CN109245042A - Electric leakage detecting and warning device - Google Patents
Electric leakage detecting and warning device Download PDFInfo
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- CN109245042A CN109245042A CN201811293431.6A CN201811293431A CN109245042A CN 109245042 A CN109245042 A CN 109245042A CN 201811293431 A CN201811293431 A CN 201811293431A CN 109245042 A CN109245042 A CN 109245042A
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- electric leakage
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Classifications
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- 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
- H02H3/325—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 involving voltage comparison
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- 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
- H02H3/04—Details with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned
Abstract
The present invention discloses a kind of electric leakage detecting and warning device, the device includes electric-leakage detection circuit, control circuit and warning circuit, the test side of electric-leakage detection circuit is used to connect the shell of tested equipment, and the output end of electric-leakage detection circuit and the input terminal of control circuit connect；The control terminal of control circuit and the input terminal of warning circuit connect；Electric-leakage detection circuit includes voltage detecting circuit, for detecting the voltage of tested equipment shell, and the output detection level signal when the voltage for detecting tested equipment shell is greater than preset safeguard protection voltage；Electric leakage signal output circuit for triggering according to detection level signal, and exports detection of electrical leakage signal；Control circuit is alerted for controlling warning circuit according to detection of electrical leakage signal.The present invention realizes accurate detect and is detected whether the electrical leakage voltage of shell is more than safeguard protection voltage, takes care when reminding pedestrian to pass by electric leakage equipment.
Description
Technical field
The present invention relates to electrical equipments to protect field, in particular to a kind of electric leakage detecting and warning device.
Background technique
For outdoor low voltage equipment due to installation strength and safe and reliable requirement, shell is all using intermetallic composite coating system at present
Made of work.The power supply of outdoor equipment is provided by forceful electric power, and forceful electric power is directly sent in installs case, if once enclosure interior
Equipment is damaged and leak electricity because of insulation ag(e)ing, when metal shell earthing failure, or when being not carried out effective ground connection,
When thering are personnel to touch metal shell, it will bring security risk to the personnel.
Summary of the invention
The main object of the present invention is to propose a kind of electric leakage detecting and warning device, it is intended to which accurately personal safety is arrived in protection.
To achieve the above object, a kind of electric leakage detecting and warning device proposed by the present invention, comprising: electric-leakage detection circuit, control
Circuit and warning circuit processed, the test side of the electric-leakage detection circuit are used to connect the shell of the tested equipment, the leakage
The output end of power detection circuit is connect with the input terminal of the control circuit；The control terminal of the control circuit and alarm electricity
The input terminal on road connects；
Wherein, the electric-leakage detection circuit includes:
Voltage detecting circuit, the test side of the voltage detecting circuit are the test side of the electric-leakage detection circuit；It is described
Voltage detecting circuit for detecting the voltage of the tested equipment shell, and is detecting the tested equipment shell
Output detection level signal when voltage is greater than preset safeguard protection voltage；
Electric leakage signal output circuit, the output of the input terminal and the voltage detecting circuit of the electric leakage signal output circuit
End connection, the output end of the electric leakage signal output circuit are the output end of the electric-leakage detection circuit；The electric leakage signal is defeated
Circuit out for triggering according to the detection level signal, and exports detection of electrical leakage signal；
The control circuit is alerted for controlling the warning circuit according to the detection of electrical leakage signal.
Optionally, the voltage detecting circuit include the first power supply, test side, zero line side, first resistor, second resistance,
3rd resistor, the 4th resistance and photoelectrical coupler；
The first end of the first end of the first resistor, the first end of second resistance and 3rd resistor respectively with the detection
End connection, the second end of the second end of the first resistor, the second end of second resistance and 3rd resistor respectively with the photoelectricity
The primary side input terminal of coupler connects；The primary side output end of the photoelectrical coupler is connect with the zero line side, the photoelectricity coupling
The input terminal on the secondary side of clutch is connect through the 4th resistance with the first power supply, and the output end on the secondary side of the photoelectrical coupler is
The output end of the voltage detecting circuit.
Optionally, the voltage detecting circuit further includes first diode and the 5th resistance；
The primary side output end of the first end of the anode of the first diode and the 5th resistance, the photoelectrical coupler
Interconnection, the second end of the cathode of the first diode and the first resistor, the second end of second resistance, 3rd resistor the
The interconnection of the primary side input terminal of two ends and the photoelectrical coupler；The second end of five resistance is connect with the zero line side.
Optionally, the electric leakage signal output circuit further includes power circuit, charge-discharge circuit and switching circuit；
The input terminal of the charge-discharge circuit is the input terminal of electric leakage signal output circuit, the output of the charge-discharge circuit
End is connect with the controlled end of the switching circuit, and the input terminal of the switching circuit is connect with the output end of the power circuit,
The output end of the switching circuit is the output end of electric leakage signal output circuit；Wherein,
The charge-discharge circuit, the detection level signal control switch for being exported according to the voltage detecting circuit
Circuit conducting；
The switching circuit, the power supply signal output in conducting, the power circuit to be exported are used as the leakage
Power detection signal.
Optionally, the charge-discharge circuit includes the 6th resistance and first capacitor；
The first end interconnection of the first end and the first capacitor of 6th resistance, and the common end after interconnection is described
The input terminal of charge-discharge circuit, the second end interconnection of the second end and the first capacitor of the 6th resistance, and after interconnection
Common end is the output end of the charge-discharge circuit.
Optionally, the switching circuit includes first switch tube, second switch, third switching tube, the 7th resistance, the 8th
Resistance and the 9th resistance, the first switch tube, second switch, third switching tube all have the first connecting pin, the second connection
End and controlled end；
The controlled end of the first switch tube be switching circuit controlled end, the second connection end of the first switch tube with
The second end interconnection of the controlled end of second switch, the controlled end of third switching tube, the 7th resistance；The of the third switching tube
Two connecting pins, the first end of the 7th resistance, the interconnection of the first end of the 9th resistance, and the common end interconnected is the switching circuit
Input terminal；First connecting pin of the second switch and the first connecting pin of third switching tube, the first end of the 8th resistance, the
The second end of nine resistance interconnects, and the common end interconnected is the output end of the switching circuit；The first of the first switch tube
Connecting pin, the second connection end of second switch, the second end of the 8th resistance are grounded respectively.
Optionally, the control circuit includes electric leakage signal acquisition module, relay module and communication module；Wherein,
The electric leakage signal acquisition module includes power input, power output end, detection of electrical leakage signal receiving end and connects
Ground terminal, the power input are the input terminal of the control circuit, the electricity of the power output end and the relay module
The connection of source receiving end, the detection of electrical leakage signal receiving end are connect with the output end of the electric leakage signal output circuit；It is described after
The control terminal of electrical appliance module is connect with the input terminal of the warning circuit；The communication module is that the electric leakage of the control circuit is examined
Survey signal output end.
Optionally, the warning circuit includes alarm；
The input terminal of the alarm is the input terminal of warning circuit, the output end of the alarm and the electric leakage signal
The ground terminal of acquisition module connects, and the control circuit is by the on/off of control relay module to control the warning circuit
Alarm triggering.
Optionally, the control circuit further includes ethernet module；
The input terminal of the ethernet module is connect with the output end of the communication module, and the ethernet module is used for
The received detection of electrical leakage signal of the control circuit is uploaded into monitor supervision platform.
Optionally, the control circuit further includes wireless network module；
The input terminal of the wireless network module is connect with the output end of the communication module, the wireless network module,
For the received detection of electrical leakage signal of the control circuit to be uploaded to monitor supervision platform.
Technical solution of the present invention passes through setting electric-leakage detection circuit, control circuit and warning circuit, the detection of electrical leakage electricity
Road includes voltage detecting circuit and electric leakage signal output circuit, and in the device, the test side of the electric-leakage detection circuit connects institute
The shell of tested equipment is stated, the output end of the electric-leakage detection circuit is connect with the input terminal of the control circuit, the control
The control terminal of circuit processed is connect with the input terminal of the warning circuit, and the test side of the voltage detecting circuit is electric leakage inspection
The test side of slowdown monitoring circuit for detecting the voltage of the tested equipment shell, and is detecting the tested equipment shell
Voltage be greater than preset safeguard protection voltage when output detection level signal, the input terminal of the electric leakage signal output circuit with
The output end of the voltage detecting circuit connects, and the output end of the electric leakage signal output circuit is the electric-leakage detection circuit
Output end for triggering according to the detection level signal, and exports detection of electrical leakage signal, and the control circuit is used for according to institute
The detection of electrical leakage signal control warning circuit is stated to be alerted.And then realize the accurate electrical leakage voltage for detecting and being detected shell
Whether it is more than safeguard protection voltage, takes care when reminding pedestrian to pass by electric leakage equipment.
Detailed description of the invention
It, below will be to embodiment or existing in order to illustrate more clearly of inventive embodiments or technical solution in the prior art
Attached drawing needed in technical description is briefly described, it should be apparent that, the accompanying drawings in the following description is only this hair
Bright some embodiments for those of ordinary skill in the art without creative efforts, can be with root
Other attached drawings are obtained according to the structure shown in these attached drawings.
Fig. 1 is the functional block diagram of one embodiment of electric leakage detecting and warning device of the present invention；
Fig. 2 is the functional block diagram of one embodiment of this present invention electric-leakage detection circuit；
Fig. 3 is the functional block diagram of one embodiment of electric leakage signal output circuit of the present invention；
Fig. 4 is the electrical block diagram of one embodiment of electric-leakage detection circuit of the present invention；
Fig. 5 is the electrical block diagram of one embodiment of electric leakage detecting and warning device of the present invention；
Fig. 6 is the electrical block diagram of power circuit in Fig. 3.
Drawing reference numeral explanation:
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiment is only a part of the embodiments of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts it is all its
His embodiment, shall fall within the protection scope of the present invention.
It is to be appreciated that if relating to directionality instruction (such as up, down, left, right, before and after ...) in the embodiment of the present invention,
Then directionality instruction be only used for explain under a certain particular pose (as shown in the picture) between each component relative positional relationship,
Motion conditions etc., if the particular pose changes, directionality instruction is also correspondingly changed correspondingly.
In addition, being somebody's turn to do " first ", " second " etc. if relating to the description of " first ", " second " etc. in the embodiment of the present invention
Description be used for description purposes only, be not understood to indicate or imply its relative importance or implicitly indicate indicated skill
The quantity of art feature." first " is defined as a result, the feature of " second " can explicitly or implicitly include at least one spy
Sign.It in addition, the technical solution between each embodiment can be combined with each other, but must be with those of ordinary skill in the art's energy
It is enough realize based on, will be understood that the knot of this technical solution when conflicting or cannot achieve when occurs in the combination of technical solution
Conjunction is not present, also not the present invention claims protection scope within.
Whether the present invention proposes a kind of electric leakage detecting and warning device, leak electricity in use for detecting electrical equipment,
And then reminded by electric leakage, to guarantee personal safety.
In an embodiment of the invention, as shown in Figure 1, the electric leakage detecting and warning device include electric-leakage detection circuit 200,
Control circuit 300 and warning circuit 400.
In the present embodiment, the test side of electric-leakage detection circuit 200 is used to connect the shell of tested equipment, tested equipment
It can be, but not limited to be outdoor low pressure cabinet equipment；The output end of electric-leakage detection circuit 200 and the input terminal of control circuit 300
Connection, the control terminal of control circuit 300 connect with the input terminal of warning circuit 400, wherein control circuit 300 can with but it is unlimited
In serving as control circuit by outdoor low pressure cabinet equipment, warning circuit 400 be can be including alarm.
In one embodiment, as shown in Fig. 2, may include voltage detecting circuit 210 and leakage in electric-leakage detection circuit 200
Electrical signal output circuitry 220；The test side of voltage detecting circuit 210 is the test side of electric-leakage detection circuit 200, voltage detecting electricity
Road 210 is used to detect the voltage of tested equipment shell, and is greater than preset peace in the voltage for detecting tested equipment shell
Output detection level signal when full guard voltage, the input terminal of electric leakage signal output circuit 220 are defeated with voltage detecting circuit 210
Outlet connection, the output end of electric leakage signal output circuit 220 are the output end of electric-leakage detection circuit 200, electric leakage signal output electricity
Road 220 exports detection of electrical leakage signal according to detection level signal triggering；Control circuit 300 is used for according to the detection of electrical leakage
Signal controls the warning circuit 400 and is alerted.
In the present embodiment, preset safeguard protection voltage can be 36V and its hereinafter, such as 30V, 32V, 24V, herein
Unlimited, since 36V is human safety voltage, safeguard protection voltage is set as 36V, it is ensured that human body will not come to harm.It can
With understanding, casing is touched when the firewire of the power supply line of outdoor crate equipment accidentally falls off, and the ground connection of casing
Row's protecting field does not have effective grounding again when, electrical leakage voltage will be generated on casing, or since equipment location is often rained
Or it is moist, cause outdoor crate to be intake, when leaking off to power supply signal on casing, can also generate electrical leakage voltage.The present embodiment
In, the voltage of the tested equipment shell is detected by voltage detecting circuit 210 in electric-leakage detection circuit 200, and detecting
To the tested equipment shell voltage be greater than preset safeguard protection voltage when output detection level signal, then electric leakage letter
Number output circuit 220 is triggered according to the detection level signal, and exports detection of electrical leakage signal, 300 basis of control circuit
The detection of electrical leakage signal controls the warning circuit 400 and is alerted, and takes care when reminding pedestrian to pass by electric leakage equipment,
Maintenance personal is set to find that electric leakage repairs in time simultaneously also by prompting.
In one embodiment, as shown in figure 4, voltage detecting circuit 210 includes first resistor R1, second resistance R2, third
Resistance R3, the 4th resistance R4 and photoelectrical coupler D1；First resistor R1, second resistance R2 and 3rd resistor R3 are mutually in parallel, the
The first end of the first end of one resistance R1, the first end of second resistance R2 and 3rd resistor R3 is connect with the test side respectively,
Tie point is a common end, the second end of the second end of first resistor R1, the second end of second resistance R2 and 3rd resistor R3
It is connect respectively with the primary side input terminal of the photoelectrical coupler D1, tie point is a common end；The photoelectrical coupler D1's
Primary side output end is connect with the zero line side, and the input terminal on the secondary side of the photoelectrical coupler D1 is through the 4th resistance R4 and
The connection of one power supply, the output end on the secondary side of the photoelectrical coupler D1 are the output end of the voltage detecting circuit 210.Wherein,
Test side can be the earthing bar protecting field of access tested equipment shell, it is to be understood that earthing bar protecting field is will just
It is not charged in normal situation, and after insulating materials damage or other may electrification metal part conducting wire and grounding body
A kind of mode for the protection wiring being reliably connected.Zero line side can be the zero of the power supply AC220V of tested equipment
Line, the first power supply can provide voltage by its normal work for the secondary side of photoelectrical coupler D1.
Further, the voltage detecting circuit 210 further includes first diode VD1 and the 5th resistance R5, and described first
The primary side output end interconnection of the first end of the anode of diode VD1 and the 5th resistance R5, the photoelectrical coupler D1, it is described
The second end of the cathode of first diode VD1 and the first resistor R1, the second end of second resistance R2,3rd resistor R3 the
The interconnection of the primary side input terminal of two ends and the photoelectrical coupler D1, the second end of the five resistance R5 are connect with the zero line side.
Wherein, there are a connection terminal, the second electricity between the second end of first resistor R1 and the cathode of first diode VD1
Hinder the second end and first for having a connection terminal, 3rd resistor R3 between the second end of R2 and the cathode of first diode VD1
Have a connection terminal between the cathode of diode VD1, connection terminal here, which is equivalent to, to be directly connected, normal use when
Time is to connect short circuit cap, is equivalent to a conducting wire, different resistance is selected by connection terminal, or can select entirely, is suitable for not
Used when with voltage, it is to be understood that different resistance here can be, but not limited to be three resistance, three resistance it
Between forming circuit in parallel, the resistance on each cable run connects forming circuit with photoelectrical coupler D1.
In the present embodiment, it should be noted that first resistor R1, second resistance R2,3rd resistor R3 and photoelectrical coupler
D1 forms voltage detecting circuit 210 while realizing equipment leakage voltage detecting, can be real by reasonable disposition component parameters
The detection of existing target voltage, is equivalent to and a safe threshold is arranged for voltage detecting circuit 210, it can is to preset a human body
Safeguard protection voltage 36V, when the upper electrical leakage voltage of the detected shell of outdoor crate equipment is greater than default human-body safety protection
When voltage 36V, photoelectrical coupler D1 can be just connected by driving；When the upper electrical leakage voltage of the detected shell of outdoor crate equipment
When protecting voltage 36V less than default human-body safety, photoelectrical coupler D1 is then in an off state.
In the present embodiment, it is also necessary to which explanation, the electrical leakage voltage on apparatus casing may be DC voltage, it is also possible to
Alternating voltage, the present embodiment may be implemented to detect using photoelectrical coupler D1.
For example, then the signal of test side input is alternating voltage when the electrical leakage voltage on apparatus casing is alternating voltage
Signal, the ac voltage signal flow to photoelectrical coupler D1's after first resistor R1, second resistance R2,3rd resistor R3
Primary side, photoelectrical coupler D1 primary side LED operation generate optical signal and are transferred to secondary side, thus the pair of photoelectrical coupler D1
Output electric signal is opened on side, this electric signal characterizes electric leakage signal, that is, realizes the detection of electrical leakage voltage.
When the electrical leakage voltage on apparatus casing is DC voltage, then the signal of test side input is d. c. voltage signal,
DC voltage does not have phase change, and therefore, when detecting electric leakage signal, the primary side of photoelectrical coupler D1 works always and exports
Electrical leakage voltage signal.
It should be noted that can not only realize the detection of electrical leakage voltage signal using photoelectrical coupler D1, and can
Realization electrical leakage voltage mesohigh is isolated with low pressure.
Certainly, in other embodiments, photoelectrical coupler D1 can also be realized using other switching circuit replacements, such as
The switching circuit that triode, IGBT or metal-oxide-semiconductor are realized.
In one embodiment, referring to as shown in Figure 3 and Figure 4, electric leakage signal output circuit 220 includes power circuit 223, fills
Discharge circuit 221 and switching circuit 222；The input terminal of the charge-discharge circuit 221 is the input of electric leakage signal output circuit 220
End；It connect with the output end of voltage detecting circuit 210, namely is connect with the secondary side output end of photoelectrical coupler D1, receive voltage
The detection level signal that detection circuit 210 exports；The output end of the charge-discharge circuit 221 and the switching circuit 222 by
End connection is controlled, the input terminal of the switching circuit 222 is connect with the output end of the power circuit 223, the switching circuit 222
Output end be electric leakage signal output circuit 220 output end.Electric leakage signal output circuit 220 is triggered by detection level signal
To reach output detection of electrical leakage signal.
In one embodiment, as shown in figure 4, the charge-discharge circuit 221 includes the 6th resistance R6 and first capacitor C1；Institute
The first end interconnection of the 6th resistance R6 and first capacitor C1 is stated, and the common end after interconnection is the charge-discharge circuit 221
Input terminal, the second end interconnection of the second end of the 6th resistance R6 and the first capacitor C1, and the common end after interconnecting
For the output end of the charge-discharge circuit.
In the present embodiment, the 6th resistance R6 and the first capacitor C1 one charge-discharge circuit of formation parallel with one another,
Charge and discharge process can be formed, voltage is generated.Wherein, when the voltage that voltage detecting circuit 210 inputs is alternating voltage, due to handing over
Galvanic electricity is to make at any time periodically variable, and when the phase of alternating current is positive, photoelectrical coupler D1 output signal is being exchanged
When the phase of electricity is reversed, photoelectrical coupler D1 stops output signal, then it is conductive and nonconductive to have resulted in photoelectrical coupler D1
It toggles.The electric signal of so photoelectrical coupler D1 output is exactly to switch between low and high level according to some cycles, also
It is to say, charge-discharge circuit 221 carries out energy storage when receiving the electric signal of photoelectrical coupler D1 output, and in energy storage certain voltage
When, the trigger signal opened for switching circuit 222 is provided.When switching circuit 222 is opened, power circuit 223 is exported
Power supply signal output, using as detection of electrical leakage signal.
When the DC voltage for being greater than human-body safety protection voltage 36V that voltage detecting circuit 210 inputs, photoelectrical coupler
D1 is then constantly on state, that is to say, that photoelectrical coupler D1 has always output signal, and switching circuit 222 is constantly in
Open state when discharge process is also not present in the 6th resistance R6 and the first capacitor C1, just provides always one for opening
The trigger signal that powered-down road 222 is opened.At this point, the power supply signal for exporting power circuit 223 is defeated when switching circuit 222 is opened
Out, using as detection of electrical leakage signal.
Through the foregoing embodiment, the detection level signal exported using voltage detecting circuit 210, so that charge-discharge circuit
221 provide a trigger signal, to realize the conducting of control switch circuit 222.
In one embodiment, as shown in figure 4, the switching circuit 222 includes first switch tube VT1, second switch
VT2, third switching tube VT3, the 7th resistance R7, the 8th resistance R8 and the 9th resistance R9；The controlled end of the first switch tube VT1
It is that the controlled end of first switch tube VT1 is connect with the output end of charge-discharge circuit 221 for the controlled end of switching circuit 222；Institute
State the second connection end of first switch tube VT1 and the controlled end of second switch VT2, the controlled end of third switching tube VT3, the 7th
The second end of resistance R7 interconnects, second connection end, the first end of the 7th resistance R7, the 9th resistance of the third switching tube VT3
The first end of R9 interconnects, and the common end interconnected is the input terminal of the switching circuit 222, further, third switching tube VT3
Second connection end, the first end of the 7th resistance R7, the common end of the first end of the 9th resistance R9 interconnection and power circuit 223
Output end connection；The first connecting pin of the second switch VT2 and the first connecting pin, the 8th resistance of third switching tube VT3
The first end of R8, the interconnection of the second end of the 9th resistance R9, and the common end interconnected is the output end of the switching circuit 222；Institute
State the first connecting pin of first switch tube VT1, the second connection end of second switch VT2, the second end of the 8th resistance R8 difference
Ground connection；It is understood that ground connection here is the ground on circuit board, it provides a common reference for the signal in circuit
Current potential.
In the present embodiment, it should be noted that the supply voltage and the first power supply can be the same power supply conduct
In voltage detecting circuit 210 in the secondary side of photoelectrical coupler D1 and electric leakage signal output circuit 220 switching circuit 222 power supply electricity
Pressure, is also possible to use different power supplys defeated as the secondary side of photoelectrical coupler D1 in voltage detecting circuit 210 and electric leakage signal
Out in circuit 220 switching circuit 222 supply voltage.
In the present embodiment, it is also necessary to explanation, when voltage when the voltage inputted in switching circuit 222 greater than 36V,
Then first switch tube VT1 and third switching tube VT3 is worked normally, and a low level is exported, when the electricity inputted in switching circuit 222
Pressure is the voltage less than 36V in power circuit, then second switch VT2 is worked normally, and exports a high level, therefore switchs electricity
222 output end of road forms a level difference.Namely the voltage that charge-discharge circuit 221 generates can just drive first switch tube
VT1 conducting, the second connection end voltage of first switch tube VT1 are 0V, power circuit 223 and the 9th resistance R9, second switch
VT2 forming circuit, is connected to due to the second connection end of first switch tube VT1 with the first connecting pin of second switch VT2, institute
A level difference is generated with the first connecting pin of second switch VT2 and second connection end.
Wherein, the first switch tube VT1 and third switching tube VT3 is N-type metal-oxide-semiconductor, and the source electrode of N-type metal-oxide-semiconductor is described
First connecting pin of switching tube, the drain electrode of N-type metal-oxide-semiconductor are the second connection end of switching tube, and the grid of N-type metal-oxide-semiconductor is described opens
Close the controlled end of pipe.The second switch VT2 is p-type metal-oxide-semiconductor, and the source electrode of p-type metal-oxide-semiconductor is the first connection of the switching tube
End, the drain electrode of p-type metal-oxide-semiconductor are the second connection end of the switching tube, and the grid of p-type metal-oxide-semiconductor is the controlled end of the switching tube.
In above-described embodiment, by the way that first switch tube VT1, second switch VT2, third switching tube VT3 is arranged, to realize
Level difference signal exports and the power supply signal output for exporting the power circuit 223 is used as the detection of electrical leakage signal.
In one embodiment, as shown in figure 5, the control circuit 300 includes electric leakage signal acquisition module 310, relay
Module 350 and communication module 320, the electric leakage signal acquisition module 310 include power input 311, power output end 312,
Detection of electrical leakage signal receiving end 313, the first ground terminal 314 and the second ground terminal 315；Wherein, the first ground terminal 314 and second connects
Ground terminal 315 is the ground of the circuit board of control circuit, provides a common reference current potential for the signal in circuit；The power supply
Input terminal 311 is the input terminal of the control circuit 300, the power supply of the power output end 312 and the relay module 350
Receiving end 351 connects, and the detection of electrical leakage signal receiving end 313 is connect with the output end of the electric leakage signal output circuit 220；
The control terminal 352 of the relay module 350 is connect with the input terminal of the warning circuit 400；The communication module 320 is institute
State the detection of electrical leakage signal output end of control circuit 300.
In the present embodiment, applied environment figure as shown in Figure 5, when the firewire of tested equipment power supply line accidentally takes off
It falls or other reasons contact is in chassis shell body, and be detected when setting the earthing bar protecting field of shell and not connecting, at this time
The voltage of AC 220V cannot by earthing bar protecting field herein guide when, just with the input terminal of electric-leakage detection circuit 200
Forming circuit, electric-leakage detection circuit 200 detect electrical leakage voltage and judge whether that being greater than human-body safety protects voltage, then leaks electricity
Detection circuit 200 exports a detection of electrical leakage signal to the electric leakage signal acquisition module 310 in control circuit 300, electric leakage signal
After acquisition module 310 receives detection of electrical leakage signal, then controls relay module 350 and be connected, in relay control module 350
Relay just controls warning circuit 400 and gives a warning, and prompts the equipment leakage.
Wherein, control circuit 300 can be the low-voltage equipment at tested equipment scene, such as outdoor low-voltage distribution cabinet,
Outdoor monitoring equipment etc.；It is also possible to outdoor substation cabinet equipment.Component in relay control module 350 is relay
Device is used directly for when electric leakage signal acquisition module 310 receives detection of electrical leakage signal, connects relay control triggering report
The conducting of alert circuit 400.
In the above-described embodiments, by the electric leakage signal acquisition module 310 in control circuit 300, relay module 350,
The conducting of warning circuit 400 is exported and controlled to realize that relay module 350 controls detection of electrical leakage signal, is given a warning, prompting should
Equipment leakage reaches and the pedestrian near the equipment is reminded to take care.
In one embodiment, the warning circuit 400 includes alarm, and the input terminal of alarm is warning circuit 400
Input terminal, the output end of the alarm are connect with the second ground terminal 315 of the electric leakage signal acquisition module 310, the control
Circuit processed controls the alarm work of the warning circuit by the on/off of control relay module 350.Wherein, alarm electricity
Alarm in road 400 can be signal lamp, loudspeaker, it is to be understood that other equipment that can play reminding effect can also be with
As the alarm in warning circuit 400.
In above-described embodiment, by the way that alarm is arranged in warning circuit 400, to realize the sending of alarm signal, thus
It reminds the pedestrian around outdoor tested equipment to pay attention to leaking electricity, beyond this point, pays attention to personal safety.
It in one embodiment, include ethernet module 340, the input terminal of ethernet module 340 in the control circuit 300
It is connect with the output end of communication module 320, for the received detection of electrical leakage signal of the control circuit 300 to be uploaded to prison
Control platform.Control circuit 300 also may include wireless network module 330, the input terminal and communication module of wireless network module 330
320 output end connection, also for the received detection of electrical leakage signal of the control circuit 300 to be uploaded to monitoring
Platform.
In the present embodiment, the electric leakage signal detection module 310 in control circuit 300 receives electric-leakage detection circuit 200
When the detection of electrical leakage signal of output, while communication module 320 is triggered, detection of electrical leakage signal is uploaded into monitor supervision platform, notice dimension
Repair personnel's electric leakage and on-call maintenance.
Wherein, ethernet module can be through cable-network transmission, such as can be transferred to by twisted pair, optical fiber etc.
Monitor supervision platform；Wireless module, which can be, uploads to monitor supervision platform by GPRS, 3G or 4G signal etc..
In above-described embodiment, ethernet module 340, wireless module are arranged by the control circuit 300 in tested equipment
330, with realize tested equipment once occur firewire fall off or other electric leakage safety failures when, detection of electrical leakage signal is uploaded
Maintenance personal's electric leakage and on-call maintenance are notified to monitor supervision platform, in case outdoor equipment electric leakage damages.
In one embodiment, as shown in fig. 6, the power circuit is the DC voltage-stabilizing of entire electric leakage detecting and warning device
Power circuit, including the tenth resistance R10, eleventh resistor R11, twelfth resistor R12, the second capacitor C2, third capacitor C3,
Four capacitor C4, the second zener diode VD2, third diode VD3, pressure regulation chip D2, the first light emitting diode HL1；Pass through this
DC-stabilized circuit can make the DC voltage stability of output, not change with the variation of ac grid voltage and load.
Wherein, pressure regulation chip D2 can be regulator, such as LM2596 step down supplies manage opening for monolithic integrated optical circuit
Voltage regulator is closed, the driving current of 3A can be exported, it includes fixed oscillator (150KHZ) and benchmark voltage-stablizer
(1.23V), and there is perfect protection circuit, current limit, Thermal shutdown circuit etc., few peripheral device is only needed using the device
Part can constitute efficient voltage regulator circuit.There is linear and load regulation characteristic well simultaneously, fixed output voltage for example has
3.3V, 5V, 12V, tunable versions can export the various voltages less than 37V；It is chosen as in this DC-stabilized circuit defeated
12V out.
In the present embodiment, it is in voltage detecting circuit 210 that DC-stabilized circuit, which can be used as the first above-mentioned power supply,
Photoelectrical coupler D1 secondary side input terminal provide power supply, can also be used as power circuit 223 be electric leakage signal output circuit
Switching circuit 222 in 220 provides power supply, while can also provide power supply for control circuit 300；Here power circuit can be with
It is that a power circuit is powered in this programme all referring to the circuit arrived, being also possible to multiple power circuits is respectively this programme
In each circuit power supply, for realizing the normal operation of entire electric leakage detecting and warning device.
The above description is only a preferred embodiment of the present invention, is not intended to limit the scope of the invention, all at this
Under the inventive concept of invention, using equivalent structure transformation made by description of the invention and accompanying drawing content, or directly/use indirectly
It is included in other related technical areas in scope of patent protection of the invention.
Claims (10)
1. a kind of electric leakage detecting and warning device characterized by comprising electric-leakage detection circuit, control circuit and warning circuit, institute
The test side for stating electric-leakage detection circuit is used to connect the shell of the tested equipment, the output end of the electric-leakage detection circuit with
The input terminal of the control circuit connects；The control terminal of the control circuit is connect with the input terminal of the warning circuit；
Wherein, the electric-leakage detection circuit includes:
Voltage detecting circuit, the test side of the voltage detecting circuit are the test side of the electric-leakage detection circuit；The voltage
Detection circuit, for detecting the voltage of the tested equipment shell, and in the voltage for detecting the tested equipment shell
Output detection level signal when greater than preset safeguard protection voltage；
Electric leakage signal output circuit, the input terminal of the electric leakage signal output circuit and the output end of the voltage detecting circuit connect
It connects, the output end of the electric leakage signal output circuit is the output end of the electric-leakage detection circuit；The electric leakage signal output electricity
Road for triggering according to the detection level signal, and exports detection of electrical leakage signal；
The control circuit is alerted for controlling the warning circuit according to the detection of electrical leakage signal.
2. electric leakage detecting and warning device as described in claim 1, which is characterized in that the voltage detecting circuit includes the first electricity
Source, test side, zero line side, first resistor, second resistance, 3rd resistor, the 4th resistance and photoelectrical coupler；
The first end of the first end of the first resistor, the first end of second resistance and 3rd resistor connects with the test side respectively
Connect, the second end of the second end of the first resistor, the second end of second resistance and 3rd resistor respectively with the photoelectric coupling
The primary side input terminal of device connects；The primary side output end of the photoelectrical coupler is connect with the zero line side, the photoelectrical coupler
The input terminal on secondary side connect through the 4th resistance with the first power supply, the output end on the secondary side of the photoelectrical coupler is described
The output end of voltage detecting circuit.
3. electric leakage detecting and warning device as claimed in claim 2, which is characterized in that the voltage detecting circuit further includes first
Diode and the 5th resistance；
The anode of the first diode and the first end of the 5th resistance, the primary side output end of the photoelectrical coupler are mutual
Even, the second end of the cathode of the first diode and the first resistor, the second end of second resistance, 3rd resistor second
The interconnection of the primary side input terminal of end and the photoelectrical coupler；The second end of five resistance is connect with the zero line side.
4. electric leakage detecting and warning device as described in claim 1, which is characterized in that the electric leakage signal output circuit includes electricity
Source circuit, charge-discharge circuit and switching circuit；
The input terminal of the charge-discharge circuit be electric leakage signal output circuit input terminal, the output end of the charge-discharge circuit with
The controlled end of the switching circuit connects, and the input terminal of the switching circuit is connect with the output end of the power circuit, described
The output end of switching circuit is the output end of electric leakage signal output circuit；Wherein,
The charge-discharge circuit, the detection level signal control switch circuit for being exported according to the voltage detecting circuit
Conducting；
The switching circuit, the power supply signal output in conducting, the power circuit to be exported are examined as the electric leakage
Survey signal.
5. electric leakage detecting and warning device as claimed in claim 4, which is characterized in that the charge-discharge circuit includes the 6th resistance
And first capacitor；
The first end interconnection of the first end and the first capacitor of 6th resistance, and the common end after interconnection is the charge and discharge
The input terminal of circuit, the second end interconnection of the second end and the first capacitor of the 6th resistance, and it is public after interconnection
End is the output end of the charge-discharge circuit.
6. electric leakage detecting and warning device as claimed in claim 4, which is characterized in that the switching circuit includes first switch
Pipe, second switch, third switching tube, the 7th resistance, the 8th resistance and the 9th resistance, the first switch tube, second switch
Pipe, third switching tube all have the first connecting pin, second connection end and controlled end；
The controlled end of the first switch tube is the controlled end of switching circuit, the second connection end of the first switch tube and second
The second end interconnection of the controlled end of switching tube, the controlled end of third switching tube, the 7th resistance；The second of the third switching tube connects
End, the first end of the 7th resistance, the interconnection of the first end of the 9th resistance are connect, and the common end interconnected is the input of the switching circuit
End；The first connecting pin and the first connecting pin of third switching tube of the second switch, the first end of the 8th resistance, the 9th electricity
The second end of resistance interconnects, and the common end interconnected is the output end of the switching circuit；First connection of the first switch tube
End, the second connection end of second switch, the second end of the 8th resistance are grounded respectively.
7. electric leakage detecting and warning device as described in claim 1, which is characterized in that the control circuit includes that electric leakage signal is adopted
Collect module, relay module and communication module；Wherein,
The electric leakage signal acquisition module includes power input, power output end, detection of electrical leakage signal receiving end and ground terminal,
The power input is the input terminal of the control circuit, the power supply reception of the power output end and the relay module
End connection, the detection of electrical leakage signal receiving end are connect with the output end of the electric leakage signal output circuit；The relay mould
The control terminal of block is connect with the input terminal of the warning circuit；The communication module is the detection of electrical leakage signal of the control circuit
Output end.
8. electric leakage detecting and warning device as claimed in claim 7, which is characterized in that the warning circuit includes alarm；
The input terminal of the alarm is the input terminal of warning circuit, and the output end of the alarm and the electric leakage signal acquire
The ground terminal of module connects, and the control circuit controls the report of the warning circuit by the on/off of control relay module
Alert device triggering.
9. electric leakage detecting and warning device as claimed in claim 7, which is characterized in that the control circuit further includes Ethernet mould
Block；
The input terminal of the ethernet module is connect with the output end of the communication module, the ethernet module, is used for institute
It states the received detection of electrical leakage signal of control circuit and uploads to monitor supervision platform.
10. electric leakage detecting and warning device as claimed in claim 7, which is characterized in that the control circuit further includes wireless network
Network module；
The input terminal of the wireless network module is connect with the output end of the communication module, and the wireless network module is used for
The received detection of electrical leakage signal of the control circuit is uploaded into monitor supervision platform.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811293431.6A CN109245042A (en) | 2018-10-31 | 2018-10-31 | Electric leakage detecting and warning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811293431.6A CN109245042A (en) | 2018-10-31 | 2018-10-31 | Electric leakage detecting and warning device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109245042A true CN109245042A (en) | 2019-01-18 |
Family
ID=65080178
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811293431.6A Pending CN109245042A (en) | 2018-10-31 | 2018-10-31 | Electric leakage detecting and warning device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109245042A (en) |
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| CN109975645A (en) * | 2019-04-03 | 2019-07-05 | 重庆倍莫廷科技有限公司 | A kind of optical isolation wide-voltage range electric leakage monitoring, alarming module |
| CN110297156A (en) * | 2019-08-15 | 2019-10-01 | 山东凌宝智能科技有限公司 | A kind of circuit and method by electrical leakage voltage detection electric leakage |
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Application publication date: 20190118 |