CN107453322A - A kind of explosion-proof controlling switch of local strange land double reset test self-insurance electric leakage - Google Patents
A kind of explosion-proof controlling switch of local strange land double reset test self-insurance electric leakage Download PDFInfo
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- CN107453322A CN107453322A CN201710935081.8A CN201710935081A CN107453322A CN 107453322 A CN107453322 A CN 107453322A CN 201710935081 A CN201710935081 A CN 201710935081A CN 107453322 A CN107453322 A CN 107453322A
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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
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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
-
- 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
- H02H3/044—Checking correct functioning of protective arrangements, e.g. by simulating a fault
-
- 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
- H02H3/06—Details with automatic reconnection
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Abstract
The present invention provides a kind of local strange land double reset test self-insurance electric leakage explosion-proof controlling switch, is related to the electric leakage protection technology field of explosion-proof electrical distribution box.Including power supply processing circuit, sample circuit, test circuit, signal processing circuit, signal judging circuit, driving and malfunction coefficient and reset circuit, leakage data output circuit and malfunction output circuit；Power supply processing circuit provides dc source for controlling switch, sample circuit output end connects signal processing circuit, test circuit driving sample circuit work, signal processing circuit output end connects signal judging circuit and leakage data output circuit, signal judging circuit output end connection driving and malfunction coefficient and reset circuit.The present invention can be used for any single-phase or threephase load occasion, the insulation status of electric equipment is monitored, it can be tested and be resetted by live locally and remotely strange land two ways, detection of electrical leakage flexibility is high, quickly and easily can carry out restorability change to control.
Description
Technical field
The present invention relates to the electric leakage protection technology field of explosion-proof electrical distribution box, more particularly to a kind of local-strange land double reset-
Test the explosion-proof controlling switch of self-insurance electric leakage.
Background technology
In inflammable, explosive place, such as：The places such as oil, chemical industry, medicine, grain, military project, satellite and MISSILE LAUNCHING, warp
The dangerous gas of various inflammable, explosive tools and steam can be often run into, as these have the factories and miness of certain operational danger
Enterprise, scene can all be furnished with corresponding explosion-proof electrical distribution box, convenient to circuit switching action for reasonable distribution electric energy, directly perceived aobvious
Show the conducting state of circuit, but because insulation damages and unexpected electric leakage threaten the life security of people often.In order to prevent
Electric shock accidents brings personal injury to field personnel, reduces business economic loss, timely and effectively provides necessary electric leakage
Protection device is the requisite measure that should be taken.Most of current existing earth leakage protective device can only realize scene reset, test behaviour
Make, and strange land can not be realized and reset, test.If for example, in explosion-proof tank as installation after earth leakage protective device, once leak
When electric protection is tripped, site operation personnel needs the scene explosion-proof case lid of opening to carry out reset operation；The test work of RCCB
The progress (the general cycle is to carry out once one to two moon) in cycle is also required to, and test job is both needed to execute-in-place people every time
Member opens explosion-proof case lid and carried out.It is known that the disassembling operations of explosion-proof electrical distribution box are extremely complex, so virtually add
The working strength of operating personnel, if run into the casing for needing delay to unpack operation, operation is just more cumbersome, is both to have increased
Operation difficulty reduces operating efficiency again.Now with modern industrial enterprises production automation trend, the extensive centralized Control of equipment
As main flow, in this case, the self-insurance with local-strange land double reset-test function leaks electricity explosion-proof controlling switch more
There is its Practical significance.
The content of the invention
The technical problem to be solved in the present invention is to be directed to above-mentioned the deficiencies in the prior art, there is provided a kind of local-strange land is dual
Reset-explosion-proof the controlling switch of test self-insurance electric leakage, available for any single-phase or threephase load occasion, the insulation shape to electric equipment
Condition is monitored, is cut off the electricity supply in time, alarm of being concurrently out of order；After troubleshooting can by live and remote two ways come
Reset, the flexibility of detection of electrical leakage is high, and the change of restorability can be quickly and easily carried out to control.
In order to solve the above technical problems, the technical solution used in the present invention is：
A kind of local-strange land double reset-explosion-proof the controlling switch of test self-insurance electric leakage, including power supply processing circuit, sampling
Circuit, test circuit, signal processing circuit, signal judging circuit, driving and malfunction coefficient and reset circuit, leakage data are defeated
Go out circuit and malfunction output circuit；
The input connection major loop AC power of power supply processing circuit, output ± DC12v power supplys, output end connect other
Need the power input of each circuit of dc source, there is provided dc source；
Sample circuit is used to the signal voltage of different sensitivity being adjusted to same magnitude of voltage, output AC voltage detection letter
Number, including sampling circuit of electric leakage and sensitivity gear selection circuit, sampling circuit of electric leakage by a zero sequence current mutual inductor with
Major loop connection carries out electric leakage sampling, the output end connection sensitivity gear selection circuit of sampling circuit of electric leakage, according to actual feelings
Condition selects sensitivity gear, the signal input part of the output end connection signal processing circuit of sensitivity gear selection circuit；
Whether the action that test circuit is used to detect the explosion-proof controlling switch is normal, and simulates and to form a leakage current,
Driving sample circuit work, test circuit includes the local test unit and remote-site testing unit that are in parallel, and the one of test circuit
A phase firewire after end penetrates zero sequence current mutual inductor with major loop AC power is connected, and the other end and major loop AC power are not
Penetrate the zero line connection of zero sequence current mutual inductor；
Signal processing circuit is used to carry out at rectification, amplification and filtering the alternating voltage detection signal of sample circuit output
Reason, export d. c. voltage signal, including be sequentially connected signal transacting protection circuit, full-wave rectifying circuit, voltage amplifier circuit
With L-type low pass filter, the input of the output end connection signal judging circuit of signal processing circuit and leakage data output
The input of circuit；
Signal judging circuit be used for realize to detection leakage current and standard value multilevel iudge, its output end connection driving and
The input of malfunction coefficient and reset circuit；
Leakage data output circuit is used for the size of the specific leakage current of quantitative display；
Driving and malfunction coefficient include major loop drive part, malfunction coefficient part and reset portion with reset circuit, main
Loop drive part is used for the control for driving A.C. contactor to carry out main circuit power break-make by auxiliary reclay, malfunction coefficient
Part is used to carry out troubleshooting and display according to the output of signal judging circuit, and reset portion is used for after troubleshooting to this
Circuit is resetted, and reenters detection state, in-between relay contact output end connecting fault state output circuit；Wherein
Reset portion includes local reset unit and strange land reset unit；
Malfunction output circuit is used to export leak current fault status signal.
Further, power supply processing circuit specifically includes transformer B1, rectification circuit U0, protection diode D5, D6, luminous
Diode D7, D8, electric capacity C1-C6, resistance R1, R2 and three terminal regulator U1, U2；Rectification circuit U0 is formed for diode D1-D4
Rectifier bridge；The AC power of major loop is changed into AC30V by transformer B1, and two input connects the AC power of major loop
Live wire L and zero line N, two output ends connection rectification circuit U0 two inputs；Rectification circuit U0 two output ends point
Not Lian Jie electric capacity C1 and C3 parallel filtering circuit input and electric capacity C2 and C4 parallel filtering circuit input；Two-way
The input of filter circuit is also connected with three terminal regulator U1 and U2 input respectively, and three terminal regulator U1 and U2 output end are made
For the output end of power supply processing circuit, output ± DC12V power supplys；Protection diode D5, D6 is connected in parallel on three terminal regulator U1 respectively
Input and output between three terminal regulator U2 input and output；Electric capacity C5, C6 be connected in parallel on respectively three terminal regulator U1 and
Between three terminal regulator U2 output end and ground, light emitting diode D7 is connected in parallel on electric capacity C5 both ends after being connected with resistance R1, lights
Diode D8 is connected in parallel on electric capacity C6 both ends, light emitting diode D7, D8 conduct ± DC12V power supply indicators after being connected with resistance R2.
Further, sample circuit specifically includes zero sequence current mutual inductor LH, potentiometer VR2-VR4, gear selecting switch K, electricity
Hinder R18；Gear selecting switch K is a throw switch of hilted broadsword four, for sensitivity selection of leaking electricity, including three different sensitivity switch choosings
It is adjustable in the range of 30mA-5000mA to select contact, non-detection sensitivity contact and total terminals, detection sensitivity；Major loop
Triple line and N phase lines also cross zero sequence current mutual inductor LH primary winding, zero sequence current mutual inductor LH secondary coil
Positive and negative both ends are connected in parallel on resistance R18 both ends, the negativing ending grounding of zero sequence current mutual inductor LH secondary coil；Potentiometer VR2-
VR4 is connected in parallel on resistance R18 both ends by its fixing end, and potentiometer VR2-VR4 movable end connects gear selecting switch K's respectively
Three different sensitivity switch selection contacts, gear selecting switch K not detection sensitivity contact ground；Gear selecting switchs K total wiring
The output end output AC voltage detection signal as sample circuit is held, and is connected with the signal input part of signal processing circuit.
Further, test circuit specifically includes local test button ST, remote-site testing button ST ' and resistance R0；It is local
One end after testing button ST normally opened contacts are in parallel with remote-site testing button ST ' normally opened contacts is with passing through zero sequence current mutual inductor LH
The phase firewire connection of the major loop of primary side, the other end are connected with resistance R0 one end, and the resistance R0 other end is not with wearing
Cross the N phase lines connection of zero sequence current mutual inductor LH primary sides.
Further, the signal transacting protection circuit in signal processing circuit includes the protection diode of two reverse parallel connections
D13 and D14, one end of the parallel-connection structure are the signal input part of signal processing circuit, and the other end is grounded；Full-wave rectifying circuit bag
Include operational amplifier U7, U8, resistance R11-R17 and diode D11-D12；Voltage amplifier circuit includes operational amplifier U6, electricity
R8-R10 and rheostat VR1 is hindered, rheostat VR1 is zero potentiometer；L-type low pass filter includes the resistance R7 and electricity being in series
The tie point for holding C7, resistance R7 and electric capacity C7 is the output end of signal processing circuit, exports d. c. voltage signal.
Further, signal judging circuit specifically includes voltage-stablizer U4, resistance R6 and voltage comparator U3, voltage comparator
U3 electrode input end is the input of signal judging circuit, and voltage comparator U3 output end is the output of signal judging circuit
End；Voltage-stablizer U4 negativing ending grounding, voltage-stablizer U4 anode and resistance R6 one end are both connected to voltage comparator U3 negative pole
Input, resistance R6 other end connection voltage comparator U3 positive source, voltage comparator U3 power supply positive and negative electrode difference
Connect ± DC12V the power supplys of power supply processing circuit output.
Further, leakage data output circuit specifically includes operational amplifier U5 and external display instrument V；Computing is put
Big device U5 electrode input end is the input of leakage data output circuit, operational amplifier U5 negative input directly with
Operational amplifier U5 output end connection, operational amplifier U5 output end connection display instrument V one end, display instrument V's
The other end is grounded.
Further, display instrument V both ends are also parallel with mV/4-20mA signal transmitting devices, and the transmitter uses
AC220V voltages are powered, for realizing that the data of remote 4-20mV signals transmit.
Further, display instrument V is provided with RS485 output interfaces, and is furnished with corresponding communication protocol, for realizing long distance
From the data remote of the RS485 communication modes of Various types of data.
Further, driving and malfunction coefficient specifically include resistance R0, R3-R5, triode T, luminous two with reset circuit
Pole pipe D9, protection diode D10, auxiliary reclay J1, A.C. contactor JC, fuse FU, local reset button SF and strange land
SR SF '；Light emitting diode D9 and resistance R3 series arm, protection diode D10, auxiliary reclay J1 coil are equal
It is in parallel with resistance R4, the first end connection+DC12V power supplys of the parallel-connection structure, the second end of the parallel-connection structure is driving and event
Barrier display and the input of reset circuit, and be connected simultaneously with resistance R5 first end and triode T colelctor electrode；Light-emitting diodes
The positive connections of pipe D9, protection diode D10 Opposite direction connections；Resistance R5 the second end while connecting triode T base stage and strange land
SR SF ' first end, triode T grounded emitter；Resistance R0 first end connection+DC12V power supplys, resistance R0's
Second end connection auxiliary reclay J1 normally opened contact first end, the auxiliary reclay J1 end of normally opened contact second connection are local multiple
The first end of position button SF normally opened contacts, the second end connection strange land SR SF ' of local reset button SF normally opened contacts are normal
Open the end of contact second；After main A.C. contactor JC coil is connected with auxiliary reclay J1 a normally-closed contact, fuse FU
It is connected on AC380V or AC220V power supplys, realizes the break-make of control loop, A.C. contactor JC main contacts is connected on
In the major loop of AC380V or AC220V power supplys, the break-make of main circuit power is realized；
Malfunction output circuit includes auxiliary reclay J1 a pair normally opened, normally-closed contacts with common port, as leakage
Electric fault output signal, for leak current fault teletransmission on-off model output end.Auxiliary reclay J1 normally opened contact closes, often
Closed contact has been broken as leak current fault, and auxiliary reclay J1 normally opened contact disconnection, normally-closed contact closure are without leak current fault.
It is using beneficial effect caused by above-mentioned technical proposal：Local provided by the invention-strange land double reset-survey
The explosion-proof controlling switch of self-insurance electric leakage is tried, is a kind of device for monitoring electric wiring electric leakage situation and disengagement failure line powering, can
For any non-explosion-proof, explosion-proof single-phase or threephase load occasion, the insulation status of electric equipment is monitored, so as to effectively
Carry out personal safety protection and the prevention of electrical fire.When electrical equipment is because of insulation damages or the unexpected human electric shock of generation,
The controlling switch can cut off the electricity supply rapidly, and send failure in time in a manner of light warning and space signal transmit,
By being equipped with different transmitter meters, leakage current value can realize a variety of space signal outputs；Provided with on-the-spot test, SR
With remote-site testing, reseting interface, remote leakage switch test, reset function are conveniently realized；Selected provided with multistage sensitivity technique
Select to switch and set and do not detect electric leakage gear, and operation can be drawn in addition, the flexibility of detection of electrical leakage can be effectively increased, detection is sensitive
It is adjustable to spend 30mA-5000mA；Reserved leakage current value display window, easily detects field apparatus leakage current situation；It is once live
Suffer from be not suitable for using earth leakage protective device occasion or it is provisional do not need earth leakage protective when, do not changing connections and device
In the case of part, the change of restorability can be quickly and easily carried out to control.
Brief description of the drawings
Fig. 1 is local provided in an embodiment of the present invention-strange land double reset-explosion-proof controlling switch function of test self-insurance electric leakage
Block diagram；
Fig. 2 is the schematic diagram of power supply processing circuit provided in an embodiment of the present invention；
Fig. 3 is the schematic diagram of sample circuit provided in an embodiment of the present invention；
Fig. 4 is the schematic diagram of signal processing circuit provided in an embodiment of the present invention；
Fig. 5 is signal judging circuit provided in an embodiment of the present invention, driving and malfunction coefficient and reset circuit, electric leakage fluxion
According to output circuit and the schematic diagram of malfunction output circuit；
Fig. 6 is the schematic diagram of test circuit provided in an embodiment of the present invention.
In figure：301st, sample circuit；401st, signal transacting protection circuit；402nd, full-wave rectifying circuit；403rd, voltage amplification
Circuit；404th, L-type low pass filter；501st, signal judging circuit；502nd, leakage data output circuit；503rd, driving and failure
Display and reset circuit；504th, malfunction output circuit.
Embodiment
With reference to the accompanying drawings and examples, the embodiment of the present invention is described in further detail.Implement below
Example is used to illustrate the present invention, but is not limited to the scope of the present invention.
A kind of local-strange land double reset-explosion-proof the controlling switch of test self-insurance electric leakage, as shown in figure 1, being functionally divided into eight
Part, respectively power supply processing circuit, sample circuit, signal processing circuit, signal judging circuit, driving and malfunction coefficient are with answering
Position circuit, leakage data output circuit, test circuit and malfunction output circuit, specifically by zero sequence current mutual inductor, friendship
Flow contactor, auxiliary reclay, button, transformer, operational amplifier, voltage comparator, voltage-stablizer, resistance, electric capacity, two poles
The devices such as pipe, rheostat, binding post, display instrument composition.Each several part circuit is arranged in a casing, and tank surface is provided with
Some binding posts, the shift knob in each several part circuit etc. are arranged on tank surface, and by each binding post and casing
The circuit devcie connection in portion.
The input connection AC220V power supplys of power supply processing circuit, output ± DC12V power supplys, output end connect other needs
The power input of each circuit of dc source, there is provided dc source, as shown in Fig. 2 specifically including transformer B1, rectification circuit
U0, protection diode D5, D6, light emitting diode D7, D8, electric capacity C1-C6, resistance R1, R2 and three terminal regulator U1, U2；Rectification
Circuit U 0 is；The rectifier bridge that pole pipe D1-D4 is formed.Transformer B1 two inputs connection AC220V live wire L and zero line N,
Two output end connection rectification circuit U0 two inputs；Rectification circuit U0 two output ends connect electric capacity C1 and C3 respectively
Parallel filtering circuit input and electric capacity C2 and C4 parallel filtering circuit input；The input of two-way filter circuit
Three terminal regulator U1 and U2 input is also connected with respectively, and three terminal regulator U1 and U2 output end are as power supply processing circuit
Output end, output ± DC12V power supplys；Protection diode D5, D6 be connected in parallel on respectively between three terminal regulator U1 input and output and
Between three terminal regulator U2 input and output；Electric capacity C5, C6 are connected in parallel on the defeated of three terminal regulator U1 and three terminal regulator U2 respectively
Go out between end and ground, light emitting diode D7 is connected in parallel on electric capacity C5 both ends, light emitting diode D8 and resistance R2 after being connected with resistance R1
Electric capacity C6 both ends are connected in parallel on after series connection.The AC220V from live wire L and zero line N is changed into AC30V from transformer B1, by two poles
Pipe D1-D4 rectifications and after electric capacity C1 and C3, C2 and C4 filtering respectively enter three terminal regulator U1 and U2 respectively, output ±
DC12V power supplys, used for subsequent conditioning circuit, light emitting diode D7, D8 conduct ± DC12V power supply indicators.
Sample circuit is used to the signal voltage of different sensitivity being adjusted to same magnitude of voltage, at its output end connection signal
The signal input part of circuit is managed, as shown in figure 3, sample circuit 301 specifically includes zero sequence current mutual inductor LH, potentiometer VR2-
VR4, gear selecting switch K, resistance R18.The three-phase AC380V or single-phase AC220V outside the connection of binding post 1~4 on casing are defeated
Enter power supply, external loading is connected by binding post 5~8 after the controlling switch that the present embodiment provides, realizes electric wiring
The monitoring of electric leakage situation is handled with line fault.Gear selecting switch K is a throw switch of hilted broadsword four, and its gear selecting operation handle is by connecing
Line terminals guide to the operating outside (if outer can not also need not draw) of junction box, may be implemented in and enter line sensitivity outside casing
Selection, including three different sensitivity switch selection contacts, non-detection sensitivity contact and total terminals, detection sensitivity
30mA-5000mA is adjustable, is the adjustable extent taken according to actually detected necessity, can be slided and become according to the specific requirement of user
Potentiometric resistance is changed to determine the occurrence of three gear sensitivity, set in the present embodiment 3 kinds of sensitivity be respectively 30mA,
100mA、300mA.The A of major loop B C triple lines and N phase lines also cross zero sequence current mutual inductor LH primary winding, zero sequence
The positive and negative both ends of current transformer LH secondary coil are connected in parallel on resistance R18 both ends, zero sequence current mutual inductor LH secondary line
The negativing ending grounding of circle；Potentiometer VR2-VR4 is connected in parallel on resistance R18 both ends, potentiometer VR2-VR4 work by its fixing end
Moved end connects gear selecting switch K three different sensitivities switch selection contact, gear selecting switch K by binding post 9~11 respectively
Not detection sensitivity contact be grounded by binding post 12；Output end of the gear selecting switch K total terminals as sample circuit
Output AC voltage detection signal, and be connected by binding post 13 with the signal input part of signal processing circuit.
Current signal is transformed to voltage signal by resistance R18, then switchs K and potentiometer VR2-VR4 by gear selecting, difference
The signal voltage of sensitivity is adjusted to same magnitude of voltage in case subsequent conditioning circuit uses.If selecting switch is specified in 30mA, then
Actuation of an alarm (warning output, cutting off main circuit power) is carried out when detecting leakage current more than 30mA, other gears are by that analogy.
If switch is specified at not detection sensitivity contact, then no matter leakage current is much, equal leakage current overload alarm, and main circuit
Do not trip, this function can be used for whether there need not be unsuitable leakage with earth leakage protective occasion rapid translating or indefinite scene temporarily
Electrical circuit breakers protection equipment occasion uses.
Signal processing circuit is used to carry out rectification, amplification and filter to the alternating voltage detection signal that sample circuit 301 exports
Ripple processing, export d. c. voltage signal, including be sequentially connected signal transacting protection circuit 401, full-wave rectifying circuit 402, electricity
Press amplifying circuit 403 and L-type low pass filter 404, the input of the output end connection signal judging circuit 501 of signal processing circuit
End and the input of leakage data output circuit 503.As shown in figure 4, the signal transacting protection circuit bag of signal processing circuit
The protection diode D13 and D14 of two reverse parallel connections are included, one end of the parallel-connection structure inputs for the signal of signal processing circuit
End；Full-wave rectifying circuit includes operational amplifier U7, U8, resistance R11-R17 and diode D11-D12；Voltage amplifier circuit bag
Operational amplifier U6, resistance R8-R10 and rheostat VR1 are included, rheostat VR1 is zero potentiometer；L-type low pass filter includes
The resistance R7 and electric capacity C7 being in series, resistance R7 and electric capacity C7 tie point are the output end of signal processing circuit, export direct current
Voltage signal.The alternating voltage detection signal (the same magnitude of voltage i.e. after the adjustment of upper level sample circuit output) of input is passed through
Full-wave rectifying circuit forms pulse voltage signal, then after being amplified by voltage amplifier circuit, becomes by L-type low pass filter
For d. c. voltage signal, enter subordinate's leakage data output circuit into subordinate's signal judging circuit, another way all the way.
Signal judging circuit be used for realize to detection leakage current and standard value multilevel iudge, its output end connection driving and
The input of malfunction coefficient and reset circuit, as shown in figure 5, signal judging circuit 501 specifically include voltage-stablizer U4, resistance R6 and
Voltage comparator U3.Voltage comparator U3 electrode input end is the input of signal judging circuit, and voltage comparator U3's is defeated
Go out output end of the end for signal judging circuit；Voltage-stablizer U4 negativing ending grounding, voltage-stablizer U4 anode and resistance R6 one end are equal
It is connected to voltage comparator U3 negative input, resistance R6 other end connection voltage comparator U3 positive source, voltage
Comparator U3 power supply positive and negative electrode connects the ± DC12V power supplys of power supply processing circuit output respectively.Voltage-stablizer U4 is used to be formed surely
Fixed reference voltage, as voltage comparator U3 negative pole standard of comparison, when the output sampled signal of higher level's signal processing circuit
During into voltage comparator U3 positive poles, the signal is compared with negative pole standard of comparison, during higher or lower than standard of comparison, voltage
Comparator U3 output signal also follows height different, and so as to realize the judgement to detecting leakage current, the result of judgement is directly entered
Enter next stage driving and malfunction coefficient and reset circuit.If comparative result is low level, no leak current fault, if comparative result is
High level, then carry out malfunction coefficient.
Leakage data output circuit is used for the size of the specific leakage current of quantitative display, as shown in figure 5, leakage data is defeated
Go out circuit 502 and specifically include operational amplifier U5 and external display instrument V.Operational amplifier U5 electrode input end is leakage current
The input of data output circuit, the output end of operational amplifier U5 negative input directly with operational amplifier U5 are connected,
Operational amplifier U5 output end concatenation pointer or one end of digital indicator Table V, instrument V other end ground connection.Input signal
(input signal is quoted from signal processing circuit output end) passes through binding post 16 after operational amplifier U5 carries out impedance conversion
One end of concatenation pointer or digital indicator Table V, the instrument V other end connect DC0V by binding post 17, if by 16,17
Terminal connecting belt has the instrument of mV/4-20mA signal transmitting devices, or is directly connected to mV/4-20mA signal transmitting devices, then is equipped with
Appropriate supply voltage (the present embodiment can provide AC220V voltages) achieves that the data transmission of remote 4-20mV signals.Such as
The connection of 16,17 binding posts is exported and is furnished with the instrument of corresponding communication protocol by fruit with RS485, then is equipped with appropriate power supply
Voltage (the present embodiment can provide AC220V voltages) achieves that the data of the RS485 communication modes of remote Various types of data are remote
Pass, etc..In a word, leakage data output circuit is to provide for a flexible basic output interface, to adapt to and user
Control system carry out diversified data-linkage.
Driving and malfunction coefficient are used to carry out troubleshooting and display according to the output of signal judging circuit with reset circuit,
And circuit is resetted after troubleshooting, reenter detection state；Wherein reset circuit include local reset unit and
Strange land reset unit.As shown in figure 5, driving and malfunction coefficient specifically include resistance R0, resistance R3-R5, three with reset circuit 503
Pole pipe T, light emitting diode D9, protection diode D10, auxiliary reclay J1, A.C. contactor JC, fuse FU, local reset
Button SF and strange land SR SF '.Light emitting diode D9 and resistance R3 series arm, protection diode D10, middle relay
Device J1 coil is in parallel with resistance R4, the first end connection+DC12V power supplys of the parallel-connection structure, and the second of the parallel-connection structure
Hold for driving and the input of malfunction coefficient and reset circuit, and simultaneously with resistance R5 first end and triode T colelctor electrode
Connection；The positive connections of light emitting diode D9, protection diode D10 Opposite direction connections；Resistance R5 the second end while connecting triode T
Base stage and strange land SR SF ' first end, triode T grounded emitter；Resistance R0 first end connection+DC12V
Power supply, resistance R0 the second end connection auxiliary reclay J1 normally opened contact first end, auxiliary reclay J1 normally opened contact the
Two ends connect the first end of local reset button SF normally opened contacts, the second end connection strange land of local reset button SF normally opened contacts
The second end of SR SF ' normally opened contacts；Main A.C. contactor JC coil and an auxiliary reclay J1 normally-closed contact, melt
It is connected to after disconnected device FU series connection on AC380V or AC220V power supplys, realizes the break-make of control loop, A.C. contactor JC master touches
Point is connected in the major loop of AC380V or AC220V power supplys, and main A.C. contactor JC is driven with auxiliary reclay J1, is realized
The break-make of main circuit power.In specific implementation, if carrying major loop A.C. contactor in custom system, in the controlling switch
A.C. contactor JC can use the A.C. contactor of user to substitute；If strange land reset function, strange land SR SF ' are not needed
Substituted with shorting stub.
When the comparative result of higher level's signal judging circuit is low level (no leak current fault), triode T is not turned on, in
Between relay J1 be failure to actuate, A.C. contactor JC closure, major loop conducting, light emitting diode D9 is without display；When higher level compares knot
When fruit is high level, triode T saturation conductions, auxiliary reclay J1 is acted, and JI realizes self-insurance while drives A.C. contactor JC
Action power dump, light emitting diode D9 carry out malfunction coefficient.After troubleshooting, press local reset button SF and realize locally again
Position control operation, or press strange land SR SF ' and realize that strange land resets control operation, earth leakage protective device is reentered detection
State.
Malfunction output circuit is used to export leak current fault, as shown in the malfunction output circuit 504 in Fig. 5, bag
Auxiliary reclay J1 a pair normally opened, normally-closed contacts with common port are included, are drawn out to conduct on binding post 18,19,20 respectively
Leak current fault output signal, for leak current fault teletransmission on-off model output end.Auxiliary reclay J1 normally opened contact closure,
Normally-closed contact has been broken as leak current fault, and auxiliary reclay J1 normally opened contact disconnection, normally-closed contact closure are without leak current fault.
Whether the action that test circuit is used to detect the explosion-proof controlling switch is normal, and simulates and to form a leakage current,
Sample circuit work is driven, test circuit includes the local test unit and remote-site testing unit being in parallel, as shown in fig. 6, surveying
Examination circuit specifically includes local test button ST, remote-site testing button ST ' and resistance R0.Local test button ST normally opened contacts with
One end after remote-site testing button ST ' normally opened contact parallel connections connects with the phase firewire through ZCT LH primary side major loops
Connect, C phase lines are connected in the present embodiment, the other end is connected with resistance R0 one end, and the resistance R0 other end is with being not passed through zero sequence
The N phase lines connection of transformer LH primary sides.By connecting local test button ST or remote-site testing button ST ', in zero-sequence mutual inductance
Device LH primary sides simulate to form a leakage current, so as to drive subsequent detection circuit to work；User by press local test by
Whether the action of button ST or the remote-site testing button ST ' detections explosion-proof controlling switch is normal, if pressing local test button
Auxiliary reclay J1 actions, main circuit power-off, it is normal after ST or remote-site testing button ST '.In specific implementation, if not
Remote-site testing function is needed, then the open circuit of remote-site testing button ST ' places, without wiring.
The operation principle of local-strange land double reset that the present embodiment provides-explosion-proof controlling switch of test self-insurance electric leakage is such as
Under.
In normal power supply, zero sequence current mutual inductor LH primary two-phase or three-phase balance are former according to electromagnetic induction
Reason, resultant flux is zero on the iron circuit of closure, and secondary produces without induced voltage, and comparator U3 output ends are low electricity
Position, triode T are not turned on, and auxiliary reclay J1 coils must not be electric, and electric leakage indicator lamp D9 does not work, and J1 normally-closed contact closes, often
Open contact disconnection, A.C. contactor JC coils obtain electric, and JC normally opened contacts closure, major loop output end has electricity.
When people touches the powered position of electrical equipment accidentally, or electrical equipment itself insulation decline causes to leak electricity, and can all make primary coil
Inflow and outflow electric current are no longer equal, and resultant flux is not zero.At this moment the secondary of zero sequence current mutual inductor LH produces induced voltage.
K guiding is switched by gear selecting, makes to carry out rectification, amplification, the place of filter circuit in the voltage signal entering signal process circuit
After reason, terminal 16,17 is entered by operational amplifier U5 all the way, the size for being connected to progress leakage current on display instrument V is shown,
Another way carries out judgement processing into voltage comparator U3, and when detectable voltage signals are less than setting voltage, (i.e. voltage-stablizer U4 is formed
Negative pole standard of comparison) when, comparator U3 outputs be low potential, and triode T is not turned on, and auxiliary reclay J1 coils must not be electric,
Electric leakage indicator lamp D9 does not work, and J1 normally-closed contact closure, normally opened contact disconnect, and A.C. contactor JC coils obtain electric, and JC is normally opened to be touched
Point closure, major loop output end have electricity.When detectable voltage signals are more than setting voltage, comparator U3 outputs are high potential, this
When triode T saturation conductions, auxiliary reclay J1 coils obtain electric, and electric leakage indicator lamp D9 starts to light, J1 normally-closed contact disconnects,
Normally opened contact closes, A.C. contactor JC coil losing electricities, and JC normally opened contacts disconnect, the power-off of major loop output end.Simultaneously among after
The self-locking immediately of electrical equipment J1 normally opened contacts, auxiliary reclay is set to be kept as electricity condition, electric leakage indicator lamp D9 is persistently lighted, major loop electricity
The lasting power-off of source output, so ensures that electrical equipment and the safety of the person.After potential safety hazard releases, by by local multiple
Position button SF or strange land SR SF ' can make auxiliary reclay coil losing electricity, so that JI normally-closed contacts turn on, exchange
Contactor JC coils recover electric, then realize that major loop has electricity output again.
Local-strange land double reset that the present embodiment provides-explosion-proof controlling switch of test self-insurance electric leakage is equally applicable single-phase
The protection of AC220V circuits.
Local-strange land double reset that the present embodiment provides-explosion-proof controlling switch of test self-insurance electric leakage is a kind of monitoring electricity
The device of gas line electrical leakage situation and disengagement failure line powering, it may be mounted at any non-explosion-proof, explosion-proof of all trades and professions
In single-phase or three-phase electric wiring, personal safety protection and the prevention of electrical fire are carried out, remote-site testing can be realized with resetting
And leakage current is shown, and corresponding space signal output can be provided, on the one hand the output of space signal passes through 18/19/20
Terminal provides the ON/OFF variable standby output signal that leak current fault whether there is, on the other hand by increasing in 16,17 terminals or outside it
Different transmitters are added to provide the analog quantity space signal of leak current fault size, in favor of the use of working in coordination of outside line.
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
The present invention is described in detail with reference to the foregoing embodiments, it will be understood by those within the art that：It still may be used
To be modified to the technical scheme described in previous embodiment, either which part or all technical characteristic are equal
Replace；And these modifications or replacement, the essence of appropriate technical solution is departed from the model that the claims in the present invention are limited
Enclose.
Claims (10)
- The explosion-proof controlling switch 1. a kind of local-strange land double reset-test self-insurance is leaked electricity, it is characterised in that：Including power supply processing Circuit, sample circuit, test circuit, signal processing circuit, signal judging circuit, driving and malfunction coefficient and reset circuit, leakage Current data output circuit and malfunction output circuit；The input connection major loop AC power of power supply processing circuit, output ± DC12V power supplys, output end connect other needs The power input of each circuit of dc source, there is provided dc source；Sample circuit is used to the signal voltage of different sensitivity being adjusted to same magnitude of voltage, output AC voltage detection signal, Including sampling circuit of electric leakage and sensitivity gear selection circuit, sampling circuit of electric leakage is by a zero sequence current mutual inductor and leads back Road connection carries out electric leakage sampling, the output end connection sensitivity gear selection circuit of sampling circuit of electric leakage, is selected according to actual conditions Select sensitivity gear, the signal input part of the output end connection signal processing circuit of sensitivity gear selection circuit；Whether the action that test circuit is used to detect the explosion-proof controlling switch is normal, and simulates and to form a leakage current, drives Sample circuit works, and test circuit includes the local test unit and remote-site testing unit that are in parallel, one end of test circuit with The phase firewire connection that major loop AC power is penetrated after zero sequence current mutual inductor, the other end do not penetrate with major loop AC power The zero line connection of zero sequence current mutual inductor；Signal processing circuit is used to carry out rectification, amplification and filtering process to the alternating voltage detection signal of sample circuit output, Export d. c. voltage signal, including signal transacting protection circuit, full-wave rectifying circuit, voltage amplifier circuit and the L being sequentially connected Type low pass filter, the input and leakage data output circuit of the output end connection signal judging circuit of signal processing circuit Input；Signal judging circuit is used to realize the multilevel iudge to detection leakage current and standard value, its output end connection driving and failure Display and the input of reset circuit；Leakage data output circuit is used for the size of the specific leakage current of quantitative display；Driving and malfunction coefficient include major loop drive part, malfunction coefficient part and reset portion, major loop with reset circuit Drive part is used for the control for driving A.C. contactor to carry out main circuit power break-make by auxiliary reclay, malfunction coefficient part For carrying out troubleshooting and display according to the output of signal judging circuit, reset portion is used for after troubleshooting to the circuit Resetted, reenter detection state, in-between relay contact output end connecting fault state output circuit；Wherein reset Part includes local reset unit and strange land reset unit；Malfunction output circuit is used to export leak current fault status signal.
- The explosion-proof controlling switch 2. local according to claim 1-strange land double reset-test self-insurance is leaked electricity, its feature exist In：The power supply processing circuit specifically include transformer B1, rectification circuit U0, protection diode D5, D6, light emitting diode D7, D8, electric capacity C1-C6, resistance R1, R2 and three terminal regulator U1, U2；Rectification circuit U0 is the rectifier bridge that diode D1-D4 is formed； The AC power of major loop is changed into AC30V by transformer B1, two input connection major loop AC power live wire L and Zero line N, two output end connection rectification circuit U0 two inputs；Rectification circuit U0 two output ends connect electric capacity respectively The input of the input of C1 and C3 parallel filtering circuit and electric capacity C2 and C4 parallel filtering circuit；Two-way filter circuit Input is also connected with three terminal regulator U1 and U2 input respectively, and three terminal regulator U1 and U2 output end are as power supply processing The output end of circuit, output ± DC12V power supplys；Protection diode D5, D6 is connected in parallel on three terminal regulator U1 input and output respectively Between between three terminal regulator U2 input and output；Electric capacity C5, C6 are connected in parallel on three terminal regulator U1 and three terminal regulator respectively Between U2 output end and ground, light emitting diode D7 is connected in parallel on electric capacity C5 both ends after being connected with resistance R1, light emitting diode D8 with Electric capacity C6 both ends, light emitting diode D7, D8 conduct ± DC12V power supply indicators are connected in parallel on after resistance R2 series connection.
- The explosion-proof controlling switch 3. local according to claim 1-strange land double reset-test self-insurance is leaked electricity, its feature exist In：The sample circuit specifically includes zero sequence current mutual inductor LH, potentiometer VR2-VR4, gear selecting switch K, resistance R18；Gear selecting It is a throw switch of hilted broadsword four to switch K, for sensitivity selection of leaking electricity, including three different sensitivities switch selection contacts, no Detection sensitivity contact and total terminals, detection sensitivity are adjustable in the range of 30mA-5000mA；The triple line and N of major loop Phase line is also cross zero sequence current mutual inductor LH primary winding, and the positive and negative both ends of zero sequence current mutual inductor LH secondary coil are simultaneously It is associated in resistance R18 both ends, the negativing ending grounding of zero sequence current mutual inductor LH secondary coil；Potentiometer VR2-VR4 is solid by it Fixed end is connected in parallel on resistance R18 both ends, and potentiometer VR2-VR4 movable end connects gear selecting switch K three different spirits respectively Sensitivity switch selection contact, gear selecting switch K not detection sensitivity contact ground；Gear selecting switch K total terminals are as sampling The output end output AC voltage detection signal of circuit, and be connected with the signal input part of signal processing circuit.
- The explosion-proof controlling switch 4. local according to claim 3-strange land double reset-test self-insurance is leaked electricity, its feature exist In：The test circuit specifically includes local test button ST, remote-site testing button ST ' and resistance R0；Local test button ST One end after normally opened contact is in parallel with remote-site testing button ST ' normally opened contacts and the master through zero sequence current mutual inductor LH primary sides The one phase firewire connection in loop, the other end are connected with resistance R0 one end, and the resistance R0 other end is with being not passed through zero-sequence current The zero line connection of transformer LH primary sides.
- The explosion-proof controlling switch 5. local according to claim 1-strange land double reset-test self-insurance is leaked electricity, its feature exist In：Signal transacting protection circuit in the signal processing circuit includes the protection diode D13 and D14 of two reverse parallel connections, One end of the parallel-connection structure is the signal input part of signal processing circuit, and the other end is grounded；Full-wave rectifying circuit is put including computing Big device U7, U8, resistance R11-R17 and diode D11-D12；Voltage amplifier circuit includes operational amplifier U6, resistance R8-R10 With rheostat VR1, rheostat VR1 is zero potentiometer；L-type low pass filter includes the resistance R7 and electric capacity C7 being in series, electricity The tie point for hindering R7 and electric capacity C7 is the output end of signal processing circuit, exports d. c. voltage signal.
- The explosion-proof controlling switch 6. local according to claim 1-strange land double reset-test self-insurance is leaked electricity, its feature exist In：The signal judging circuit specifically includes voltage-stablizer U4, resistance R6 and voltage comparator U3, and voltage comparator U3 positive pole is defeated Enter input of the end for signal judging circuit, voltage comparator U3 output end is the output end of signal judging circuit；Voltage-stablizer U4 negativing ending grounding, voltage-stablizer U4 anode and resistance R6 one end are both connected to voltage comparator U3 negative input, electricity R6 other end connection voltage comparator U3 positive source is hindered, voltage comparator U3 power supply positive and negative electrode connects power supply respectively ± DC12V the power supplys of process circuit output.
- The explosion-proof controlling switch 7. local according to claim 1-strange land double reset-test self-insurance is leaked electricity, its feature exist In：The leakage data output circuit specifically includes operational amplifier U5 and external display instrument V；Operational amplifier U5 is just Pole input is the input of leakage data output circuit, and operational amplifier U5 negative input is directly and operational amplifier U5 output end connection, operational amplifier U5 output end connection display instrument V one end, display instrument V other end ground connection.
- The explosion-proof controlling switch 8. local according to claim 7-strange land double reset-test self-insurance is leaked electricity, its feature exist In：The both ends of the display instrument V are also parallel with mV/4-20mA signal transmitting devices, and the transmitter is carried out using AC220V voltages Power supply, for realizing that the data of remote 4-20mV signals transmit.
- The explosion-proof controlling switch 9. local according to claim 7-strange land double reset-test self-insurance is leaked electricity, its feature exist In：The display instrument V is provided with RS485 output interfaces, and is furnished with corresponding communication protocol, for realizing remote Various types of data RS485 communication modes data remote.
- The explosion-proof controlling switch 10. local according to claim 1-strange land double reset-test self-insurance is leaked electricity, its feature exist In：The driving and malfunction coefficient specifically include resistance R0, R3-R5, triode T, light emitting diode D9, protection with reset circuit Diode D10, auxiliary reclay J1, A.C. contactor JC, fuse FU, local reset button SF and strange land SR SF '； Light emitting diode D9 and resistance R3 series arm, protection diode D10, auxiliary reclay J1 coil with resistance R4 phases simultaneously Connection, the first end connection+DC12V power supplys of the parallel-connection structure, the second end of the parallel-connection structure is driving and malfunction coefficient and reset The input of circuit, and be connected simultaneously with resistance R5 first end and triode T colelctor electrode；Light emitting diode D9 is positive even Connect, protection diode D10 Opposite direction connections；Resistance R5 the second end while connecting triode T base stage and strange land SR SF ' First end, triode T grounded emitter；Resistance R0 first end connection+DC12V power supplys, resistance R0 the second end connection Auxiliary reclay J1 normally opened contact first end, the auxiliary reclay J1 end of normally opened contact second connection local reset button SF are normal Open the first end of contact, the second end connection strange land SR SF ' normally opened contacts second of local reset button SF normally opened contacts End；Main A.C. contactor JC coil is connected to after being connected with auxiliary reclay J1 a normally-closed contact, fuse FU On AC380V or AC220V power supplys, realize the break-make of control loop, A.C. contactor JC main contacts be connected on AC380V or In the major loop of AC220V power supplys, the break-make of main circuit power is realized；Malfunction output circuit includes auxiliary reclay J1 a pair normally opened, normally-closed contacts with common port, as electric leakage event Hinder output signal, for leak current fault teletransmission on-off model output end；Auxiliary reclay J1 normally opened contact closes, is normally closed tactile Point has been broken as leak current fault, and auxiliary reclay J1 normally opened contact disconnection, normally-closed contact closure are without leak current fault.
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| CN201710935081.8A CN107453322B (en) | 2017-10-10 | 2017-10-10 | Local-remote dual reset-test self-protection electric leakage explosion-proof control switch |
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| CN201710935081.8A CN107453322B (en) | 2017-10-10 | 2017-10-10 | Local-remote dual reset-test self-protection electric leakage explosion-proof control switch |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108490352A (en) * | 2018-03-15 | 2018-09-04 | 广州飞机维修工程有限公司 | A kind of Boeing-737 NG aircrafts wiper motor automatic fault diagnosis device |
| CN114236284A (en) * | 2021-12-14 | 2022-03-25 | 北京机电工程研究所 | Electrical testing device for aircraft |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2053389U (en) * | 1989-06-02 | 1990-02-21 | 郑秉阳 | Current-type electric leakage protector for multi-circuit high voltage |
| CN2393127Y (en) * | 1999-01-12 | 2000-08-23 | 长沙日新自动化成套厂 | Multifunctional servo driver |
| CN201629556U (en) * | 2010-01-09 | 2010-11-10 | 浙江中凯科技股份有限公司 | Multifunctional leakage detecting alarm device |
| CN202134888U (en) * | 2011-04-09 | 2012-02-01 | 温州大学 | Time switch and earth leakage protection apparatus specially for water heater |
| CN102496909A (en) * | 2011-11-24 | 2012-06-13 | 天津市百利电气有限公司 | Simple leakage protector with multi-gear adjustable protection values and action time |
| JP2014100035A (en) * | 2012-11-16 | 2014-05-29 | Cosel Co Ltd | Flyback type switching power supply |
| CN205051332U (en) * | 2015-10-30 | 2016-02-24 | 三垦电气株式会社 | Earth leakage detection device |
| CN105406441A (en) * | 2015-12-15 | 2016-03-16 | 陈泽 | Power ground fault protection circuit |
| CN205489453U (en) * | 2016-01-04 | 2016-08-17 | 广州金田瑞麟净化设备制造有限公司 | Leakage protective circuit |
-
2017
- 2017-10-10 CN CN201710935081.8A patent/CN107453322B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2053389U (en) * | 1989-06-02 | 1990-02-21 | 郑秉阳 | Current-type electric leakage protector for multi-circuit high voltage |
| CN2393127Y (en) * | 1999-01-12 | 2000-08-23 | 长沙日新自动化成套厂 | Multifunctional servo driver |
| CN201629556U (en) * | 2010-01-09 | 2010-11-10 | 浙江中凯科技股份有限公司 | Multifunctional leakage detecting alarm device |
| CN202134888U (en) * | 2011-04-09 | 2012-02-01 | 温州大学 | Time switch and earth leakage protection apparatus specially for water heater |
| CN102496909A (en) * | 2011-11-24 | 2012-06-13 | 天津市百利电气有限公司 | Simple leakage protector with multi-gear adjustable protection values and action time |
| JP2014100035A (en) * | 2012-11-16 | 2014-05-29 | Cosel Co Ltd | Flyback type switching power supply |
| CN205051332U (en) * | 2015-10-30 | 2016-02-24 | 三垦电气株式会社 | Earth leakage detection device |
| CN105406441A (en) * | 2015-12-15 | 2016-03-16 | 陈泽 | Power ground fault protection circuit |
| CN205489453U (en) * | 2016-01-04 | 2016-08-17 | 广州金田瑞麟净化设备制造有限公司 | Leakage protective circuit |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108490352A (en) * | 2018-03-15 | 2018-09-04 | 广州飞机维修工程有限公司 | A kind of Boeing-737 NG aircrafts wiper motor automatic fault diagnosis device |
| CN108490352B (en) * | 2018-03-15 | 2024-01-09 | 广州飞机维修工程有限公司 | Automatic diagnosis device for faults of wave tone 737NG aircraft wiper motor |
| CN114236284A (en) * | 2021-12-14 | 2022-03-25 | 北京机电工程研究所 | Electrical testing device for aircraft |
| CN114236284B (en) * | 2021-12-14 | 2023-09-08 | 北京机电工程研究所 | Electrical testing device for aircraft |
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