CN103683182A - Circuit arrangement used for electric protective device - Google Patents
Circuit arrangement used for electric protective device Download PDFInfo
- Publication number
- CN103683182A CN103683182A CN201310384177.1A CN201310384177A CN103683182A CN 103683182 A CN103683182 A CN 103683182A CN 201310384177 A CN201310384177 A CN 201310384177A CN 103683182 A CN103683182 A CN 103683182A
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- China
- Prior art keywords
- control device
- switching device
- voltage
- triggering signal
- trig
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
- H01H47/22—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for supplying energising current for relay coil
-
- 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
- H02H3/02—Details
- H02H3/021—Details concerning the disconnection itself, e.g. at a particular instant, particularly at zero value of current, disconnection in a predetermined order
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0007—Details of emergency protective circuit arrangements concerning the detecting means
- H02H1/0015—Using arc detectors
-
- 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
Landscapes
- Emergency Protection Circuit Devices (AREA)
- Relay Circuits (AREA)
- Breakers (AREA)
Abstract
A circuit arrangement 10 for an electric protective device comprises a first electric line 12, an electromagnetic isolating device 16, a switching device T1 and a control device 18. The electromagnetic isolating device is configured to electrically separate the electric line 12 when applying a voltage (U), the switching device is configured to apply the voltage (U) to the electromagnetic isolating device (16) according to a trigger signal (trig), and the control device is used for detecting the presence of a fault current and/or an arc in/on the electric line 12 and generating the trigger signal (trig) used for the switching device under the presence of the fault current and/or arc, wherein the control device (18) is configured to detect the zero-crossing of the voltage (U) and generate the trigger signal used for the switching device (T1) according to the detected zero-crossing.
Description
Technical field
The present invention relates to a kind of circuit arrangement for electrical protective device.In addition, the present invention relates to a kind of for moving the method for electrical protective device.
Background technology
In electrical installation system, conventionally make Protector for using electricity.The example of electrical protective device is failture current protection device and protects electric facility to avoid the fault arc protection device damaging by fault electric arc, by described failture current protection device, can prevent fault current ground connection.Protective device need to have the circuit arrangement of simulation and/or digital unit conventionally, can detection failure electric current or electric arc by described circuit arrangement.In addition, by sort circuit device, can export for controlling the triggering signal of separator, described triggering signal causes, circuit or the electric line of identifying therein out of order installation system are separated with electric feedway electricity.
If there is fault current or electric arc, need mechanical-electric coupling, by described mechanical-electric coupling, circuit or circuit can be separated with feedway.Very the favourable solution of cost can realize by electromagnetic separation according to moving-coil (Tauchspule) principle.This electromagnetic separation has coil, by described coil, can make pushrod movement.By the motion of push rod, can make electrical contacts open.At this, must provide sufficiently high electromagnetic force by coil, so that electrical contacts can be separated with push rod.Coil is connected with voltage conventionally.Because in electric system, provide the service voltage in 50V to 400V scope to move all parts, so must guarantee on the one hand, electromagnetic separation also provides enough power for opening contact site in the situation that of low-voltage.On the other hand, electromagnetic separation does not allow to be damaged in high-tension situation yet.
In order to meet this two requirements, follow so far three kinds of different solutions.On the one hand, can provide also can be for high-tension coil.In order to make coil in the situation that the high-energy of this appearance or power are not damaged yet, need a large amount of windings and corresponding wire cross section.Another kind of possibility is, uses the coil that is designed to low voltage, and by the electrical power in voltage regulator limiting coil.Finally, can use electromagnetic separation, described electromagnetic separation triggers in very low electrical power situation.For this reason, for example can use magnetic switch.The execution mode of all descriptions needs structure space additional in electrical protective device and causes additional expense.
Summary of the invention
Therefore, task of the present invention is, the circuit arrangement of described type is at the beginning provided, can be simpler and cost running protection device advantageously more by it.
Described task is had the circuit arrangement of feature claimed in claim 1 and is solved by a kind of method with feature claimed in claim 8 by a kind of.Favourable improvement project of the present invention illustrates in the dependent claims.
According to of the present invention, circuit arrangement for electrical protective device comprises electric line, electromagnetic separation, switching device, control device, described electromagnetic separation is configured to make electric line electricity separated when applying voltage, described switching device is configured to according to triggering signal, voltage is applied on electromagnetic separation, described control device for detection of in electric line/on fault current and/or the existence of electric arc and for produce the triggering signal for switching device in the situation that fault current and/or electric arc exist, wherein control device is configured to, detect the zero crossing of voltage and produce the triggering signal for switching device according to detected zero crossing.
Circuit arrangement can be used to failture current protection device and/or fault arc protection device.Circuit arrangement can be arranged in the housing of electrical protective device.Circuit arrangement comprises at least one electric line, in described electric line, can apply voltage, especially alternating voltage.Circuit arrangement can also be used in polyphase system.In addition, circuit arrangement comprises the electromagnetic separation of protective device, and described electromagnetic separation can be constructed according to moving-coil principle.The binding post of electromagnetic separation can be connected with electric line.In order to move electromagnetic separation, can give this electromagnetic separation service voltage.For this reason, can use the switching device that is for example constructed to thyristor, by this switching device electromagnetic separation, can be connected with additional ground wire with electric line.After electromagnetic separation is connected with ground wire with circuit, on their binding post, apply voltage.This causes that electric current flows through the coil of electromagnetic separation.Due to the electromagnetic force of coil, make the movable pushrod movement of electromagnetic separation.By the motion of push rod, contact site that can separate wires road.
In addition, described circuit arrangement comprises control device, and described control device is configured to, detect in electric line/on or the circuit that is connected with electric line in fault current and/or electric arc.Be alternative in this place, control device can receive the signal of outside checkout gear, by checkout gear detection failure electric current and/or the electric arc of described outside.If fault current and/or electric arc detected, control device can be exported triggering signal to switching device, and due to described triggering signal, switching device is applied to voltage on electromagnetic separation.By voltage is applied on electromagnetic separation, electromagnetic separation is activated and electric line is separated.
If electromagnetic separation or its coil are connected with voltage at any time, electric current flows through coil always, until voltage reaches next zero crossing.This means, electric current maximum flows through coil on the duration of half-wave.Control device is additionally configured to, and detects the zero crossing of voltage and carrys out manipulation of switches device according to the zero crossing detecting.Can regulate and reduce the energy absorption of coil thus.This makes it possible to use the electromagnetic separation with coil, and described coil has the winding of smaller amounts and/or less wire cross section.Therefore can save cost and structure space.
Control device is preferably configured to, and produces the triggering signal for switching device after the predetermined duration on the time after detected zero crossing.The duration of current flowing can accurately be mated by the coil of electromagnetic separation thus.
In another expansion scheme, control device is configured to, and produces for the described duration after the lasting zero crossing detecting of triggering signal of switching device on the time after the lower threshold of predetermining and before the upper limit threshold of predetermining.Therefore in other words, predetermine a time interval, control device manipulation of switches device in the described time interval.Threshold value can be kept in the memory of control device.Therefore, can especially accurately control the electromagnetic separation of electrical protective device.
In addition advantageously, control device is configured to determine according to the current operating temperature of electromagnetic separation the lower threshold of predetermining.Control device can be connected with temperature sensor, described temperature sensor and electromagnetic separation coupling.Can control especially reliably electromagnetic separation thus.
In one embodiment, control device is configured to, and produces the triggering signal that is used for switching device according to the triggered time of electromagnetic separation.Triggered time corresponding to the moment being connected with voltage at electromagnetic separation and until electric line by electromagnetic separation by electricity the duration between separated moment.By considering the triggered time of separator, can guarantee the reliability service of electrical protective device.
In a kind of expansion scheme, control device is configured to, and according to the mean value of voltage and/or effective value, asks for zero crossing.Additionally, can be to voltage commutation before detecting by control device.Control device can have analogue-to-digital converters, and described analogue-to-digital converters are connected with calculation element.Therefore can determine by simple mode the zero crossing of voltage.
In another embodiment, voltage divider is connected between control device and electric line.Therefore can realize, an only dividing potential drop of voltage drops on control device.Its amplitude can be that this dividing potential drop of only a few percent of voltage amplitude can be detected by the calculation element in control device or common electronic unit simply.
According to of the present invention, for moving the method for electrical protective device, comprise electric line is provided, the electromagnetic separation that is configured to electricity separate wires road when applying voltage is provided, provide and be configured to, according to triggering signal, voltage is applied to the switching device on electromagnetic separation, by control device detect in electric line/on fault current and/or the existence of electric arc, the in the situation that of fault current and/or electric arc existence, by control device, produce the triggering signal for switching device, by control device, detect the zero crossing of voltage and according to detected zero crossing, produce the triggering signal for switching device by control device.
Previously with install in a circuit according to the invention associated advantage and the improvement project of describing and can transfer in the method according to this invention in an identical manner.
Preferably, on the time, after the lower threshold of predetermining and before the upper limit threshold of predetermining, by control device, produce for the described duration after the lasting zero crossing detecting of triggering signal of switching device.
In one embodiment, the upper limit threshold of predetermining is asked for by the power measurement of the Static and dynamic on electromagnetic separation, produces the triggering signal for switching device before the described upper limit threshold of predetermining.When design circuit device, can carry out the corresponding measurement on electromagnetic separation.Can determine reliably the triggered time of electromagnetic separation thus.
In another embodiment, the lower threshold of predetermining is asked for according to calculating and/or the load testing carried out on electromagnetic separation, produces the triggering signal for switching device after the described lower threshold of predetermining.At this, it is also conceivable that different value or the temperature impact of voltage amplitude.Can move especially reliably electromagnetic separation according to ambient environmental conditions thus.
Accompanying drawing explanation
Explain in detail with reference to the accompanying drawings now the present invention.At this, unique figure illustrates circuit arrangement schematically to illustrate.
The embodiment describing in detail is subsequently the preferred embodiment of the present invention.
Embodiment
Accompanying drawing illustrates the schematic diagram for the circuit arrangement 10 of electrical protective device.This electrical protective device can be failture current protection device (Residual Current Detector: residual current detector, RCD) or fault arc protection device (Arc Fault Detection Device: arc fault sniffer, AFDD).Circuit arrangement 10 has the first electric line 12 and the second electric line 14. Electric line 12,14 with at this unshowned electric feedway, be connected---for example, with Power supply network---.Between two electric line 12,14, apply voltage U, especially alternating voltage.At this, the second electric line is connected with ground binding post 20.
In addition, circuit arrangement 10 has electromagnetic separation 16, and described electromagnetic separation has coil L1 and at this unshowned push rod.Electromagnetic separation 16 is set up according to moving-coil principle.If with electric current flowing through coil L1, make the corresponding contact portion in pushrod movement and electric line 12 be opened.Therefore, electric line 12 is separated with feedway or voltage U electricity.
In addition, circuit arrangement 10 has switching device T1.Switching device T1 for example can be constructed to thyristor.Two electric line 12 can be connected by switching device T1 with 14.This causes, electric current flows through coil L1 and electric line 12 is separated.In addition, the first diode D1 is set, this first diode and coil L1 are connected in series.Can be to flowing through the current commutates of coil L1 by diode D1.The the second diode D2 prevention walking abreast with coil L1 in cut-off direction forms overvoltage in flowing into coil L1 due to electric current.
In addition, circuit arrangement 10 has control device 18.By control device 18, can detect fault current or the electric arc in electric line 12,14 according to application scenarios.For detection failure electric current or in order to identify electric arc, outside checkout gear can also be set, the checkout gear of described outside transmits corresponding signal to control device 18 in the situation that of fault current or electric arc existence.If confirm fault current and/or electric arc, by control device 18 output triggering signal trig.This triggering signal trig is transferred to switching device T1.After receiving triggering signal trig, closing switch device 18, applies voltage U at coil L1 place thus and coil L1 is flow through by electric current.This causes, pushrod movement and electric line 12 are spaced.If switching device T1 is constructed to thyristor, control signal trig can be used as the grid connection terminal that electric current or current impulse are transferred to thyristor, and thyristor is lighted and is switched on conducting direction thus.
If electromagnetic separation 16 or coil L1 are connected with voltage U at any time, electric current flows through coil L1 always, until voltage U reaches next zero crossing.This means, electric current maximum flows through coil L1 on the duration of half-wave.The duration of half-wave is in the situation that to have the voltage U of 50Hz frequency be 10ms.According to the resistance R of cycle duration T, voltage U, angular frequency, time t and coil L1
l, the ceiling capacity that can calculate in this formation absorbs E
max:
By control device 18, now can be according to the zero crossing manipulation of switches device T1 of voltage U.Especially by control device 18 can also be in time after the duration of predetermining trigger switch device T1.The alternative described duration can also be distributed phase angle [alpha].According to following formula, calculate and phase angle
relevant energy absorption
:
If control device 18 is at the phase angle of 90 °
, in the situation that the duration trigger switch device T1 of 5ms after the zero crossing of voltage U, energy absorption can reduce 1/2nd.If the phase angle at 115 °
or in the situation that after zero crossing the duration of about 6.3ms by control device 18, realize the triggering of switching device T1, energy absorption can reduce 3/4ths.
In addition, can also predetermine the time interval after reaching the zero crossing of voltage U, in the described time interval, control device 18 trigger switch device T1.Angular spacing can also be predetermined in replacement time interval.Namely predetermine lower threshold and the upper limit threshold of duration, wherein control device 18 trigger switch device T1 in the time interval between lower threshold and upper limit threshold.At this, it is also conceivable that the triggering duration of electromagnetic separation 16.Threshold value can be for example kept in the memory of the control device 18 that is specifically designed to electromagnetic separation 16 with the form of mathematical function or form.Described threshold value can be by the calculate and measurement of previously carrying out on electromagnetic separation 16, to ask for.
The upper limit threshold of duration can shift to an earlier date according to the static or dynamic power measurement on electromagnetic separation 16 to be asked for.The upper limit threshold of duration can calculate or load testing is asked for by theory.In addition, control device 18 can be configured to, in the temperature of current detection electromagnetic separation 16 and according to this Temperature Matching lower limit time threshold.
By the triggering of control switch device T1, can reduce to flow through coil L1 electric current duration and therefore reduce the energy absorption of coil L1.This makes it possible to use the electromagnetic separation 16 with coil L1, and described coil has the winding of lesser amt and/or less wire cross section.Therefore can save cost and structure space.
Reference numerals list
10 circuit arrangements
12 circuits
14 circuits
16 separators
18 control device
20 ground binding posts
22 voltage dividers
Dl diode
D2 diode
L1 coil
R1 resistance
R2 resistance
R3 resistance
Trig triggering signal
T1 switching device
U voltage.
Claims (11)
1. for the circuit arrangement (10) of electrical protective device, have:
-electric line (12),
-electromagnetic separation (16), described electromagnetic separation is configured to, and makes electric line (12) electricity separated when applying voltage (U),
-switching device (T1), described switching device is configured to, and according to triggering signal (trig), described voltage (U) is applied to described electromagnetic separation (16) upper,
-control device (18), described control device for detection of in described electric line (12)/on fault current and/or the existence of electric arc and for produce the triggering signal (trig) for described switching device (T1) in the situation that fault current and/or electric arc exist
It is characterized in that,
-described control device (18) is configured to, and detects the zero crossing of described voltage (U) and produces the triggering signal (trig) for described switching device (T1) according to detected zero crossing.
2. circuit arrangement according to claim 1 (10), it is characterized in that, described control device (18) is configured to, and produces the triggering signal (trig) for described switching device (T1) after the predetermined duration on the time after detected zero crossing.
3. circuit arrangement according to claim 1 and 2 (10), it is characterized in that, described control device (18) is configured to, and produces for the described duration after the lasting zero crossing detecting of triggering signal (trig) of described switching device (T1) on the time after the lower threshold of predetermining and before the upper limit threshold of predetermining.
4. circuit arrangement according to claim 3 (10), is characterized in that, described control device (18) is configured to, the lower threshold of predetermining described in determining according to the current operating temperature of described electromagnetic separation (16).
5. according to the circuit arrangement (10) described in one of above claim, it is characterized in that, described control device (18) is configured to, and produces the triggering signal (trig) for described switching device (T1) according to the triggered time of described electromagnetic separation (16).
6. the circuit arrangement (10) according to one of above claim, is characterized in that, described control device (18) is configured to, and according to the mean value of described voltage (U) and/or effective value, asks for described zero crossing.
7. the circuit arrangement (10) according to one of above claim, is characterized in that, voltage divider (22) is connected between described control device (18) and described electric line (12).
8. for move the method for electrical protective device by following action:
-electric line (12) is provided,
-electromagnetic separation (16) that is configured to when applying voltage (U) the separated described electric line of electricity (12) is provided,
-provide to be configured to, according to triggering signal (trig), voltage (U) is applied to the switching device (T1) on described electromagnetic separation (16),
-by control device (18) detect in described electric line (12)/on fault current and/or the existence of electric arc, and
-in the situation that of fault current and/or electric arc existence, by described control device (18), produce the triggering signal for described switching device (T1),
It is characterized in that,
-by described control device (18), detect the zero crossing of described voltage (U), and
-by described control device (18), according to detected zero crossing, produce the triggering signal (trig) for described switching device (T1).
9. method according to claim 8, it is characterized in that, on the time, after the lower threshold of predetermining and before the upper limit threshold of predetermining, by control device (18), produce for the described duration after the lasting zero crossing detecting of described triggering signal (trig) of described switching device (T1).
10. method according to claim 9, it is characterized in that, the described upper limit threshold of predetermining is asked for by the static and/or dynamic power measurement on described electromagnetic separation (16), produces the triggering signal (trig) for described switching device (T1) before the described upper limit threshold of predetermining.
11. according to the method described in claim 9 or 10, it is characterized in that, the described lower threshold of predetermining, according to asking at upper calculating and/or the load testing of carrying out of described electromagnetic separation (16), produces the triggering signal (trig) for described switching device (T1) after the described lower threshold of predetermining.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102012215310.1A DE102012215310B4 (en) | 2012-08-29 | 2012-08-29 | Circuit arrangement for an electrical protective device |
| DE102012215310.1 | 2012-08-29 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103683182A true CN103683182A (en) | 2014-03-26 |
| CN103683182B CN103683182B (en) | 2019-04-30 |
Family
ID=49119109
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310384177.1A Active CN103683182B (en) | 2012-08-29 | 2013-08-29 | Circuit device for electrical protective device |
Country Status (4)
| Country | Link |
|---|---|
| CN (1) | CN103683182B (en) |
| DE (1) | DE102012215310B4 (en) |
| GB (1) | GB2505561B (en) |
| IT (1) | ITMI20131400A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109212387A (en) * | 2017-07-06 | 2019-01-15 | 默森美国纽柏立波特-马萨诸塞州有限责任公司 | The method for carrying out alternating current arc fault detection using multidimensional energy point |
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| US5715125A (en) * | 1995-05-04 | 1998-02-03 | Leviton Manufacturing Co., Inc. | Intelligent ground fault circuit interrupter |
| GB2374218A (en) * | 2001-04-06 | 2002-10-09 | John Russell Fielden | Switch & switching circuit |
| CN1411012A (en) * | 2002-11-26 | 2003-04-16 | 莫红文 | Under voltage/subexcitation drop-away device circuit |
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| CN202267171U (en) * | 2011-10-19 | 2012-06-06 | 珠海格力电器股份有限公司 | Air-conditioner with auxiliary heating system |
| CN102568963A (en) * | 2012-02-16 | 2012-07-11 | 常州工学院 | Alternating current shunt tripper suitable for working with alternating current relay in series |
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| US5963406A (en) * | 1997-12-19 | 1999-10-05 | Leviton Manufacturing Co., Inc. | Arc fault detector with circuit interrupter |
| US6362628B2 (en) * | 1998-12-21 | 2002-03-26 | Pass & Seymour, Inc. | Arc fault circuit detector device detecting pulse width modulation of arc noise |
| US6433977B1 (en) * | 1999-04-16 | 2002-08-13 | Pass & Seymour, Inc. | Combo AFCI/GFCI with single test button |
| US6504692B1 (en) * | 2000-04-06 | 2003-01-07 | Pass & Seymour, Inc. | AFCI device which detects upstream and downstream series and parallel ARC faults |
| US20030151478A1 (en) * | 2001-10-02 | 2003-08-14 | Dejan Radosavljevic | Protection device with lockout test |
| US7003435B2 (en) * | 2002-10-03 | 2006-02-21 | Leviton Manufacturing Co., Inc. | Arc fault detector with circuit interrupter |
| DE102011080523A1 (en) * | 2011-08-05 | 2013-02-07 | Siemens Aktiengesellschaft | Arc fault protection switch with overvoltage protection |
-
2012
- 2012-08-29 DE DE102012215310.1A patent/DE102012215310B4/en active Active
-
2013
- 2013-07-23 GB GB1313092.7A patent/GB2505561B/en active Active
- 2013-08-23 IT IT001400A patent/ITMI20131400A1/en unknown
- 2013-08-29 CN CN201310384177.1A patent/CN103683182B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5715125A (en) * | 1995-05-04 | 1998-02-03 | Leviton Manufacturing Co., Inc. | Intelligent ground fault circuit interrupter |
| GB2374218A (en) * | 2001-04-06 | 2002-10-09 | John Russell Fielden | Switch & switching circuit |
| CN1411012A (en) * | 2002-11-26 | 2003-04-16 | 莫红文 | Under voltage/subexcitation drop-away device circuit |
| US7440245B2 (en) * | 2004-09-28 | 2008-10-21 | Eaton Corporation | Arc fault circuit interrupter and method of detecting an arc fault |
| CN201805222U (en) * | 2010-06-28 | 2011-04-20 | 沈阳工业大学 | Series fault arc detection device adopting wavelet entropy |
| CN202267171U (en) * | 2011-10-19 | 2012-06-06 | 珠海格力电器股份有限公司 | Air-conditioner with auxiliary heating system |
| CN102568963A (en) * | 2012-02-16 | 2012-07-11 | 常州工学院 | Alternating current shunt tripper suitable for working with alternating current relay in series |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109212387A (en) * | 2017-07-06 | 2019-01-15 | 默森美国纽柏立波特-马萨诸塞州有限责任公司 | The method for carrying out alternating current arc fault detection using multidimensional energy point |
| CN109212387B (en) * | 2017-07-06 | 2020-12-29 | 默森美国电力股份有限公司 | Method for AC arc fault detection using multi-dimensional energy points |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2505561A (en) | 2014-03-05 |
| CN103683182B (en) | 2019-04-30 |
| GB2505561B (en) | 2015-05-27 |
| GB201313092D0 (en) | 2013-09-04 |
| DE102012215310B4 (en) | 2020-09-03 |
| DE102012215310A1 (en) | 2014-03-06 |
| ITMI20131400A1 (en) | 2014-03-01 |
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