grounding fault alarm function and effectively avoids false alarm.

Description

Can carry out the low-voltage safety alarming device that single-phase earthing is reported to the police
Technical field
The utility model belongs to electrocution-proof protection technology in the low-voltage distribution system, relates in particular to a kind of low-voltage safety alarming device that single-phase earthing is reported to the police that carries out.
Background technology
In the low-voltage distribution system; the installing aftercurrent action protecting equipment is to prevent one of the effective measures that cause shock hazard of directly or indirectly getting an electric shock, and also is effectively to control the common technology means that electric on fire, electrical equipment damage accident that electric wiring or electrical equipment bring out because of earth fault and accident of human electric shock occur.
Yet aftercurrent action protecting equipment of the prior art can't detect and in time notify the low-voltage distribution system maintainer when single-phase earthing appears in low-voltage distribution system.
The utility model content
For solving the problems of the technologies described above, the purpose of this utility model is to provide a kind of low-voltage safety alarming device that single-phase earthing is reported to the police that carries out.
The utility model adopts following technical scheme for finishing above-mentioned purpose:
A kind of low-voltage safety alarming device that carries out one-phase ground protection, described low-voltage safety alarming device includes single-chip microcomputer, wireless network communication module and protection against electric shock voltage reduction module; Described low-voltage safety alarming device also includes grounded inspection circuit, relay and electronic alarm; The grounded inspection circuit that whether occurs singlephase earth fault for detection of the low-voltage three-phase AC electricity links to each other with single-chip microcomputer, protection against electric shock voltage reduction module respectively; Described protection against electric shock voltage reduction module links to each other with single-chip microcomputer by the low-voltage three-phase AC electricity on the one hand; Described protection against electric shock voltage reduction module links to each other with single-chip microcomputer by relay the aspect in addition; Send the relay of singlephase earth fault warning message between protection against electric shock voltage reduction module and single-chip microcomputer in order to drive described electronic alarm when the closure; The grounded inspection circuit that whether occurs singlephase earth fault for detection of the low-voltage three-phase AC electricity links to each other with single-chip microcomputer by the low-voltage three-phase AC electricity on the one hand; Described grounded inspection circuit links to each other with single-chip microcomputer after making relay closes by the protection against electric shock voltage reduction module on the other hand.
Link to each other with single-chip microcomputer in order to the wireless network communication module that sends singlephase earth fault warning short message to user mobile phone.
Corresponding described low-voltage three-phase AC electricity is provided with to detect the zero cross detection circuit whether the low-voltage three-phase AC electricity produces zero-sequence current, and described zero cross detection circuit links to each other with single-chip microcomputer by photoelectrical coupler.
Described electronic alarm is hummer.
In a kind of intelligent low-pressure security early warning protector that carries out the low-voltage safety alarming device that single-phase earthing reports to the police that the utility model proposes, when grounded inspection circuit detects singlephase earth fault, produce the pressure drop closing relay by the protection against electric shock voltage reduction module; Relay closes drives electronic alarm and sends the singlephase earth fault warning message, and produce an electric signal and be sent to single-chip microcomputer, when single-chip microcomputer receives this electric signal, the control wireless network communication module sends singlephase earth fault warning short message to user mobile phone, thereby realized the function that singlephase earth fault is reported to the police, simultaneously, adopt zero cross detection circuit whether to produce zero-sequence current for detection of the low-voltage three-phase AC electricity, if produce then send it to single-chip microcomputer, because the leak current fault such as single-phase earthing or electric shock fault all can cause the low-voltage three-phase AC electricity to produce zero-sequence current, therefore, single-chip microcomputer comprehensively judges whether to control wireless network communication module to user mobile phone transmission singlephase earth fault warning short message according to zero-sequence current and electric signal, can further be confirmed whether to occur singlephase earth fault, thereby effectively prevent false alarm.
Description of drawings
Fig. 1 is circuit block diagram of the present utility model.
Among the figure: 1, single-chip microcomputer, 2, low-voltage three-phase AC electricity, 3, transformer, 4, rectifier bridge, 5, Voltage stabilizing module, 6, user mobile phone, 7, wireless network communication module, 8, rechargeable battery, 9, zero cross detection circuit, 10, photoelectrical coupler, 11, protection against electric shock voltage reduction module, 12, relay, 13, grounded inspection circuit, 14, electronic alarm.
Embodiment
Be illustrated of the present utility model below in conjunction with the drawings and specific embodiments:
As shown in Figure 1, a kind of low-voltage safety alarming device that carries out one-phase ground protection, described low-voltage safety alarming device include single-chip microcomputer 1, wireless network communication module and 7 protection against electric shock voltage reduction modules 11; Described low-voltage safety alarming device also includes grounded inspection circuit 13, relay 12 and electronic alarm 14; The grounded inspection circuit 13 that whether occurs singlephase earth fault for detection of the low-voltage three-phase AC electricity links to each other with single-chip microcomputer 1, protection against electric shock voltage reduction module 11 respectively; Described protection against electric shock voltage reduction module 11 links to each other with single-chip microcomputer 1 by low-voltage three-phase AC electricity 2 on the one hand; Described protection against electric shock voltage reduction module 11 links to each other with single-chip microcomputer 1 by relay 12 on the other hand; Send the relay 12 of singlephase earth fault warning message between protection against electric shock voltage reduction module 11 and single-chip microcomputer 1 in order to drive described electronic alarm 14 when the closure; The grounded inspection circuit 13 that whether occurs singlephase earth fault for detection of low-voltage three-phase AC electricity 2 links to each other with single-chip microcomputer 1 by low-voltage three-phase AC electricity 2 on the one hand; Described grounded inspection circuit 13 links to each other with single-chip microcomputer 1 after making relay 12 closures by protection against electric shock voltage reduction module 11 on the other hand.
Link to each other with single-chip microcomputer 1 in order to the wireless network communication module 7 that sends singlephase earth fault warning short message to user mobile phone 6.
Corresponding described low-voltage three-phase AC electricity 2 is provided with to detect the zero cross detection circuit 9 whether the low-voltage three-phase AC electricity produces zero-sequence current, and described zero cross detection circuit 9 links to each other with single-chip microcomputer 1 by photoelectrical coupler 10.
Described electronic alarm 14 is hummer.
When the utility model used, whether grounded inspection circuit 13 singlephase earth fault occurred for detection of low-voltage three-phase AC electricity 2, when detecting singlephase earth fault, produced pressure drop closing relay 12 by protection against electric shock voltage reduction module 11; Relay 12 is used for driving hummer and sends the singlephase earth fault warning message when closure, and produces an electric signal and be sent to single-chip microcomputer 1; When single-chip microcomputer 1 receives this electric signal, control wireless network communication module 7 sends singlephase earth fault warning short message to user mobile phone 6, thereby so that the intelligent low-pressure shock preventing protector of electric of the present embodiment except having original antitheft and electroshock-proof function, has also had the function that singlephase earth fault is reported to the police; Whether zero cross detection circuit 9 then produces zero-sequence current for detection of low-voltage three-phase AC electricity 2, if produce then send it to single-chip microcomputer 1, because the leak current fault such as single-phase earthing or electric shock fault all can cause the low-voltage three-phase AC electricity to produce zero-sequence current, therefore, single-chip microcomputer comprehensively judges whether to control wireless network communication module 7 to user mobile phone 6 transmission singlephase earth fault warning short messages according to zero-sequence current and electric signal, can further be confirmed whether to occur singlephase earth fault, thereby effectively prevent false alarm.
Above embodiment is described preferred implementation of the present utility model; be not that scope of the present utility model is limited; under the prerequisite that does not break away from the utility model design spirit; various distortion and improvement that the common engineering technical personnel in this area make the technical solution of the utility model all should fall in the protection domain of the present utility model.

Claims (4)

1. low-voltage safety alarming device that can carry out one-phase ground protection, described low-voltage safety alarming device includes single-chip microcomputer (1), wireless network communication module (7) and protection against electric shock voltage reduction module (11); It is characterized in that: described low-voltage safety alarming device also includes grounded inspection circuit (13), relay (12) and electronic alarm (14); The grounded inspection circuit (13) that whether occurs singlephase earth fault for detection of the low-voltage three-phase AC electricity links to each other with single-chip microcomputer (1), protection against electric shock voltage reduction module (11) respectively; Described protection against electric shock voltage reduction module (11) links to each other with single-chip microcomputer (1) by low-voltage three-phase AC electricity (2) on the one hand; Described protection against electric shock voltage reduction module (11) links to each other with single-chip microcomputer (1) by relay (12) on the other hand; Be positioned between protection against electric shock voltage reduction module (11) and the single-chip microcomputer (1) in order to drive the relay (12) that described electronic alarm (14) sends the singlephase earth fault warning message when the closure; The grounded inspection circuit (13) that whether occurs singlephase earth fault for detection of low-voltage three-phase AC electricity (2) links to each other with single-chip microcomputer (1) by low-voltage three-phase AC electricity (2) on the one hand; Described grounded inspection circuit (13) links to each other with single-chip microcomputer (1) after making relay (12) closed by protection against electric shock voltage reduction module (11) on the other hand.
2. the low-voltage safety alarming device that carries out one-phase ground protection according to claim 1 is characterized in that: link to each other with single-chip microcomputer (1) in order to the wireless network communication module (7) that sends singlephase earth fault warning short message to user mobile phone (6).
3. the low-voltage safety alarming device that carries out one-phase ground protection according to claim 1; it is characterized in that: corresponding described low-voltage three-phase AC electricity (2) is provided with to detect the zero cross detection circuit (9) whether the low-voltage three-phase AC electricity produces zero-sequence current, and described zero cross detection circuit (9) links to each other with single-chip microcomputer (1) by photoelectrical coupler (10).
4. the low-voltage safety alarming device that carries out one-phase ground protection according to claim 1, it is characterized in that: described electronic alarm (14) is hummer.
CN 201220594203 2012-11-13 2012-11-13 Low voltage safety warning device capable of performing single-phase grounding alarm Expired - Fee Related CN202916376U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201220594203 CN202916376U (en) 2012-11-13 2012-11-13 Low voltage safety warning device capable of performing single-phase grounding alarm

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201220594203 CN202916376U (en) 2012-11-13 2012-11-13 Low voltage safety warning device capable of performing single-phase grounding alarm

Publications (1)

Publication Number Publication Date
CN202916376U true CN202916376U (en) 2013-05-01

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CN 201220594203 Expired - Fee Related CN202916376U (en) 2012-11-13 2012-11-13 Low voltage safety warning device capable of performing single-phase grounding alarm

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104155561A (en) * 2014-08-06 2014-11-19 江苏永钢集团有限公司 Alarming protection device for three-phase power supply in case of one-phase line grounding

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104155561A (en) * 2014-08-06 2014-11-19 江苏永钢集团有限公司 Alarming protection device for three-phase power supply in case of one-phase line grounding

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GR01 Patent grant
C17 Cessation of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20130501

Termination date: 20131113