CN209072045U - A kind of earth leakage protective device - Google Patents
A kind of earth leakage protective device Download PDFInfo
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- CN209072045U CN209072045U CN201821755418.3U CN201821755418U CN209072045U CN 209072045 U CN209072045 U CN 209072045U CN 201821755418 U CN201821755418 U CN 201821755418U CN 209072045 U CN209072045 U CN 209072045U
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Abstract
The utility model discloses a kind of earth leakage protective devices, the acquisition module of the current electric leakage insulation values including connecting with electric wiring, for obtaining electric wiring；It is connect respectively with the main switch for obtaining module and electric wiring, for when currently electric leakage insulation values are less than insulation safety value, control main switch is disconnected, is also used to when currently electric leakage insulation values are greater than or equal to insulation safety value, the control module of control main switch closure；And control module connection, the display module for showing state corresponding with current electric leakage insulation values.The utility model is when the electric leakage insulation values of electric wiring reduce; display module real-time display state corresponding with current electric leakage insulation values can be passed through; to achieve the purpose that give warning in advance; it ensure that the safe handling of electric wiring, meanwhile, after electric leakage insulation values are restored to insulation safety value; main switch closure can be controlled by control module; electric wiring is connected, realization automatically resets, and improves earth leakage protective reliability and safety.
Description
Technical field
The utility model relates to earth leakage protective fields, more particularly to a kind of earth leakage protective device.
Background technique
Electric wiring or equipment when being squeezed breakage and the factors such as nibbling by animal and influence, can be sent out due to being used for a long time
Raw insulation is impaired, once these insulation damaged parts of human contact, will form shorted to earth, leak electricity, make to personal safety
At threat.In addition, for electric wiring or equipment, the reason of causing shorted to earth, it could also be because high temperature, electric arc etc.
The energy of formation discharges, if excluding these energy not in time, may lead electrical fire.Earth leakage protective device is that one kind exists
Electric wiring or equipment occur shorted to earth and disconnect high-tension circuit in time, with the important protective device for preventing the person from getting an electric shock.
It is understood that electric wiring or equipment, when occurring to insulate impaired, electric leakage insulation values can reduce, existing leakage
Electrical protective device is usually the direct trigger protection function when insulation values of leaking electricity are reached or fallen below insulation safety value, is cut off whole
Electric wiring, and can not achieve synchronous early warning during insulation values of leaking electricity reduce, cause staff not find in advance
Line insulation value reduces, and safeguard measure is taken in time, so that the safety and reliability of existing earth leakage protective device is lower.
Therefore, how to provide a kind of scheme of solution above-mentioned technical problem is that those skilled in the art need to solve at present
Problem.
Utility model content
The purpose of the utility model is to provide a kind of earth leakage protective devices, pass through display module real-time display and current electric leakage
The corresponding state of insulation values ensure that the safe handling of electric wiring to achieve the purpose that give warning in advance, meanwhile, it is exhausted in electric leakage
After edge value is restored to insulation safety value, electric wiring conducting is controlled by control module, and release the early warning of display module, improved
Earth leakage protective reliability and safety.
In order to solve the above technical problems, the utility model provides a kind of earth leakage protective device, comprising:
It is connect with electric wiring, the acquisition module of current electric leakage insulation values for obtaining electric wiring；
It is connect respectively with the main switch of the acquisition module and the electric wiring, for being less than in currently electric leakage insulation values
Or when being equal to insulation safety value, controls the main switch and disconnect, be also used to be greater than the insulation safety in currently electric leakage insulation values
When value, the control module of the main switch closure is controlled；
And the control module connection, the display module for showing state corresponding with current electric leakage insulation values.
Preferably, the control module includes:
For setting the setup unit of safe voltage corresponding with the insulation safety value；
First input end with it is described obtain module output end connect, the output end of the second input terminal and the setup unit
The amplifying unit that connection, output end are connect with the display module, for being obtained according to current electrical leakage voltage and the safe voltage
Amplify current leakage current to current leakage current, and by preset rules, obtains the state current to trigger protection unit；
It is connect respectively with the output end of the amplifying unit and the main switch, for being greater than or waiting in the state current
When action current, controls the main switch and disconnect, be also used to control institute when the state current is less than the action current
State the protection location of main switch closure；
Wherein, the action current is electric current corresponding with the insulation safety value.
Preferably, the amplifying unit includes operational amplifier, first resistor, second resistance, first capacitor, the one or three pole
Pipe, in which:
The non-inverting input terminal of the operational amplifier is connect with the output end of the setup unit, the operational amplifier
Inverting input terminal is connect with the first end of the output end for obtaining module and the first resistor respectively, the first resistor
Second end is connect with the first end of the first capacitor, and the second end of the first capacitor is defeated with the operational amplifier respectively
The base stage of the connection of the first end of outlet and the second resistance, the second end of the second resistance and first triode connects
Connect, the emitter of first triode ground connection, the collector of first triode respectively with the first capacitor second
End, the protection location, the display module are connected with power supply.
Preferably, the amplifying unit further includes the second triode, the base stage of second triode and the described 1st
The collector of pole pipe connects, the emitter ground connection of second triode, the collector of second triode respectively with it is described
Protection location, the display module and power supply connection.
Preferably, the protection location includes actuating relay, the first end of the actuating relay and the described 2nd 3
The base stage of pole pipe connects, and the second end of the actuating relay is connect with the collector of second triode.
Preferably, the display module includes 3rd resistor and light emitting diode；
The first end of the 3rd resistor is connect with the base stage of second triode, the second end of the 3rd resistor with
The anode of the light emitting diode connects, and the cathode of the light emitting diode is connect with the collector of second triode.
Preferably, the acquisition module includes the 4th resistance, the 5th resistance and first diode, in which:
The first end of 4th resistance is connect with the electric wiring, the second end and described first of the 4th resistance
The cathode of diode connects, and the anode of the first diode is connect with the first end of the 5th resistance, the 5th resistance
Second end as it is described obtain module output end.
Preferably, the setup unit includes adjustable potentiometer and the 6th resistance, in which:
The first end of the adjustable potentiometer respectively with the control terminal of the adjustable potentiometer, the 6th resistance first
End and power supply connection, the second end ground connection of the adjustable potentiometer, the second end of the 6th resistance is as the setting
The output end of unit.
Preferably, which further includes the 7th resistance, the 8th resistance, the 9th resistance, the tenth resistance, the second electricity
Hold, third capacitor, the second diode, third diode, the 4th diode and the 5th diode, in which:
The first end of 7th resistance respectively with the first end of the 8th resistance, the first end of the 9th resistance,
The first end of tenth resistance, the cathode of the 5th diode and power supply connection, the second end of the 7th resistance
It is connect respectively with the cathode of the anode of the first diode and second diode, the second end of the 8th resistance and institute
The first end connection of adjustable potentiometer is stated, the anode of second diode connects with the first end of second capacitor and ground respectively
Connect, the first end of second capacitor is connect with the anode of the first diode, the cathode of the third diode respectively with
The connection of the anode of the second end of 5th resistance and the 4th diode, the anode of the third diode respectively with it is described
The connection of the second end of the cathode of 4th diode and the 6th resistance, the second end and the first capacitor of the 9th resistance
Second end connection, the second end of the tenth resistance connect with the base stage of second triode, the of the third capacitor
One end is connect with the second end of the second resistance, the second end ground connection of the third capacitor, the anode of the 5th diode
It is connect with the collector of second diode.
Preferably, the operational amplifier is bipolar operational Amplifier OP07.
The utility model provides a kind of earth leakage protective device, including connect with electric wiring, for obtaining electric wiring
Current electric leakage insulation values acquisition module；It connect, with the main switch for obtaining module and electric wiring for being leaked currently respectively
When galvanic insulation value is less than insulation safety value, control main switch disconnects, is also used to be greater than or equal to insulation in currently electric leakage insulation values
When safety value, the control module of control main switch closure；It is connected with control module, is corresponding with current electric leakage insulation values for showing
State display module.As it can be seen that in practical applications, being shown using the embodiment of the utility model when insulation values of leaking electricity reduce
Show that module can be ensure that electrical with real-time display state corresponding with current electric leakage insulation values to achieve the purpose that give warning in advance
The safe handling of route, meanwhile, after electric leakage insulation values are restored to insulation safety value, control module can control main switch and close
It closes, realization automatically resets, electric wiring is connected, releases the early warning of display module, improves earth leakage protective reliability and peace
Quan Xing.
Detailed description of the invention
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of application for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is a kind of structural schematic diagram of earth leakage protective device provided by the utility model；
Fig. 2 is the structural schematic diagram of another earth leakage protective device provided by the utility model；
Fig. 3 is the structural schematic diagram of another earth leakage protective device provided by the utility model；
Fig. 4 is the structural schematic diagram of another earth leakage protective device provided by the utility model.
Specific embodiment
The core of the utility model is to provide a kind of earth leakage protective device, passes through display module real-time display and current electric leakage
The corresponding state of insulation values ensure that the safe handling of electric wiring to achieve the purpose that give warning in advance, meanwhile, it is exhausted in electric leakage
After edge value is restored to insulation safety value, electric wiring conducting is controlled by control module, and release the early warning of display module, improved
Earth leakage protective reliability and safety.
It is practical new below in conjunction with this to keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer
Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched
The embodiment stated is the utility model a part of the embodiment, instead of all the embodiments.Based on the implementation in the utility model
Example, every other embodiment obtained by those of ordinary skill in the art without making creative efforts belong to
The range of the utility model protection.
Fig. 1 is please referred to, Fig. 1 is a kind of structural schematic diagram of earth leakage protective device provided by the utility model, comprising:
It is connect with electric wiring, the acquisition module 1 of current electric leakage insulation values for obtaining electric wiring；
It is connect respectively with the main switch for obtaining module 1 and electric wiring, for being less than or equal in currently electric leakage insulation values
When insulation safety value, control main switch disconnects, is also used to control main switch when currently electric leakage insulation values are greater than insulation safety value
The control module 2 of closure；
And the connection of control module 2, the display module 3 for showing state corresponding with current electric leakage insulation values.
Specifically, electric wiring or equipment are due to being used for a long time or being squeezed damaged or the factors shadow such as nibbling by animal
When ringing, electric leakage insulation values can be reduced, and obtained the current electric leakage insulation values that module 1 is used to obtain electric wiring, leaked electricity currently
When insulation values are less than or equal to insulation safety value, the defencive function of earth leakage protective device is triggered, i.e. control module 2 controls electric wire
The main switch on road disconnects, to realize earth leakage protective, wherein insulation safety value refers to the earth leakage search/lockout value of electric wiring, electric wire
The current electric leakage insulation values on road are not more than insulation safety value, illustrate that the electric wiring leaks electricity, and are in non-secure states, currently
When insulation values of leaking electricity are greater than insulation safety value, illustrate that the electric wiring is in a safe condition.When insulation values of leaking electricity start to reduce,
Electric wiring or equipment may leak electricity at any time, and in order to realize the purpose of early warning, the utility model is additionally provided with display
Module 3, during insulation values of leaking electricity reduce, real-time display and the current electric leakage one-to-one state of insulation values, work people
Member can the state according to display module 3, electric wiring or equipment are handled in advance, thus improve this electric leakage protect
The safety and reliability of protection unit.
Specifically, this is practical when insulation values of leaking electricity are restored to insulation safety value or more (i.e. electrical circuit fault exclusion)
Earth leakage protective device provided by novel may be implemented to automatically reset, i.e., the main switch that control module 2 controls electric wiring is closed,
Electric wiring or equipment is set to restore to work normally, it is high-efficient, while the early warning of display module 3 is released, to further improve
The reliability and safety of earth leakage protective device provided by the utility model.
The utility model provides a kind of earth leakage protective device, including connect with electric wiring, for obtaining electric wiring
Current electric leakage insulation values acquisition module；It connect, with the main switch for obtaining module and electric wiring for being leaked currently respectively
When galvanic insulation value is less than insulation safety value, control main switch disconnects, is also used to be greater than or equal to insulation in currently electric leakage insulation values
When safety value, the control module of control main switch closure；It is connected with control module, is corresponding with current electric leakage insulation values for showing
State display module.As it can be seen that in practical applications, being shown using the embodiment of the utility model when insulation values of leaking electricity reduce
Show that module can be ensure that electrical with real-time display state corresponding with current electric leakage insulation values to achieve the purpose that give warning in advance
The safe handling of route, meanwhile, after electric leakage insulation values are restored to insulation safety value, control module can control main switch and close
It closes, realization automatically resets, electric wiring is connected, releases the early warning of display module, improves earth leakage protective reliability and peace
Quan Xing.
Referring to figure 2., Fig. 2 is the structural schematic diagram of another earth leakage protective device provided by the utility model, the leakage
Electrical protective device is on the basis of the above embodiments:
Embodiment as one preferred, control module 2 include:
For setting the setup unit 21 of safe voltage corresponding with insulation safety value；
First input end is connect with the output end for obtaining module 1, the second input terminal is connect with the output end of setup unit 21,
The amplifying unit 22 that output end is connect with display module 3, for currently being leaked electricity according to current electrical leakage voltage and safe voltage
Electric current, and amplify current leakage current by preset rules, obtain the state current to trigger protection unit 23；
It is connect respectively with the output end of amplifying unit 22 and main switch, for being greater than or equal to action current in state current
When, control main switch is disconnected, is also used to when state current is less than action current, the protection location 23 of control main switch closure；
Wherein, action current is electric current corresponding with insulation safety value.
It is understood that insulation safety value refers to that resistance value, safe voltage are voltage values corresponding with insulation safety value,
Wherein, safe voltage can be set by setup unit 21, during the current electric leakage insulation values of electric wiring reduce,
Its current electrical leakage voltage opposite can increase, when current electrical leakage voltage is increased to safe voltage, i.e. the shape that exports of amplifying unit 22
When state electric current reaches action current, the insulation values that illustrate currently to leak electricity have descended to insulation safety value or following, at this point, control
Protection location 23 in module 2 controls main switch and disconnects, correspondingly, when currently electric leakage insulation values increase, current electric leakage electricity
Pressure and state current can be reduced accordingly, and when it is reduced to safety value or less, protection location 23 controls main switch closure, be realized
It automatically resets.
Referring to figure 3., Fig. 3 is the structural schematic diagram of another earth leakage protective device provided by the utility model, the leakage
Electrical protective device is on the basis of the above embodiments:
Embodiment as one preferred, amplifying unit 22 include operational amplifier OPA, first resistor R1, second resistance
R2, first capacitor C1, the first triode T1, in which:
The non-inverting input terminal of operational amplifier OPA and the output end of setup unit connect, the reverse phase of operational amplifier OPA
Input terminal connect with the output end and the first end of first resistor R1 for obtaining module 1 respectively, the second end of first resistor R1 and the
The first end of one capacitor C1 connects, the second end of first capacitor C1 respectively with the output end and second resistance of operational amplifier OPA
The first end of R2 connects, and the second end of second resistance R2 is connect with the base stage of the first triode T1, the transmitting of the first triode T1
Pole ground connection, the collector of the first triode T1 respectively with the second end of first capacitor C1, protection location 23, display module 3 and electricity
Source connection.
Embodiment as one preferred, amplifying unit 22 further include the second triode T2, the base stage of the second triode T2
It is connect with the collector of the first triode T1, the emitter ground connection of the second triode T2, the collector difference of the second triode T2
It is connect with protection location 23, display module 3 and power supply.
Specifically, amplifying unit 22 provided by the utility model is a kind of operation amplifier electricity of band compensation feedback function
Road specifically includes operational amplifier OPA, the first triode T1, the second triode T2, first capacitor C1 (polarity free capacitor),
One resistance R1, second resistance R2.The output end of operational amplifier OPA is connected to it instead by first capacitor C1 and first resistor R1
Phase input terminal forms compensation feedback signal.Operational amplifier OPA non-inverting input terminal accesses safe voltage, inverting input terminal access
Current electrical leakage voltage, operational amplifier OPA are defeated according to comparison result for being compared to safe voltage and current electrical leakage voltage
Corresponding current leakage current out, current leakage current are converted into being enough trigger protection unit 23 after the amplification of two-stage triode
State current realizes the dangerous high voltage in electric wiring to faint leakage current, finally arrives the conversion process of state current,
And current leakage current signal is amplified using two-stage triode, signal strength can be increased, to further enhance this
The early warning effect & Safety energy of utility model.
Wherein, operational amplifier OPA can select the bipolar operational amplifier OP07 of low noise, non-chopper-zero-stabilized, into
One step improves the reliability of earth leakage protective device.
Embodiment as one preferred, protection location 23 include actuating relay J1, the first end of actuating relay J1
It is connect with the base stage of the second triode T2, the second end of actuating relay J1 is connect with the collector of the second triode T2.
Embodiment as one preferred, display module 3 include 3rd resistor R3 and light emitting diode D0；
The first end of 3rd resistor R3 is connect with the base stage of the second triode T2, the second end of 3rd resistor R3 and luminous two
The anode of pole pipe D0 connects, and the cathode of light emitting diode D0 is connect with the collector of the second triode T2.
Specifically, protection location 23 mainly includes actuating relay J1, actuating relay J1 here is current mode relay
Device, display module 3 mainly include 3rd resistor R3 and light emitting diode D0.Light emitting diode D0 connects with 3rd resistor R3, then
The collector of the second triode T2 is parallel to actuating relay J1, with the reduction of current electric leakage insulation values, the second triode
The base stage of T2 is gradually triggered, and light emitting diode D0 gradually brightens, and is less than or equal to insulation safety value in currently electric leakage insulation values
Actuating relay J1 is triggered afterwards, is prescribed by a pair that it is accessed and disconnects main switch with close point, realizes earth leakage protective, together
When staff can according to light emitting diode D0 brightness variation come determine electric wiring currently leak electricity insulation values reduction journey
Degree.
Embodiment as one preferred, obtaining module 1 includes the 4th resistance R4, the 5th resistance R5 and first diode
D1, in which:
The first end of 4th resistance R4 is connect with electric wiring, the second end of the 4th resistance R4 and the yin of first diode D1
Pole connection, the anode of first diode D1 are connect with the first end of the 5th resistance R5, and the second end of the 5th resistance R5 is as acquisition
The output end of module 1.
Specifically, in view of in practical applications, earth leakage protective device is directly connected in electric wiring, be easy to cause line
Road is burnt, and what the acquisition module 1 in the utility model was got is faint leakage current in electric wiring, using acquisition module
1 internal conversion obtains current electrical leakage voltage.
It obtains module 1 and includes high-power energy consumption resistance (i.e. the 4th resistance R4), the 5th resistance R5 and first diode D1, the
The cathode of one diode D1 is linked into electric wiring by the 4th resistance R4, and the anode of first diode D1 passes through the 5th resistance
R5 is linked into the inverting input terminal of operational amplifier OPA, output electric leakage sampled value, i.e., current electrical leakage voltage.
Embodiment as one preferred, setup unit 21 include adjustable potentiometer W and the 6th resistance R6, in which:
The first end of the adjustable potentiometer W first end and power supply with the control terminal of adjustable potentiometer W, the 6th resistance R6 respectively
Connection, the second end ground connection of adjustable potentiometer W, output end of the second end of the 6th resistance R6 as setup unit 21.
Specifically, setup unit 21 is for setting corresponding with insulation safety value safe voltage, including adjustable potentiometer W with
After 6th resistance R6, adjustable potentiometer W and the 6th resistance R6 series connection, the non-inverting input terminal of operational amplifier OPA is accessed in one end, defeated
Safe voltage out, other end access device shell and the earth form ground reference value altogether.
Referring to figure 4., Fig. 4 is the structural schematic diagram of another earth leakage protective device provided by the utility model, the leakage
Electrical protective device is on the basis of the above embodiments:
Embodiment as one preferred, the earth leakage protective device further include the 7th resistance R7, the 8th resistance R8, the 9th
The resistance capacitor C2 of R9, the tenth resistance R10, second, third capacitor C3, the second diode D2, third diode D3, the four or two pole
Pipe D4 and the 5th diode D5, in which:
The first end of 7th resistance R7 respectively with the first end of the 8th resistance R8, the first end of the 9th resistance R9, the tenth electricity
Hinder the first end of R10, the cathode of the 5th diode D5 and power supply connection, the second end of the 7th resistance R7 respectively with the one or two pole
The connection of the cathode of the anode of pipe D1 and the second diode D2, the second end of the 8th resistance R8 and the first end of adjustable potentiometer W connect
It connects, the anode of the second diode D2 is connect with the first end of the second capacitor C2 and ground respectively, the first end of the second capacitor C2 and the
The anode of one diode D1 connects, the cathode of third diode D3 respectively with the second end and the 4th diode of the 5th resistance R5
The anode of D4 connects, and the anode of third diode D3 connects with the second end of the cathode of the 4th diode D4 and the 6th resistance R6 respectively
It connects, the second end of the 9th resistance R9 is connect with the second end of first capacitor C1, the second end and the second triode of the tenth resistance R10
The base stage of T2 connects, and the first end of third capacitor C3 is connect with the second end of second resistance R2, the second termination of third capacitor C3
Ground, the anode of the 5th diode D5 are connect with the collector of the second diode D2.
Specifically, in earth leakage protective device provided by the utility model, further include for partial pressure the 7th resistance R7 and
8th resistance R8, for realizing anti-interference and bypass protection the second capacitor C2, third capacitor C3, the 9th resistance R9, the tenth electricity
R10, the second diode D2, third diode D3, the 4th diode D4 and the 5th diode D5 are hindered, this electric leakage guarantor is further enhanced
The safety of protection unit.
To sum up, earth leakage protective device provided by the utility model sets safe voltage, the peace by adjustable potentiometer W
Full voltage value corresponds to the insulation safety value of electric wiring, can be by during the electric leakage insulation values of electric wiring gradually decrease
Faint leakage current is gradually formed, which amplifies form state current level step by step by two-stage triode, with working as
Preceding electric leakage insulation values gradually decrease, and current state current level can be gradually increased, and light emitting diode D0 can be lighted gradually, when electrical
When the current electric leakage insulation values of route are reduced to insulation safety value, after state current level trigger action relay J1, disconnect master and open
It closes.After the current electric leakage insulation values of electric wiring are restored to higher than insulation safety value, actuating relay J1 automatically resets, hair
Optical diode D0 extinguishes.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.
The foregoing description of the disclosed embodiments can be realized professional and technical personnel in the field or using originally practical new
Type.Various modifications to these embodiments will be readily apparent to those skilled in the art, and determine herein
The General Principle of justice can be realized in other embodiments without departing from the spirit or scope of the present utility model.Cause
This, the present invention will not be limited to the embodiments shown herein, and is to fit to and principles disclosed herein
The widest scope consistent with features of novelty.
Claims (10)
1. a kind of earth leakage protective device characterized by comprising
It is connect with electric wiring, the acquisition module of current electric leakage insulation values for obtaining the electric wiring；
It is connect respectively with the main switch of the acquisition module and the electric wiring, for being less than or waiting in currently electric leakage insulation values
When insulation safety value, controls the main switch and disconnects, is also used to when currently electric leakage insulation values are greater than the insulation safety value,
Control the control module of the main switch closure；
And the control module connection, the display module for showing state corresponding with current electric leakage insulation values.
2. earth leakage protective device according to claim 1, which is characterized in that the control module includes:
For setting the setup unit of safe voltage corresponding with the insulation safety value；
First input end is connect with the output end for obtaining module, the output end of the second input terminal and the setup unit connects
It connects, the amplifying unit that output end is connect with the display module, for being obtained according to current electrical leakage voltage and the safe voltage
Current leakage current, and amplify current leakage current by preset rules, obtain the state current to trigger protection unit；
It is connect respectively with the output end of the amplifying unit and the main switch, is dynamic for being greater than or equal in the state current
When making electric current, controls the main switch and disconnect, be also used to control the master when the state current is less than the action current
The protection location closed the switch；
Wherein, the action current is electric current corresponding with the insulation safety value.
3. earth leakage protective device according to claim 2, which is characterized in that the amplifying unit includes operational amplifier,
First resistor, second resistance, first capacitor, the first triode, in which:
The non-inverting input terminal of the operational amplifier is connect with the output end of the setup unit, the reverse phase of the operational amplifier
Input terminal is connect with the first end of the output end for obtaining module and the first resistor respectively, and the second of the first resistor
End is connect with the first end of the first capacitor, the second end of the first capacitor output end with the operational amplifier respectively
And the first end connection of the second resistance, the second end of the second resistance are connect with the base stage of first triode, institute
State the first triode emitter ground connection, the collector of first triode respectively with the second end of the first capacitor, institute
State protection location, the display module is connected with power supply.
4. earth leakage protective device according to claim 3, which is characterized in that the amplifying unit further includes the two or three pole
Pipe, the base stage of second triode are connect with the collector of first triode, and the emitter of second triode connects
Ground, the collector of second triode are connect with the protection location, the display module and the power supply respectively.
5. earth leakage protective device according to claim 4, which is characterized in that the protection location includes actuating relay,
The first end of the actuating relay is connect with the base stage of second triode, the second end of the actuating relay with it is described
The collector of second triode connects.
6. earth leakage protective device according to claim 5, which is characterized in that the display module includes 3rd resistor and hair
Optical diode；
The first end of the 3rd resistor is connect with the base stage of second triode, the second end of the 3rd resistor with it is described
The anode of light emitting diode connects, and the cathode of the light emitting diode is connect with the collector of second triode.
7. according to earth leakage protective device described in claim 4-6 any one, which is characterized in that the acquisition module includes the
Four resistance, the 5th resistance and first diode, in which:
The first end of 4th resistance is connect with the electric wiring, the second end of the 4th resistance and the one or two pole
The cathode of pipe connects, and the anode of the first diode is connect with the first end of the 5th resistance, and the of the 5th resistance
Two ends are as the output end for obtaining module.
8. earth leakage protective device according to claim 7, which is characterized in that the setup unit include adjustable potentiometer and
6th resistance, in which:
The first end of the adjustable potentiometer respectively with the control terminal of the adjustable potentiometer, the first end of the 6th resistance and
The power supply connection, the second end ground connection of the adjustable potentiometer, the second end of the 6th resistance is as the setup unit
Output end.
9. earth leakage protective device according to claim 8, which is characterized in that the earth leakage protective device further includes the 7th electricity
Resistance, the 8th resistance, the 9th resistance, the tenth resistance, the second capacitor, third capacitor, the second diode, third diode, the four or two
Pole pipe and the 5th diode, in which:
The first end of 7th resistance respectively with the first end of the 8th resistance, first end of the 9th resistance, described
The first end of tenth resistance, the cathode of the 5th diode and power supply connection, the second end difference of the 7th resistance
Connect with the anode of the first diode and with the cathode of second diode, the second end of the 8th resistance with it is described
The first end of adjustable potentiometer connects, and the anode of second diode connects with the first end of second capacitor and ground respectively
Connect, the first end of second capacitor is connect with the anode of the first diode, the cathode of the third diode respectively with
The connection of the anode of the second end of 5th resistance and the 4th diode, the anode of the third diode respectively with it is described
The connection of the second end of the cathode of 4th diode and the 6th resistance, the second end and the first capacitor of the 9th resistance
Second end connection, the second end of the tenth resistance connect with the base stage of second triode, the of the third capacitor
One end is connect with the second end of the second resistance, the second end ground connection of the third capacitor, the anode of the 5th diode
It is connect with the collector of second diode.
10. earth leakage protective device according to claim 9, which is characterized in that the operational amplifier is bipolar operational
Amplifier OP07.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821755418.3U CN209072045U (en) | 2018-10-26 | 2018-10-26 | A kind of earth leakage protective device |
Applications Claiming Priority (1)
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109245041A (en) * | 2018-10-26 | 2019-01-18 | 兖矿东华重工有限公司 | A kind of earth leakage protective device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109245041A (en) * | 2018-10-26 | 2019-01-18 | 兖矿东华重工有限公司 | A kind of earth leakage protective device |
| CN109245041B (en) * | 2018-10-26 | 2024-02-02 | 兖矿东华重工有限公司 | Leakage protection device |
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