CN103384446A - Apparatus and method for arc fault detection - Google Patents
Apparatus and method for arc fault detection Download PDFInfo
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- CN103384446A CN103384446A CN2013101573627A CN201310157362A CN103384446A CN 103384446 A CN103384446 A CN 103384446A CN 2013101573627 A CN2013101573627 A CN 2013101573627A CN 201310157362 A CN201310157362 A CN 201310157362A CN 103384446 A CN103384446 A CN 103384446A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
- G01R15/18—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers
- G01R15/181—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers using coils without a magnetic core, e.g. Rogowski coils
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/0266—Marks, test patterns or identification means
- H05K1/0268—Marks, test patterns or identification means for electrical inspection or testing
-
- 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
- G01R31/005—Testing of electric installations on transport means
- G01R31/008—Testing of electric installations on transport means on air- or spacecraft, railway rolling stock or sea-going vessels
-
- 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
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/0213—Electrical arrangements not otherwise provided for
- H05K1/0263—High current adaptations, e.g. printed high current conductors or using auxiliary non-printed means; Fine and coarse circuit patterns on one circuit board
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/16—Printed circuits incorporating printed electric components, e.g. printed resistor, capacitor, inductor
- H05K1/165—Printed circuits incorporating printed electric components, e.g. printed resistor, capacitor, inductor incorporating printed inductors
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
- H05K2201/10007—Types of components
- H05K2201/10053—Switch
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
- H05K2201/10227—Other objects, e.g. metallic pieces
- H05K2201/10272—Busbars, i.e. thick metal bars mounted on the PCB as high-current conductors
Abstract
An apparatus and method for detecting an arc fault using a power conductor (14) on a printed circuit board (PCB) (10), which supplies power from an external power source to electrical components on the PCB (10), by sensing a value indicative of the rate of change of current passing through the power conductor (14). The apparatus and method may be used for detecting arc faults both internal and external to the PCB (10).
Description
The cross reference of related application
The application is according to 35 U.S.C. §
119Require the priority of the GB Patent Application No. 12075347 of submission on May 1st, 2012, its disclosure content is incorporated this paper by reference into.
Background technology
Can use higher voltage and can supply with high electric current as those the circuit that uses in the aircraft air line.Electric fault as arc fault wherein may occur, and typically makes flow through conducting medium or jump to another conductor from a conductor across non-conductive medium of electric current.It is important this type of arc fault can being detected, because if in time do not detect, fault may develop into the other problems in the equipment of short circuit, disabler and the service of these electronic circuits.
Summary of the invention
In one embodiment, printed circuit board (PCB) (PCB) comprises a plurality of electric assemblies, be configured to be coupled to the power supply source of PCB outside and power line (power conductor) and the arc fault detector of power are provided to a plurality of electric assemblies, this arc fault detector comprises the first air-core transformer, this first air-core transformer is positioned near power line with the first magnetic Field Coupling that electric current was produced by power line and output voltage V out is provided, and output voltage V out is proportional with the rate of change dI/dt of electric current by power line.
In another embodiment, the method of the arc fault in a kind of power line that detects on PCB, comprise by the air-core transformer sensing that is positioned on printed circuit board (PCB) and indicate the value of the rate of change of the electric current that passes through power line, and determine the arc fault situation based on the value of sensing.
According to an aspect, a kind of printed circuit board (PCB) (PCB) is provided, it comprises: a plurality of electric assemblies; Power line, it is configured to be coupled to the power supply source of described PCB outside and provides power to described a plurality of electric assemblies; And arc fault detector, this arc fault detector comprises the first air-core transformer, described the first air-core transformer is positioned near described power line with the magnetic Field Coupling that produces with electric current by described power line and output voltage V out is provided, and described output voltage V out is proportional with the rate of change dI/dt of described electric current by described power line.
Preferably, described arc fault detector also comprises signal processing circuit, and described signal processing circuit receives Vout and determines the existence of arc fault.Further, described PCB also comprise relay and SSPC at least one of them, described relay and SSPC one of them is coupled described power line and described power supply source solution when determining arc fault at least.
Preferably, described arc fault detector also comprises the second air-core transformer with respect to described the first air-core transformer series connection and anti-phase wiring, and the voltage that strides across described the first air-core transformer and the second air-core transformer two ends is Vout.Further, with described the first air-core transformer with near the second air-core transformer is placed in described power line so that long property ground increases positive component and the negative component in the described magnetic field that the described electric current by described power line produces mutually.Further, with described the first air-core transformer with the second anti-phase wiring of air-core transformer in order to realize the long property increase mutually of the described positive component in described magnetic field and negative component.Again further, described the first air-core transformer and the second air-core transformer comprise respectively the first coil and the second coil.Again further, each coil of described the first coil and the second coil is formed by the winding that is wound around by identical direction of rotation.
Still more preferably, each coil comprises at least one spiral.Again further preferably, each coil comprises a plurality of spirals of the different layers that is arranged in described PCB.
Still more preferably, described winding comprises the trace on described PCB.
Preferably, described the first air-core transformer comprises the first coil.Further, described the first coil is formed by the winding that is wound around by identical direction of rotation.Further, described coil comprises at least one spiral.Again further, described coil comprises a plurality of spirals of the different layers that is arranged in described PCB.Again further, described winding comprises the trace on described PCB.
Preferably, described power line comprises busbar.
According to another aspect, provide a kind of detection to use the method for the arc fault of the power line on printed circuit board (PCB) (PCB), the electric assembly supply power of described power line on from external power source to described PCB, described method comprises: by being positioned at the value of air-core transformer sensing indication by the rate of change of the electric current of described power line on described printed circuit board (PCB); And determine the arc fault situation based on the value of institute's sensing.
Preferably, described method comprises from least two described values of air-core transformer sensing, and described at least two air-core transformer are positioned near described power line positive component and the negative component that increases the magnetic field that the described electric current by power line produces with long property ground mutually.
Preferably, described method also comprises described power line and described external power source is disconnected.Further, described external power source at least 60 volts.Further, described external power source at least 220 volts.
Description of drawings
In these accompanying drawings:
Figure 1A and Figure 1B are the schematic illustration according to the PCB of the embodiment of the present invention.
Fig. 2 A is the schematic illustration of the demonstration coil that can use together with the PCB of Fig. 1.
The simplification equivalent schematic of Fig. 2 B pictorial image 2A is to allow the electromagnetic coupled parameter of assessment coil.
Fig. 3 is the schematic diagram according to the demonstration test circuit configuration of the embodiment of the present invention.
Fig. 4 A illustrates the curve chart of the electric current of advancing by series arc faults in circuit shown in Figure 3, and Fig. 4 B diagram is amplified the curve chart of the response of hollow coil output voltage.
Embodiment
Embodiments of the invention comprise the rate of change (dI/dt) that detects fast current with the hollow current transformer of PCB instantiation, and as non-limiting example, this can create in the aircraft distribution feeder during series and parallel connections arc fault event.In historical arc fault detection systems, the past is determined dI/dt with resistor-capacitor hardware differentiator from solid-state power controller (SSPC) output current measuring circuit.SSPC typically be designed to read they rated current approximately 600% could be in the expection environment practical function.Arc fault under high voltage produces approximately only 5% the current disturbing of this rated current.Therefore, the arc fault disturbance may be difficult to separate with the normal noise of circuit.SSPC often uses shunt resistor as the device of measuring by the electric current of its terminal, and these shunt resistors bases above scope arrange size, this means to define the signal to noise ratio that can be used for arc fault detection.Shunt resistor shows in low voltage application well, but along with voltage improves, loses the ability that the normal noise of arc fault disturbance and circuit is distinguished.Can this difficult problem be described in conjunction with particular example.
In high-voltage system, because causing the variation in output current, reduces according to following formula series arc faults:
In modern environment, typical arc fault event will cause 20 vor signals.In 28 volts of DC systems, the current reduction during 20 volts of series arc faults events obtains following relation: deltaI/ILOAD=20/28=0.714=71.4%.But in 270 volts of DC systems, the current reduction during similar 20 volts of series arc faults events obtains following relation: deltaI/ILOAD=20/270=.074=7.4%.In exemplary currents surveillance in SSPC, measuring range typically covers 0% to 600% of rated current.The Several Typical Load that is applied to SSPC with rated value be reduced to load current value 75% near, therefore, suppose that the curent change that causes due to series arc faults under the line voltage of 270 volts of DC is 7.4% of 75% load current, and be only only 5.6% current value of 600% full journey scope.By contrast, in 28 volts of DC systems, the load current that reduces rated value is 53.6%, and is almost large 10 times.5.6% current value proportional to 600% scope is only 0.93% of 600% full journey scope, by contrast, is 8.9% for 28 volts of systems.The precision of the interior circuit monitors of 0.93% curent change due to this series arc faults and SSPC system is in same order.The variation of 28 volts of systems is higher on value.Therefore, although the arc fault event in 28 volts of DC systems easily utilizes shunt resistor to determine, so same for the arc fault event in 270 volts of DC systems.
Realize that the required information of arc fault detection is merely the AC content to the DC signal that power is provided to fixed load.Therefore, the DC content of signal can be ignored, and the AC coupling feature of transformer can be used.Because the DC current level in this system is high, so due to saturated former of magnetic core thereby can't use the typical case based on the current transformer of iron core.The hollow current transformer of PCB instantiation can be unsaturated, and therefore by ignoring any DC current component and directly providing dI/dt to solve this problem.
The invention provides the solution for the arc fault event of determining high voltage environment.Illustrate one embodiment of the present of invention in Figure 1A in PCB 10 applied environments, PCB 10 can comprise and have a plurality of electric assemblies plate 12, power line 14 and the arc fault detector 16 of (for the sake of simplicity and not shown).Plate 12 can be formed by any suitable material as base material or laminated sheet, and it is generally athermanous.Multiple parts for example comprise memory, microprocessor 11 and other electric assembly 13(, resistor, diode and capacitor), they can be installed to plate 12.
The first air-core transformer and the second air- core transformer 20 and 22 can be placed in power line 14 neighbouring in order to increase to long property mutually positive component and the negative component in the magnetic field of the electric current generation of passing through power line 14.Each of the first air-core transformer and the second air- core transformer 20 and 22 can comprise the coil of instantiation on plate.As what can more clearly see in Figure 1B, the first air-core transformer 20 is illustrated as the first coil that comprises that winding 24 forms, and the second air-core transformer 22 is illustrated as the second coil of winding 26 formation that comprise that direction of rotation identical with winding 24 is wound around.Can adopt this mode with the first air-core transformer with the second air-core transformer 20 with 22 anti-phase wirings in order to realize during operation the long property increase mutually of the positive component in magnetic field and negative component.
Winding 24 and winding 26 be illustrated as comprise spiral form on plate 12 trace, illustrate better in Fig. 2 A.These windings form the rectangular coil that reduces gradually can be equivalent to rectangles similar on a plurality of geometries and that size is different, as shown in the coil 30 in Fig. 2 B.Also can imagine each coil and can comprise a plurality of spirals on different layers in the plate 12 that is arranged in PCB 10.Note, for brevity, only illustrate a coil in above-described accompanying drawing.A plurality of spirals on a plurality of layers of opening 32 diagram PCB 10 are Series Wiring wherein.
In operation, can detect arc fault in power line 14 by arc fault detector 16.By the generation of arc fault detector 16 sensing arc faults, arc fault detector 16 is preferably as rate of change or the dI/dt of the electric current I in the function measurement power line 14 of time t.Operating period, the magnetic field (as shown in arrow B in Figure 1A) that air-core transformer can produce with the electric current (as shown in arrow 28) by power line 14 is coupled and output voltage V out is provided, and output voltage V out is proportional with the rate of change dI/dt of the electric current that passes through power line 14.In illustrated embodiment, the voltage at the first air-core transformer and the second air- core transformer 20 and 22 two ends can be Vout.Arc fault detector 16 can receive Vout and can determine accordingly the existence of arc fault.More specifically, arc fault detector 16 can be indicated the value of the rate of change of the electric current that passes through power line 14 by sensing, and determines the arc fault situation based on the value of sensing.Can whether surpass the maximum rate of change value that allows based on the value of sensing and carry out the detection of arc fault.To understand, this determine easily to change to by ack/nack relatively or very/vacation relatively come to satisfy.For example, can use by with numerically inverse transformation of data the time and satisfy less than threshold value greater than testing easily.Can be by testing to determine the maximum rate of change value of permission.
In order to determine arc fault, arc fault detector 16 sensings from the first air-core transformer and the second air-core transformer 20 with 22 value so that long property ground increases positive component and the negative component in the magnetic field that the electric current by power line 14 produces mutually.Under the parameter of given indication, the transforming function transformation function of can deriving between busbar current differential dI/dt and coil output voltage Vout.Can use following formula to calculate coil voltage:
The voltage at two of Vout=Series Wiring coil two ends wherein;
KThe quantity of=coil;
N=the number of turn;
a=from the center of busbar to the distance of coil edge;
wThe width of=coil;
lThe length of=coil; And
sSpacing in=each coil between circle.
For five circle example embodiment of twin coil shown in Figure 1A and Figure 1B, can be by following formula to this evaluation of connecting:
This voltage signal indicator current is rate over time, and in this way, arc fault detector 16 can determine whether rate of change surpasses the maximum rate of change that allows.
Each coil turn is more, and the layer that each coil uses is more, and the coupling between dI/dt and coil output voltage Vout is larger.Relation between loop length and output voltage is linear, but Vout is more proportional than the relation of the ratio of the relation of coil width and ln (b/a), so need
wOr
bIn (Figure 1B) larger increase be coupled in any significant increase, therefore expectation increases loop length to maximum (if possible).
Fig. 3 diagram is according to the demonstration test configurations circuit 100 with Vout output of the embodiment of the present invention.In test configurations circuit 100, tested being of a size of
l=38mm,
w=5mm,
a=10mm, therefore
bThe dual-hollow coil of=15mm.Under the random vibration according to SAE AS5692 standard, comprise loosening the end on the vibration machine that configures and produce series arc faults.Under 270 volts of DC line voltages, carry out this test.Electric current by series arc faults in circuit 100 shown in Figure 3 when when curve chart in Fig. 4 A diagram is energized, loosening end rocks.The response of the hollow coil output voltage that curve chart in Fig. 4 B diagram is amplified, it illustrates the negative pulse during the negative dI/dt event that puncturing of series arc faults cause.During arc fault, the amplitude of pulse is exaggerated 10 times.
Above-described embodiment provides multiple advantage, comprises series connection and/or the arc fault in parallel that can detect in AC and DC system, and is particularly useful for the series arc faults that detects in high-voltage system.Above-described embodiment can be for detection of the inside and outside arc fault of PCB.The hollow current transformer provides the device of determining dI/dt signal in distribution feeder, and need not to measure absolute current and can be in the follow-up expense that has this signal differentiation.Embodiment above also provides the dI/dt dynamic range of improving than with the absolute current signal differentiation.Above-described embodiment also provides the electric current isolation of current measurement system, allows like this have flexibility in required any signal processing circuit.In high-voltage system, the current sense amplifier of the transducer that uses need not to float on on-Line Voltage as necessary for high-end shunt current transducer.Above-described embodiment can detect the AC component of high magnitude DC electric current in undersaturated situation, and the good inhibition of the far field interference source of seeing in the antagonism aircraft environment is provided.This solution only needs considerably less peripheral assembly, and compares with alternative solution and realize that cost is lower.
This written description usage example openly comprises the present invention of optimal mode, and also makes those skilled in the art can put into practice the present invention, comprises making and using any device or system and carry out the method for any combination.The patentable scope of the present invention is defined by claim, and can comprise other example that those skilled in the art expect.If this type of other example have with the claim literal language invariably with structural element, if perhaps they comprise that from the claim literal language without the different equivalent structure key element of essence, they are defined as within the scope of claim.
Components list
10?PCB
11 microprocessors
12 plates
13 electric assemblies
14 power lines
16 arc fault detectors
20 first air-core transformer
21 arc fault detection circuit
22 second air-core transformer
24 windings
26 windings
28 arrows
30 coils
32 openings
100 configuration circuits.
Claims (10)
1. a printed circuit board (PCB) (PCB), it comprises:
A plurality of electric assemblies;
Power line, it is configured to be coupled to the power supply source of described PCB outside and provides power to described a plurality of electric assemblies; And
Arc fault detector, it comprises the first air-core transformer, described the first air-core transformer is positioned near described power line with the magnetic Field Coupling that produces with electric current by described power line and output voltage V out is provided, and described output voltage V out is proportional with the rate of change dI/dt of described electric current by described power line.
2. PCB as claimed in claim 1, wherein said arc fault detector also comprises signal processing circuit, described signal processing circuit receives Vout and determines the existence of arc fault.
3. PCB as claimed in claim 2, also comprise relay and SSPC at least one of them, described relay and SSPC one of them is coupled described power line and described power supply source solution when determining arc fault at least.
4. PCB as claimed in claim 1, wherein said arc fault detector also comprises the second air-core transformer with respect to described the first air-core transformer series connection and anti-phase wiring, and the voltage that strides across described the first air-core transformer and the second air-core transformer two ends is Vout.
5. PCB as claimed in claim 4, wherein be placed in described the first air-core transformer and the second air-core transformer described power line neighbouring in order to increase to long property mutually positive component and the negative component in the described magnetic field of the described electric current generation of passing through described power line.
6. PCB as claimed in claim 5, wherein with described the first air-core transformer with the second anti-phase wiring of air-core transformer in order to realize the long property increase mutually of described positive component and the negative component in described magnetic field.
7. PCB as claimed in claim 6, wherein said the first air-core transformer and the second air-core transformer comprise respectively the first coil and the second coil.
8. PCB as claimed in claim 7, each coil of wherein said the first coil and the second coil is formed by the winding that is wound around by identical direction of rotation.
9. PCB as claimed in claim 8, wherein each coil comprises at least one spiral.
10. PCB as claimed in claim 9, wherein each coil comprises a plurality of spirals of the different layers that is arranged in described PCB.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1207534.7 | 2012-05-01 | ||
| GB1207534.7A GB2501693B (en) | 2012-05-01 | 2012-05-01 | Apparatus and method for arc fault detection |
| US13/596617 | 2012-08-28 | ||
| US13/596,617 US8842398B2 (en) | 2012-05-01 | 2012-08-28 | Apparatus and method for arc fault detection |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103384446A true CN103384446A (en) | 2013-11-06 |
| CN103384446B CN103384446B (en) | 2018-03-06 |
Family
ID=49384560
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310157362.7A Active CN103384446B (en) | 2012-05-01 | 2013-05-02 | Apparatus and method for arc fault detection |
Country Status (4)
| Country | Link |
|---|---|
| CN (1) | CN103384446B (en) |
| CA (1) | CA2813933A1 (en) |
| DE (1) | DE102013104286A1 (en) |
| FR (1) | FR2990322B1 (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105094116A (en) * | 2015-07-01 | 2015-11-25 | 西北工业大学 | AC solid state power controller rapid arc fault detection data pre-processing method |
| CN106950476A (en) * | 2017-03-31 | 2017-07-14 | 北京腾锐视讯科技有限公司 | A kind of fault electric arc detection sensor of some face installation parallel with detected wire |
| CN107045110A (en) * | 2017-03-16 | 2017-08-15 | 北京腾锐视讯科技有限公司 | Place dipteron change rate of electromagnetic fields detection coil and detection sensor in side |
| CN107209218A (en) * | 2015-02-11 | 2017-09-26 | 脉冲电子股份有限公司 | Electric Arc fault current sensor and system |
| US9970962B2 (en) | 2014-09-16 | 2018-05-15 | Industrial Technology Research Institute | Non-contact type voltage sensor for dual-wire power cable and method for compensating installation position variation thereof |
| CN108983041A (en) * | 2017-06-02 | 2018-12-11 | 通用电气航空系统有限公司 | Equipment for detecting failure in electric wire |
| CN110770991A (en) * | 2017-05-23 | 2020-02-07 | 帕西·西姆公司 | Arc fault circuit interrupter |
| CN111796135A (en) * | 2019-04-02 | 2020-10-20 | 埃贝斯佩歇控制兰道有限责任两合公司 | Current measuring assembly |
| CN111880055A (en) * | 2020-07-09 | 2020-11-03 | 上海联影医疗科技有限公司 | Sparking detection apparatus and method |
| CN113176479A (en) * | 2021-04-27 | 2021-07-27 | 山东科汇电力自动化股份有限公司 | Series arc detection method for low-voltage distribution network |
| CN111880055B (en) * | 2020-07-09 | 2024-04-16 | 上海联影医疗科技股份有限公司 | Spark detection device and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA3107058A1 (en) | 2018-07-25 | 2020-01-30 | Hubbell Incorporated | Circuit interrupting device having printed circuit board coils |
| DE102019132963B4 (en) * | 2019-12-04 | 2021-08-26 | Hanon Systems | Current measurement arrangement |
| CN113484363B (en) * | 2021-06-29 | 2023-05-23 | 重庆长安新能源汽车科技有限公司 | Test device and method for simulating internal heating of controller |
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- 2013-04-23 FR FR1353679A patent/FR2990322B1/en active Active
- 2013-04-25 CA CA2813933A patent/CA2813933A1/en not_active Abandoned
- 2013-04-26 DE DE102013104286A patent/DE102013104286A1/en not_active Withdrawn
- 2013-05-02 CN CN201310157362.7A patent/CN103384446B/en active Active
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| CN1106957A (en) * | 1993-09-15 | 1995-08-16 | 尹顿公司 | Self-testing circuit breaker ground fault and sputtering arc trip unit |
| US5818671A (en) * | 1996-10-04 | 1998-10-06 | General Electric Company | Circuit breaker with arcing fault detection module |
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Also Published As
| Publication number | Publication date |
|---|---|
| CA2813933A1 (en) | 2013-11-01 |
| DE102013104286A1 (en) | 2013-11-07 |
| FR2990322A1 (en) | 2013-11-08 |
| FR2990322B1 (en) | 2016-09-09 |
| CN103384446B (en) | 2018-03-06 |
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