CN105849850B - Breaker - Google Patents
Breaker Download PDFInfo
- Publication number
- CN105849850B CN105849850B CN201480070782.4A CN201480070782A CN105849850B CN 105849850 B CN105849850 B CN 105849850B CN 201480070782 A CN201480070782 A CN 201480070782A CN 105849850 B CN105849850 B CN 105849850B
- Authority
- CN
- China
- Prior art keywords
- wiring
- breaker
- pass filter
- electrically connected
- low
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/04—Arrangements for preventing response to transient abnormal conditions, e.g. to lightning or to short duration over voltage or oscillations; Damping the influence of dc component by short circuits in ac networks
-
- 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
- H02H3/34—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 of a three-phase system
- H02H3/347—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 of a three-phase system using summation current transformers
Abstract
A kind of breaker is provided, wherein the breaker and the length of wiring independently, be not easily susceptible to the influence of electromagnetic wave noise.Processing circuit (4) is electrically connected via the first wiring (71) to one end of current transformer (3), and via the other end of the second wiring (72) electrical connection to current transformer (3).Blocking unit (5) blocks the electric current for flowing through electric line (2) by receiving the output from processing circuit (4).First resistor device (61) is electrically connected between the first wiring (71) and the second wiring (72), and forms the path for allowing the secondary current of current transformer (3) to flow through.Potential difference between the first wiring (71) of test section (41) detection and the second wiring (72).Judging part (42) is configured as based on potential difference detected by test section (41) to determine whether blocking unit (5) is made to work.
Description
Technical field
The present invention relates generally to breakers, and in particular to include the breaker of current transformer.
Background technique
Traditionally, following breaker is had been provided for, wherein the breaker is configured as monitoring by using current transformer
The electric current of electric line is flowed through, and blocks the electric line in the flowing for detecting abnormal current.As this breaker, example
Such as, it is known to for coming the molded case circuit breakers of detection of excessive current and short circuit current, Yi Jiyong by using current transformer (CT)
In the leakage circuit breakers etc. for the flowing for detecting the caused abnormal current of electric leakage by using zero phase current transformer (ZCT).
For example, document 1 (JP 3875167B2) discloses a kind of leakage circuit breakers, including：Current transformer (zero phase current transformer：
ZCT)；Detection of electrical leakage portion is configured as the output based on current transformer to detect whether that ground fault has occurred；And electromagnetic wire
Circle makes blocking swtich work for the detection operation in response to detection of electrical leakage portion.The leakage circuit breakers described in document 1
In, detection of electrical leakage portion includes by the electric leakage decision circuitry of semiconducter IC realization, and the electric leakage decision circuitry and current transformer (ZCT)
Via a pair of wiring (electric wire) electrical connection.
In the case where having supplied electromagnetic wave noise externally to this breaker, may be sent out in electric leakage decision circuitry
Raw undesirable operation.For example, wiring possibly serves for antenna and electromagnetic wave noise may induce high-frequency electrical in this wiring
Stream, and even if blocking swtich is also possible to work there is no ground fault.In this respect, document 1
Disclosed in leakage circuit breakers include capacitor, the respective first end of these capacitors is connected to corresponding cloth in following position
Line：The corresponding wiring line is divided into partitioning portion by the position, and one of partitioning portion is so that the length of each partitioning portion is small
In it is assumed that electromagnetic wave noise 1/4 wavelength mode be connected to current transformer or electric leakage decision circuitry.The second of these capacitors
End ground connection.For example, it is assumed that frequency is the electromagnetic wave noise of 1 [GHz] (1/4 wavelength is 75 [mm]), each capacitor
Device is connected to the corresponding wiring line in these wirings in following position：The corresponding wiring line is divided into the length of each partitioning portion by the position
Spend the partitioning portion less than 75 [mm].
In the leakage circuit breakers disclosed in document 1, the high-frequency current induced in wiring flows to ground terminal.Therefore,
Seem to have carried out 2 segmentations by capacitor in terms of being routed in high fdrequency component.Each wiring includes that respective length is less than electromagnetic wave noise
1/4 wavelength partitioning portion, therefore inhibit the covibration of high-frequency current and high-frequency current does not increase.Therefore, literary
Structure disclosed in offering 1 can prevent the undesirable operation of electric leakage decision circuitry.
Structure disclosed in document 1 reduces the technology of the influence of electromagnetic wave noise based on the length by adjusting wiring.
In the art, it is assumed that the electromagnetic wave noise in frequency band is higher than 1 [GHz], capacitor must will be routed segmentation
The wiring is connected at the position respectively than the part of 75 [mm] much shorters.However, due to the object being considered as between electric component
Reason interference, therefore the position that can be used for connecting with capacitor in wiring is restricted.Therefore, in relatively high frequency band
Electromagnetic wave noise may cannot achieve the desired length of the partitioning portion of wiring.Therefore, in the breaker based on above-mentioned technology
In, according to the frequency band of electromagnetic wave noise, the influence of electromagnetic wave noise possibly can not be reduced.Thus radiation immunity may be not enough.
Summary of the invention
The present invention is to make in view of said circumstances, and the object of the present invention is to provide unrelated with the length of wiring
Ground, be not easily susceptible to electromagnetic wave noise influence breaker.
A kind of breaker according to aspects of the present invention, which is characterized in that including：At least one electric line；Current transformer,
It is configurable to generate size and depends on the secondary current for flowing through the size of primary current of at least one electric line；Processing electricity
Road, via the first wiring electrical connection to one end of the current transformer, and via the second wiring electrical connection to the change
Flow the other end of device；Blocking unit is configured to respond to the output from the processing circuit, come block flow through it is described at least
The electric current of one electric line；And first resistor device, it is electrically connected between first wiring and second wiring, with
Form path for allowing the secondary current to flow through, wherein the processing circuit includes：Test section is configured as examining
Survey the potential difference between first wiring and second wiring；And judging part, it is configured as based on the test section
Detected potential difference is to determine whether make the blocking unit work.
Detailed description of the invention
Fig. 1 is the circuit diagram for showing the schematic construction of the breaker according to embodiment 1.
Fig. 2 is the circuit diagram for showing the schematic construction of the breaker according to embodiment 1.
Fig. 3 is the circuit diagram for showing the schematic construction of the breaker according to embodiment 2.
Fig. 4 is the circuit diagram for showing the topology example 1 according to the breaker of embodiment 2.
Fig. 5 is the circuit diagram for showing the topology example 2 according to the breaker of embodiment 2.
Fig. 6 is the circuit diagram for showing the topology example 3 according to the breaker of embodiment 2.
Fig. 7 is the circuit diagram for showing the topology example 4 according to the breaker of embodiment 2.
Fig. 8 is the circuit diagram for showing the variation of the breaker according to embodiment 2.
Specific embodiment
Embodiment 1
As shown in Figure 1, according to the breaker 1 of the present embodiment include at least one electric line 2, current transformer 3, processing circuit 4,
Blocking unit 5 and first resistor device 61.Current transformer 3 is configurable to generate size dependent on flowing through the primary of at least one electric line 2
The secondary current of the size of electric current.Processing circuit 4 is electrically connected via the first wiring 71 to the first end of current transformer 3, and is passed through
By the second end of 72 electrical connection of the second wiring to current transformer 3.Blocking unit 5 is configured to respond to from the defeated of processing circuit 4
The electric current for flowing through at least one electric line 2 is blocked out.First resistor device 61 is electrically connected to the first wiring 71 and the second wiring
Between 72, to form the path for allowing secondary current to flow through.
Processing circuit 4 includes test section 41 and judging part 42.Test section 41 is configured as the first wiring 71 and second of detection
Potential difference between wiring 72.Judging part 42 is configured as based on potential difference detected by test section 41 to determine whether making to hinder
Disconnected portion 5 works.
In other words, it is had the following structure as shown in Figure 1 according to the breaker of the present embodiment 1：First resistor device 61 is electrical
It is connected between a pair of of the wiring (the first wiring 71 and the second wiring 72) being connected with current transformer 3.In breaker 1, processing
Circuit 4 is configured as detecting the potential difference between a pair of wiring via a pair of wiring electrical connection to current transformer 3,
And blocking unit 5 is made to work according to the potential difference.
In the present embodiment, breaker 1 is illustrated using leakage circuit breakers, wherein the leakage circuit breakers is configured as detecting
Electric leakage caused abnormal current, and at least one electric line 2 is blocked in response to detecting the abnormal current.As electric leakage
The breaker 1 of breaker includes zero phase current transformer (ZCT) as current transformer 3, and as shown in Figure 1, includes multiple (in this implementation
It is three in example) Primary Conductor of the electric line 21,22 and 23 as current transformer 3.More specifically, current transformer 3 includes by ferromagnetism
Material is made and the secondary winding 32 with cricoid core 31 and winding core 31.Electric line 21,22 as Primary Conductor
The hollow space for passing through core 31 with 23.
Respectively inserted with contact device 51,52 and 53 in electric line 21,22 and 23.Blocking unit 5 include contact device 51,
52 and 53 and the electromagnetic coil 54 that is electrically connected between electric line 21 and 23 and thyristor 55 series circuit.Thyristor
55 control terminal (gate terminal) is electrically connected to the output terminal of processing circuit 4.In blocking unit 5, from processing circuit 4
When receiving disabling signal, thyristor 55 is connected, and electromagnetic coil 54 is so excited so as to contact device 51,52 and 53 and opens
It puts.
Breaker 1 as the leakage circuit breakers configured as described above can be set for supplying via three distribution wires
To in the phase three-wire three formula distribution system of three-phase AC (exchange) electric power, and it is inserted into these distribution wires and can be configured
To block power supply when ground fault occurs.Specifically, in breaker 1, cause to flow since ground fault occurs
The electric current of electric line 21,22 and 23 through the core 31 across current transformer 3 becomes in unbalanced situation, and secondary current flows through secondary
Winding 32.Thus, processing circuit 4 detects the secondary current, and blocking unit 5 is made to work.Note that flowing through secondary winding
The size (current value) of 32 secondary current depends on the primary current for flowing through the electric line 21,22 and 23 as Primary Conductor
Size.
The breaker 1 according to the present embodiment is further described below with reference to Fig. 2.However, knot as described below
Structure is only example, and the embodiment of the present invention is not limited to following embodiment, and can be without departing from technology of the invention
Following embodiment is modified in the case where concept in various ways.Fig. 2 shows the only ones of the Primary Conductor as setting current transformer 3
Electric line 2.However, using multiple electric lines 21,22 and 23 as Primary Conductor in the case where leakage circuit breakers.
In breaker 1, one end (the of the secondary winding 32 (referring to Fig. 1) of 71 electrical connection of the first wiring to current transformer 3
One end), and the second wiring 72 is electrically connected to the other end (second end) of the secondary winding 32 of current transformer 3.In other words, become
Stream device 3 include with as a pair of output opposite end secondary winding 32, and in secondary winding 32 generate size according to
Lai Yu flows through the secondary current of the size of the primary current of at least one electric line 2.Processing circuit 4 is electrical via the first wiring 71
The output end (the first output end) being connected in a pair of output of current transformer 3, and electrically connect via the second wiring 72
Another output end (second output terminal) being connected in a pair of output.
As shown in Fig. 2, in breaker 1, first resistor device 61 be electrically connected to the first wiring 71 and the second wiring 72 it
Between.Therefore, in the secondary winding 32 of current transformer 3 generate secondary current in the case where, first wiring 7 and second wiring 72 it
Between there may be potential differences.That is, the secondary current induced in secondary winding 32 flows through first the 71, first electricity of wiring
Hinder device 61 and second wiring 72, as a result at first resistor device 61 voltage decline cause first wiring 71 and second wiring 72 it
Between generate potential difference.
In this respect, in the breaker of the present embodiment 1, as described above, processing circuit 4 includes：Test section 41 is matched
The potential difference being set between detection the first wiring 71 and the second wiring 72；And judging part 42, it is configured as being based on being detected
To potential difference so that the blocking unit 5 is worked.In the present embodiment, test section 41 includes being put using the difference of operational amplifier
Big device circuit, and it is configured as electricity of the output dependent on the difference between the current potential of the first wiring 71 and the current potential of the second wiring 72
Pressure by the way that potential difference to be given to gain amplifies generated voltage.However, test section 41 is not limited to put using operation
The differential amplifier circuit of big device, and may include other structures.
Judging part 42 is configured as receiving the voltage value exported from test section 41 as input value, and by the input value and
Predetermined threshold is compared.Specifically, judging part 42 includes comparator, and is configured as in the input value from test section 41
In the case where more than threshold value, to 5 output drive signal of blocking unit.Therefore, at least one electric line 2 is flowed through in abnormal current and feel
Secondary current should be gone out, thus due to leading to the defeated of judging part 42 there are potential difference between the first wiring 71 and the second wiring 72
Enter value more than in the case where threshold value, processing circuit 4 is to 5 output drive signal of blocking unit so that blocking unit 5 works.
In the breaker 1 of the present embodiment, at least one electric line 2, current transformer 3, processing circuit 4, blocking unit 5, first
The wiring of resistor 61, first 71 and the second wiring 72 are arranged in a shell.In the present embodiment, processing circuit 4 includes special
Specific integrated circuit (ASIC).(the ginseng of thyristor 55 of processing circuit 4, first resistor device 61 including ASIC and blocking unit 5
See Fig. 1) it is mounted on the circuit substrate accommodated in shell.Therefore, the first wiring 71 and/or the second wiring 72 may include electricity
Patterned conductor, lead terminal, cable and the electric wire of secondary winding for being connected to current transformer 3 on base board etc..Processing circuit 4
It is connected to supply voltage point 91 and circuit ground end 92, and by applying between supply voltage point 91 and circuit ground end 92
Voltage come worked (energization).
In the breaker 1 of above-mentioned the present embodiment, potential difference is generated between the first wiring 71 and the second wiring 72
In the case of, at least one electric line 2 is blocked, therefore breaker 1 is not easily susceptible to influence and the tool of external electromagnetic wave noise
There is relatively high radiation immunity.In the case where detailed description, external electromagnetic wave noise will usually influence in the same manner
First wiring 71 and the second wiring 72, thus will not influence the potential difference between the first wiring 71 and the second wiring 72.In this reality
It applies in the breaker 1 of example, processing circuit 4 is configured as based on the first wiring 71 and the second wiring 72 detected by test section 41
Between potential difference so that the blocking unit 5 is worked.Therefore, the breaker 1 of the present embodiment, which has, is not easily susceptible to electromagnetic wave noise
Influence and being less likely the advantages of carrying out undesirable operation.
In other words, in the breaker 1 according to the present embodiment, the removal of processing circuit 4 first wiring 71 and the second wiring
Common-mode noise between 72, and the only signal of detection the first wiring 71 and the differential mode in the second wiring 72.Therefore, because electromagnetism
The wave noise high-frequency current that may induce in the first wiring 71 and the second wiring 72 is common-mode noise, thus processing circuit 4
The high-frequency current can be removed.Therefore, according to the breaker of the present embodiment 1 have with the length of wiring independently, be not easily susceptible to
The advantages of influence of electromagnetic wave noise.
As a result, breaker 1 can reduce the influence of electromagnetic wave noise about the electromagnetic wave noise in relatively high frequency band,
And breaker 1 has sufficient radiation immunity.For example, " IEC60947-2 " is for leakage circuit breakers definition and 80 [MHz]
The related regulation of radiation immunity in the range of~2.7 [GHz].In this respect, breaker 1 is 2.7 [GHz] for frequency
The electromagnetic wave noise of (1/4 wavelength is about 27 [mm]) has sufficient radiation immunity.
Leakage circuit breakers etc. needs relatively high radiation immunity using the breaker 1 of zero phase current transformer (ZCT),
This is because the breaker 1 needs to detect the weak secondary current induced by the primary current for flowing through at least one electric line 2.
As described above, the breaker 1 of the present embodiment has sufficiently high radiation immunity for the electromagnetic wave noise in relatively high frequency band.
Thus, breaker 1 is particularly suitable for leakage circuit breakers etc..
However, being not limited to leakage circuit breakers according to the technology of the breaker 1 of the present embodiment, and can be applied to any disconnected
Road device, as long as the breaker uses current transformer.For example, can be applied to mould according to the technology of the breaker 1 of the present embodiment
Box-type circuit breaker processed.The molded case circuit breakers are configured as coming detection of excessive current and short circuit current by using current transformer (CT)
Electric line is blocked as abnormal current, and in response to detecting abnormal current.In the breaker, as Primary Conductor
One electric line 2 passes through the hollow space of the core 31 of current transformer 3.The breaker 1 for being configured as molded case circuit breakers is configured
To be detected using processing circuit 4 in the case where abnormal current (overcurrent or short circuit current) flows through Primary Conductor (electric line 2)
The secondary current of the secondary winding 32 of current transformer 3 is flowed through, and blocking unit 5 is made to work.
Embodiment 2
As shown in figure 3, according to the breaker 1 of the breaker 1 of the present embodiment and embodiment 1 the difference is that：According to
The breaker 1 of the present embodiment further includes low-pass filter 8, and wherein the low-pass filter 8 is electrically connected to 61 He of first resistor device
Between processing circuit 4, and the signal component for allowing frequency to be equal to or less than cutoff frequency passes through.Below, utilization is identical
Appended drawing reference specifies element same as Example 1, and suitably omits the explanation for being directed to these elements.Fig. 3~Fig. 8 is shown
The only one electric line 2 of Primary Conductor as setting current transformer 3, but in the case where breaker is leakage circuit breakers, it uses
Multiple electric lines 21,22 and 23 are used as Primary Conductor.
In the breaker 1 of the present embodiment, first resistor device 61 is via 72 electrical connection of the first wiring 71 and the second wiring
To low-pass filter 8.The signal component that low-pass filter 8 allows frequency to be equal to or less than cutoff frequency passes through, and makes frequency
Noise contribution higher than cutoff frequency decays (cut-off).The output end of low-pass filter 8 is via the first wiring 71 and the second wiring
72 are electrically connected to processing circuit 4.In the present embodiment, low-pass filter 8, which is mounted on, is equipped with first resistor device 61 and processing
On the circuit substrate of circuit 4.Therefore, between first resistor device 61 and low-pass filter 8 and low-pass filter 8 and processing circuit
The first wiring 71 and the respective a part of the second wiring 72 between 4 include the patterned conductor on circuit substrate.
According to this structure, breaker 1 can also be using in the removal of low-pass filter 8 first wiring 71 and the second wiring 72
Differential mode noise.That is, breaker 1 be directed to due to by the reflections such as the intracorporal metal assembly of shell thus may unevenly shadow
The electromagnetic wave noise for ringing the first wiring 71 and the second wiring 72, realizes relatively high radiation immunity.
In short, can not only detect the first wiring 71 and second by test section 41 according to the breaker 1 of the present embodiment
Potential difference between wiring 72 simultaneously makes blocking unit 5 be operable to reduce common-mode noise, but also can use low-pass filter 8
To reduce differential mode noise.In other words, breaker 1 can be by using the low-pass filter 8 and use for being used as the first noise reduction unit
Make the test section 41 of the second noise reduction unit to carry out the dual removal of noise, and the radiation immunity of breaker 1 further mentions
It is high.
It is expected that following：In the breaker 1 of the present embodiment, in the first wiring 71 and the second wiring 72 respectively, from low pass
Filter 8 plays the length being shorter in length than from low-pass filter 8 until first resistor device 61 until processing circuit 4
Degree.In short, expectation is following：As shown in figure 3, meeting L1 in the first wiring 71 and the second wiring 72 respectively>The relationship of L2,
Wherein：" L1 " indicates the length of the wiring between first resistor device 61 and low-pass filter 8, and " L2 " indicates low-pass filter
The length of wiring between 8 and processing circuit 4.
In this case, low-pass filter 8 is more closer than from first resistor device 61 from processing circuit 4.In breaker 1,
Can reduce electromagnetic wave noise between low-pass filter 8 and processing circuit 4 the first wiring 71 and the second wiring it is 72 respective
The influence of a part, thus radiation immunity can be improved.In order to shorten the wiring between low-pass filter 8 and processing circuit 4
Length, preferably low-pass filter 8 be located at as close to the position of processing circuit 4.
It is also expected to the low-pass filter 8 from processing circuit 4 until being used as the first noise reduction unit is arranged in such a way
Until distance：So that noise reduction effect can be obtained in the test section 41 for being used as the second noise reduction unit, and it is routed not and outside
The electromagnetic wave noise in portion resonates.Specifically, the length of the wiring between low-pass filter 8 and processing circuit 4 is arranged to be equal to
Or it is longer than 1/4 wavelength of the electromagnetic wave noise of hypothesis, and test section 41 realizes the not noise reduction rate with electromagnetic wave noise resonance.
Therefore, independently with the distance between low-pass filter 8 and processing circuit 4, breaker 1 is for the electromagnetism in relatively high frequency band
Wave noise has high radiation immunity.
In more detail, the breaker 1 of the present embodiment can have according to any in topology example 1~4 as described below
The circuit structure of topology example.
Topology example 1
As shown in figure 4, low-pass filter 8 includes being electrically connected to the first wiring 71 and benchmark electricity in this topology example
First capacitor device 81 between site 9 and the second capacitor being electrically connected between the second wiring 72 and reference potential point 9
82.Reference potential point 9 is the point with constant potential, specifically can be supply voltage point 91 or circuit ground end 92, and
It is circuit ground end 92 in this example.
Specifically, the first end of first capacitor device 81 is electrically connected to the first wiring 71, and the of first capacitor device 81
Two ends are connected to the circuit ground end 92 as reference potential point 9.The tie point with first capacitor device 81 in first wiring 71
Between first resistor device 61 and processing circuit 4.
The first end of second capacitor 82 is electrically connected to the second wiring 72, and the second end connection of the second capacitor 82
To the circuit ground end 92 as reference potential point 9.It is located at first with the tie point of the second capacitor 82 in second wiring 72
Between resistor 61 and processing circuit 4.
According to this topology example, high-frequency noise (noise contribution that frequency is higher than cutoff frequency) in the first wiring 71 via
First capacitor device 81 is released to reference potential point 9.In addition, the high-frequency noise in the second wiring 72 is via 82 quilt of the second capacitor
It is discharged into reference potential point 9.Therefore, it is possible to reduce influence of the high-frequency noise to processing circuit 4, and the radiation of breaker 1 is anti-
Immunity increases.
Topology example 2
As shown in figure 5, low-pass filter 8 includes being electrically connected to the first wiring 71 and the second cloth in this topology example
Third capacitor 83 between line 72.
Specifically, the first end of third capacitor 83 is electrically connected to the first wiring 71, and the of third capacitor 83
Two ends are electrically connected to the second wiring 72.It is located at first resistor device 61 with the tie point of third capacitor 83 in first wiring 71
Between processing circuit 4.Being located at first resistor device 61 with the tie point of third capacitor 83 and handle electric in second wiring 72
Between road 4.
According to this topology example, capacitor (the third capacitor 83) setting as low-pass filter 8 is routed 71 first
And second wiring 72 between.Therefore, it can simplify the layout of wiring, and can use relatively low at realizing the knot originally
Structure.
Topology example 3
As shown in fig. 6, low-pass filter 8 includes being electrically connected to the first wiring 71 and benchmark electricity in this topology example
First capacitor device 81 between site 9 and the second capacitor being electrically connected between the second wiring 72 and reference potential point 9
82.Low-pass filter 8 further includes being inserted in the first wiring in the mode between first resistor device 61 and first capacitor device 81
Second resistor 62 in 71 and the second cloth is inserted in the mode between first resistor device 61 and the second capacitor 82
3rd resistor device 63 in line 72.In other words, second resistor 62 is to be electrically connected to first resistor device 61 and first capacitor
Mode between device 81 is arranged in the first wiring 71.3rd resistor device 63 is to be electrically connected to first resistor device 61 and the second electricity
Mode between container 82 is arranged in the second wiring 72.Reference potential point 9 is the point with constant potential, specifically can be electricity
Source electrical voltage point 91 or circuit ground end 92, and be circuit ground end 92 in this example.
That is, the low-pass filter 8 of this topology example is by the low-pass filter 8 of topology example 1 addition the
What two resistors 62 and 3rd resistor device 63 were constituted.Second resistor 62 is inserted in the midway of the first wiring 71.Second resistance
The first end of device 62 via 71 electrical connection of the first wiring to first resistor device 61, and the second end of second resistor 62 via
First wiring 71 is electrically connected to first capacitor device 81.3rd resistor device 63 is inserted in the midway of the second wiring 72.3rd resistor
The first end of device 63 via 72 electrical connection of the second wiring to first resistor device 61, and the second end of 3rd resistor device 63 via
Second wiring, 72 electrical connection to the second capacitor 82.
In this example, low-pass filter 8 includes resistor (second resistor 62,3rd resistor device 63).Accordingly, there exist
The advantages of high-frequency noise (noise contribution that frequency is higher than cutoff frequency) can be further decreased.As a result, the radiation of breaker 1 is anti-
Immunity further increases.
Topology example 4
As shown in fig. 7, low-pass filter 8 includes being electrically connected to the first wiring 71 and the second cloth in this topology example
Third capacitor 83 between line 72.Low-pass filter 8 further includes between first resistor device 61 and third capacitor 83
Mode be inserted in the 4th resistor 64 in the first wiring 71 and be located at first resistor device 61 and third capacitor 83 it
Between mode be inserted in the 5th resistor 65 in the second wiring 72.In other words, the 4th resistor 64 is to be electrically connected to
Mode between one resistor 61 and third capacitor 83 is arranged in the first wiring 71.5th resistor 65 is to be electrically connected to
Mode between first resistor device 61 and third capacitor 83 is arranged in the second wiring 72.
That is, the low-pass filter 8 of this topology example is by the low-pass filter 8 of topology example 2 addition the
What four resistors 64 and the 5th resistor 65 were constituted.4th resistor 64 is inserted in the midway of the first wiring 71.4th resistance
The first end of device 64 via 71 electrical connection of the first wiring to first resistor device 61, and the second end of the 4th resistor 64 via
First wiring 71 is electrically connected to third capacitor 83.5th resistor 65 is inserted in the midway of the second wiring 72.5th resistance
The first end of device 65 via 72 electrical connection of the second wiring to first resistor device 61, and the second end of the 5th resistor 65 via
Second wiring 72 is electrically connected to third capacitor 83.
In this topology example, low-pass filter 8 includes resistor (the 4th resistor 64, the 5th resistor 65).Therefore,
The advantages of in the presence of high-frequency noise (noise contribution that frequency is higher than cutoff frequency) can be further decreased.As a result, the spoke of breaker 1
Vulnerability to jamming is penetrated to further increase.
Incidentally, as the variation shown in Fig. 8 of the present embodiment, low-pass filter 8 may include having difference
Cutoff frequency multiple (being in this example three) filter circuits 801,802 and 803.In this variation, it is expected that it is more
A filter circuit 801,802 and 803 is higher with the cutoff frequency of filter circuit, then electric from processing circuit 4 to the filter
The shorter mode of the length of the wiring on road is configured multistagely between first resistor device 61 and processing circuit 4.
In the example of fig. 8, it includes tertiary structure below that low-pass filter 8, which has,：Low (kHz) frequency band reduces used
First filter circuit 801, high (MHz) frequency band reduce second filter circuit 802 and superelevation (GHz) frequency band used and reduce institute
Third filter circuit 803.The cut-off of cutoff frequency " f1 ", second filter circuit 802 of first filter circuit 801
Cutoff frequency " f3 " satisfaction " f1 of frequency " f2 " and third filter circuit 803<f2<The relationship of f3 ".
Multiple filter circuits 801,802 and 803 are from 61 side of first resistor device by first filter circuit 801, second
Filter circuit 802 and third filter circuit 803 are arranged in order, so that using being located at from 4 closer proximity of processing circuit
Filter circuit remove the higher noise contribution of frequency.It should be noted that the electromagnetic wave noise of the higher outside of frequency will
Influence the shorter wiring of length.In this respect, in this variation, until the cut-off in filter circuit from processing circuit 4
The length of wiring until the higher filter circuit of frequency is shorter.Accordingly, there exist can efficiently reduce electromagnetic wave noise
The advantages of influence.As a result, the radiation immunity of breaker 1 further increases.
Other structures and function are identical as the structure and function in embodiment 1.
Claims (6)
1. a kind of breaker, which is characterized in that including：
Current transformer is configurable to generate size and depends on the secondary electricity for flowing through the size of primary current of at least one electric line
Stream；
Processing circuit electrically connects via the first wiring electrical connection to one end of the current transformer, and via the second wiring
It is connected to the other end of the current transformer；
Blocking unit is configured to respond to the output from the processing circuit, flows through at least one described electric wire to block
The electric current on road；And
First resistor device is electrically connected between first wiring and second wiring, described for allowing to be formed
The path that secondary current flows through,
Wherein, the processing circuit includes：
Test section is configured as detecting the potential difference between first wiring and second wiring；And
Judging part is configured as based on potential difference detected by the test section to determine whether carrying out the blocking unit
Work,
The breaker further includes low-pass filter, and the low-pass filter is electrically connected to the first resistor device and the place
It manages between circuit, and the signal component for allowing frequency to be equal to or less than cutoff frequency passes through,
In each wiring of first wiring and second wiring, from the low-pass filter to the cloth of the processing circuit
The length of line is shorter than the length from the low-pass filter to the wiring of the first resistor device, but makes an uproar equal or longer than electromagnetic wave
The quarter-wave of sound.
2. breaker according to claim 1, which is characterized in that
The low-pass filter includes：
First capacitor device is electrically connected between first wiring and reference potential point；
Second capacitor is electrically connected between second wiring and reference potential point.
3. breaker according to claim 1, which is characterized in that
The low-pass filter includes third capacitor, is electrically connected between first wiring and second wiring.
4. breaker according to claim 2, which is characterized in that
The low-pass filter further includes：
Institute is arranged in the mode being electrically connected between the first resistor device and the first capacitor device in second resistor
It states in the first wiring, and
Institute is arranged in the mode being electrically connected between the first resistor device and second capacitor in 3rd resistor device
It states in the second wiring.
5. breaker according to claim 3, which is characterized in that
The low-pass filter further includes：
Institute is arranged in the mode being electrically connected between the first resistor device and the third capacitor in 4th resistor
It states in the first wiring, and
Institute is arranged in the mode being electrically connected between the first resistor device and the third capacitor in 5th resistor
It states in the second wiring.
6. breaker according to any one of claim 1 to 5, which is characterized in that
The low-pass filter includes the different multiple filter circuits of cutoff frequency, and
The multiple filter circuit is higher with the cutoff frequency of filter circuit, then electric from the processing circuit to the filter
The shorter mode of the length of the wiring on road is configured multistagely between the first resistor device and the processing circuit.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013265490A JP6343926B2 (en) | 2013-12-24 | 2013-12-24 | Breaker |
| JP2013-265490 | 2013-12-24 | ||
| PCT/JP2014/005929 WO2015097984A1 (en) | 2013-12-24 | 2014-11-27 | Breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105849850A CN105849850A (en) | 2016-08-10 |
| CN105849850B true CN105849850B (en) | 2018-11-30 |
Family
ID=53477896
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201480070782.4A Active CN105849850B (en) | 2013-12-24 | 2014-11-27 | Breaker |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP6343926B2 (en) |
| CN (1) | CN105849850B (en) |
| WO (1) | WO2015097984A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6996903B2 (en) * | 2017-08-18 | 2022-01-17 | 株式会社三共 | Pachinko machine |
| JP7087026B2 (en) * | 2020-07-13 | 2022-06-20 | 株式会社三共 | Pachinko machine |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3919565A (en) * | 1974-04-08 | 1975-11-11 | Ibm | Overcurrent sense circuit |
| JPS60135034U (en) * | 1984-02-21 | 1985-09-07 | 株式会社明電舎 | Static ground fault directional relay |
| JPH02146383U (en) * | 1989-05-17 | 1990-12-12 | ||
| JP2600534B2 (en) * | 1991-02-15 | 1997-04-16 | 三菱電機株式会社 | Ground fault detector |
| JP3006170B2 (en) * | 1991-06-28 | 2000-02-07 | 松下電工株式会社 | Notification device |
| JP3821249B2 (en) * | 1996-12-30 | 2006-09-13 | 富士電機機器制御株式会社 | Earth leakage breaker |
| JP3875167B2 (en) * | 2002-09-12 | 2007-01-31 | 三菱電機株式会社 | Noise prevention structure for electronic equipment |
| JP2005156501A (en) * | 2003-11-28 | 2005-06-16 | Japan Atom Energy Res Inst | Temperature and fluid phase determination simultaneous measurement method for multiphase field consisting of liquid and gas, and composite probe |
-
2013
- 2013-12-24 JP JP2013265490A patent/JP6343926B2/en active Active
-
2014
- 2014-11-27 CN CN201480070782.4A patent/CN105849850B/en active Active
- 2014-11-27 WO PCT/JP2014/005929 patent/WO2015097984A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| WO2015097984A1 (en) | 2015-07-02 |
| CN105849850A (en) | 2016-08-10 |
| JP6343926B2 (en) | 2018-06-20 |
| JP2015122203A (en) | 2015-07-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102810863B (en) | Self-adaptation line filter | |
| US20160245847A1 (en) | Device and method for fault current detection | |
| CN104280600A (en) | Detector and voltage converter | |
| USRE42866E1 (en) | Ground fault circuit interrupter with enhanced radio frequency interference suppression | |
| CN105849850B (en) | Breaker | |
| CN105358992B (en) | Current sensor arrangement with measuring coil | |
| US5768077A (en) | Earthing wire disconnection detection apparatus and leakage detection apparatus having an earthing wire disconnection detection function conductor | |
| JP6672605B2 (en) | Power converter | |
| JP2017118387A (en) | Noise filter | |
| US11108350B2 (en) | Electric power steering apparatus | |
| KR101033699B1 (en) | Circuit for preventing a earth leakage circuit breaker from miss-operating by high frequency | |
| JP3875167B2 (en) | Noise prevention structure for electronic equipment | |
| US11239648B2 (en) | Sensing a high frequency arc noise in an arc fault detection circuit interruption (AFCI) device | |
| US20160314894A1 (en) | Magnetic part and electric circuit | |
| TWI740303B (en) | Coupling device | |
| JP2012065461A (en) | Surge protection device protective system and surge protection system | |
| JP2017157431A (en) | Earth leakage circuit breaker | |
| JP6623229B2 (en) | Filter for converter | |
| JP2636417B2 (en) | Insulation breakdown detection circuit for instrument transformer and instrument transformer provided with the detection circuit | |
| JP6952254B2 (en) | Coupler for power line carrier communication | |
| US10396546B2 (en) | Residual current protection device | |
| KR102592448B1 (en) | Wilkinson type synthesizer and high frequency power supply | |
| US9293288B2 (en) | Method for operating an electrical apparatus and circuit breaker | |
| JP6631868B2 (en) | Leakage detection circuit | |
| TW202002534A (en) | Communication device capable of suppressing the deterioration of signal quality while reducing the influence of external interference even if a plurality of types of connection configurations are provided |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |