CN207067292U - Leakage testses circuit and leakage current detector - Google Patents
Leakage testses circuit and leakage current detector Download PDFInfo
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- CN207067292U CN207067292U CN201720487085.XU CN201720487085U CN207067292U CN 207067292 U CN207067292 U CN 207067292U CN 201720487085 U CN201720487085 U CN 201720487085U CN 207067292 U CN207067292 U CN 207067292U
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Abstract
The utility model provides a kind of leakage testses circuit and leakage current detector, is related to detection of electrical leakage technical field, wherein, leakage testses circuit includes：Transforming circuit, current rectifying and wave filtering circuit, comparison circuit, output circuit and voltmeter；Transforming circuit is used to carry out transformation to electrical leakage voltage and exported to current rectifying and wave filtering circuit；Current rectifying and wave filtering circuit is used to carry out rectifying and wave-filtering to the electrical leakage voltage after transformation；Comparison circuit is used to compared with reference voltage frequency, and by comparative result export the frequency of the electrical leakage voltage after rectifying and wave-filtering to output circuit；Output circuit shows comparative result；Voltmeter is arranged in transforming circuit, current rectifying and wave filtering circuit, comparison circuit or output circuit, electric leakage type can not be provided simultaneously by solving prior art, and the technical problem whether electrical leakage voltage frequency abnormal, reached the active electrical leakage voltage frequency of automatic prompting whether abnormal technique effect.
Description
Technical field
Detection of electrical leakage technical field is the utility model is related to, more particularly, to a kind of leakage testses circuit and leakage testses
Instrument.
Background technology
During being overhauled to power transmission sequence or electrical equipment, when Leaked Current of Line to Ground occurs, electric leakage circuit with
Ground forms loop, while has voltage generation, has electric current to flow through.This voltage can drive electrical equipment to work, with using power supply
Voltage phase difference is very few, and usual this voltage is referred to as active voltage.Measured using voltmeter or universal meter can.
But not all voltage measured by voltmeter or universal meter, electrical equipment can be driven to do work, make electricity
Gas equipment work, that is to say, that the voltage measured by voltmeter or universal meter may not have carrying load ability, generally by it is this not
The voltage that can be done work is referred to as reactive voltage, and this voltage will not drive loaded work piece, and more people will not be damaged.
But when leaking electricity, prior art can not provide electric leakage type, and current electrical leakage voltage frequency simultaneously
Whether abnormal, electric leakage type refers to active voltage and reactive voltage, maintenance personal is carried out unnecessary maintenance, or
Can not be reasonably relatively low according to the order of importance and emergency arrangement maintenance of accident order, overhaul efficiency.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of leakage testses circuit, to solve to deposit in the prior art
Electric leak detecting device can not provide simultaneously electrical leakage voltage frequency it is whether abnormal, and electric leakage is active voltage or idle
The technical problem of voltage.
In a first aspect, the utility model embodiment provides a kind of leakage testses circuit, including：Transforming circuit, rectification filter
Wave circuit, comparison circuit, output circuit and voltmeter；
Transforming circuit is used to carry out transformation to electrical leakage voltage and exported to current rectifying and wave filtering circuit；
Current rectifying and wave filtering circuit is used to carry out rectifying and wave-filtering to the electrical leakage voltage after transformation；
Comparison circuit is used for by the frequency of the electrical leakage voltage after rectifying and wave-filtering compared with reference voltage frequency, and will compare
Relatively result is exported to output circuit；
Output circuit shows comparative result；
Voltmeter is arranged in transforming circuit, current rectifying and wave filtering circuit, comparison circuit or output circuit.
With reference in a first aspect, the utility model embodiment provides the first possible embodiment of first aspect, its
In, in addition to gear selection circuit, electrical leakage voltage inputted to transforming circuit after gear selection circuit.
With reference in a first aspect, the utility model embodiment provides second of possible embodiment of first aspect, its
In, the input of gear selection circuit is also associated with fuse.
With reference in a first aspect, the utility model embodiment provides the third possible embodiment of first aspect, its
In, the gear voltage of gear selection circuit includes：2V, 127V, 220V, 380V, 660V, 1140V and 1250V.
With reference in a first aspect, the utility model embodiment provides the 4th kind of possible embodiment of first aspect, its
In, current rectifying and wave filtering circuit includes bridge rectifier, and the π type filter circuits connected with bridge rectifier, and π types filter
Circuit connects comparison circuit.
With reference in a first aspect, the utility model embodiment provides the 5th kind of possible embodiment of first aspect, its
In, output circuit exports comparative result by alarm, and alarm is preset with some alarm sounds；
Compared result is sorted out, and the comparative result after classification is carried out with alarm sound corresponding.
With reference in a first aspect, the utility model embodiment provides the 6th kind of possible embodiment of first aspect, its
In, when electrical leakage voltage is active voltage, and when the frequency of the electrical leakage voltage after rectifying and wave-filtering exceeds reference voltage frequency range,
Alarm exports the first alarm sound；
When the frequency of the electrical leakage voltage after rectifying and wave-filtering is located in the reference voltage frequency range, alarm output the
Two alarm sounds.
With reference in a first aspect, the utility model embodiment provides the 7th kind of possible embodiment of first aspect, its
In, when electrical leakage voltage is reactive voltage, alarm is in off working state.
With reference in a first aspect, the utility model embodiment provides the 8th kind of possible embodiment of first aspect, its
In, reference voltage frequency range is 45-60Hz.
Second aspect, the utility model embodiment also provides a kind of leakage current detector, including first aspect and its possibility are in fact
Apply the leakage testses circuit described in mode.
The utility model embodiment brings following beneficial effect：
The leakage testses circuit that the utility model embodiment provides carries out transformation and defeated by transforming circuit to electrical leakage voltage
Go out to current rectifying and wave filtering circuit；Rectifying and wave-filtering is carried out to the electrical leakage voltage after transformation by current rectifying and wave filtering circuit；Pass through comparison circuit
By the frequency of the electrical leakage voltage after rectifying and wave-filtering compared with reference voltage frequency, and comparative result is exported to output electricity
Road；Last output circuit shows comparative result.Shown accordingly according to comparative result, both given electric leakage class
Type, and whether being shown extremely to electrical leakage voltage frequency, facilitate to the detection of electrical leakage of power transmission network and electrical equipment with
Maintenance.
Other feature and advantage of the present utility model will illustrate in the following description, also, partly from specification
In become apparent, or understood by implementing the utility model.The purpose of this utility model and other advantages are illustrating
Specifically noted structure is realized and obtained in book, claims and accompanying drawing.
To enable above-mentioned purpose of the present utility model, feature and advantage to become apparent, preferred embodiment cited below particularly, and
Accompanying drawing appended by cooperation, is described in detail below.
Brief description of the drawings
, below will be right in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
The required accompanying drawing used is briefly described in embodiment or description of the prior art, it should be apparent that, describe below
In accompanying drawing be some embodiments of the present utility model, for those of ordinary skill in the art, do not paying creativeness
On the premise of work, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the schematic diagram for the leakage testses circuit that the utility model embodiment 1 provides；
Fig. 2 is a kind of schematic diagram of the preferred embodiment for the leakage testses circuit that the utility model embodiment 1 provides；
Fig. 3 is a kind of circuit diagram of the preferred embodiment for the leakage testses circuit that the utility model embodiment 1 provides；
Fig. 4 is the schematic diagram of another preferred embodiment for the leakage testses circuit that the utility model embodiment 1 provides；
Fig. 5 is the schematic diagram for the leakage current detector that the utility model embodiment 2 provides；
Fig. 6 is the flow chart for the leakage current detector application method that the utility model embodiment 2 provides.
Icon：1- leakage testses circuits；10- gear selection circuits；11- transforming circuits；12- current rectifying and wave filtering circuits；13- ratios
Compared with circuit；14- output circuits；15- reference voltage frequency input circuits；2- display screens.
Embodiment
To make the purpose, technical scheme and advantage of the utility model embodiment clearer, below in conjunction with accompanying drawing to this
The technical scheme of utility model is clearly and completely described, it is clear that described embodiment is that the utility model part is real
Apply example, rather than whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making
The every other embodiment obtained under the premise of creative work, belong to the scope of the utility model protection.
Current leakage testses circuit can not provide electrical leakage quantity simultaneously, and electric leakage is active voltage or reactive voltage,
Based on this, a kind of leakage testses circuit and leakage current detector that the utility model embodiment provides, electrical leakage quantity can be provided simultaneously
And electric leakage type.
For ease of understanding the present embodiment, first to a kind of leakage testses electricity disclosed in the utility model embodiment
Road describes in detail.
Embodiment 1
As shown in figure 1, a kind of leakage testses circuit, including：Transforming circuit 11, current rectifying and wave filtering circuit 12, comparison circuit 13,
Output circuit 14 and voltmeter V；Transforming circuit 11 is used to carry out transformation to electrical leakage voltage and exported to current rectifying and wave filtering circuit 12；It is whole
Filter circuit 12 is flowed to be used to carry out rectifying and wave-filtering to the electrical leakage voltage after transformation；Comparison circuit 13 is used for the leakage after rectifying and wave-filtering
The frequency of piezoelectric voltage is exported to output circuit 14 compared with reference voltage frequency, and by comparative result；Output circuit 14 is aobvious
Show comparative result；Voltmeter V is arranged in transforming circuit 11, current rectifying and wave filtering circuit 12, comparison circuit 13 or output circuit 14.
The present embodiment carries out transformation to electrical leakage voltage by transforming circuit and exported to current rectifying and wave filtering circuit；Filtered by rectification
Wave circuit carries out rectifying and wave-filtering to the electrical leakage voltage after transformation；By comparison circuit by the frequency of the electrical leakage voltage after rectifying and wave-filtering
Exported compared with reference voltage frequency, and by comparative result to output circuit；Last output circuit shows comparative result
Out.Shown accordingly according to comparative result, both given electric leakage type, and electrical leakage voltage frequency is shown,
Facilitate detection of electrical leakage and the maintenance to power transmission network and electrical equipment.
As shown in Figures 2 and 3, the another embodiment as the present embodiment, in addition to gear selection circuit 10, electric leakage
Voltage is inputted to transforming circuit 11 after gear selection circuit 10.Transforming circuit 11 includes primary induction coil L1, iron core and secondary
Level induction coil L2.
Gear selection circuit 10 includes some gear on-offs, and different gear on-offs connects primary according to different magnitudes of voltage
The diverse location of coil.The voltage gear of gear selection circuit 10 in the present embodiment be preferably but not limited to 2V, 127V, 220V,
380V, 660V, 1140V and 1250V, the detection of electrical leakage of common power transmission network and electrical equipment can be met, can when specifically used
Configured accordingly with the utilization voltage scope according to detection object.
In order to improve the security of detection of electrical leakage, the input of the gear selection circuit 10 of the present embodiment is also associated with insuring
Silk FUSE, i.e. leakage current enter gear selection circuit 10 after fuse FUSE.If transmission line of electricity or electrical equipment are because of short circuit
And there is high current, or because other situations occur electric current exceed fuse rated current when, blowout is other to protect
Circuit.
It should be noted that the voltmeter V of such a embodiment can be arranged at the input of gear selection circuit 10.
Current rectifying and wave filtering circuit 12 in the present embodiment includes bridge rectifier, and the π to be connected with bridge rectifier
Type filter circuit, and π types filter circuit connection comparison circuit.
First pass through bridge rectifier to electrical leakage voltage carry out full-wave rectification, then by π type filter circuits to rectification after
Electrical leakage voltage be filtered, and the electrical leakage voltage after rectifying and wave-filtering is exported to comparison circuit.
Comparison circuit 13 in the present embodiment uses existing comparable chip, by the frequency of the electrical leakage voltage after filter rectification
Compared with reference voltage frequency range, the reference voltage frequency range in the present embodiment can be fixed reference voltage frequency
Rate, such a embodiment, comparison circuit 13 is simple in construction, and is directly compared, speed.It should be noted that this
Reference voltage frequency range in embodiment can only have an electric voltage frequency value.
As shown in figure 4, the comparison circuit 13 in the present embodiment is preferably also connected with reference voltage frequency range input circuit, connect
The reference voltage frequency range that is manually entered of user is received, and sends it to comparison circuit 13, comparison circuit 13 is by rectifying and wave-filtering
The frequency of electrical leakage voltage afterwards is compared with the reference voltage frequency range received, and such a embodiment, flexibility is strong, user
Rule of thumb reference voltage frequency range can be changed with detection scene.
As an embodiment of the present embodiment, output circuit 14 shows comparative result, alarm bag by alarm
Include some alarm sounds；Compared result is sorted out, and the comparative result after classification is carried out with alarm sound corresponding.Specifically
For：
When electrical leakage voltage is active voltage, and the frequency of electrical leakage voltage after rectifying and wave-filtering exceeds reference voltage frequency model
When enclosing, alarm exports the first alarm sound；The frequency of electrical leakage voltage after rectifying and wave-filtering is located at reference voltage frequency range
When interior, alarm exports the second alarm sound.
Active voltage can drive electrical equipment to work, and therefore, when electric leakage is active voltage, knot is compared in different classification
Fruit is exported by the alarm sound of different alarms.Meanwhile voltmeter V displays that electrical leakage voltage value.
Reactive voltage can not drive electrical equipment to work, and therefore, when electric leakage is reactive voltage, alarm is in inoperative
State, but now voltmeter has electrical leakage voltage value.
It should be noted that when in transmission line of electricity without electric leakage, voltmeter no-voltage value, while alarm also alarm
Sound.
In addition, the output circuit of the present embodiment also includes indicator lamp, the state of indicator lamp and the alarm sound pair of alarm
Should, it is specially：
When electric leakage is active voltage, and the frequency of electrical leakage voltage after rectifying and wave-filtering exceeds reference voltage frequency range
When, the alarm sound of alarm is the first alarm sound, and now indicator lamp shows the first color；Electric leakage after rectifying and wave-filtering
When the frequency of voltage is located in reference voltage frequency range, alarm exports the second alarm sound, and now indicator lamp shows second
Kind color.
When electric leakage is reactive voltage, alarm is in off working state, and indicator lamp is also at off working state, voltmeter
Show electrical leakage voltage value.
When transmission line of electricity or electrical equipment are without electric leakage, alarm, indicator lamp are in off working state, while voltmeter
No-voltage value.
The first alarm sound in the present embodiment can be distinguished with the second alarm sound by frequency or broadcasting content,
The present embodiment is preferably distinguished by frequency, is specially：The frequency of first alarm sound is higher than the second alarm sound.
Preferably, the frequency of alarm sound is related to electrical leakage voltage frequency linearity, i.e., can be with by the frequency of alarm sound
Current electrical leakage voltage frequency is directly released, when electrical leakage voltage frequency substantially exceeds reference voltage frequency range, staff can
There is exception to be easy to tell electrical leakage voltage frequency, and take leak current fault effective maintenance rapidly.
Embodiment 2
Present embodiments provide a kind of leakage current detector, including the leakage testses circuit 1 described in embodiment 1.
As shown in figure 5, the leakage current detector in the present embodiment also includes display screen 2, the display for electrical leakage voltage.
The present embodiment preferably also includes reference voltage frequency input circuit 15, for input reference voltage frequency, with reference to electricity
Voltage-frequency rate input circuit 15 can be such that staff is rule of thumb configured with detection scene to reference voltage frequency.
The leakage current detector that the utility model embodiment provides, the leakage testses circuit provided with above-described embodiment have phase
Same technical characteristic, so can also solve identical technical problem, reaches identical technique effect.
As shown in fig. 6, the present embodiment additionally provides a kind of application method of leakage current detector, comprise the following steps：
S1. suitable voltage gear is selected according to power utilization environment.
Gear voltage in the present embodiment is preferably but not limited to 2V, 127V, 220V, 380V, 660V, 1140V and 1250V.
S2. black line is connected with ground wire, red line is put at detection of electrical leakage.
As shown in figure 3, black line at B is connected with ground wire, A ends red line is put at detection of electrical leakage.Electric leakage in this step
Can be at detection at the detection of electrical leakage of transmission line of electricity or at the detection of electrical leakage of electrical equipment, such as the sense of relay
Coil or switch is answered to be possible to leak electricity, therefore this is likely to become at the detection of electrical leakage described in the present embodiment at two.
S3. circuit is connected, and according to the output information of output circuit, judges that type of leaking electricity, and electrical leakage voltage frequency are
It is no normal.
When alarm sends the first alarm sound, indicator lamp is red, then illustrates that electrical leakage voltage frequency exceeds reference voltage
Frequency range.Now in time corresponding measure should be taken to overhaul leak current fault.
When alarm sends the second alarm sound, indicator lamp is yellow, then illustrates electrical leakage voltage frequency in reference voltage frequency
In the range of rate.
When alarm, indicator lamp are in off working state, and voltmeter has registration, illustrates that electric leakage is reactive voltage.
When alarm, indicator lamp are in off working state, and voltmeter is also without registration, then explanation is without electrical leakage voltage.
In the description of the utility model embodiment, unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected；Can
To be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected by intermediary, Ke Yishi
The connection of two element internals.For the ordinary skill in the art, with concrete condition above-mentioned term can be understood at this
Concrete meaning in utility model.
, it is necessary to explanation in description of the present utility model, term " " center ", " on ", " under ", it is "left", "right", " perpendicular
Directly ", the orientation of the instruction such as " level ", " interior ", " outer " or position relationship are based on orientation shown in the drawings or position relationship, are only
Described for the ease of description the utility model and simplifying, rather than instruction or imply signified device or element must have it is specific
Orientation, with specific azimuth configuration and operation, therefore it is not intended that to limitation of the present utility model.In addition, term " the
One ", " second ", " the 3rd " are only used for describing purpose, and it is not intended that instruction or hint relative importance.
Finally it should be noted that：Embodiment described above, only specific embodiment of the present utility model, to illustrate this
The technical scheme of utility model, rather than its limitations, the scope of protection of the utility model is not limited thereto, although with reference to foregoing
The utility model is described in detail embodiment, it will be understood by those within the art that：It is any to be familiar with this skill
For the technical staff in art field in the technical scope that the utility model discloses, it still can be to the skill described in previous embodiment
Art scheme is modified or can readily occurred in change, or carries out equivalent substitution to which part technical characteristic；And these modifications,
Change is replaced, and the essence of appropriate technical solution is departed from the spirit and model of the utility model embodiment technical scheme
Enclose, should all cover within the scope of protection of the utility model.Therefore, the scope of protection of the utility model described should be wanted with right
The protection domain asked is defined.
Claims (10)
- A kind of 1. leakage testses circuit, it is characterised in that including：Transforming circuit, current rectifying and wave filtering circuit, comparison circuit, output electricity Road, reference voltage frequency range input circuit and voltmeter；The transforming circuit is used to carry out transformation to electrical leakage voltage and exported to the current rectifying and wave filtering circuit；The current rectifying and wave filtering circuit is used to carry out rectifying and wave-filtering to the electrical leakage voltage after transformation；The comparison circuit receives the reference voltage frequency transmitted by the reference voltage frequency range input circuit；The comparison circuit is used for by the frequency of the electrical leakage voltage after rectifying and wave-filtering compared with the reference voltage frequency, and Comparative result is exported to the output circuit；The output circuit shows the comparative result；The voltmeter is arranged at the transforming circuit, the current rectifying and wave filtering circuit, the comparison circuit or the output circuit In.
- 2. leakage testses circuit according to claim 1, it is characterised in that also including gear selection circuit, the electric leakage Voltage is inputted to the transforming circuit after the gear selection circuit.
- 3. leakage testses circuit according to claim 2, it is characterised in that the input of the gear selection circuit also connects It is connected to fuse.
- 4. leakage testses circuit according to claim 3, it is characterised in that the gear voltage bag of the gear selection circuit Include：2V, 127V, 220V, 380V, 660V, 1140V and 1250V.
- 5. leakage testses circuit according to claim 1, it is characterised in that the current rectifying and wave filtering circuit includes bridge rectifier Circuit, and the π type filter circuits connected with the bridge rectifier, and the π types filter circuit connection comparison is electric Road.
- 6. leakage testses circuit according to claim 1, it is characterised in that the output circuit is exported by alarm The comparative result, the alarm are preset with several alarm sound；The comparative result is sorted out, and the comparative result after classification carried out with the alarm sound corresponding.
- 7. leakage testses circuit according to claim 6, it is characterised in that when the electrical leakage voltage is active voltage, and When the frequency of the electrical leakage voltage after the rectifying and wave-filtering exceeds the reference voltage frequency range, the alarm output first Alarm sound；When the frequency of the electrical leakage voltage after the rectifying and wave-filtering is located in the reference voltage frequency range, the alarm is defeated Go out the second alarm sound.
- 8. leakage testses circuit according to claim 7, it is characterised in that when the electrical leakage voltage is reactive voltage, The alarm is in off working state.
- 9. leakage testses circuit according to claim 8, it is characterised in that the reference voltage frequency range is 45- 60Hz。
- 10. a kind of leakage current detector, it is characterised in that including the leakage testses circuit described in claim any one of 1-9.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720487085.XU CN207067292U (en) | 2017-05-04 | 2017-05-04 | Leakage testses circuit and leakage current detector |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720487085.XU CN207067292U (en) | 2017-05-04 | 2017-05-04 | Leakage testses circuit and leakage current detector |
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| Publication Number | Publication Date |
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| CN207067292U true CN207067292U (en) | 2018-03-02 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107015101A (en) * | 2017-05-04 | 2017-08-04 | 中领世能（天津）科技有限公司 | Leakage testses circuit and leakage current detector |
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- 2017-05-04 CN CN201720487085.XU patent/CN207067292U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107015101A (en) * | 2017-05-04 | 2017-08-04 | 中领世能（天津）科技有限公司 | Leakage testses circuit and leakage current detector |
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