CN105958439A - Leakage protection device having ground wire live-line indication function - Google Patents
Leakage protection device having ground wire live-line indication function Download PDFInfo
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- CN105958439A CN105958439A CN201610366439.5A CN201610366439A CN105958439A CN 105958439 A CN105958439 A CN 105958439A CN 201610366439 A CN201610366439 A CN 201610366439A CN 105958439 A CN105958439 A CN 105958439A
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- ground wire
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- controllable silicon
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/26—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents
- H02H3/32—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
Abstract
The invention discloses a leakage protection device having the ground wire live-line indication function, can not only prevent electric shock accidents caused by faults of electric appliances at a load end, but also can provide indication of previous live-line faults of leads. The leakage protection device comprises a load loop zero sequence current transformer, a ground wire loop zero sequence current transformer, a test loop and a release and locking device, wherein the release and locking device is internally provided with a solenoid, the solenoid and a control circuit of the solenoid are connected between a phase wire and a zero wire of the load end, and ground wire live-line indication circuits are connected among a ground wire, a phase wire and a zero wire of a power source end.
Description
Technical field
The present invention relates to Electrical Safety resist technology field, particularly relate to a kind of earth leakage protective device with ground wire electrification instruction.
Technical background
Existing all-powerful leakage protection device can detect the earth-fault current of the residual current between load end phase line and zero line and ground wire; residual current occurs between phase line and zero line and reaches during preset threshold values (such as: 10mA); it will be threaded off immediately, the switch contacts in disjunction ground wire, zero line and phase line；When ground wire earth-fault current occurs and reaches preset threshold values (such as: 10mA), it also can be threaded off immediately, cuts off ground wire, zero line and phase line, and can make the instruction of ground wire electrification.And this ground wire electrification instruction function is that the real-time status to ground wire makes instruction, when dangerous voltage certain in ground strip, ground wire electrification indicating circuit is triggered and produces indication signal, when, after the dangerous voltage disappearance that ground wire is carried, the indication signal of ground wire electrification indicating circuit disappears the most therewith.But, can make troubles for searching power failure reason and eliminating potential safety hazard.Such as: work as ground wire electrification, and after creating excessive ground wire grounded fault current, all-powerful leakage protection device can make the action cut off the electricity supply in time, and provides the instruction of a temporary ground wire electrification, reminds user to note, should get rid of power failure in time.As fault processes the most in time, the dangerous voltage carried once ground wire disappears or is reduced to certain value, and ground wire electrification instruction will disappear, and user is just difficult to learn the situation of power failure, even causes the fault being mistaken for all-powerful leakage protection device self.
Summary of the invention
It is an object of the invention to provide a kind of earth leakage protective device that can overcome above-mentioned all-powerful leakage protection device defect, it not only can occur when excessive earth-fault current occur in excessive residual current or ground wire disjunction being located at the ground wire of power end and load end in time between load end phase line and load end zero line, zero line and the switch contacts of phase line, lasting charged instruction can also be made to ground wire is the most charged, when ground wire electrification indication signal is not the most also continued by ground wire charged to be affected once being triggered, thus it is advantageous to the analysis to power failure and eliminating, guarantee that Electrical Safety is reliable.
Technical solution proposed by the invention is as follows:
A kind of earth leakage protective device with ground wire electrification instruction, including shell, power end phase line 3, power end zero line 5, power end ground wire 1, load end phase line 4, load end zero line 6, load circuit zero sequence current mutual inductor 17, load end ground wire 2, ground wire zero sequence current mutual inductor 18, test loop, control circuit 16, thread off and locker 15, this dropout and locker 15 comprise solenoid and one group of switch contacts of solenoid driving, control circuit 16 controls solenoid and leads to, power-off, at power end ground wire 1, connect between power end phase line 3 and power end zero line 5 and have ground wire electrification indicating circuit 19.nullDescribed ground wire electrification indicating circuit 19 is by the first resistance 7、Second resistance 8、Rectification circuit 9、Zener diode 13、Filter capacitor 14、Controllable silicon 10、Light emitting diode 11、3rd resistance 12 forms，When rectification circuit 9 uses full-wave bridge rectifier circuit，Two ac input ends of rectification circuit 9 are connected with power end zero line 5 and power end phase line 3 respectively，One end of second resistance 8 is connected with the output head anode of rectification circuit 9，The other end of the second resistance 8 and the positive pole of controllable silicon 10、The positive pole of filter capacitor 14、The negative pole of Zener diode 13 is connected，One end of first resistance 7 is connected with power end ground wire 1，The other end of the first resistance 7 is connected with the trigger electrode of controllable silicon 10，The negative pole of controllable silicon 10 is connected with the positive pole of light emitting diode 11，The negative pole of light emitting diode 11 and one end of the 3rd resistance 12 are connected，The other end of the 3rd resistance 12 and the positive pole of Zener diode 13、The negative pole of filter capacitor 14 is connected with the cathode output end of rectification circuit 9.Above-mentioned rectification circuit 9 can also use half-wave rectifying circuit.
nullAfter a kind of earth leakage protective device with ground wire electrification instruction accesses power supply，Power end phase line 3 and power end zero line 5 provide power supply for ground wire electrification indicating circuit 19，After power supply rectified circuit 9 rectification，Unidirectional current inputs the positive pole of controllable silicon 10 after the second resistance 8 blood pressure lowering，The negative pole of controllable silicon 10 accesses the negative pole end of rectification circuit 9 through light emitting diode 11 and the 3rd resistance 12，Zener diode 13 and filter capacitor 14 are controllable silicon 10、Light emitting diode 11 and the 3rd resistance 12 provide stable voltage，Controllable silicon 10 is just、Negative pole bears forward bias voltage，Power end ground wire 1 is connected to the trigger electrode of controllable silicon 10 by the first resistance 7，Once power end ground wire 1 is charged，The toggled conducting of controllable silicon 10，Light emitting diode 11 energising is lighted，As long as controllable silicon 10 is just、Negative pole still maintains forward conduction electric current，Even if power end ground wire 1 is the most charged，Controllable silicon 10 also will not turn off，Light emitting diode 11 electrified light emitting the most always.
Compared with prior art, the present invention has a following remarkable result:
(1) the ground wire electrification indicating circuit one of a kind of earth leakage protective device with ground wire electrification instruction of the present invention is triggered; controllable silicon will maintain conducting always; then whether light emitting diode 11 electrified light emitting is not continued to be affected with dangerous voltage by ground wire 1, unless the power supply of this earth leakage protective device power end is cut off.
(2) the ground wire electrification indicating circuit of a kind of earth leakage protective device with ground wire electrification instruction of the present invention is triggered due to one; controllable silicon will be constantly on and made instruction by light emitting diode; so it is advantageous to the analysis of causes and the failture evacuation of Electrical Safety; avoid the generation of the fault erroneous judgement caused because indication signal disappears, make Electrical Safety relatively reliable.
Accompanying drawing explanation
Fig. 1 is the circuit theory schematic diagram of a kind of earth leakage protective device with ground wire electrification instruction of one embodiment of the present of invention, and the rectification circuit 9 in figure uses full-wave bridge rectifier circuit.
Fig. 2 is the circuit theory schematic diagram of an alternative embodiment of the invention, and the rectification circuit 9 in figure uses half-wave full-wave rectifying circuit.
Detailed description of the invention
By example below, the present invention is further elaborated.
Embodiment 1
nullAs shown in Figure 1，A kind of earth leakage protective device with ground wire electrification instruction of the present invention，By shell、Power end phase line 3、Power end zero line 5、Power end ground wire 1、Load end phase line 4、Load end zero line 6、Load circuit zero sequence current mutual inductor 17、Load end ground wire 2、Ground wire zero sequence current mutual inductor 18、Test loop、Ground wire electrification indicating circuit 19、Control circuit 16、Thread off and locker 15 forms，One group of switch contacts that described dropout is driven by solenoid and this solenoid with locker 15 forms，This group switch contacts is totally three to being connected to power end phase、Zero、Ground wire 3、5、1 and load end phase、Zero、Ground wire 4、6、Between 2，Control circuit 16 controls solenoid and leads to、Power-off，At power end ground wire 1、Connect between power end phase line 3 and power end zero line 5 and have ground wire electrification indicating circuit 19.nullDescribed ground wire electrification indicating circuit 19 is by the first resistance 7、Second resistance 8、First diode 21、Second diode 22、3rd diode 23、4th diode 24、Zener diode 13、Filter capacitor 14、Controllable silicon 10、Light emitting diode 11、3rd resistance 12 forms，The positive pole of the first diode 21 is connected with the negative pole of the 4th diode 24 and power end phase line 3，The positive pole of the second diode 22 is connected with the negative pole of the 3rd diode 23 and power end zero line 5，The negative pole of the first diode 21 and one end of the negative pole of the second diode 22 and the second resistance 8 are connected，The other end of the second resistance 8 and the positive pole of controllable silicon 10、The positive pole of filter capacitor 14、The negative pole of Zener diode 13 is connected，One end of first resistance 7 is connected with power end ground wire 1，The other end of the first resistance 7 is connected with the trigger electrode of controllable silicon 10，The negative pole of controllable silicon 10 is connected with the positive pole of light emitting diode 11，The negative pole of light emitting diode 11 and one end of the 3rd resistance 12 are connected，The other end of the 3rd resistance 12 and the positive pole of Zener diode 13、The negative pole of filter capacitor 14、The positive pole of the 3rd diode 23 and the positive pole of the 4th diode 24 are connected.The rectification circuit 9 of the present embodiment uses full-wave bridge rectifier circuit, and this bridge rectifier is made up of first diode the 21, second diode the 22, the 3rd diode 23 and the 4th diode 24.
nullAfter this earth leakage protective device accesses power supply，Power end phase line 3 is powered for ground wire electrification indicating circuit 19 with power end zero line 5，First diode 21、Second diode 22、3rd diode 23 and the full-wave bridge rectifier circuit of the 4th diode 24 composition，It is the second resistance 8、Controllable silicon 10、Light emitting diode 11、3rd resistance 12、Zener diode 13 and filter capacitor 14 provide DC source，Second resistance 8、Zener diode 13、Filter capacitor 14 is controllable silicon 10、Light emitting diode 11 and the 3rd resistance 12 provide the constant voltage dc source after blood pressure lowering，The trigger electrode of controllable silicon 10 is connected with power end ground wire 1 by the first resistance 7 and is received ground wire electrification signal，When ground wire occurs charged，Controllable silicon 10 is triggered conducting，Light emitting diode 11 energising is lighted，Now，Even if the charged signal of power end ground wire 1 disappears，But controllable silicon 10 still maintains forward conduction，Electric current is also the most constantly on，Light emitting diode 11 electrified light emitting the most always，Show the indication signal that ground wire is the most charged always.
The earth leakage protective device owing to the present invention is a kind of with ground wire electrification instruction is the most charged to ground wire, just can make continual charged instruction, so, be advantageous to the analyzing and processing to power failure.
Embodiment 2
nullAs shown in Figure 2，The another kind of the present invention has the earth leakage protective device of ground wire electrification instruction，By shell、Power end phase line 3、Power end zero line 5、Power end ground wire 1、Load end phase line 4、Load end zero line 6、Load circuit zero sequence current mutual inductor 17、Load end ground wire 2、Ground wire zero sequence current mutual inductor 18、Test loop、Ground wire electrification indicating circuit 19、Control circuit 16、Thread off and locker 15 forms，One group of switch contacts that described dropout is driven by solenoid and this solenoid with locker 15 forms，This group switch contacts is totally three to being connected to power end phase、Zero、Ground wire 3、5、1 and load end phase、Zero、Ground wire 4、6、Between 2，Control circuit 16 controls solenoid and leads to、Power-off，At power end ground wire 1、Connect between power end phase line 3 and power end zero line 5 and have ground wire electrification indicating circuit 19.nullDescribed electrification indicating circuit 19 is by the first resistance 7、Second resistance 8、5th diode 20、Zener diode 13、Filter capacitor 14、Controllable silicon 10、Light emitting diode 11、3rd resistance 12 forms，The positive pole of the 5th diode 20 is connected with power end phase line 3，One end of 5th diode 20 negative pole and the second resistance 8 is connected，The other end of the second resistance 8 and the positive pole of controllable silicon 10、The positive pole of filter capacitor 14、The negative pole of Zener diode 13 is connected，One end of first resistance 7 is connected with power end ground wire 1，The other end of the first resistance 7 is connected with the trigger electrode of controllable silicon 10，The negative pole of controllable silicon 10 is connected with the positive pole of light emitting diode 11，The negative pole of light emitting diode 11 and one end of the 3rd resistance 12 are connected，The other end of the 3rd resistance 12 and the positive pole of Zener diode 13、The negative pole of filter capacitor 14 is connected with power end zero line 5.
nullAfter this earth leakage protective device accesses power supply，Power end phase line 3 and power end zero line 5 are that the 5th diode 20 in ground wire electrification indicating circuit 19 is powered，The rectification circuit 9 of the present embodiment uses half-wave rectifying circuit，Power supply is made halfwave rectifier by the i.e. the 5th diode 20，It is the second resistance 8、Controllable silicon 10、Light emitting diode 11、3rd resistance 12、Zener diode 13 and filter capacitor 14 provide pulse dc power，Second resistance 8、Zener diode 13、Filter capacitor 14 is controllable silicon 10、Light emitting diode 11 and the 3rd resistance 12 provide the constant voltage dc source after blood pressure lowering，The trigger electrode of controllable silicon 10 is connected with power end ground wire 1 by the first resistance 7 and is received ground wire electrification signal，When ground wire occurs charged，Controllable silicon 10 is triggered conducting，Light emitting diode 11 energising is lighted，Now，Even if the charged signal of power end ground wire 1 disappears，But controllable silicon 10 still maintains forward conduction，Electric current is also the most constantly on，Light emitting diode 11 electrified light emitting the most always，Show the indication signal that ground wire is the most charged always.
Claims (3)
1. an earth leakage protective device with ground wire electrification instruction, comprise shell, power end phase line (3), power end zero line (5), power end ground wire (1), load end phase line (4), load end zero line (6), load circuit zero sequence current mutual inductor (17), load end ground wire (2), ground wire zero sequence current mutual inductor (18), test loop, thread off and locker (15), control circuit (16), this dropout and locker (15) comprise solenoid and one group of switch contacts of solenoid driving, control circuit (16) controls solenoid and leads to, power-off, it is characterized in that: described power end ground wire (1), connect between power end phase line (3) and power end zero line (5) and have ground wire electrification indicating circuit (19).
nullThe earth leakage protective device with ground wire electrification instruction the most according to claim 1，It is characterized in that: described ground wire electrification indicating circuit (19) is by the first resistance (7)、Second resistance (8)、Rectification circuit (9)、Controllable silicon (10)、Light emitting diode (11)、3rd resistance (12)、Zener diode (13) and filter capacitor (14) composition，Two ac input ends of rectification circuit (9) are connected with power end phase line (3) with power end zero line (5) respectively，One end of second resistance (8) is connected with the output head anode of rectification circuit (9)，The other end of the second resistance (8) and the positive pole of controllable silicon (10)、The positive pole of filter capacitor (14)、The negative pole of Zener diode (13) is connected，One end of first resistance (7) is connected with power end ground wire (1)，The other end of the first resistance (7) is connected with the trigger electrode of controllable silicon (10)，The negative pole of controllable silicon (10) is connected with the positive pole of light emitting diode (11)，The negative pole of light emitting diode (11) and one end of the 3rd resistance (12) are connected，The other end of the 3rd resistance (12) and the positive pole of Zener diode (13)、The negative pole of filter capacitor (14) is connected with the cathode output end of rectification circuit (9).
The earth leakage protective device with ground wire electrification instruction the most according to claim 2, it is characterised in that: described rectification circuit (9) uses full-wave bridge rectifier circuit or half-wave rectifying circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610366439.5A CN105958439A (en) | 2016-05-30 | 2016-05-30 | Leakage protection device having ground wire live-line indication function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610366439.5A CN105958439A (en) | 2016-05-30 | 2016-05-30 | Leakage protection device having ground wire live-line indication function |
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| CN105958439A true CN105958439A (en) | 2016-09-21 |
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| CN201610366439.5A Pending CN105958439A (en) | 2016-05-30 | 2016-05-30 | Leakage protection device having ground wire live-line indication function |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108695820A (en) * | 2018-07-21 | 2018-10-23 | 朱德锋 | Anti-reverse electrical ground protection system |
| CN109546618A (en) * | 2018-12-25 | 2019-03-29 | 中山市开普电器有限公司 | Band powers on the leakage protection circuit for the automatic tripping function that automatically resets, powers off |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103346443A (en) * | 2013-06-20 | 2013-10-09 | 佛山市顺德区澳骏电子科技有限公司 | Safe earth leakage protection plug giving alarm about earth wire electrification abnormity |
| CN204720959U (en) * | 2015-05-25 | 2015-10-21 | 余姚市嘉荣电子电器有限公司 | EN dividing potential drop sampling type earth leakage protective device |
| CN105403756A (en) * | 2015-11-25 | 2016-03-16 | 佛山市顺德区澳骏电子科技有限公司 | Circuit device having ground wire live detection function |
-
2016
- 2016-05-30 CN CN201610366439.5A patent/CN105958439A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103346443A (en) * | 2013-06-20 | 2013-10-09 | 佛山市顺德区澳骏电子科技有限公司 | Safe earth leakage protection plug giving alarm about earth wire electrification abnormity |
| CN204720959U (en) * | 2015-05-25 | 2015-10-21 | 余姚市嘉荣电子电器有限公司 | EN dividing potential drop sampling type earth leakage protective device |
| CN105403756A (en) * | 2015-11-25 | 2016-03-16 | 佛山市顺德区澳骏电子科技有限公司 | Circuit device having ground wire live detection function |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108695820A (en) * | 2018-07-21 | 2018-10-23 | 朱德锋 | Anti-reverse electrical ground protection system |
| CN109546618A (en) * | 2018-12-25 | 2019-03-29 | 中山市开普电器有限公司 | Band powers on the leakage protection circuit for the automatic tripping function that automatically resets, powers off |
| CN109546618B (en) * | 2018-12-25 | 2024-02-02 | 中山市开普电器有限公司 | Leakage protection circuit with power-on automatic reset and power-off automatic trip functions |
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Application publication date: 20160921 |
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