CN1855341B - Leakage circuit cutout - Google Patents
Leakage circuit cutout Download PDFInfo
- Publication number
- CN1855341B CN1855341B CN2006100739964A CN200610073996A CN1855341B CN 1855341 B CN1855341 B CN 1855341B CN 2006100739964 A CN2006100739964 A CN 2006100739964A CN 200610073996 A CN200610073996 A CN 200610073996A CN 1855341 B CN1855341 B CN 1855341B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/04—Means for indicating condition of the switching device
-
- 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
- H02H3/33—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 using summation current transformers
- H02H3/334—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 using summation current transformers with means to produce an artificial unbalance for other protection or monitoring reasons or remote control
- H02H3/335—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 using summation current transformers with means to produce an artificial unbalance for other protection or monitoring reasons or remote control the main function being self testing of the device
-
- 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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
- Breakers (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The invention discloses a leakage circuit cutout, which is characterized by the following: the oscillating circuit 7c is set based on AC power frequency to analog leakage current, which detects circuit 7 through starting-to-closing operating switch 7b in the zero-phase transformer 3.
Description
Technical field
The electric leakage that takes place in the distribution system that the present invention relates to be connected by detection electro-motor or other type load, prevent leakage circuit cutout in advance, and particularly relate to the improvement of the leakage circuit cutout that is added with test circuit by accident due to the electric leakage expansion.
Background technology
Usually, in order accurately to carry out the electric leakage operational testing of leakage circuit cutout, the various test circuits that append on the leakage circuit cutout have been made.Fig. 3 shows an example of this cutout.Fig. 3 shows the simplification configuration of the conventional leakage circuit cutout described in patent documentation 1.
In Fig. 3, the circuit of label 1 expression three-phase alternating current, the switch of label 2 expression conductings and disconnection alternating current circuit 1, label 3 expression Zero-phase current transformers, as primary coil, with the leakage current in the detection alternating current circuit 1, and label 6 is represented failure discriminating circuits with alternating current circuit 1 for it, it distinguishes from the detection electric current of the leakage current magnetic test coil 3a output of Zero-phase current transformer 3 whether electric leakage is arranged, and is configured to export the signal that shows electric leakage when electric leakage exists when detecting.The tripping operation device that label 4 expressions are operated by the output signal of electric leakage discriminator circuit 6 makes switch 2 unshowned switching construction tripping operations, opens contact, and alternating current circuit 1 is interrupted.The quarter-phase circuit of three-phase alternating current circuit 1 is powered to electric leakage discriminator circuit 6.The test circuit that the leakage tripping test is carried out in label 7 expressions and whether validation switch 2, Zero-phase current transformer 3, tripping operation device 4 and electric leakage discriminator circuit 6 carry out normal running.Test circuit 7 is equipped with the resistor 7a that test coil 3t that adjusting is fed to Zero-phase current transformer 3 from two phase lines of alternating current circuit 1 goes up the measuring current size, and the push button Test Switchboard 7b of conducting and disconnection measuring current.Label 8 expressions are connected to alternating current circuit 1 alternating-current power supply, and label 9 expressions are connected to the load of alternating current circuit 1.
In the leakage circuit cutout that disposes in this mode, when occurring an electric leakage and a leakage circuit in the load etc. and flow in the alternating current circuit 1, this leakage current is by there being zero circuitry phase transformer 3 to detect, and is input to the discriminator circuit 6 that leaks electricity from magnetic test coil 3a.If the leakage current that is detected has surpassed default differentiation standard, electric leakage discriminator circuit 6 produces an output signal that shows that electric leakage occurs, and this output signal is sent to tripping operation device 4.Tripping operation device 4 makes the construction of switch tripping operation of its connection immediately, and the switching contact of cut-off switch is interrupted alternating current circuit 1, and protection load 9 etc. exempts from the evil of electric leakage.
Test Switchboard 7b by continuity test circuit 7 also offers the test coil 3t that places Zero-phase current transformer 3 via resistor 7a with the simulation leakage current of pre-sizing, carries out the electric leakage interrupt operation test of leakage current circuit breaker.Therefore, obtained and detection identical when from the leakage current magnetic test coil 3a of Zero-phase current transformer 3, detecting leakage current output, and electric leakage discriminator circuit 6 is distinguished this detection output and output shows the signal that electric leakage takes place.Tripping operation device 4 is activated by this signal, and makes switch 2 tripping operations and interruption.Adopt this test, just can verify whether Zero-phase current transformer 3, electric leakage discriminator circuit 6 and tripping operation device 4 are operated normally.
(patent documentation 1) JP-A-2003-45312
Summary of the invention
The problem that solves
In this routine leakage circuit cutout, from the two-phase circuit of AC current, obtain the simulation leakage current of leakage tests.Therefore, a problem can appear: if be connected to the test circuit that produces the simulation leakage current mutually in have one to be to hold phase mutually, just can not carry out leakage tests.
Simultaneously, when the electric leakage discriminator circuit is not operated, promptly when occur being equal to or less than the small leakage current of differentiation standard in the alternating current circuit, leakage current and the frequency of simulating leakage current are complementary each other.Therefore, also have a problem: if two is anti-phase and coupling mutually, then leakage current is offset by the leakage current of reality and size has dropped to below the judging standard, thereby can not carry out leakage tests.
The objective of the invention is to obtain a highly reliable leakage circuit cutout, even if phase or small leakage current occur out in the alternating current circuit, it still can address these problems and carry out reliably leakage tests.
The means of dealing with problems
In order to solve the above problems, a kind of leakage circuit cutout provided by the invention comprises: the switch of conducting/disconnection many phase alternating current circuit; In the many phase alternating current circuit, detect the Zero-phase current transformer of leakage current; The electric leakage discriminator circuit whether differentiation has electric leakage to occur in the output current of the detection of electrical leakage coil of Zero-phase current transformer; With the tripping operation device that shows that output signal that the electric leakage discriminator circuit that electric leakage occurs being arranged makes switch trip and disconnection; Make the power circuit of many phase alternating current circuit to the power supply of electric leakage discriminator circuit, test circuit is configured to the simulation leakage current is supplied to the Zero-phase current transformer, wherein, power circuit has the circuit power of all phases that come from the many phase alternating current circuit, and test circuit is configured to power circuit as power supply producing the oscillating circuit of simulation leakage current, and operation makes the simulation leakage current be fed to the Test Switchboard of the cut-off/close of the circuit the Zero-phase current transformer from oscillating circuit.
In this invention, the oscillating circuit of test circuit preferably is arranged to the frequency of oscillation outside the mains frequency (50 or 60Hz).
Simultaneously, in the present invention, the number of turn of the coil of Zero-phase current transformer preferably is arranged to be equal to or greater than two circles.
In this invention because the power circuit of electric leakage discriminator circuit power supply is connected to all phases of the many phase alternating current circuit that obtains electric energy, even if the many phase alternating current circuit one be out phase mutually, still can carry out leakage tests.Simultaneously, have the simulation leakage current different owing to adopt the oscillating circuit of test circuit to form with the frequency of alternating current circuit, even if leakage current is not differentiated to there being electric leakage to produce, still can be carried out leakage tests reliably, and can not be subjected to the influence of leakage current.
Description of drawings
(Fig. 1) illustrates the block diagram of leakage circuit cutout of the present invention;
(Fig. 2) is shown specifically the power circuit of leakage circuit cutout of the present invention and the circuit diagram of test circuit; And
(Fig. 3) illustrates the block diagram of conventional leakage circuit cutout.
Label declaration
10 leakage circuit cutouts
1 alternating current circuit
The 1A power connector end
1B load link
2 switches
3 Zero-phase current transformers
3a leakage current magnetic test coil
The 3t test coil
4 tripping operation devices
5 power circuits
51 three-phase full wave rectifier circuits
52 constant voltage circuits
6 electric leakage discriminator circuits
7 test circuits
The 7a regulating resistor
The 7b Test Switchboard
The 7c oscillating circuit
Specific embodiment
The present invention to the embodiment shown in the relevant figure is described.
Embodiment
Fig. 1 is the block diagram that the embodiment of the invention is shown.
In Fig. 1, label 10 expression leakage circuit cutouts.Usually, all these element form thick and fast, and are contained in the moulded cartridge body of being made by insulating resin.Leakage circuit cutout 10 comprises: the alternating current circuit 1 that connects the three-phase of power connector end 1A and load link 1B; Lead the switch 2 of cut-off/close alternating current circuit 1; Wherein the conductor of all phases by alternating current circuit 1 is arranged, and detect the Zero-phase current transformer 3 that flow into the leakage current in the alternating current circuit 1; The detection electric current of leakage current magnetic test coil 3a by monitoring Zero-phase current transformer 3 is distinguished the electric leakage discriminator circuit 6 that whether has leakage current to occur; And with showing that the output signal that the electric leakage discriminator circuit 6 that electric leakage occurs being arranged makes the switching construction tripping operation of switch 2 and the tripping operation device 4 that alternating current circuit 1 is interrupted.This leakage circuit cutout 10 also comprises and is used for the leakage tests circuit 7 whether validation switch 2, Zero-phase current transformer 3, tripping operation device 4 and electric leakage discriminator circuit 6 carry out normal running, and to the power circuit 5 of electric leakage discriminator circuit 6 and test circuit 7 power supplies.The output of test circuit 7 is by way of the test coil 3 that places Zero-phase current transformer 3 and electromagnetic type is connected to Zero-phase current transformer 3.In addition, alternating-current power supply 8 is connected to power connector end 1A, and load 9 is connected to load end 1B.
Details as shown in Figure 2, power circuit 5 is configured to three-phase full wave rectifier circuit 51, and it carries out rectification to the alternating-current power supply that three-phase provided that comes from alternating current circuit 1, and converts thereof into DC power supply; Also have constant-voltage circuit 52, it is controlled at predetermined voltage with the output voltage of rectification circuit 51.Power circuit 5 as power supply is added to electric leakage discriminator circuit 6 and test circuit 7.
The push button Test Switchboard 7b that operates when test circuit 7 is included in leakage tests, the oscillating circuit 7 of the oscillating current of generation preset frequency and the regulating resistor 7a that regulates measuring current.The Test Switchboard 7b of test circuit 7, oscillating circuit 7c and regulating resistor 7a are connected in series to power circuit 5 by the test coil 3t of Zero-phase current transformer 3.
Oscillating circuit 7c is by NAND gate pole Q1, NOT gate pole Q2 and Q3, and resistor R 1 and R2, and capacitor C1 configuration forms.Oscillating circuit 7c is configured to when Test Switchboard 7b switches to conducting, the Q1 of NAND gate pole output becoming L level, and the frequency f that following expression formula was similar to out the vibration to be made by the value of capacitor C1 and resistor R 1.
f＝1/(2.2·R1·C1)(Hz)
Because being fed to the size of measuring current It of the test coil 3t of Zero-phase current transformer 3 from oscillating circuit 7c is determined by the output voltage V 1 of resistor 7a and power supply 5, then the size by regulating resistor 7a can it be set to predetermined value.
In test circuit 7, when Test Switchboard 7b switched to conducting, oscillating circuit 7c vibrated, and was provided for the test coil 3t of Zero-phase current transformer 3 with the presumptive test electric current (simulation leakage current) of frequency f vibration.Therefore, from the leakage current magnetic test coil 3a of Zero-phase current transformer 3, obtain detection electric current, and it is added on the electric leakage discriminator circuit 6 corresponding to measuring current It.Because it is accurate that the size of selected measuring current It surpasses default calibration really, the discriminator circuit 6 that then leaks electricity will show that immediately the signal that has electric leakage to occur sends to tripping operation device 4.Therefore, if operate normally, then switch 2 unshowned tripping operation structure tripping operations, the switching contact of switch 2 disconnects, and alternating current circuit 1 is interrupted.Therefore, can normally carry out by verification operation, and EOT.
In this mode, in leakage circuit cutout of the present invention, three-phase full wave rectifier circuit 51 places power circuit 5, and the voltage of all phases of three-phase alternating current circuit 1 all carries out rectification by rectification circuit 51, and has obtained direct voltage.Therefore, even if the Xiang Youyi of three-phase alternating current circuit 1 is out phase mutually, still can obtain direct voltage.In addition, because the output voltage of power circuit 5 is maintained the constant of V1 by constant-voltage circuit 52, even if change, still predetermined measuring current can be offered the test coil 3t of Zero-phase current transformer 3 owing to opening the input voltage that causes power circuit 5 mutually.Therefore, open phase, still can carry out leakage tests even if in alternating current circuit 1, occur one.
In the time will carrying out leakage tests, in leakage circuit cutout, can occur not reaching electric leakage discriminator circuit 6 and calibrate accurate leakage current really, such situation can be imagined.In this case, if the frequency of the measuring current (simulation leakage current) that is generated by test circuit 7 and the leakage current of reality are identical, and its phase place is opposite and coupling, even if then leakage circuit cutout is normal, the final test electric current is offset by leakage current, showing having the signal that electric leakage occurs can output from electric leakage discriminator circuit 6, and result that should test is the operability fault.
Therefore, in the present invention, because the frequency of commercial power power-supply system is 50 or 60Hz, then the frequency of oscillation f of the oscillating circuit 7c of test circuit 7 can be made as 40 or the 70Hz different with 50 or 60Hz.When the frequency of oscillation f with this mode oscillating circuit 7c was set to be different from mains frequency, when leakage tests carried out, measuring current (simulation leakage current) can not offset by the small leakage current in the reality.Therefore, can accurately carry out this test, and the reliability of leakage tests can improve also.
Simultaneously, faradic about 70% because the electric leakage judging standard of leakage circuit cutout is arranged on electric leakage, when induced current was made as 30mA, the drain region branch standard of electric leakage discriminator circuit 6 was arranged on about 21mA.Therefore, when the test coil 3t of Zero-phase current transformer 3 had a circle, the measuring current (simulation leakage current) that just needs will come from the test circuit 7 was made as 21mA at least.Can occur such as the problem by the heating due to the load current because bear the power circuit 5 of this electric current, then source current is low more good more.Owing to this reason, in the present invention, when admissible deviation (leeway) occurring in the coil space of Zero-phase current transformer 3, test coil 3t has a plurality of (n) circle that is equal to or greater than two circles.Therefore, because the 1/n of required electric current when offering the measuring current It of test coil and can taper to a circle, the output current of power circuit 5 can be kept very low, and the power consumption of power circuit 5 can reduce.
Claims (3)
1. leakage circuit cutout comprises:
The switch of cut-off/close many phase alternating current circuit;
Detect the Zero-phase current transformer of the leakage current of described many phase alternating current circuit;
In the output current of the leakage current magnetic test coil of described Zero-phase current transformer, detect the electric leakage discriminator circuit that whether has electric leakage to occur;
With showing that the output signal that the described electric leakage discriminator circuit that electric leakage occurs being arranged makes described switch trip and the tripping operation device that disconnects;
The power circuit that described many phase alternating current circuit is powered to described electric leakage discriminator circuit; And
Be configured to the simulation leakage current is offered the test circuit of the test coil of described Zero-phase current transformer,
Wherein
Described power circuit possesses the electric energy of the circuit that all phases that come from described many phase alternating current circuit are arranged, and
Described test circuit comprises: described power circuit is used as the oscillating circuit of power supply with generation simulation leakage current, and the circuit that described simulation leakage current is provided to from described oscillating circuit in the described Zero-phase current transformer is carried out the Test Switchboard that cut-off/close is operated.
2. leakage circuit cutout as claimed in claim 1 is characterized in that the oscillating circuit of described test circuit is set to the frequency of oscillation outside mains frequency 50 or the 60Hz.
3. leakage circuit cutout as claimed in claim 1 or 2 is characterized in that the number of turn of the test coil of described Zero-phase current transformer is equal to or greater than two circles.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005121052 | 2005-04-19 | ||
| JP2005121052A JP4742232B2 (en) | 2005-04-19 | 2005-04-19 | Earth leakage breaker |
| JP2005-121052 | 2005-04-19 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1855341A CN1855341A (en) | 2006-11-01 |
| CN1855341B true CN1855341B (en) | 2010-10-06 |
Family
ID=37057433
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006100739964A Active CN1855341B (en) | 2005-04-19 | 2006-04-18 | Leakage circuit cutout |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JP4742232B2 (en) |
| KR (1) | KR100972274B1 (en) |
| CN (1) | CN1855341B (en) |
| FR (1) | FR2884644B1 (en) |
| TW (1) | TWI368371B (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4369417B2 (en) * | 2005-11-30 | 2009-11-18 | 三菱電機株式会社 | Earth leakage breaker |
| KR100803379B1 (en) * | 2007-05-23 | 2008-02-15 | 주식회사 대일프로텍 | Control and monitoring apparatus for street light cabinet panel |
| KR100902683B1 (en) | 2007-06-08 | 2009-06-15 | 주식회사 대륙 | Circuit breaker |
| KR100924726B1 (en) * | 2007-11-15 | 2009-11-04 | 주식회사 대륙 | Electric reverse connection circuit of electric leakage breaker |
| CN101888082B (en) * | 2010-07-09 | 2013-05-01 | 上海诺雅克电气有限公司 | Residual current protector |
| CN103026578B (en) * | 2010-07-30 | 2016-01-20 | 松下知识产权经营株式会社 | Electric driving force automobile battery-charging device and be applied to the electric leakage confirmation method of this electric driving force automobile battery-charging device |
| KR101326418B1 (en) | 2012-06-05 | 2013-11-11 | 엘에스산전 주식회사 | A test circuit for earth leakage breaker under phase fault |
| JP6137982B2 (en) * | 2013-08-01 | 2017-05-31 | 三菱電機株式会社 | Earth leakage breaker |
| CN103399236B (en) * | 2013-08-01 | 2015-12-02 | 德力西电气有限公司 | A kind of hookup of residual current protecting |
| KR101889535B1 (en) | 2016-09-21 | 2018-08-22 | 주식회사 이진스 | Earth Leakage Breaker |
| CN107332201A (en) * | 2017-08-23 | 2017-11-07 | 浙江夏兴电子科技股份有限公司 | One kind is applied to three-phase circuit simulated leakage current generating circuit |
| KR102485205B1 (en) * | 2018-01-30 | 2023-01-05 | 엘에스일렉트릭(주) | Electric leakage circuit breaker |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1665092A (en) * | 2004-03-01 | 2005-09-07 | 富士电机机器制御株式会社 | Disjoncteur de fuite a la terre |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR920008243Y1 (en) * | 1989-03-10 | 1992-11-14 | 시끼 모리야 | Circuit device having circuit breaking and current detecting functions |
| KR100277921B1 (en) | 1998-07-07 | 2001-01-15 | 이종수 | Earth leakage cutoff inspection device and method |
| IT1319714B1 (en) * | 2000-12-28 | 2003-11-03 | Abb Ricerca Spa | LOW VOLTAGE ELECTRONIC DIFFERENTIAL SWITCH WITH IMPROVED FUNCTIONALITY |
| JP4534373B2 (en) * | 2001-03-26 | 2010-09-01 | 三菱電機株式会社 | Circuit breaker with leakage current display unit |
| JP2004015961A (en) * | 2002-06-10 | 2004-01-15 | Kawamura Electric Inc | Ground fault interrupter with three-phase phase-failure protector |
| GB0226111D0 (en) * | 2002-11-08 | 2002-12-18 | Delta Electrical Ltd | Residual current devices |
| JP4253700B2 (en) * | 2002-12-16 | 2009-04-15 | 富士電機機器制御株式会社 | Earth leakage breaker |
| JP4264817B2 (en) * | 2003-11-27 | 2009-05-20 | 富士電機機器制御株式会社 | Earth leakage breaker |
-
2005
- 2005-04-19 JP JP2005121052A patent/JP4742232B2/en active Active
-
2006
- 2006-03-08 KR KR1020060021870A patent/KR100972274B1/en active IP Right Grant
- 2006-04-07 FR FR0603089A patent/FR2884644B1/en not_active Expired - Fee Related
- 2006-04-18 CN CN2006100739964A patent/CN1855341B/en active Active
- 2006-04-19 TW TW095113986A patent/TWI368371B/en active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1665092A (en) * | 2004-03-01 | 2005-09-07 | 富士电机机器制御株式会社 | Disjoncteur de fuite a la terre |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2003-45312A 2003.02.14 |
Also Published As
| Publication number | Publication date |
|---|---|
| TW200707875A (en) | 2007-02-16 |
| JP2006302601A (en) | 2006-11-02 |
| FR2884644B1 (en) | 2019-06-28 |
| FR2884644A1 (en) | 2006-10-20 |
| KR20060110749A (en) | 2006-10-25 |
| TWI368371B (en) | 2012-07-11 |
| CN1855341A (en) | 2006-11-01 |
| KR100972274B1 (en) | 2010-07-23 |
| JP4742232B2 (en) | 2011-08-10 |
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Effective date of registration: 20090327 Address after: Tokyo, Japan Applicant after: FUJI ELECTRIC FA COMPONENTS & SYSTEMS Co.,Ltd. Address before: Kawasaki Japan Applicant before: Fuji Electric Holdings Co.,Ltd. |
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