CN202488093U - Electric leakage discriminating protection device for detecting ground wire leakage current - Google Patents
Electric leakage discriminating protection device for detecting ground wire leakage current Download PDFInfo
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- CN202488093U CN202488093U CN2011205611183U CN201120561118U CN202488093U CN 202488093 U CN202488093 U CN 202488093U CN 2011205611183 U CN2011205611183 U CN 2011205611183U CN 201120561118 U CN201120561118 U CN 201120561118U CN 202488093 U CN202488093 U CN 202488093U
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Abstract
The present utility model discloses an electric leakage discriminating protection device for detecting ground wire leakage current. The device comprises a power supply circuit, an electric shock and leakage detection circuit, a signal processing circuit, an intelligent discriminating circuit, an electric shock execution circuit and a blackout execution circuit which are connected with a bus grounding monitoring device, the electrical shock and leakage detection circuit comprises a zero sequence mutual inductor arranged on a power supply loop ground wire which is used for sampling and detecting the ground wire of the power supply loop. In the electrical shock and leakage detection circuit, through adopting the zero sequence mutual inductor arranged on the power supply loop ground wire, electrical leakage and shock signals are collected. Compared with the common detection circuit, the method is only used for detecting the electrical leakage and shock signals of the ground wire, the detection effect is the same, the volume of the zero sequence mutual inductor can be effectively reduced, production costs are saved, the zero sequence mutual inductor can be arranged inside the protection device, and installing is more convenient.
Description
Technical field
The utility model relate to a kind ofly touch, earth leakage protective device, particularly a kind of the touching of low voltage electric network, earth leakage protective device of being used for.
Background technology
Touch, electric leakage protection technology is along with the development of automation and electrical technology grows up.Through touch, the automatic detection of leak current fault, with detected fault-signal processing and amplifying, go to make protection electrical equipment to trip rapidly, thereby realize touching, earth leakage protective purpose.From the earth leakage protective application development course of China, touch, electric leakage protection technology mainly contains two major types, i.e. voltage action type and electric current action type, each type has segmentation again, and product form is various, and the protection application also has nothing in common with each other.Open circuit protection, relay protection, insulating monitoring warning etc. are arranged.Be widely used in that system always protects, along separate routes protection, terminal protection and single device protection etc.
The electric current action type is to utilize the zero sequence current mutual inductor of reliable and sensitive to detect directly that current supply circuit touches, leakage current, after electronic circuit is handled, comes the technology type of control circuit break-make through executive circuit.Since it have detect sensitive, be swift in response, pattern is various, possess indirect contact protection and direct advantages such as contact protection function simultaneously, in electric power system, be used widely.Based on this principle, through constantly exploring, studying, the current mode that multiple pattern occurred is touched, earth leakage protective device in recent years.Mainly contain several so big type: l, electric current direct action type.Its basic principle be directly will detectedly touch, electric leakage signal arrangement amplification, driving switch equipment break-make, its advantage is to be quick on the draw, and is reliable to personal safety protection.Its shortcoming is that misoperation is frequent along with the influence of the aging and weather environment of line facility.Record shows according to statistics, only less than 30% performance factor, have in addition cause can not normal power supply, the user often gives it up.2, AC and DC pulse ejector half, its advantage have been to distinguish the fault current that touches, leaks electricity of normal leakage electric current and burst, have reduced the frequency of misoperation accordingly.Its shortcoming is, when shunt switching or main equipment started, the normal impulse current that often produces caused malfunction to avoid easily, is applicable to not too that therefore circuit always protects.3, phase demodulation action type and current separation action type.Its principle be emphatically from touch, the character judgement of electric leakage signal, utilize means such as phase bit comparison, wave mode discriminating, separation, differentiate more accurately touch, electric leakage signal.Its advantage is that the proper rate is than higher.Its shortcoming is that because circuit ruuning situation varies mode of touching, leaking electricity and signal reflection also often respectively have variation, thereby cause the erroneous judgement to signal easily; Make the protector tripping; And line link is more, and is with high costs, can large tracts of land not promote, use always.
Employing is also arranged at present through being arranged on residual current transformer on the current supply circuit touched, leaks information to the summation of the three-phase 1 of main circuit power supply collection; But detect because of carrying out three-phase 1 to power supply circuits; Residual current transformer need be arranged on the trunk circuit; Not only volume is big, and needs external placement, and very inconvenience is installed.
The utility model content
For addressing the above problem; The purpose of the utility model is to provide a kind of low voltage electric network that is used for; Can differentiate electric shock signal and implement protection and frequently do not have a power failure, effectively alleviate contradiction between Electrical Safety and the power supply reliability, reduce overall volume, practice thrift cost novelly touch, earth leakage protective device.
The utility model solves the technical scheme that its problem adopted:
Protective device is differentiated in a kind of electric leakage that detects the earth connection leakage current; Comprise and be used to each parts the power circuit of power supply is provided, be used for detecting touching electric-leakage detection circuit, being used for from the signal processing circuit that electric leakage signal is handled of touching of touching electric-leakage detection circuit of sampling touching electric leakage signal; The output of signal processing circuit is connected to and is used to differentiate the intelligent distinguishing circuit that touches electric leakage signal; Said intelligent distinguishing circuit links to each other with the outage executive circuit that is used to carry out the outage operation response with the electric shock executive circuit that is used to carry out the electric shock operation response respectively; The electric shock executive circuit links to each other with the bus ground connection supervising device that is used to monitor the secondary electric shock and limit the electric shock loop current; This bus ground connection supervising device is connected between the neutral line and the ground wire and has secondary electric shock feedback line to be connected with the intelligent distinguishing circuit through signal processing circuit, and the outage executive circuit links to each other with the main circuit power supply cut-off switch; The said electric-leakage detection circuit that touches comprises the ZCT that is arranged on the current supply circuit ground wire, and the ground wire on the current supply circuit is sampled and detected.Further, said bus ground connection supervising device comprises that inductance coil, the big said big capacity relay of capacity relay, inductance coil are serially connected on the ground wire.Bus ground connection supervising device adopts cooperatively interacting between electric capacity, inductance coil, resistance, relay, the transformer; Realization is to the control and the monitoring of zero line ground state; Good safeguards system ground connection, do not change under the prerequisite of mains supply structure, when the electric shock fault takes place; Can realize monitoring, take place or system's neutral line can send signal when unusual and carries out tripping operation as secondary failure to the electric shock situation.
Further, said bus ground connection supervising device comprises and is used for secondary is touched the mutual inductance device that the leakage current signal is converted into voltage signal that said mutual inductance device links to each other with the intelligent distinguishing circuit through signal processing circuit.Said mutual inductance device is the transforming circuit parallelly connected with inductance coil, and after bus ground connection supervising device activated, the mutual inductance device detected the variation of inductance coil voltage; Through transforming circuit detected voltage signal is sent to the intelligent distinguishing circuit through signal processing circuit; Compare with general sensed current signal, the utility model detects voltage signal, and not only the signal of its detection is more accurate; And being not easy all to receive the engineering interference, its reliability is higher.
Further, said electric shock executive circuit comprises the electric shock control circuit that is used to drive the work of bus ground connection supervising device, and the normally closed electric shock end of said electric shock control circuit is parallelly connected with the inductance coil of bus ground connection supervising device.Said electric shock executive circuit comprises relay K 2 and relay K 3; The normally closed electric shock end of relay K 3 is parallelly connected with the inductance coil of bus ground connection supervising device; Bus ground connection supervising device is to determine the control output activation signal that sends after the electric shock fault through the intelligent distinguishing circuit, after intelligent distinguishing circuit judgment signal is fault, and control relay K2 and relay K 3 work; After the activation; Originally the connected system neutral point is opened with the normally-closed contact of the relay K 3 on ground, and the reactor two ends parallelly connected with the contact can induce the voltage between system neutral and the ground, and this voltage can change with the size of system's zero sequence leakage current; Secondary gets an electric shock, and this voltage magnitude, phase place all can change when taking place, thereby can judge correspondingly that state of ground wire and secondary get an electric shock.
Further, said electric shock executive circuit also comprises an electric shock indicating circuit, and the electric shock indicating circuit links to each other with the electric shock control circuit.The electric shock indicating circuit is used to indicate the electric shock state; When system detects for the first time electric shock signal; The bright indication custom system of electric shock indicating circuit lamp is unusual; Get into the state of electric shock for the first time, bus ground connection supervising device restriction electric shock loop current reaches the personal safety scope, and the prompting user notes and prevent cutting off the power supply.
Further, the outage executive circuit comprises the power-off control circuit that is used to control the main circuit power supply cut-off switch, the operation indicating circuit that is used for the prompt system operation information and the cut-offing alarming circuit that is used to point out power alarm; Said operation indicating circuit links to each other with power-off control circuit respectively with cut-offing alarming circuit.Said power-off control circuit comprises outlet closing relay K1 etc.; Often the opening of relay K 1, normally-closed contact are connected with the main circuit power supply switch control circuit; When power supply just often, operation indicating circuit lamp bright prompt system normally moves, when electric leakage acquires a certain degree or intelligent distinguishing circuit when receiving secondary electric shock signal or abnormity of zero line signal; Power-off control circuit control main circuit power supply cut-off switch is implemented outage; Operation indicating circuit lamp goes out, and cut-offing alarming circuit is reported to the police, the outage of prompting custom system.
Further, said power circuit comprise transformer, rectification circuit that links to each other with transformer and the Voltage stabilizing module that links to each other with rectification circuit.Adopt this design of power circuit can improve the stability of system power supply, can not only regulated output voltage, and can improve the security performance of native system.
The beneficial effect of the utility model is: protective device is differentiated in a kind of electric leakage that detects the earth connection leakage current that the utility model adopts, power circuit, touch electric-leakage detection circuit, signal processing circuit, electric shock executive circuit, outage executive circuit, bus ground connection supervising device, main circuit power supply cut-off switch, the said electric-leakage detection circuit that touches comprises the ZCT that is arranged on the current supply circuit ground wire; Ground wire on the current supply circuit is sampled and detected, and the utility model touches electric-leakage detection circuit and through the ZCT that employing is arranged on the current supply circuit ground wire electric leakage and electric shock signal is gathered, and compares with general testing circuit; This mode only detects electric leakage and the electric shock signal on the ground wire, and it is constant not only to detect effect, and can effectively reduce the volume size of ZCT; Practiced thrift production cost, and can ZCT be built in the protective device, easier for installation; When electric shock accidents takes place; After signal processing circuit is amplified, determine electric shock signal and system's electric leakage signal from the detection signal that touches electric-leakage detection circuit, the connection situation of removing control bus ground connection supervising device and main circuit power supply cut-off switch through electric shock executive circuit or the executive circuit that cuts off the power supply respectively then through the intelligent distinguishing circuit; For the electric shock signal first time; Start bus ground connection supervising device, restriction electric shock loop current reaches within the personal safety scope, and cut off the power supply simultaneously executive circuit and main circuit power supply cut-off switch wouldn't cut off the power supply; Take place or bus ground connection supervising device detects when the electric shock fault takes place if any secondary failure or system exception phenomenon; The intelligent distinguishing circuit sends trip signal to the outage executive circuit and implements power-off protection through the main circuit power supply cut-off switch, does not take place as there being secondary failure within a certain period of time, and bus ground connection supervising device withdraws from; The operation that returns to normal of each circuit; Adopt this structure, its obvious effects can not have a power failure when electric shock accidents takes place exactly and implement protection, has adopted bus ground connection supervising device simultaneously; Do not change former electric network composition in the time of can keeping electrical network normally to move; Again can be when accident takes place, through change electric shock loop resistance value size limit touch, leakage current to personal safety scope, can also check system mode simultaneously; Can send the secondary failure signal; Can be according to the secondary electric shock detection signal of bus ground connection supervising device, the break-make through outage executive circuit control main circuit switch realizes safeguard protection.
Description of drawings
Below in conjunction with accompanying drawing and instance the utility model is described further.
Fig. 1 is that the utility model power supply touches, the whole theory diagram of earth leakage protective device.
Fig. 2 is that the utility model power supply touches, the theory diagram of earth leakage protective device.
Fig. 3 is that the utility model power supply touches, the physical circuit schematic diagram of earth leakage protective device.
Embodiment
With reference to Fig. 1-Fig. 3; A kind of capacitor fixing device of the utility model; Comprise and be used to each parts the power circuit 1 of power supply is provided, be used for detecting touching electric-leakage detection circuit 2, being used for from the signal processing circuit 3 that electric leakage signal is handled of touching of touching electric-leakage detection circuit 2 of sampling touching electric leakage signal; The output of signal processing circuit 3 is connected to and is used to differentiate the intelligent distinguishing circuit 4 that touches electric leakage signal; Said intelligent distinguishing circuit 4 links to each other with the outage executive circuit 6 that is used to carry out the outage operation response with the electric shock executive circuit 5 that is used to carry out the electric shock operation response respectively; Electric shock executive circuit 5 links to each other with the bus ground connection supervising device 8 that is used to monitor the secondary electric shock and limit the electric shock loop current; This bus ground connection supervising device 8 is connected between the neutral line and the ground wire and has secondary electric shock feedback line to be connected with intelligent distinguishing circuit 4 through signal processing circuit 3, and outage executive circuit 6 links to each other with main circuit power supply cut-off switch 7; The said electric-leakage detection circuit 2 that touches comprises the ZCT 21 that is arranged on the current supply circuit ground wire, and the ground wire on the current supply circuit is sampled and detected.The utility model touches electric-leakage detection circuit 2 and gathers through 21 pairs of electric leakages of ZCT and electric shock signal that employing is arranged on the current supply circuit ground wire, compares with general testing circuit, and this mode only detects electric leakage and the electric shock signal on the ground wire; It is constant not only to detect effect, and can effectively reduce the volume size of ZCT 21, has practiced thrift production cost; And can ZCT 21 be built in the protective device, easier for installation, when electric shock accidents takes place; After signal processing circuit 3 is amplified, determine electric shock signal and system's electric leakage signal from the detection signal that touches electric-leakage detection circuit 2, the connection situation of removing control bus ground connection supervising device 8 and main circuit power supply cut-off switch 7 through electric shock executive circuit 5 or outage executive circuit 6 respectively then through intelligent distinguishing circuit 4; For the electric shock signal first time, start bus ground connection supervising device 8, restriction electric shock loop current reaches within the personal safety scope; The executive circuit 6 of cutting off the power supply simultaneously wouldn't cut off the power supply with main circuit power supply cut-off switch 7, and if any secondary failure or the system exception phenomenon takes place or bus ground connection supervising device 8 detects when the electric shock fault takes place, intelligent distinguishing circuit 4 sends trip signal to outage executive circuit 6 and implements power-off protections through main circuit power supply cut-off switch 7; As do not have secondary failure within a certain period of time and take place; Bus ground connection supervising device 8 withdraws from, and this structure is adopted in the operation that returns to normal of each circuit; Its obvious effects can not have a power failure when electric shock accidents takes place exactly and implement protection; Adopt bus ground connection supervising device 8 simultaneously, do not changed former electric network composition in the time of can keeping electrical network normally to move, again can be when accident takes place; Through change electric shock loop resistance value size limit touch, leakage current to personal safety scope; Can also check system mode simultaneously, can send the secondary failure signal, can be according to the secondary electric shock detection signal of bus ground connection supervising device 8; Break-make through outage executive circuit 6 control main circuit switches realizes safeguard protection.
Further, said bus ground connection supervising device 8 comprises inductance coil 81, big capacity relay, and said inductance coil 81 is serially connected on the ground wire.Bus ground connection supervising device 8 adopts cooperatively interacting between electric capacity, inductance coil, resistance, relay, the transformer; Realization is to the control and the monitoring of zero line ground state; Good safeguards system ground connection, do not change under the prerequisite of mains supply structure, when the electric shock fault takes place; Can realize monitoring, take place or system's neutral line can send signal when unusual and carries out tripping operation as secondary failure to the electric shock situation.
Further, said bus ground connection supervising device 8 comprises and is used for secondary is touched the mutual inductance device 82 that the leakage current signal is converted into voltage signal that said mutual inductance device 82 links to each other with intelligent distinguishing circuit 4 through signal processing circuit 3.Said mutual inductance device 82 is the transforming circuit parallelly connected with inductance coil 81, and after bus ground connection supervising device 8 activated, mutual inductance device 82 detected the variation of inductance coil 81 voltage; Through transforming circuit detected voltage signal is sent to intelligent distinguishing circuit 4 through signal processing circuit 3; Compare with general sensed current signal, the utility model detects voltage signal, and not only the signal of its detection is more accurate; And being not easy all to receive the engineering interference, its reliability is higher.
Preferably, said signal processing circuit 3 comprises electronics amplifier elements such as triode.
Preferably, said intelligent distinguishing circuit 4 comprises two integrated package LM324, integrated package cd4098, integrated package cd4013 and auxiliary circuit thereof etc.
Further, said electric shock executive circuit 5 comprises the electric shock control circuit 51 that is used to drive 8 work of bus ground connection supervising device, and the normally closed electric shock end of said electric shock control circuit 51 is parallelly connected with the inductance coil 81 of bus ground connection supervising device 8.Said electric shock executive circuit 5 comprises relay K 2 and relay K 3; The normally closed electric shock end of relay K 3 is parallelly connected with the inductance coil 81 of bus ground connection supervising device 8; Bus ground connection supervising device 8 is to determine the control output activation signal that sends after the electric shock fault through intelligent distinguishing circuit 4, after intelligent distinguishing circuit 4 judgment signal are fault, and control relay K2 and relay K 3 work; After the activation; Originally the connected system neutral point is opened with the normally-closed contact of the relay K 3 on ground, and the reactor two ends parallelly connected with the contact can induce the voltage between system neutral and the ground, and this voltage can change with the size of system's zero sequence leakage current; Secondary gets an electric shock, and this voltage magnitude, phase place all can change when taking place, thereby can judge correspondingly that state of ground wire and secondary get an electric shock.
Further, said electric shock executive circuit 5 also comprises an electric shock indicating circuit 52, and electric shock indicating circuit 52 links to each other with electric shock control circuit 51.Electric shock indicating circuit 52 is used to indicate the electric shock state; When system detects for the first time electric shock signal; The bright indication custom system of electric shock indicating circuit 52 lamps is unusual; Get into the state of electric shock for the first time, bus ground connection supervising device 8 restriction electric shock loop currents reach the personal safety scope, and the prompting user notes and prevent cutting off the power supply.
Further, outage executive circuit 6 comprises the power-off control circuit 61 that is used to control main circuit power supply cut-off switch 7, is used for the operation indicating circuit 62 of prompt system operation information and is used to point out the cut-offing alarming circuit 63 of power alarm; Said operation indicating circuit 62 links to each other with power-off control circuit 61 respectively with cut-offing alarming circuit 63.Said power-off control circuit 61 comprises outlet closing relay K1 etc.; Often the opening of relay K 1, normally-closed contact are connected with the main circuit power supply switch control circuit; When power supply just often, operation indicating circuit 62 lamps bright prompt system normally moves, when electric leakage acquires a certain degree or intelligent distinguishing circuit 4 when receiving secondary electric shock signal or abnormity of zero line signal; Power-off control circuit 61 control main circuit power supply cut-off switchs 7 are implemented outage; Operation indicating circuit 62 lamps go out, and cut-offing alarming circuit 63 is reported to the police, the outage of prompting custom system.
Preferably, said main circuit power supply cut-off switch 7 comprises coil C, and said coil C is the closing coil of main circuit power supply switch.
Further, said power circuit 1 comprise transformer, rectification circuit that links to each other with transformer and the Voltage stabilizing module that links to each other with rectification circuit.Adopt this design of power circuit 1 can improve the stability of system power supply, can not only regulated output voltage, and can improve the security performance of native system.
In conjunction with Fig. 1-Fig. 3 and above-mentioned technical characterictic, the concrete structure and the course of work of the utility model are following, when the circuit normal power supply moves; Relay normally-closed contact K3 is closed; Its contact is firm and capacity is enough big, guarantees system's zero line good earth operation, does not change the electrical network original structure; When electric shock accidents takes place; The 21 pairs of electric leakages of ZCT or the electric shock signal that are arranged on the current supply circuit ground wire are gathered, and the signal that collects is amplified through signal processing circuit 3 deliver to intelligent distinguishing circuit 4, and intelligent distinguishing circuit 4 adopts integrated transporting discharging, filtering, shaping, discriminating, comparison and triggering, latchs integrated circuit; Electric shock signal differentiated with conventional background electric leakage signal separate; Belong to system's electric leakage if received electric current slowly changes, if Rapid Change belongs to electric shock, this partial circuit comprise signal sampling, filtering, amplification, pulse differentiate separate, voltage ratio, window relatively, link such as control output; Differentiating when intelligent distinguishing circuit 4 is electric shock signal; Normally closed switch on the electric shock executive circuit 5 breaks off with inductance coil 81 parallelly connected relay K 3, and bus ground connection supervising device 8 is activated, and automatically inductance coil is sealed in zero line ground connection; Reach the order ground of restriction electric shock loop current; Meanwhile, start lightning strike protection and touch electric-leakage detection circuit 2 work, monitor the zero line state at any time; Can detect the size whether generation of secondary electric shock accidents, zero line resistance to earth are arranged; And the size of system zero sequence voltage, in case unsafe signal occurs, can through holding mutual inductance device 82 detected current signal be changed into voltage signal rapidly; This signal, signal processing circuit 3 is sent to intelligent distinguishing circuit 4 judgment signal types after amplifying; This partial circuit comprises signal sampling, arrangement, amplification, pulse, phase place discriminating, window comparison, trigger links such as latching output differentiates signal, in case unsafe signal occurs, can cut off the power supply through the 1 cut-out main circuit power supply switch of the relay K in the control outage executive circuit 6 rapidly; If not unusual within a certain period of time on-the-spot the generation, control circuit can be removed bus ground connection supervising device 8, relay K 3 closings of contact, the operation of system restoration normality.
The above, the just preferred embodiment of the utility model, the utility model is not limited to above-mentioned execution mode, as long as it reaches the technique effect of the utility model with identical means, all should belong to the protection range of the utility model.
Claims (7)
1. protective device is differentiated in an electric leakage that detects the earth connection leakage current; It is characterized in that: comprise being used to each parts the power circuit of power supply (1) being provided, be used for detecting touching electric-leakage detection circuit (2), being used for from the signal processing circuit (3) that electric leakage signal is handled of touching of touching electric-leakage detection circuit (2) of sampling touching electric leakage signal; The output of signal processing circuit (3) is connected to and is used to differentiate the intelligent distinguishing circuit (4) that touches electric leakage signal; Said intelligent distinguishing circuit (4) links to each other with the outage executive circuit (6) that is used to carry out the outage operation response with the electric shock executive circuit (5) that is used to carry out the electric shock operation response respectively; Electric shock executive circuit (5) links to each other with the bus ground connection supervising device (8) that is used to monitor the secondary electric shock and limit the electric shock loop current; This bus ground connection supervising device (8) is connected between the neutral line and the ground wire and has secondary electric shock feedback line to be connected with intelligent distinguishing circuit (4) through signal processing circuit (3), and outage executive circuit (6) links to each other with main circuit power supply cut-off switch (7); The said electric-leakage detection circuit (2) that touches comprises the ZCT (21) that is arranged on the current supply circuit ground wire, and the ground wire on the current supply circuit is sampled and detected.
2. protective device is differentiated in a kind of electric leakage that detects the earth connection leakage current according to claim 1, it is characterized in that: said bus ground connection supervising device (8) comprises that inductance coil (81), big capacity relay, said big capacity relay, inductance coil (81) are serially connected on the ground wire.
3. protective device is differentiated in a kind of electric leakage that detects the earth connection leakage current according to claim 1 and 2; It is characterized in that: said bus ground connection supervising device (8) comprises and is used for secondary is touched the mutual inductance device (82) that the leakage current signal is converted into voltage signal that said mutual inductance device (82) links to each other with intelligent distinguishing circuit (4) through signal processing circuit (3).
4. protective device is differentiated in a kind of electric leakage that detects the earth connection leakage current according to claim 2; It is characterized in that: said electric shock executive circuit (5) comprises the electric shock control circuit (51) that is used to drive bus ground connection supervising device (8) work, and the normally closed electric shock end of said electric shock control circuit (51) is parallelly connected with the inductance coil (81) of bus ground connection supervising device (8).
5. protective device is differentiated in a kind of electric leakage that detects the earth connection leakage current according to claim 4; It is characterized in that: said electric shock executive circuit (5) also comprises an electric shock indicating circuit (52), and electric shock indicating circuit (52) links to each other with electric shock control circuit (51).
6. protective device is differentiated in a kind of electric leakage that detects the earth connection leakage current according to claim 1, and it is characterized in that: outage executive circuit (6) comprises the power-off control circuit (61) that is used to control main circuit power supply cut-off switch (7), the operation indicating circuit (62) that is used for the prompt system operation information and the cut-offing alarming circuit (63) that is used to point out power alarm; Said operation indicating circuit (62) links to each other with power-off control circuit (61) respectively with cut-offing alarming circuit (63).
7. protective device is differentiated in a kind of electric leakage that detects the earth connection leakage current according to claim 1, and it is characterized in that: said power circuit (1) comprises transformer, rectification circuit that links to each other with transformer and the Voltage stabilizing module that links to each other with rectification circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205611183U CN202488093U (en) | 2011-12-27 | 2011-12-27 | Electric leakage discriminating protection device for detecting ground wire leakage current |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205611183U CN202488093U (en) | 2011-12-27 | 2011-12-27 | Electric leakage discriminating protection device for detecting ground wire leakage current |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202488093U true CN202488093U (en) | 2012-10-10 |
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ID=46962484
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205611183U Expired - Fee Related CN202488093U (en) | 2011-12-27 | 2011-12-27 | Electric leakage discriminating protection device for detecting ground wire leakage current |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202488093U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103439627A (en) * | 2013-09-14 | 2013-12-11 | 株洲中车轨道交通装备有限公司 | Train power supply leakage current detecting system and method |
| CN107069648A (en) * | 2017-03-22 | 2017-08-18 | 广州炫通电气科技有限公司 | Earth leakage protecting method |
| CN110389277A (en) * | 2019-08-20 | 2019-10-29 | 深圳抛物线科技有限公司 | A kind of distributed wave recording devices and its Wave record method for power ground system |
| CN115085030A (en) * | 2022-06-07 | 2022-09-20 | 国网山东省电力公司东明县供电公司 | Power supply cabinet internal environment monitoring equipment |
-
2011
- 2011-12-27 CN CN2011205611183U patent/CN202488093U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103439627A (en) * | 2013-09-14 | 2013-12-11 | 株洲中车轨道交通装备有限公司 | Train power supply leakage current detecting system and method |
| CN103439627B (en) * | 2013-09-14 | 2015-12-23 | 株洲中车轨道交通装备有限公司 | Train power supply leakage current test system and detection method |
| CN107069648A (en) * | 2017-03-22 | 2017-08-18 | 广州炫通电气科技有限公司 | Earth leakage protecting method |
| CN107069648B (en) * | 2017-03-22 | 2019-03-29 | 广州炫通电气科技有限公司 | Earth leakage protecting method |
| CN110389277A (en) * | 2019-08-20 | 2019-10-29 | 深圳抛物线科技有限公司 | A kind of distributed wave recording devices and its Wave record method for power ground system |
| CN115085030A (en) * | 2022-06-07 | 2022-09-20 | 国网山东省电力公司东明县供电公司 | Power supply cabinet internal environment monitoring equipment |
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