CN101276713A - Earth leakage detection apparatus - Google Patents
Earth leakage detection apparatus Download PDFInfo
- Publication number
- CN101276713A CN101276713A CNA2008100885353A CN200810088535A CN101276713A CN 101276713 A CN101276713 A CN 101276713A CN A2008100885353 A CNA2008100885353 A CN A2008100885353A CN 200810088535 A CN200810088535 A CN 200810088535A CN 101276713 A CN101276713 A CN 101276713A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/52—Testing for short-circuits, leakage current or ground faults
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/28—Provision in measuring instruments for reference values, e.g. standard voltage, standard waveform
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R17/00—Measuring arrangements involving comparison with a reference value, e.g. bridge
- G01R17/02—Arrangements in which the value to be measured is automatically compared with a reference value
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16566—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533
- G01R19/1659—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533 to indicate that the value is within or outside a predetermined range of values (window)
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
- H01H83/02—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by earth fault currents
- H01H83/04—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by earth fault currents with testing means for indicating the ability of the switch or relay to function properly
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Emergency Protection Circuit Devices (AREA)
- Breakers (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The invention provides a test circuit of a leakage detection device, which can not be induced by usual mode noise in a test coil of a zero phase converter and can resist the induction radiating electromagnetic wave noise for grounding wires of the leakage detection device so that the leakage detection sensitivity is stable. In the test circuit supplying test current for the test coil (11) of the zero phase converter (4) of the leakage detection device (3), one end of the test coil (11) of the zero phase converter (4) is connected with one alternating current input end of a rectification circuit (10) by the contact point (8A) of a test switch (8), and the terminal of the test coil not connected with the test switch is connected with another alternating current input end of the rectification circuit (10) by a diode (D) with the polarity to be anode facing to the end of the test coil.
Description
Technical field
The present invention relates to detect the generation and the open circuit of the electric leakage that causes because of the ground wire in the circuit etc., the earth detector that in the electric leakage accident, uses in the residual current circuit breaker of protection load and circuit etc.
Background technology
In earth detector, be provided with and be used for its test circuit whether regular event is confirmed.Fig. 3 represents, in residual current circuit breaker, possesses in the prior art by the circuit structure of the earth detector of widely used test circuit.
In this Fig. 3,1 is residual current circuit breaker, and R, S, T are the power supply side terminal of this residual current circuit breaker 1, U, V, W be respectively with power supply side terminal R, S, load side terminal that T is corresponding.Residual current circuit breaker 1 possesses the main circuit 2 that the conductor by the three-phase that connects power supply side terminal R, S, T and load side terminal U, V, W respectively constitutes in inside.In this main circuit 2, be provided with 2A of disconnection portion that possesses the switching contact that opens and closes main circuit 2 and the overcurrent that detects each phase conductor of main circuit 2, drive the overcurrent detecting device 2B that trip gear 2C opens the switching contact disconnection main circuit 2 of the 2A of disconnection portion.
Residual current circuit breaker 1 also possesses earth detector 3, and this earth detector 3 detects the leakage current that flows through in main circuit 2, thereby drives the switching contact disconnection main circuit 2 that trip gear 2C opens the 2A of disconnection portion.
Earth detector 3 is made of rectification circuit 10 that possesses package and have the zero phase current transformer 4 of the toroidal core 4A of secondary coil 5 and test coil 11, electric-leakage detection circuit 6, breaking coil (trip coil) 7, Test Switchboard 8, is made of diode bridge rectifier circuit etc.Rectification circuit 10 is for becoming direct voltage with the R phase conductor of main circuit 2 with AC voltage conversion between the T phase conductor, and supplies with to electric-leakage detection circuit 6 and to move the DC power supply of electric power.
Zero phase current transformer 4 is, make conductor connect the toroidal core 4A that package has secondary coil 5 and test coil 11 as the full phase of the main circuit 2 of Primary Conductor, thus, detect because of with not shown load circuit that main circuit 2 is connected in the ground fault, the Zero-phase current that the electric leakage accident flows in main circuit 2 that take place, and derive the device of these electric currents by secondary coil 5.Electric-leakage detection circuit 6 is judged zero size that detects electric current (detection of electrical leakage electric current) mutually that derives from the secondary coil 5 of zero phase current transformer 4, when this zero detects the predefined fiducial value of current ratio when big mutually, then produces the detection of electrical leakage signal of the generation of expression electric leakage.
When producing the detection of electrical leakage signal of the generation of representing electric leakage by this electric-leakage detection circuit 6, then breaking coil 7 is by excitation, and trip gear 2C is driven, and the 2A of disconnection portion is disconnected by dropout thus.Thus, main circuit 2 is disconnected, and just can protect the not shown load circuit that is connected with residual current circuit breaker 1 in ground fault, electric leakage accident.
In addition, with test resistance 12 test coil 11 that is arranged on the zero phase current transformer 4 is connected by test contacts 8A with the T phase conductor with the R phase conductor of main circuit 2, constitute test circuit thus, wherein, test contacts 8A is opened and closed by the pressing operation of the pressing button 8B of Test Switchboard 8.Carry out pressing operation by pressing button 8B and close test contacts 8A Test Switchboard 8, can whether regular event be tested to earth detector 3.That is by pressing button 8B is carried out pressing operation, because of the R phase conductor and the voltage between the T phase conductor of main circuit 2 passes through test resistance 12 and test contacts 8A circulating current in test coil 11, thus the analogue zero phase current can take place.By test resistance 12, this analogue zero phase current is selected as surpassing the size of the regulation of the fiducial value of setting in electric-leakage detection circuit 6.
Therefore, if the trip gear 2C of electric-leakage detection circuit 6, residual current circuit breaker 1 etc. are normal, then at this moment by detecting electric current mutually from zero of secondary coil 5 derivation, electric-leakage detection circuit 6 produces the detection of electrical leakage signal of the generation of expression electric leakage, by the trip gear 2C disconnection disconnection 2A of portion.Disconnection action by this residual current circuit breaker 1 can be confirmed the situation of earth detector 3 and residual current circuit breaker 1 self regular event.
In addition, at this moment,, then can confirm to exist unusual in a certain position of earth detector 3, residual current circuit breaker 1 if residual current circuit breaker 1 does not disconnect action.
In the test circuit of such earth detector 3, between the secondary coil 5 of zero phase current transformer 4 and test coil 11, there is parasitic electrostatic capacitance C
0And, because the face terminals of the direct current of rectification circuit 10 output is connected with the signal ground SG of the ground connection side of the electronic circuit of conduct formation electric-leakage detection circuit 6 grades, so the secondary coil 5 that is connected with electric-leakage detection circuit 6 is roughly the current potential of signal ground SG.
On the other hand, because test coil 11 is connected by 2 mutually conductors of test contacts 8A and test resistance 12 and main circuit 2, so (promptly at ordinary times, test contacts 8A opens, residual current circuit breaker 1 monitors the state of electric leakage), be positioned at T current potential mutually with the main circuit 2 of the side connection of the ac input end of rectification circuit 10.And signal ground SG is respectively the T phase of main circuit 2 or the current potential of R phase according to the conducting state of 2 diode Dr2, Dt2 of the following side arm (arm) of the diode bridge that constitutes rectification circuit 10.
For this reason, between test coil 11 and secondary coil 5, apply the voltage e of the half wave rectification wave of RT voltage between phases as shown in Figure 5.Because this voltage e is at parasitic electrostatic capacitance C
0, electric-leakage detection circuit 6 the noise current i of path flow shown in the dotted arrow among Fig. 3 of direct current supply line (being also referred to as earth connection) a of input signal cable c, electric-leakage detection circuit 6, minus side.
But the paired input terminal that is connected with the electric-leakage detection circuit 6 of paired input signal cable b is the input terminal of not shown comparison amplifier, although the impedance structure imbalance when this paired input terminal divides earth connection a side.For this reason, cause between the paired input terminal of electric-leakage detection circuit 6, producing induced voltage e because of this noise circuit i
1, the problem that exists the action sensitivity of residual current circuit breaker 1 to change.
In order to address this problem a little, propose just like the earth detector shown in the patent documentation 1.Fig. 4 represents the circuit structure of the existing earth detector shown in this patent documentation 1.
This existing apparatus shown in Figure 4 with the dissimilarity of existing apparatus shown in Figure 3 is: a terminal of the test coil 11 of zero phase current transformer 4 is connected with the T phase conductor of main circuit 2 by the series circuit of test contacts 8A and test resistance 12, and another terminal that is not connected with test contacts 8A directly is connected on the earth connection a of minus side of direct current output of the rectification circuit 10 that is connected with signal ground SG.Other structure is identical with existing apparatus shown in Figure 3.
If constitute as described above, then test coil 11 is connected with the earth connection a of rectification circuit 10, a becomes idiostatic with this earth connection, therefore, voltage that can the sensed normal mode that becomes half wave rectification wave (common mode) as shown in Figure 5 in this test coil 11, so the detection sensitivity of earth detector 3 can not change, become stable.
But in this existing apparatus, because be provided with the connecting line f that the test coil 11 that is used to make zero phase current transformer 4 is connected with the earth connection a of rectification circuit 10, this connecting line f becomes antenna, has the shortcoming for the repellence variation of launching electromagnetic wave noise.That is, when the launching electromagnetic wave noise is grounded line a induction by this connecting line f, then produce the potential change of earth connection a, detection of electrical leakage change of sensitivity, problem of unstable.
Patent documentation 1: the Japan Patent spy opens the 2003-249160 communique
Summary of the invention
The present invention is in order to solve the problem points in the aforesaid existing apparatus, provide a kind of and can in the test coil of zero phase current transformer 4, not respond to the normal mode noise, and inhibition is to the induction of the launching electromagnetic wave noise of the earth connection of earth detector, the earth detector that detection of electrical leakage sensitivity is stable.
The present invention is in order to address the above problem, a kind of earth detector is provided, it possesses: zero phase current transformer, it makes the conductor of main circuit connect the toroidal core that is provided with secondary coil and test coil, detects the Zero-phase current that circulates and also this Zero-phase current is derived from above-mentioned secondary coil in this main circuit; Electric-leakage detection circuit, it judges zero size that detects electric current mutually that derives from the secondary coil of this zero phase current transformer, when this zero detects the predefined fiducial value of current ratio mutually and then export the detection of electrical leakage signal of the generation of expression electric leakage when big; DC power supply, it is that direct voltage and the rectification circuit that supplies to above-mentioned electric-leakage detection circuit constitute by the AC voltage conversion with AC power; And test circuit, it comprises the Test Switchboard of closing and supply with measuring current when only the test coil on being arranged at above-mentioned zero phase current transformer carries out motion test, this earth detector is characterised in that: an end of the test coil of the zero phase current transformer in the above-mentioned test circuit is connected with an ac input end of above-mentioned rectification circuit by above-mentioned Test Switchboard, and another terminal that does not connect Test Switchboard of above-mentioned test coil becomes anode (cathode) by polarity and is connected with another ac input end of above-mentioned rectification circuit towards the diode of test coil end.
According to the present invention, an end that is connected with Test Switchboard one side of test coil is connected with an ac input end of the rectification circuit of the DC power supply that constitutes electric-leakage detection circuit, and, the other end of a side that does not connect Test Switchboard of test coil becomes anode by polarity and is connected with the other end of the ac input end of above-mentioned rectification circuit towards the diode of test coil end one side, so the diode that the normal mode voltage that is applied to test coil from AC power is inserted in the test circuit stops, and can eliminate the induction to the normal mode voltage of test coil.In addition, because do not connect the connecting line of the test coil of the earth connection of electric-leakage detection circuit and zero phase current transformer, so can suppress to radiate the induction of electromagnetic wave noise.Therefore, the induction of noise of the action sensitivity change of earth detector can be suppressed to make, thereby the action sensitivity of earth detector can be stably kept.Therefore, can provide action stable earth detector.
Description of drawings
Fig. 1 is the circuit structure diagram of expression based on the earth detector of embodiments of the invention 1.
Fig. 2 is the circuit structure diagram of expression based on the earth detector of embodiments of the invention 2.
Fig. 3 is the circuit structure diagram of the existing earth detector of expression.
Fig. 4 is the circuit structure diagram of the existing different earth detectors of expression.
Fig. 5 is the voltage oscillogram that is used in the device of action specification of existing earth detector of Fig. 3.
The explanation of symbol
1: residual current circuit breaker
2A: disconnection portion
3: earth detector
4: zero phase current transformer
5: secondary coil
6: electric-leakage detection circuit
7: breaking coil
8: Test Switchboard
9: output relay
10: rectification circuit
11: test coil
D: diode
Embodiment
Embodiment shown in reference to the accompanying drawings describes embodiments of the present invention below.
(embodiment 1)
Fig. 1 is the circuit structure diagram that expression applies the present invention to the embodiment 1 of residual current circuit breaker.
Embodiments of the invention 1 shown in Figure 1 exist different with above-mentioned existing apparatus shown in Figure 4 in the following areas.
Promptly, supply with in the test circuit of measuring currents at test coil 11 zero phase current transformer 4 of earth detector 3, ac input end on the R phase conductor that is connected in main circuit 2 of the contact 8A of one end of test coil 11 by Test Switchboard 8 and the rectification circuit 10 that constitutes DC power supply is connected, the other end of test coil 11 is not connected with earth connection a, and is connected by the ac input end on the T phase conductor that is connected in main circuit 2 of diode D and test resistance 12 and rectification circuit 10.This diode D is inserted into the polarity of anode (cathode) towards test coil 11 1 sides.Because the structure of other of present embodiment 1 is identical with above-mentioned existing apparatus, so for same element annotation prosign, and omit its explanation.
The residual current circuit breaker 1 of earth detector 3 that possesses the embodiment 1 of Fig. 1 is carried out same action with existing apparatus basically.That is, under common electric leakage monitored state, Test Switchboard 85 is not operated, and test contacts 8A is the state of opening.If in main circuit 2, produce Zero-phase current, then detect electric current mutually and derived from secondary coil 5 with its size corresponding zero because of electric leakage waits.Zero sizes that detect electric current mutually that 6 pairs of electric-leakage detection circuits are derived from the secondary coil 5 of zero phase current transformer 4 judge, when this zero detects the predefined fiducial value of current ratio when big mutually, just produce the detection of electrical leakage signal of the generation of expression electric leakage.
Thus; to breaking coil 7 excitations and drive the trip gear 2C of residual current circuit breaker 1, draw back the breech lock (latch) of the 2A of disconnection portion, open the switching contact; disconnect main circuit 2 thus, the not shown load circuit that protection is connected with load side terminal U, V, W in the electric leakage accident.
In addition, under the situation of the motion test of carrying out residual current circuit breaker 1 and earth detector 3, the pressing button 8B of Test Switchboard 8 is carried out pressing operation.Thereupon, by closing contact 8A, can utilize the R phase conductor of main circuit 2 and the alternating voltage between the T phase conductor is supplied with the Zero-phase current more than the simulation fiducial value rank to test coil 11 by test resistance 12 and test contacts 8A measuring current.
If the trip gear 2C of earth detector 3, residual current circuit breaker 1 etc. are normal, then at this moment from the detection electric current of secondary coil 5 derivation based on the analogue zero phase current, electric-leakage detection circuit 6 detects the generation of electric leakage, produces the detection of electrical leakage signal of the generation of expression electric leakage.Since this detection of electrical leakage signal, breaking coil 7, trip gear 2C action, the 2A of disconnection portion of disconnection residual current circuit breaker 1.Can confirm that thus earth detector 3 and residual current circuit breaker 1 normally move.
At this moment, if in electric-leakage detection circuit 6, breaking coil 7 and trip gear 2C etc., have unusual, then because the 2A of disconnection portion of residual current circuit breaker 1 does not disconnect action, so can confirm thus to exist unusual in a certain position of residual current circuit breaker 1 or earth detector 3.
On the other hand, though on power supply side terminal R, the S of the residual current circuit breaker 1 in present embodiment 1, the T, generally apply the AC supply voltage about 100V～415V, but in the electric-leakage detection circuit 6 of earth detector 3, carry out full-wave rectification by 10 pairs of these AC supply voltage of rectification circuit, apply the direct voltage that is lowered to about 10V by limiting resistance 15 and smmothing capacitor 16.
Therefore, the power line b of electric-leakage detection circuit 6 and the part of incoming line c roughly are in the approaching current potential of current potential with power line (earth connection) a.On the other hand, when the current potential of the AC power cord d that connects on the terminal in the side that does not connect test contacts 8A of test coil 11 is benchmark with the current potential of the earth connection a of the rectification circuit 10 that constitutes DC power supply, just be transformed to half wave rectification wave shown in Figure 5.But, on the terminal of the side that does not connect test contacts 8A of test coil 11, because diode D is connected with the polarity of anode towards this terminal one side, so be prevented from than the high current potential of current potential of the earth connection a of AC power cord d.Therefore, between test coil 11 and secondary coil 5, do not produce potential difference, noise that can sensed normal mode in secondary coil 5.Therefore, action sensitivity is stable when the electric leakage of earth detector 3 monitors action does not change.
In addition, according to the device of this embodiment 1, because omission replaces inserting again diode D to the connecting line of the earth connection a of DC power supply circuit in test coil 11, so can suppress to radiate the induction of electromagnetic wave noise, therefore can stablize the action sensitivity of earth detector.
(embodiment 2)
Fig. 2 represents to apply the present invention to the embodiment 2 in the earth leakage protective relay.
This embodiment 2 has following structure on circuit constitutes: remove breaker portion from the residual current circuit breaker of embodiment 1, that is, open and close contact (disconnection portion) 2A, overcurrent detecting device 2B and tripping mechanism 2C, be provided with output relay 9 and substitute breaking coil 7.In addition, though the earth detector of this embodiment 2 has and the identical in fact structure of earth detector shown in the embodiment 1, but as the AC power for rectification circuit 10 and test coil 11, difference is in order to be connected with power input terminal X, Y with main circuit 2 AC power in addition.
In the device of this embodiment 2, wait the Zero-phase current that causes if in the main circuit 2 that monitors electric leakage, take place because of electric leakage, the then zero electric current that detects is mutually derived from secondary coil 5, judge its size by electric-leakage detection circuit 6 again, if surpass fiducial value, then produce the detection of electrical leakage signal, close its contact 9A by output relay 9, report detects electric leakage.
In addition, form the ac input end and power input terminal X, the Y connection that is connected outside AC power of the rectification circuit 10 of DC power supply.One end of the test coil 11 of zero phase current transformer 4 also is connected with power input terminal X by the contact 8A of Test Switchboard 8, and the other end is connected with power input terminal Y with test resistance 12 by diode D.The anode of diode D is towards test coil 11 ends one side.
Therefore, in this embodiment 2, because the current potential of the earth connection a that is connected with respect to the negative pole with the output of the direct current of rectification circuit 10 is become the voltage that the test coil 11 of high potential applies to be stoped by diode D, so between test coil 11 and secondary coil 5, do not produce potential difference, disappear to the induction of the normal mode noise of secondary coil 5.And, because also not to the connection of the unnecessary distribution of earth connection a, so can also suppress to radiate the induction of electromagnetic wave noise.Therefore, even in the earth detector 3 of this embodiment 2, also can make electric leakage monitor that the action sensitivity in the action is stable.
Claims (1)
1. earth detector possesses:
Zero phase current transformer, it makes the conductor of main circuit connect the toroidal core that is provided with secondary coil and test coil, detects the Zero-phase current that circulates and also this Zero-phase current is derived from described secondary coil in this main circuit;
Electric-leakage detection circuit, it judges zero size that detects electric current mutually that derives from the secondary coil of this zero phase current transformer, when this zero detects the predefined fiducial value of current ratio mutually and then export the detection of electrical leakage signal of the generation of expression electric leakage when big;
DC power supply, it is that direct voltage and the rectification circuit that supplies to described electric-leakage detection circuit constitute by the AC voltage conversion with AC power; With
Test circuit, it comprises the Test Switchboard of closing and supply with measuring current when only the test coil on being arranged at described zero phase current transformer carries out motion test, and this earth detector is characterised in that:
One end of the test coil of the zero phase current transformer in the described test circuit is connected with an ac input end of described rectification circuit by described Test Switchboard, and another terminal that does not connect Test Switchboard of described test coil becomes anode by polarity and is connected with another ac input end of described rectification circuit towards the diode of test coil end.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007081786A JP4935455B2 (en) | 2007-03-27 | 2007-03-27 | Earth leakage detector |
| JP2007-081786 | 2007-03-27 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101276713A true CN101276713A (en) | 2008-10-01 |
| CN101276713B CN101276713B (en) | 2012-04-25 |
Family
ID=39760636
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100885353A Expired - Fee Related CN101276713B (en) | 2007-03-27 | 2008-03-27 | Earth leakage detection apparatus |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP4935455B2 (en) |
| KR (1) | KR20080087654A (en) |
| CN (1) | CN101276713B (en) |
| FR (1) | FR2914428B1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103168245A (en) * | 2010-06-07 | 2013-06-19 | Amp控制股份有限公司 | Method for detection of leakage or fault currents from equipment in an electrical power system |
| CN103295852A (en) * | 2012-02-29 | 2013-09-11 | 三菱电机株式会社 | Electric leakage breaker |
| CN103430036A (en) * | 2011-03-23 | 2013-12-04 | 松下电器产业株式会社 | Earth leakage detection device |
| CN105830301A (en) * | 2013-12-18 | 2016-08-03 | 泽尼西文有限公司 | Digital current leakage breaker |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4874371B2 (en) * | 2009-07-22 | 2012-02-15 | 中国電力株式会社 | Fault current detection circuit |
| CN103647252B (en) * | 2013-12-05 | 2016-03-16 | 江苏国星电器有限公司 | There is the leakage switch of FSK communication function |
| JP6237533B2 (en) * | 2014-08-22 | 2017-11-29 | 三菱電機株式会社 | Earth leakage breaker |
| FR3059783B1 (en) * | 2016-12-07 | 2019-01-25 | Hager-Electro Sas | METHOD FOR MANUFACTURING A MEASUREMENT SENSOR FOR A CIRCUIT BREAKER |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2531294B2 (en) * | 1990-05-31 | 1996-09-04 | 松下電工株式会社 | Leakage detector |
| JP2004015961A (en) * | 2002-06-10 | 2004-01-15 | Kawamura Electric Inc | Ground fault interrupter with three-phase phase-failure protector |
| JP4264817B2 (en) * | 2003-11-27 | 2009-05-20 | 富士電機機器制御株式会社 | Earth leakage breaker |
| JP4395009B2 (en) * | 2004-05-28 | 2010-01-06 | 三菱電機株式会社 | Earth leakage breaker |
| JP4623560B2 (en) * | 2004-09-30 | 2011-02-02 | 河村電器産業株式会社 | Earth leakage breaker |
-
2007
- 2007-03-27 JP JP2007081786A patent/JP4935455B2/en active Active
-
2008
- 2008-02-15 KR KR1020080013774A patent/KR20080087654A/en not_active Application Discontinuation
- 2008-02-20 FR FR0800911A patent/FR2914428B1/en not_active Expired - Fee Related
- 2008-03-27 CN CN2008100885353A patent/CN101276713B/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103168245A (en) * | 2010-06-07 | 2013-06-19 | Amp控制股份有限公司 | Method for detection of leakage or fault currents from equipment in an electrical power system |
| CN103168245B (en) * | 2010-06-07 | 2016-08-24 | Amp控制股份有限公司 | For detecting leakage or the method for fault current of equipment in power system |
| CN103430036A (en) * | 2011-03-23 | 2013-12-04 | 松下电器产业株式会社 | Earth leakage detection device |
| CN103430036B (en) * | 2011-03-23 | 2016-03-30 | 松下知识产权经营株式会社 | Earth detector |
| CN103295852A (en) * | 2012-02-29 | 2013-09-11 | 三菱电机株式会社 | Electric leakage breaker |
| CN103295852B (en) * | 2012-02-29 | 2015-08-12 | 三菱电机株式会社 | Residual current circuit breaker |
| CN105830301A (en) * | 2013-12-18 | 2016-08-03 | 泽尼西文有限公司 | Digital current leakage breaker |
| CN105830301B (en) * | 2013-12-18 | 2018-09-14 | 泽尼西文有限公司 | Digital leakage circuit breakers |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101276713B (en) | 2012-04-25 |
| JP2008243564A (en) | 2008-10-09 |
| FR2914428A1 (en) | 2008-10-03 |
| FR2914428B1 (en) | 2012-12-14 |
| JP4935455B2 (en) | 2012-05-23 |
| KR20080087654A (en) | 2008-10-01 |
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