CN106291175A - Earth leakage protective device double test circuit and method of testing - Google Patents
Earth leakage protective device double test circuit and method of testing Download PDFInfo
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- CN106291175A CN106291175A CN201610613499.2A CN201610613499A CN106291175A CN 106291175 A CN106291175 A CN 106291175A CN 201610613499 A CN201610613499 A CN 201610613499A CN 106291175 A CN106291175 A CN 106291175A
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- 238000012360 testing method Methods 0.000 title claims abstract description 167
- 230000001681 protective effect Effects 0.000 title claims abstract description 161
- 238000010998 test method Methods 0.000 title claims abstract description 11
- 230000005611 electricity Effects 0.000 claims description 23
- 238000004088 simulation Methods 0.000 claims description 22
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- 239000004744 fabric Substances 0.000 claims description 3
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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Abstract
The invention provides a kind of earth leakage protective device double test circuit and method of testing; including the first test circuit; also include the second test circuit being in parallel with the first test circuit; the second test button SW2, the second test operation display lamp LED2 and analog current limiting resistance R2 that second test circuit includes being sequentially connected in series, the most also one with the diode D2 of LED2 reverse parallel connection；The present invention provides test circuit and the method for testing of a kind of electric power safety outfit earth leakage protective device state; being worked in coordination by the first and second test buttons, composition is double tests button; the person that realizes onsite application and electrician more accurately can speculate the duty of earth leakage protective device more reliably, help to solve the potential problem of earth leakage protective device.
Description
Technical field:
The present invention relates to electric power safety and be equipped with earth leakage protective device, belong to low tension appliance field, particularly to earth leakage protective
Device double test circuit and method of testing.
Background technology
In traditional electrical power distribution system, earth leakage protective device is the most effective outfit preventing accident of human electric shock, so
Seem now the place device earth leakage protective device of each electricity consumption.But after An Zhuaning and be not equal to be perfectly safe or forever pacify
Entirely, earth leakage protective device is the same with other electrical equipment, the when of also having damage, or makes it have the tripping operation of safety protection function because of aging
Heavy, if so it not being carried out regular functional check, once earth leakage protective device breaks down, cannot be effective
Its leakage tripping protection act of implementation, be also easy for the electric shock accidents caused danger.See Fig. 1, existing earth leakage protective device
Functional check method is one leakage current of simulation, passes through the electricity at earth leakage protective device input power supply Yu output end power
Gas bypasses, and this electric current can make the ZCT inside earth leakage protective device unbalance, if this electric current reaches rated trip current amount
(generally 30mA), earth leakage protective device will trip.
" earth leakage protective device safety monitor regulation " the 39th article of regulation according to country's Ministry of Labour's nineteen ninety issue is to running
In earth leakage protective device must carry out at least checking once every month, test earth leakage protective device quality, protect Electrical Safety.
As the explanation of Fig. 1, the test button 7 (referred to herein as first that current Household electricity leakage protection device RCD only one of which is normally opened
Test button), a current limitation resistor 6 of connecting, input power 1 and the out-put supply 5 of earth leakage protective device is accessed at they two ends
Terminals, once trigger test button 7, flow through button and resistance 30mA simulation leakage current will make in earth leakage protective device
The current differential of head live wire and zero line increases 30mA, and its ZCT 4 the most just occurs serious unbalance, this is unbalance electric signal warp
Crossing amplifier 3 to amplify, its electric current flows to the solenoid of detacher 2 and produces strength magnetic field, and magnetic pull makes detacher unclamp load
Having the contact point of power supply, the most therefore earth leakage protective device trips.
Because only that a test button simulates a rated trip leakage current value, test earth leakage protective device and answering
Can or can not trip during this tripping operation, and the little electric leakage of neither one is tested this earth leakage protective device and can or can not be continued when not tripping
Keep stable not trip, do not have the tripping operation of allergy to react.
Second, user cannot know whether the load Load being connected on earth leakage protective device outfan has low value with its wiring
Electric electrical leakage quantity, this little electric leakage is because be not up to specified leakage current at ordinary times so not making earth leakage protective device trip, and user is also
Just it is unable to find out the existence of little electric leakage, but it is likely to send out at any time because of the operating conditions and the change of environment that load
Raw size variation, the least electric leakage is increased close to the rated current that trips, and earth leakage protective device will react tripping operation, cuts off and bears
The power supply supply carried, this is a hidden danger.Earth leakage protective device itself is the most sensitive and has little electric leakage and all can make leakage in load wiring
Non-electricity protector trips at random and cuts off the electricity supply, and affects the reliability that power supply is powered, and brings great inconvenience to live and work.
The button of Household electricity leakage protection device only one of which test at present, does not test key indicator lamp.
Summary of the invention
It is desirable to provide a kind of electric power safety is equipped with test circuit and the method for testing of earth leakage protective device state, pass through
First and second test buttons are worked in coordination, and composition is double tests button, it is achieved onsite application person and electrician can more accurately more reliably
Speculate the duty of earth leakage protective device, more preferably solve the potential problem of two above-mentioned use earth leakage protective devices.
A kind of earth leakage protective device double test circuit, including the first test circuit, also includes being in parallel with the first test circuit
The second test circuit, the second test button SW2, the second test operation display lamp that the second test circuit includes being sequentially connected in series
LED2 and analog current limiting resistance R2, the most also one with the diode D2 of LED2 reverse parallel connection.
Above-mentioned a kind of earth leakage protective device double test circuit, its of the first test circuit and the second test circuit inputs jointly
The zero line common output end of end connection power input then connects the live wire of load outputs.
Above-mentioned a kind of earth leakage protective device double test circuit, the first test circuit includes the first test button SW1 series connection one
Individual current limitation resistor.
Above-mentioned a kind of earth leakage protective device double test circuit, the second test circuit will simulate generation one when being triggered
Low value leaks electricity, and electrical leakage quantity is the 40% to 49% of the rated trip leakage current of earth leakage protective device, for testing earth leakage protective device
Tripping operation reaction.
Above-mentioned a kind of earth leakage protective device double test circuit, also includes earth leakage protective device, and this earth leakage protective device is at response volume
Surely trip tripping operation response time of leakage current is 0.2 second or less.But to the low leakage crossing rated trip leakage current half
Electricity is not have any trip operation.
Above-mentioned a kind of earth leakage protective device double test circuit, the first test button SW1 will be to being matched when being triggered
Earth leakage protective device inside the electric leakage of one 30mA of breadboardin, due to specified equal to earth leakage protective device of this simulation electrical leakage
Tripping operation electrical leakage, and make earth leakage protective device play tripping operation reaction and cut off its out-put supply.
Above-mentioned a kind of earth leakage protective device double test circuit, the first test button SW1, once trigger, flows through the first test
The 30mA simulation leakage current of button and resistance will make the current differential of live wire and zero line inside earth leakage protective device increase 30mA,
The most just there is serious unbalance in its ZCT, electric signal that this is unbalance is amplified through amplifier, and its electric current flows to detacher
Solenoid produces strength magnetic field, and magnetic pull makes detacher unclamp the contact point being loaded with power supply, and the most therefore earth leakage protective device jumps
Lock.
A kind of method of testing of earth leakage protective device double test circuit, including following testing procedure:
Step one, the first test button of earth leakage protective device, being once triggered will be in the earth leakage protective device matched
The electric leakage of one 30mA of breadboardin of head, makes earth leakage protective device play tripping operation reaction and cut off its out-put supply, if electric leakage
Protector does not react, and represents this earth leakage protective device poor response and the quickest to electric leakage, and needs inspection further；
Step 2, the second test circuit include the second test button of an open type (NO), and it is once pressed, one
The simulation electric leakage of low value just produces, and electrical leakage quantity is the 40% to 49% of the rated trip leakage current of earth leakage protective device, if electric leakage
What load the outfan of protector is not taken over and trip phenomenon is occurred, represents that the situation of earth leakage protective device own is unstable, and sensitivity is too
High easily misoperation, needs to check further, if the best earth leakage protective device of state is connected to load, and to the second test
Button has tripping operation reaction, then it represents that load and its wiring are with the presence of little electric leakage, it is also desirable to further electric checking.
The method of testing of above-mentioned earth leakage protective device double test circuit, if the first test before is pressed by earth leakage protective device
Key has tripping operation reaction not to react the second test button, means that earth leakage protective device state is normal, the wiring of its outfan
The best with load.
The method of testing of above-mentioned earth leakage protective device double test circuit, the first test button SW1 in the first test circuit
When being pressed, owing to there is the current-limiting resistance in alternating voltage and circuit at these circuit two ends, an about 30mA (virtual value, RMS)
Simulation electric leakage just occurs in this first test circuit, and the live wire inside earth leakage protective device is the most corresponding to the current differential of zero line
There is same current waveform in ground, and owing to this current differential reaches the specified electrical leakage of the tripping operation (30mA) of earth leakage protective device, electric leakage is protected
Protect the therefore serious unbalance of the ZCT inside device, trigger electrical apparatus release tripping operation and cut off the electricity supply；
When earth leakage protective device is properly functioning, and when the second test button SW2 in the second test circuit is pressed, this electricity
Current-limiting resistance (16K ohm) in the alternating current power supply (220V) at two ends, road and circuit just produces a simulation electric leakage, its current value
For 13.8mA (virtual value, RMS), the most correspondingly there is same current with the current differential of zero line in the live wire inside earth leakage protective device
Waveform, but the half of the specified electrical leakage of the tripping operation (30mA) of earth leakage protective device it is not up to due to this current differential, so will not be right
The earth leakage protective device not connecing load produces trip operation.
If the live wire of the wiring of the outfan of earth leakage protective device or electric appliance load occurs there is little electric leakage over the ground, such as
14mA, the simulation low value electric leakage that triggering the second test button is occurred will be with the live wire electric leakage phase actually occurring at cloth linear load
Adding, and make the live wire inside earth leakage protective device and neutral line current difference increase accordingly, once this current differential is close to tripping operation volume
Determining electrical leakage (30mA), earth leakage protective device will trip.
When second test button SW2 be pressed triggering lower valued analog electric leakage flow through display lamp LED2, LED2 with regard to build-up of luminance indicate.
As in figure 2 it is shown, the first test button of earth leakage protective device, being once triggered will be to the earth leakage protective device matched
The electric leakage of one 30mA of breadboardin of the inside, makes earth leakage protective device play tripping operation reaction and cut off its out-put supply.If leakage
Non-electricity protector does not react, and represents this earth leakage protective device poor response to electric leakage, the quickest, and needs to check further.
Also as in figure 2 it is shown, the second test keying method of the present invention is exactly the first test electricity at earth leakage protective device
A upper new analogous circuit in parallel on road, claims the second test circuit.
Second test circuit includes the second test button of an open type (NO), and it is once pressed, a low value
Simulation electric leakage just produces, and electrical leakage quantity is the 40% to 49% of the rated trip leakage current of earth leakage protective device, if earth leakage protective device
Outfan do not take over what load and trip phenomenon occur, represent that the situation of earth leakage protective device own is unstable, sensitivity is the highest easily
Misoperation, needs to check further.If the best earth leakage protective device of state is connected to load, and has the second test button
Tripping operation reaction, then it represents that load and its wiring are with the presence of little electric leakage, it is also desirable to further electric checking.
If the first test button before is had tripping operation reaction not to react the second test button by earth leakage protective device,
Meaning that earth leakage protective device state is normal, wiring and the load of its outfan are the best.In a word, we can be according to this pair of test
The tripping operation of button whether reaction, learns following reliable the most comprehensive earth leakage protective device situation
The present invention also provides for testing display lamp, and display the second test button does mode of operation and shows, promotes user and survey
The interpersonal interface of examination keypress function.
Accompanying drawing explanation
Fig. 1 is traditional single phase earth leakage protective device internal circuit configuration and load wiring schematic diagram；
Fig. 2 is earth leakage protective device of the present invention double test button scheme explanation figure；
Fig. 3 is the circuit embodiments that the present invention tests double keying method；
Fig. 4 is present invention current waveform after triggering the first test button；
Fig. 5 is present invention current waveform after triggering the second test button；
Fig. 6 is that the present invention is at load live wire Leaked Current of Line to Ground 14mA schematic diagram；
Fig. 7 tests, second, live wire and the current differential of zero line that button SW2 is triggered by the present invention.
Detailed description of the invention
Below in conjunction with examples of implementation and accompanying drawing, the present invention is described in further detail and explains, it will be appreciated that
Described herein it is embodied as only in order to explain the inventive method, but embodiments of the present invention are not limited to this embodiment
Son.
As Fig. 1 is to shown in 7, and a kind of earth leakage protective device double test circuit, including the first test circuit a, with the first test electricity
The second test circuit b that road a is in parallel, the second test circuit b include the second test button SW2, the second test being sequentially connected in series
Tutorial light LED2 and analog current limiting resistance R2, the most also one with the diode D2 of LED2 reverse parallel connection.
Its common input end of first test circuit a and the second test circuit b connects power supply input zero line and jointly exports
End connects the live wire of load output.
First test circuit a includes first test button SW1 one current limitation resistor of series connection.
Second test circuit b will simulate one low value electric leakage (13.8mA) of generation when being triggered, and electrical leakage quantity is electric leakage
The 40% to 49% of the rated trip leakage current of protector, for testing the tripping operation reaction of earth leakage protective device.
Also including earth leakage protective device, this earth leakage protective device in the tripping operation response time of response rated trip leakage current is
0.2 second or shorter, but it is not have any trip operation to the low electric leakage crossing rated trip leakage current half.
First test button SW1 will be to the breadboardin inside the earth leakage protective device matched when being triggered
The electric leakage of 30mA, owing to this simulation electrical leakage is equal to the rated trip electrical leakage of earth leakage protective device, and makes earth leakage protective device take-off
Lock reacts and cuts off its out-put supply.
First test button SW1, once trigger, just flows through the 30mA simulation leakage current of the first test button and resistance
The current differential of live wire and zero line inside earth leakage protective device can be made to increase 30mA, the most just there is serious unbalance in its ZCT,
Electric signal that this is unbalance is amplified through amplifier, and its electric current flows to the solenoid of detacher and produces strength magnetic field, magnetic pull
Making detacher unclamp the contact point being loaded with power supply, the most therefore earth leakage protective device trips.
A kind of method of testing of earth leakage protective device double test circuit, including following testing procedure:
Step one, the first test button of earth leakage protective device, being once triggered will be in the earth leakage protective device matched
Breadboardin one 30mA or higher electric leakage of head, makes earth leakage protective device play tripping operation reaction and cut off its out-put supply, as
Really earth leakage protective device does not react, and represents this earth leakage protective device poor response and the quickest to electric leakage, and needs to examine further
Look into；
Step 2, the second test circuit include the second test button of an open type (NO), and it is once pressed, one
The simulation electric leakage of low value just produces, and electrical leakage quantity is between the 40% to 49% of the rated trip leakage current of earth leakage protective device, if
What load the outfan of earth leakage protective device is not taken over and trip phenomenon is occurred, represents that the situation of earth leakage protective device own is unstable, quick
The easy misoperation of Du Taigao, needs to check further.If the best earth leakage protective device of state is connected to load, and to second
Test button has tripping operation reaction, then it represents that load and its wiring are with the presence of little electric leakage, it is also desirable to further electric checking.
If the first test button before is had tripping operation reaction not to react the second test button by earth leakage protective device,
Meaning that earth leakage protective device state is normal, wiring and the load of its outfan are the best.
When the first test button SW1 in first test circuit is pressed, owing to there are alternating voltage and electricity in these circuit two ends
Current-limiting resistance in road, the simulation electric leakage of an about 30mA (virtual value, RMS) just occurs in this first test circuit, leakage
The most correspondingly there is same current waveform, owing to this current differential reaches with the current differential of zero line in live wire inside non-electricity protector
The specified electrical leakage of the tripping operation (30mA) of earth leakage protective device, the therefore serious unbalance of the ZCT inside earth leakage protective device, triggers
Electrical apparatus release tripping operation is cut off the electricity supply；
When earth leakage protective device is properly functioning, and when the second test button SW2 in the second test circuit is pressed, this electricity
Current-limiting resistance (16K ohm) in the alternating current power supply (220V) at two ends, road and circuit just produces a simulation electric leakage, its current value
For 13.8mA (virtual value, RMS), the most correspondingly there is same current with the current differential of zero line in the live wire inside earth leakage protective device
Waveform, but the half of the specified electrical leakage of the tripping operation (30mA) of earth leakage protective device it is not up to due to this current differential, so will not be right
The earth leakage protective device not connecing load produces trip operation.
If the live wire of the wiring of the outfan of earth leakage protective device or electric appliance load occurs there is the little electric leakage of 14mA over the ground (such as figure
The c of 6), trigger second test button (a point of Fig. 7 is to b point) occurred simulation low value electric leakage will with actually occur at wiring
The live wire electric leakage of load is added, and makes the live wire inside earth leakage protective device and neutral line current difference increase (d point to e accordingly
Point), once this current differential is close to the specified electrical leakage (30mA) that trips, and earth leakage protective device will trip (the b point of Fig. 7 and e point).
When second test button SW2 be pressed triggering lower valued analog electric leakage flow through display lamp LED2, LED2 with regard to build-up of luminance indicate.
One ball bearing made being embodied as of the second test keying method of the present invention is as shown in Figure 3.Circuit includes one
Individual test button SW2, connect an analog current limiting resistance R2 and test operation display lamp LED2, then with one two pole of LED2
Pipe D2 reverse parallel connection.Whole second test circuit in parallel is on the first test circuit.This two parallel circuit while being connected on electric leakage
The zero line (N1) of the input power supply of protector, the another side of circuit is then with the live wire of output end power of earth leakage protective device
(L2) it is connected.
Its protection merit of properly functioning and implementation of the circuit of the second test button in Fig. 3 earth leakage protective device to being arranged in pairs or groups
Can not have any impact.The same with original first test button, the contact point of the second test button SW2 is open type
(NO), if be not pressed, the power supply to test circuit two ends is not constitute electric loop, does not has electric current to occur at this test electricity
Lu Shang, the most just entirely without electric energy loss.
As shown in Figure 4, when the first test button SW1 in the first test circuit is pressed (a point of upper figure in Fig. 4),
Owing to there is the current-limiting resistance in alternating voltage and circuit at these circuit two ends, the simulation of an about 30mA (virtual value, RMS) is just leaked electricity
Occurring in this first test circuit, the most correspondingly there is phase with the current differential of zero line in the live wire inside earth leakage protective device
Same current waveform (figure below in Fig. 4), owing to this current differential reaches the specified electrical leakage of the tripping operation (30mA) of earth leakage protective device, electric leakage
ZCT inside protector therefore serious unbalance, triggers electrical apparatus release tripping operation and cuts off the electricity supply (b and the d point in Fig. 4).
When earth leakage protective device is properly functioning, and (Fig. 5 when the second test button SW2 in the second test circuit is pressed
In a point of upper figure), the current-limiting resistance (16K ohm) in the alternating current power supply (220V) at these circuit two ends and circuit just produces one
Simulation electric leakage, its current value is 13.8mA (virtual value, RMS), and the current differential of the live wire inside earth leakage protective device and zero line is also
Same current waveform (figure below in Fig. 5) correspondingly occurs, but to be not up to the tripping operation of earth leakage protective device specified due to this current differential
The half of electrical leakage (30mA), so trip operation will not be produced to the earth leakage protective device not connecing load.
As shown in the lower left corner of Fig. 6, if the live wire generation of the wiring of the outfan of earth leakage protective device or electric appliance load is right
There are little electric leakage c, such as 14mA in ground, refer to Fig. 7, triggers the mould that the second test button (a point of the upper figure of Fig. 7 is to b point) is occurred
Intend low value electric leakage to leak electricity with the live wire actually occurring at cloth linear load and be added, and make live wire inside earth leakage protective device and
Neutral line current difference increases (the d point of Fig. 7 figure below is to e point) accordingly, and once this current differential is close to the specified electrical leakage that trips
(30mA), earth leakage protective device will trip (the b point in Fig. 7 and e point).
On the right of Fig. 6, when second test button SW2 be pressed triggering lower valued analog electric leakage flow through display lamp LED2,
LED2 indicates with regard to build-up of luminance.
At operation secure context, owing to the second test key circuit and the first test circuit are equally collected in earth leakage protective
The plastic insulation housings of device, it is also plastics that the hands of the first test button and the second test button touches head, so scene
User and electrician are entirely without the problem at operation secure context.
The foregoing is only the preferable possible embodiments of the present invention, the non-patent protection model therefore limiting to the present invention
Enclose.In addition to the implementation, the present invention can also have other embodiments.The skill that all employing equivalents or equivalent transformation are formed
Art scheme, all falls within the protection domain of application claims.The present invention can pass through or use existing without the technical characteristic described
There is technology to realize, do not repeat them here.
Claims (10)
1. earth leakage protective device double test circuit, including the first test circuit (a), it is characterised in that: also include surveying with first
The second test circuit (b) that examination circuit (a) is in parallel, the second test circuit (b) includes the second test button being sequentially connected in series
SW2, the second test operation display lamp LED2 and analog current limiting resistance R2, the most also one with the two of LED2 reverse parallel connection
Pole pipe D2.
A kind of earth leakage protective device the most according to claim 1 double test circuit, it is characterised in that: the first test circuit (a)
Connect power supply input zero line with its input of the second test circuit (b), outfan connects the live wire loading output.
A kind of earth leakage protective device the most according to claim 1 double test circuit, it is characterised in that: the first test circuit (a)
Including first test button SW1 one current limitation resistor R1 of series connection.
A kind of earth leakage protective device the most according to claim 1 double test circuit, it is characterised in that: the second test circuit (b)
Generation one low value electric leakage will be simulated when being triggered, electrical leakage quantity be the rated trip leakage current of earth leakage protective device 40% to
49%, for testing the tripping operation reaction of earth leakage protective device.
A kind of earth leakage protective device the most according to claim 1 double test circuit, it is characterised in that: also include earth leakage protective
Device, this earth leakage protective device is 0.2 second or less in the tripping operation response time of response rated trip leakage current.
A kind of earth leakage protective device the most according to claim 3 double test circuit, it is characterised in that: the first test button SW1
Earth leakage protective device will be made to rise the electric leakage of one 30mA of breadboardin inside the earth leakage protective device matched when being triggered
Tripping operation is reacted and cuts off its out-put supply.
A kind of earth leakage protective device the most according to claim 4 double test circuit, it is characterised in that: the first test button SW1
Once trigger, the 30mA simulation leakage current flowing through button and resistance will make live wire and the electricity of zero line inside earth leakage protective device
Stream difference increases 30mA, and its ZCT the most just occurs serious unbalance, and electric signal that this is unbalance is amplified through amplifier, its electricity
Stream flows to the solenoid of detacher and produces strength magnetic field, and magnetic pull makes detacher unclamp the contact point being loaded with power supply, electric leakage
The most therefore protector trips.
8. a method of testing for earth leakage protective device double test circuit, including following testing procedure:
Step one, earth leakage protective device first test button, be once triggered will be to the earth leakage protective device matched inside
The electric leakage of one 30mA of breadboardin, makes earth leakage protective device play tripping operation reaction and cut off its out-put supply, if earth leakage protective
Device does not react, and represents this earth leakage protective device poor response and the quickest to electric leakage, and needs inspection further；
Step 2, the second test circuit include the second test button of an open type (NO), and it is once pressed, a low value
Simulation electric leakage just produce, electrical leakage quantity is the 40% to 49% of the rated trip leakage current of earth leakage protective device, if earth leakage protective
What load the outfan of device is not taken over and trip phenomenon is occurred, represents that the situation of earth leakage protective device own is unstable, sensitivity too Gao Rong
Easily misoperation, needs to check further, if the best earth leakage protective device of state is connected to load, and to the second test button
There is tripping operation reaction, then it represents that load and its wiring are with the presence of little electric leakage, it is also desirable to further electric checking.
The method of testing of earth leakage protective device the most according to claim 8 double test circuit, if earth leakage protective device is to before
The first test button have tripping operation reaction that the second test button is not reacted, mean that earth leakage protective device state is normal, its
Wiring and the load of outfan are the best.
The method of testing of the double test circuit of earth leakage protective device the most according to claim 8 or claim 9, in the first test circuit
When button SW1 is pressed, owing to there is a current-limiting resistance in alternating voltage and circuit at these circuit two ends, 30mA (virtual value,
RMS) simulation electric leakage just occurs in this first test circuit, the live wire inside earth leakage protective device and the current differential of zero line
Same current waveform the most correspondingly occurs, owing to this current differential reaches the specified electrical leakage of the tripping operation (30mA) of earth leakage protective device,
ZCT inside earth leakage protective device therefore serious unbalance, triggers electrical apparatus release tripping operation and cuts off the electricity supply；
When earth leakage protective device is properly functioning, and when the second test button SW2 in the second test circuit is pressed, this circuit two
Current-limiting resistance (16K ohm) in the alternating current power supply (220V) of end and circuit just produces a simulation electric leakage, and its current value is
13.8mA (virtual value, RMS), the most correspondingly there is same current ripple with the current differential of zero line in the live wire inside earth leakage protective device
Shape, but the half of the specified electrical leakage of the tripping operation (30mA) of earth leakage protective device it is not up to due to this current differential, so will not be to not having
The earth leakage protective device connecing load produces trip operation.
If the live wire of the wiring of the outfan of earth leakage protective device or electric appliance load occurs to have over the ground little electric leakage, trigger the second test
The simulation low value electric leakage that button is occurred will be leaked electricity with the live wire actually occurring at cloth linear load and is added, and makes in earth leakage protective
Live wire and neutral line current difference inside device increase accordingly, and once this current differential is close to the specified electrical leakage (30mA) that trips, leakage
Non-electricity protector will trip.
When second test button SW2 be pressed triggering lower valued analog electric leakage flow through display lamp LED2, LED2 with regard to build-up of luminance indicate.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610613499.2A CN106291175A (en) | 2016-07-29 | 2016-07-29 | Earth leakage protective device double test circuit and method of testing |
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| CN201610613499.2A CN106291175A (en) | 2016-07-29 | 2016-07-29 | Earth leakage protective device double test circuit and method of testing |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2840400Y (en) * | 2005-11-01 | 2006-11-22 | 黄华道 | Leakage protection socket service life stop display circuit |
| CN201508397U (en) * | 2009-09-28 | 2010-06-16 | 上海施耐德低压终端电器有限公司 | A testing device of a leakage protector for a small-sized circuit breaker |
| CN102243286A (en) * | 2011-05-17 | 2011-11-16 | 李英岱 | Apparatus for detecting and displaying grounding state of equipment or socket |
| CN103091597A (en) * | 2013-01-16 | 2013-05-08 | 乐清市先驱自动化设备有限公司 | Leakage switch calibrator |
| CN103178492A (en) * | 2013-03-28 | 2013-06-26 | 余姚市嘉荣电子电器有限公司 | Leakage protector with electrified earth line protection function |
| CN204789793U (en) * | 2015-06-18 | 2015-11-18 | 中石化石油工程技术服务有限公司 | Earth -leakage protector's state verification ware under explosion -proof environment |
| CN205910273U (en) * | 2016-07-29 | 2017-01-25 | 许良炎 | Two test circuit of earth -leakage protector |
-
2016
- 2016-07-29 CN CN201610613499.2A patent/CN106291175A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2840400Y (en) * | 2005-11-01 | 2006-11-22 | 黄华道 | Leakage protection socket service life stop display circuit |
| CN201508397U (en) * | 2009-09-28 | 2010-06-16 | 上海施耐德低压终端电器有限公司 | A testing device of a leakage protector for a small-sized circuit breaker |
| CN102243286A (en) * | 2011-05-17 | 2011-11-16 | 李英岱 | Apparatus for detecting and displaying grounding state of equipment or socket |
| CN103091597A (en) * | 2013-01-16 | 2013-05-08 | 乐清市先驱自动化设备有限公司 | Leakage switch calibrator |
| CN103178492A (en) * | 2013-03-28 | 2013-06-26 | 余姚市嘉荣电子电器有限公司 | Leakage protector with electrified earth line protection function |
| CN204789793U (en) * | 2015-06-18 | 2015-11-18 | 中石化石油工程技术服务有限公司 | Earth -leakage protector's state verification ware under explosion -proof environment |
| CN205910273U (en) * | 2016-07-29 | 2017-01-25 | 许良炎 | Two test circuit of earth -leakage protector |
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Application publication date: 20170104 |