CN207010221U - A kind of intelligent wireless controller switching equipment of fault detect - Google Patents
A kind of intelligent wireless controller switching equipment of fault detect Download PDFInfo
- Publication number
- CN207010221U CN207010221U CN201720914309.0U CN201720914309U CN207010221U CN 207010221 U CN207010221 U CN 207010221U CN 201720914309 U CN201720914309 U CN 201720914309U CN 207010221 U CN207010221 U CN 207010221U
- Authority
- CN
- China
- Prior art keywords
- circuit
- resistance
- current
- electrically connects
- operational amplifier
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The utility model discloses a kind of intelligent wireless controller switching equipment of fault detect, including：Information master control circuit, and lightning protection circuit, main line current detection circuit, main line voltage detection circuit, short-circuit protection circuit, electric-leakage detection circuit, the control relay circuit being connected electrically；Lightning protection circuit is connected in parallel on the end of incoming cables of intelligent power distribution equipment power supply line; main line current detection circuit, main line voltage detection circuit and electric-leakage detection circuit are provided with its AC power; main line current signal, main line voltage signal and leakage current signal that related circuit detects are sent to information master control circuit; when an exception occurs; information master control circuit sends corresponding order and is stopped to control relay circuit, block system relay；Short-circuit signal in the main line current signal detected is converted into control signal by short-circuit protection circuit, sends control signals to control relay circuit；When short trouble occurs, block system relay is stopped.
Description
Technical field
It the utility model is related to controller switching equipment, the intelligent wireless controller switching equipment of more particularly to a kind of fault detect.
Background technology
With the development of the social economy, the quantity of controller switching equipment is on the increase, its geographical position is more and more scattered, its quantity
It is numerous, running environment is complicated, this to periodically make an inspection tour brings certain difficulty.The most portion of potential safety hazard in power network be present
Divide and be：As residential block transformer station quantity is continuously increased, it is increasingly heavier periodically to make an inspection tour burden；Some controller switching equipment station operations
Bad environments, under extreme meteorological condition, it is unfavorable that power supply reliability and electrical equipment are run in itself；The high temperature of summer, humidity
Primary equipment insulation, control device operation and metering device precision can be influenceed；In order to ensure the normal operation of electrical equipment, prevention
Electric power accident to a monitoring of registering one's residence concerning important, it is main to include the state such as short circuit, electric leakage, over-pressed, under-voltage.
Traditional controller switching equipment is only easy for user management electricity consumption and maintenance, belongs to the distribution electric energy of single mass, each point
Route air-break shields to circuit folding control and overload, short circuit, electric leakage, it is necessary to and it is manually operated face-to-face, and
It is relative in terms of safety precautions, electrical fire strick precaution to lack.
The operating catastrophic failure of distribution line should generally be handled line outage, power off time length, consumption
Take substantial amounts of manpower and materials, have a strong impact on power supply reliability.
Problem present on being based on, this application provides the technical scheme for solving technical problem.
The content of the invention
The purpose of this utility model is to provide a kind of intelligent wireless controller switching equipment of fault detect, realizes to electrical equipment
Specification, the emergency situations of intelligent control electric line, make its power supply unit more safe and reliable operation.
The technical scheme that the utility model is provided is as follows：
A kind of intelligent wireless controller switching equipment of fault detect, including：Information master control circuit, and it is electric with described information master control
The lightning protection circuit of road electrical connection, main line current detection circuit, main line voltage detection circuit, short-circuit protection circuit, electric leakage inspection
Slowdown monitoring circuit, control relay circuit；The lightning protection circuit is connected in parallel on the inlet wire of the intelligent power distribution equipment power supply line
End, the main line current detection circuit, main line voltage detection are provided with the AC power of the intelligent power distribution equipment
Circuit and electric-leakage detection circuit, the main line current signal that related circuit is detected, main line voltage signal and leakage current
Signal is sent to information master control circuit, and when an exception occurs, described information master control circuit sends and ordered accordingly to the relay
Device control circuit, block system relay are stopped；The short-circuit protection circuit also electrically connects with the main line current detection circuit,
Short-circuit signal in the main line current signal detected is converted into control signal by the short-circuit protection circuit, by the control
Signal processed is sent to the control relay circuit；When short trouble occurs, block system relay is stopped.
Preferably, the lightning protection circuit includes：3 insurance devices RF1, RF2, RF3；The insurance device will fuse
Device and piezo-resistance encapsulation one, wherein first end are fuse end, and the second end is that fuse end and piezo-resistance are commonly connected
End, the 3rd end is piezo-resistance end；Surge Protector G1, photoelectrical coupler U1；The zero line AC-L of power supply respectively with institute
State insurance device RF1 first end and the first end electrical connection of the insurance device RF3；The second end of the insurance device RF1
Electrically connected with first end of second end for insuring device RF3 jointly with current-limiting resistance R1, the second of the current-limiting resistance R1
End electrically connects with diode D1 anode tap and light emitting diode D2 cathode terminal respectively, the cathode terminal of the diode D1 and institute
State the electrical connection of photoelectrical coupler U1 anode taps；The photoelectrical coupler U1 cathode terminals respectively the anode tap with light emitting diode D2,
The second end of the insurance device RF2 and the 3rd end electrical connection of the insurance device RF3；The colelctor electrode of the photoelectrical coupler
With emitter stage electrical connection corresponding with described information master control circuit；The insurance device RF1 and the insurance device RF2 the 3rd end
The first end with Surge Protector G1 electrically connects jointly, and the second end of the Surge Protector G1 electrically connects with ground PE；Power supply electricity
The zero line side AC-N in source electrically connects with the first end of the insurance device RF2.
Preferably, the main line current detection circuit includes：Current Transmit 1；The positive pole of the Current Transmit 1
End CTL1 electrically connected respectively with resistance R18 first end and resistance R14 first end, the second end of the resistance R18 with it is public
Ground terminal GDNA is electrically connected, and the second end of the resistance R14 electrically connects with described information master control circuit；The Current Transmit 1
Negative pole end CTL2 electrically connected respectively with resistance R20 first end and resistance R24 first end, the second end of the resistance R20
Electrically connected with the common GDNA, the second end of the resistance R24 electrically connects with described information master control circuit.
Preferably, the main line voltage detection circuit includes：BAV99 clamp diodes D8；Communication power supply passes through altogether
Mould inductance LMC2 is filtered, filtered zero line AC-L by after divider resistance R30, R31, R32 respectively with divider resistance
R34 first end and clamp diode D8 the first signal end electrical connection；The first signal end of the clamp diode D8 is also logical
Resistance R33 is crossed to electrically connect with information master control circuit；Filtered zero line side AC-N the second ends with the divider resistance R34 respectively
Electrically connected with the secondary signal end of the clamp diode D8；The secondary signal end of the clamp diode D8 also with information master control
Circuit electrically connects, and the 3rd control terminal of the clamp diode D8 electrically connects with the first power end.
Preferably, the electric-leakage detection circuit includes：Current transformer ZCT1, operational amplifier U7, reference voltage source U8；
The cathode output end of the current transformer ZCT1 is electrically connected by current-limiting resistance R19 with resistance R21 first end；The resistance
R21 first end is also electrically connected by current-limiting resistance R22 with operational amplifier U7 the first inverting input；The operation amplifier
Device U7 the first inverting input is also electrically connected by current-limiting resistance R15 with the first output end of the operational amplifier U7, shape
Into negative feedback network；The second end electricity that current transformer ZCT1 cathode output end passes through the current-limiting resistance R28 and resistance R21
Connection；The second end of the resistance R21 also passes through the current-limiting resistance R25 and operational amplifier U7 the first normal phase input end electricity
Connection；The first normal phase input end of the operational amplifier U7 also by current-limiting resistance R27 respectively with the operational amplifier U7
The second inverting input and the operational amplifier U7 the electrical connection of the second output end, the voltage of the reference voltage source U8 is defeated
Go out reference edge to electrically connect with the second normal phase input end of the operational amplifier U7 by divider resistance R35, the operation amplifier
Device U7 the second normal phase input end also electrically connects with divider resistance R37 first ends, the ends of divider resistance R37 second with publicly
End electrical connection；The first output end of the operational amplifier U7 is electrically connected by current-limiting resistance R23 with analog to digital conversion circuit.
Preferably, in addition to analog-digital conversion circuit as described：Modulus conversion chip U6；Modulus conversion chip U6 respectively with it is described
Electric-leakage detection circuit and the electrical connection of information master control circuit.Preferably, the short-circuit protection circuit includes：Two-way operational amplifier
U9, two-way differential comparator U10；The positive terminal CTL1 of the Current Transmit 1 is transported by current-limiting resistance R39 and the two-way
Calculate amplifier U9 the first reverse input end electrical connection；The positive terminal CTL1 of the Current Transmit 1 also passes through current-limiting resistance
R56 electrically connects with the second positive input of the two-way operational amplifier U9；The negative pole end CTL2 of Current Transmit 1 leads to
The first positive input that current-limiting resistance R44 is crossed with the two-way operational amplifier U9 electrically connects；The Current Transmit 1 is negative
Extreme CTL2 is also electrically connected by current-limiting resistance R58 with the second reverse input end of the two-way operational amplifier U9；It is described double
Road operational amplifier U9 the first output end reversely inputs by the first of the current-limiting resistance R40 and two-way operational amplifier U9
End electrical connection, forms feedback network；The second output end of the two-way operational amplifier U9 passes through current-limiting resistance R59 and described couple
Road operational amplifier U9 the second reverse input end electrical connection, forms feedback network；The first of the two-way operational amplifier U9
The public connecting end of output end and the second output end passes through current-limiting resistance R49, divider resistance R50 and the two-way differential comparator
U10 the first normal phase input end electrical connection；The first normal phase input end of the two-way differential comparator U10 also with divider resistance
R51 first end electrical connection, the second end of the divider resistance R51 electrically connects with the publicly GNDA；The two-way is differential
Comparator U10 the first reverse input end is electrically connected with divider resistance R45 first end and divider resistance R42 first end respectively
Connect, the second end of the divider resistance R45 electrically connects with the publicly GNDA, the second end of the divider resistance R42 and the
One power end electrically connects；The first output end of the two-way differential comparator U10 electrically connects with diode D15 anode tap, institute
The cathode terminal for stating diode D15 electrically connects with the second positive input of the two-way differential comparator U10；The two-way is differential
Cathode terminal of comparator U10 the second positive input also with diode D16 electrically connects, the anode tap of the diode D16 with
Described information master control circuit electrically connects；The second reverse input end of the two-way differential comparator U10 respectively with divider resistance R43
First end and divider resistance R41 first end electrical connection, the second end of the divider resistance R433 and the publicly GNDA
Electrical connection, the second end of the divider resistance R41 electrically connects with first power end；The two-way differential comparator U10's
Second output end STCH_OFF electrically connects with the control relay circuit.
Preferably, the control relay circuit includes：Two triodes Q1 and Q2, relay RY1 and RY2；Described three
Pole pipe Q1 collector terminal respectively with relay RY1 the first control terminal STCH_ON and the control terminals of relay RY2 first
STCH_ON is electrically connected, and the base terminal of the triode Q1 electrically connects with described information master control circuit；The current collection of the triode Q2
Extremely respectively with relay RY1 the second control terminal STCH_OFF1 and the second control terminals of relay RY2 STCH_OFF1
Electrical connection；The triode Q2 base terminals electrically connect with the short-circuit protection circuit.
Preferably, in addition to：The remote monitoring server electrically connected with described information master control circuit.
Compared with prior art, a kind of intelligent wireless controller switching equipment beneficial effect of fault detect of the present utility model exists
In：
1st, in the utility model, be provided with lightning protection circuit, when register one's residence civil power by be struck by lightning, surge when, lightning protection device
Circuit is to ground discharge, so as to protect rear end electrical equipment to set through Thermal Cutoffs, Zinc-oxide piezoresistor, ceramic gas generating pipe
It is standby.When duration impulse and sustained overvoltage, or because piezo-resistance aging, piezo-resistance heating, Thermal Cutoffs are overheated and disconnected,
The damage of lightning protection device is judged by feedback sense circuit, reminds user to change in time；Avoid electric equipment by lightning surge and
Cause to damage.
2nd, in the utility model, short-circuit protection circuit and residual current detection circuit are provided with, conference is crossed when load and leads
The electric current of cause is excessive, electrical equipment heating, and overload can also reduce line insulation level, or even burning apparatus or line to circuit for a long time
Road, by protection circuit to its monitoring and protecting, so as to be avoided that the damage of the generation of electrical fire accident and electric equipment.
3rd, in the utility model, the residual current detection circuit of setting is used to detect long-standing leakage current, especially
It is leakage current of the two-phase through excessive resistance eutral grounding, and substantial amounts of heat will be given out when by apparatus insulated breakage, is made absolutely
Edge further damages, or even makes combustible material ignition, has this protection circuit can be with active line drain conditions；Avoid people
Body electric shock accidents, is ensured personal safety.
4th, in the utility model, the start and stop state of the application equipment power on/off is controlled by information master control circuit, is reduced
The time of power failure, it is ensured that normal electricity consumption, and can be rapidly performed by reacting when there is accident, solve reply burst in time
Event；Realize integral intelligent controller switching equipment and carry out fast reaction, ensure to shorten power off time, the requirement to restore electricity rapidly.
Brief description of the drawings
Below by a manner of clearly understandable, preferred embodiment is described with reference to the drawings, to a kind of the wireless of fault detect
Above-mentioned characteristic, technical characteristic, advantage and its implementation of intelligent power distribution equipment are further described.
Fig. 1 is a kind of structure chart of intelligent wireless controller switching equipment one embodiment of fault detect of the utility model；
Fig. 2 is a kind of circuit diagram of another embodiment of the intelligent wireless controller switching equipment of fault detect of the utility model；
Fig. 3 is a kind of circuit diagram of another embodiment of the intelligent wireless controller switching equipment of fault detect of the utility model；
Fig. 4 is a kind of circuit diagram of another embodiment of the intelligent wireless controller switching equipment of fault detect of the utility model；
Fig. 5 is a kind of circuit diagram of another embodiment of the intelligent wireless controller switching equipment of fault detect of the utility model；
Fig. 6 is a kind of circuit diagram of another embodiment of the intelligent wireless controller switching equipment of fault detect of the utility model；
Fig. 7 is a kind of circuit diagram of another embodiment of the intelligent wireless controller switching equipment of fault detect of the utility model；
Fig. 8 is a kind of circuit diagram of another embodiment of the intelligent wireless controller switching equipment of fault detect of the utility model；
Fig. 9 is a kind of circuit diagram of another embodiment of the intelligent wireless controller switching equipment of fault detect of the utility model；
Figure 10 is a kind of circuit diagram of another embodiment of the intelligent wireless controller switching equipment of fault detect of the utility model.
Embodiment
In order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art, accompanying drawing will be compareed below
Illustrate specific embodiment of the present utility model.It should be evident that drawings in the following description are only of the present utility model one
A little embodiments, for those of ordinary skill in the art, on the premise of not paying creative work, can also be according to these
Accompanying drawing obtains other accompanying drawings, and obtains other embodiments.
To make simplified form, the part related to the utility model is only schematically show in each figure, they are not
Represent its practical structures as product.In addition, so that simplified form readily appreciates, there is identical structure or work(in some figures
The part of energy, only symbolically depicts one of those, or only marked one of those.Herein, "one" is not only
Represent " only this ", the situation of " more than one " can also be represented.
The utility model provides a kind of one embodiment of the intelligent wireless controller switching equipment of fault detect, with reference to the He of figure 1
Shown in Fig. 2；Intelligent power distribution equipment in this application includes：Information master control circuit 100, and with described information master control circuit
Lightning protection circuit 200, main line current detection circuit 300, main line voltage detection circuit 400, the short-circuit protection circuit of electrical connection
500th, electric-leakage detection circuit 600, control relay circuit 700；The lightning protection circuit 100 is connected in parallel on the intelligent power distribution and set
The end of incoming cables of available electricity power line, the main line current detection circuit is provided with the AC power of the intelligent power distribution equipment
300th, the main line voltage detection circuit 400 and electric-leakage detection circuit 600, the main line electric current that related circuit is detected are believed
Number, main line voltage signal and leakage current signal send to information master control circuit 100, when an exception occurs, described information is total
Control circuit is sent orders to the control relay circuit 700 accordingly, and block system relay is stopped；The short-circuit protection electricity
Road 500 is also electrically connected with the main line current detection circuit 300, and the short-circuit signal in the main line current signal detected is passed through
The short-circuit protection circuit 500 is converted into control signal, and the control signal is sent to the control relay circuit 700；
When short trouble occurs, block system relay is stopped.Include electric energy computation chip U8 in information master control circuit 100, its
Model ATT7037A；Chip is provided with the corresponding command pin for being used to receive and send, receives each circuit monitoring and arrives
Voltage and current information；When an exception occurs, command information is sent to control relay circuit 700 by pin 38OFF_CTT
In relay, then relay cut-out after, strengthen to the safe and effective monitoring of electrical fire, protect personal safety and avoid house
The damage of electrical appliance equipment.After contacting extremely, command information is sent to Control by the pin 37ON_CTTG on U8
Relay in circuit 700, this equipment is set to carry out normal working condition.
Another embodiment is also provided on the basis of more than, referring to figs. 2 and 3 shown；The lightning protection circuit includes：
3 insurance devices RF1, RF2, RF3；Fuse and piezo-resistance are encapsulated one by the insurance device, and wherein first end is molten
Disconnected device end, the second end is fuse end and piezo-resistance public connecting end, and the 3rd end is piezo-resistance end；Surge Protector G1,
Photoelectrical coupler U1；The zero line AC-L of the power supply first end with the insurance device RF1 and the insurance device respectively
RF3 first end electrical connection；The second end of the insurance device RF1 and the second end of the insurance device RF3 are jointly and current limliting
Resistance R1 first end electrical connection, the second end of current-limiting resistance R1 anode tap and light emitting diode with diode D1 respectively
D2 cathode terminal electrical connection, the cathode terminal of the diode D1 electrically connect with the photoelectrical coupler U1 anode taps；The photoelectricity
Coupler U1 the cathode terminals anode tap with light emitting diode D2, the second end of the insurance device RF2 and the protector respectively
Part RF3 the 3rd end electrical connection；The collector and emitter of the photoelectrical coupler is corresponding with described information master control circuit to be electrically connected
Connect；First end of the insurance device RF1 and the insurance device RF2 the 3rd end jointly with Surge Protector G1 electrically connects,
The second end of the Surge Protector G1 electrically connects with ground PE；The zero line side AC-N of power supply is with the insurance device RF2's
First end electrically connects.
Specifically, AC-L and AC-N are connected in parallel on the front end on the live wire and zero line of intelligent power distribution equipment inlet wire of registering one's residence, normally
The piezo-resistance high-impedance state in device, the Thermal Cutoffs flow direction that alternating current forward current passes through in AC-L, RF1 are insured during work
Current-limiting resistance R1, D1 (halfwave rectifier diode), U1 (photoelectrical coupler) isolation signals are connected to single-chip microcomputer through J1 sockets, single
Piece machine receives normal 50HZ pulse signal, and forward current flows back to by the Thermal Cutoffs in RF2, AC-N ports again；And hand over
Electric reverse current is flowed by AC-N terminals, the Thermal Cutoffs in RF 2, light emitting diode D2, current-limiting resistance R1 and RF1
Thermal Cutoffs flows back to from terminal AC-L again, provides electric current for light emitting diode D2, light emitting diode D2 is luminous as lightning protection device
The status indicator lamp of normal work.When alternating current of registering one's residence is struck by lightning or during voltage surge, AC-L and AC-N both end voltages are first to be worked as
Change, be in low resistance state when fluctuation voltage reaches the startup voltage of Zinc-oxide piezoresistor, voltage converges by RF1 and RF2
Gather G1 ceramic gas discharge tubes, when voltage reaches the breakdown voltage of discharge tube, cause discharge tube gap discharge, gas in pipe
Ionization, discharge tube conducting, then by ground wire PE, flow into the earth.Fluctuation voltage pair is avoided by the circuit design of the present embodiment
The influence of the equipment of rear end.When fluctuation voltage is acted in piezo-resistance, the high stream heating of piezo-resistance low-resistance can cause temperature to be protected
Dangerous silk crosses cause thermal damage, line broken circuit feedback circuit D2 and R1 no current, and indicator lamp extinguishes；Another bar branch road D1, U1 and R1 are also because of nothing
Electric current and normal pulse signal can not be provided for single-chip microcomputer, therefore SCM program also concludes that lightning protection device damages, send anti-
Thunder device distress condition reminds user's renewal.
Another embodiment is also provided on the basis of more than, with reference to shown in figure 2 and Fig. 4；The main line current detection circuit
Including：Current Transmit 1；The positive terminal CTL1 of the Current Transmit 1 first ends and resistance with resistance R18 respectively
R14 first end electrical connection, the second end of the resistance R18 electrically connect with common GDNA, the second end of the resistance R14
Electrically connected with described information master control circuit；The negative pole end CTL2 of the Current Transmit 1 respectively with resistance R20 first end and
Resistance R24 first end electrical connection, the second end of the resistance R20 electrically connect with the common GDNA, the resistance R24
The second end electrically connected with described information master control circuit.
Specifically, the main line current detection circuit in the present embodiment is used to detect the total current on the loop of live wire and zero line
State；Current acquisition electricity is accessed by CTL1, CTL2 come the electric current of collection site, current transformer by current transformer
Road.Current signal is converted into voltage signal by R18, R20, then connect by R14, C24 and R24, the C28 filter circuit formed
Enter the electric energy computation chip U8 in information master control circuit 100, data are subjected to data processing through electric energy computation chip U8.Metering core
Piece calculates current active power, reactive power, apparent energy, active energy, idle according to current voltage, the galvanometer of input
The electrical parameters such as electric energy.Computation chip is according to the data after acquisition process, by whether judging voltage, electric current in normal scope,
Calculate the information such as current power, electric energy.
Another embodiment is also provided on the basis of more than, referring to figs. 2 and 5 shown；The main line voltage detects circuit
Including：Clamp diode D8, the model BAV99 of its clamp diode；Main line voltage predominantly detects whether the voltage registered one's residence goes out
Existing over-pressed, under-voltage, real-time guard, avoids electric equipment input voltage problem and produces damage；Communication power supply passes through common mode
Inductance LMC2 is filtered, filtered zero line AC-L by after divider resistance R30, R31, R32 respectively with divider resistance R34
First end and clamp diode D8 the first signal end electrical connection；The first signal end of the clamp diode D8 also passes through electricity
Resistance R33 electrically connects with information master control circuit；Filtered zero line side AC-N the second end with the divider resistance R34 and institute respectively
State clamp diode D8 secondary signal end electrical connection；The secondary signal end of the clamp diode D8 also with information master control circuit
Electrical connection, the 3rd control terminal of the clamp diode D8 electrically connect with the first power end.With reference to shown in figure 5, the 3rd control terminal
It is connected with 3.3V voltages；AC_L registers one's residence 220V alternating current fire wires, and AC_N registers one's residence 220V alternating current zero lines, and voltage passes through
The decompression of R30, R31, R32 and R34 bleeder circuit corresponding proportion, the alternating voltage for obtaining small-signal clamp by D8 bilateral diodes
It is defeated behind position (protection chip input pin, prevent Conduction Interference on line), then the filtering of the filter circuit by being made up of R33 and C33
Enter computation chip, voltage value corresponding to computation chip collection signal conversion, can judge whether voltage is over-pressed or deficient by numerical value
Pressure.(electric resistance partial pressure, diode clamp, RC filtering) by electric resistance partial pressure mode collection voltages, judge whether it is over-pressed or under-voltage,
When voltage is more than the threshold values set or less than under-voltage threshold values, intelligent switch delay separating brake, status indicator lamp circulation flicker；Wait
Intelligent switch is attempted to close a floodgate after 30S, if state does not eliminate, then separating brake；The normal power supply if state eliminates.
Another embodiment is also provided on the basis of more than, with reference to shown in figure 2, Fig. 6 and Fig. 7；The electric-leakage detection circuit
Including：Current transformer ZCT1, operational amplifier U7, reference voltage source U8；The cathode output end of the current transformer ZCT1
Electrically connected by current-limiting resistance R19 with resistance R21 first end；The first end of the resistance R21 also by current-limiting resistance R22 with
Operational amplifier U7 the first inverting input electrical connection；The first inverting input of the operational amplifier U7 also passes through current limliting
Resistance R15 electrically connects with the first output end of the operational amplifier U7, forms negative feedback network；Current transformer ZCT1's is negative
Pole output end is electrically connected by current-limiting resistance R28 with the second end of the resistance R21；The second end of the resistance R21 also passes through
Current-limiting resistance R25 electrically connects with the first normal phase input end of the operational amplifier U7；The first of the operational amplifier U7 is just
Phase input also passes through current-limiting resistance R27 the second inverting input with the operational amplifier U7 and the operation amplifier respectively
Device U7 the second output end electrical connection, the voltage output reference edge of the reference voltage source U8 by divider resistance R35 with it is described
Operational amplifier U7 the second normal phase input end electrical connection, the second normal phase input end of the operational amplifier U7 are also electric with partial pressure
The electrical connection of R37 first ends is hindered, the ends of divider resistance R37 second electrically connect with common；The of the operational amplifier U7
One output end is electrically connected by current-limiting resistance R23 with analog to digital conversion circuit.Also include analog-digital conversion circuit as described：Analog-to-digital conversion core
Piece U6；Modulus conversion chip U6 electrically connects with the electric-leakage detection circuit and information master control circuit respectively.Electric-leakage detection circuit
That is residual current Acquisition Circuit, residual current sensor ZCT1 access circuit residual current Acquisition Circuit, warp by 1 and 2 pins
Cross resistance R21 and current signal is switched into voltage signal, U8 reference voltages chip filters by C35, C34, R35, R37 resistance point
Pressure, bias voltage is provided for the residual voltage signal after conversion in the voltage follower formed by SGM3552, then by integrated
After operational amplifier SGM8552 amplifications, input AD conversion chip U6 is converted into data signal, with reference to shown in figure 7, then passes through IIC
Transmission is given to computation chip, and computation chip calculates by interiors of products program, draws residual current value.When the residual current of collection
When value is more than 30mA or other setting values, product sends alarm.In the figure 7, cable arrangement temperature sensor can be examined preferably
Survey because overload, short circuit, electric arc etc. bring the too high situation of line temperature, double check, double shield are provided for user power utilization.Have
Occur in many cases such as the phenomenon that does not trip of short circuit, be because cable mismatched with rated current or cable aging cause it is short
The temperature of cable rises during road, and cable, which has melted to be spaced apart, also not to trip, and this shape can effectively be avoided by increasing temperature detection on line
Condition, double shield is provided safely for user power utilization.
Another embodiment is also provided on the basis of more than, with reference to shown in figure 2 and Fig. 8；The short-circuit protection circuit includes：
LM158 two-way operational amplifier U9, LM2903 two-way differential comparators U10；The positive terminal CTL1 of the Current Transmit 1 leads to
The first reverse input end that current-limiting resistance R39 is crossed with the two-way operational amplifier U9 electrically connects；The Current Transmit 1
Positive terminal CTL1 is also electrically connected by current-limiting resistance R56 with the second positive input of the two-way operational amplifier U9；It is described
The first positive input that the negative pole end CTL2 of Current Transmit 1 passes through the current-limiting resistance R44 and two-way operational amplifier U9
Electrical connection；The negative pole end CTL2 of Current Transmit 1 also passes through the of current-limiting resistance R58 and the two-way operational amplifier U9
Two reverse input ends electrically connect；The first output end of the two-way operational amplifier U9 passes through current-limiting resistance R40 and the two-way
Operational amplifier U9 the first reverse input end electrical connection, forms feedback network；The second of the two-way operational amplifier U9 is defeated
Go out end to electrically connect with the second reverse input end of the two-way operational amplifier U9 by current-limiting resistance R59, form feedback network；
The first output end of the two-way operational amplifier U9 and the public connecting end of the second output end pass through current-limiting resistance R49, partial pressure
Resistance R50 electrically connects with the first normal phase input end of the two-way differential comparator U10；The two-way differential comparator U10's
First end of first normal phase input end also with divider resistance R51 electrically connects, the second end of the divider resistance R51 with it is described public
Ground GNDA is electrically connected；The first reverse input end of the two-way differential comparator U10 respectively with divider resistance R45 first end and
Divider resistance R42 first end electrical connection, the second end of the divider resistance R45 electrically connects with the publicly GNDA, described
Divider resistance R42 the second end electrically connects with the first power end；The first output end of the two-way differential comparator U10 and two poles
Pipe D15 anode tap electrical connection, the second forward direction of the cathode terminal of the diode D15 and the two-way differential comparator U10 are defeated
Enter end electrical connection；Cathode terminal of the second positive input of the two-way differential comparator U10 also with diode D16 electrically connects,
The anode tap of the diode D16 electrically connects with described information master control circuit；The second of the two-way differential comparator U10 is reverse
Input electrically connects with divider resistance R43 first end and divider resistance R41 first end respectively, the divider resistance R433's
Second end electrically connects with the publicly GNDA, and the second end of the divider resistance R41 electrically connects with first power end；Institute
The the second output end STCH_OFF for stating two-way differential comparator U10 electrically connects with the control relay circuit.Short-circuit hardware package
Protection circuit CTL1 and CTL2 access current transformer both ends, before gather the existing current signal current transformer of electric current and change
Into voltage signal, here again by R39, R40, R44, R48, R53, R56, R58, R59, U10A and U10B composition U10 namely fortune
Put, D14, D17 are amplified to signal and full-wave rectification, then RC filter circuits are formed by R49, C41 and R50, C42 it are filtered
Ripple, then (value exported during fiducial value when short circuit at calculating) is compared to the signal of processing by U10 comparators, it is then defeated
Enter to driving relay switch control terminal.When short-circuit on circuit, software does not act, more than hardware short-circuit voltage threshold values when,
U10 exports high level, driving relay switch action.
Another embodiment is also provided on the basis of more than, referring to figs. 2 and 9 shown；The control relay circuit bag
Include：Two triodes Q1 and Q2, relay RY1 and RY2；The collector terminal of the triode Q1 respectively with the relay RY1
First control terminal STCH_ON and the first control terminals of relay RY2 STCH_ON electrical connections, the base terminal of the triode Q1
Electrically connected with described information master control circuit；The collector terminal of the triode Q2 respectively with the control terminals of relay RY1 second
STCH_OFF1 and the second control terminals of relay RY2 STCH_OFF1 electrical connections；The triode Q2 base terminals with it is described short
Road protection circuit electrical connection.Control relay circuit is also intelligent switching control circuit；ON_CT low and high level comes from letter
Computation chip in master control circuit 100 is ceased, computation chip is reflected in its controlling switch according to the corresponding information of detection, works as ON_
During the input high level of CT ends, by R54 current limlitings, the Q1 conductings of driving triode, STCH_ON is caused to drag down, magnetic latching relay closes a floodgate,
Current channel connects；When STCH_OFF ends input high level, turned on by R55 current limlitings, Q2, cause STCH_OFF1 to drag down, magnetic is protected
Hold relay to open a sluice gate, current channel disconnects.The live wire that relay RY1 controls are registered one's residence, the zero line that relay RY2 controls are registered one's residence.
Another embodiment is provided on the basis of above example, with reference to shown in figure 10, in addition to, it is total with described information
Control the remote monitoring server 900 that circuit 100 electrically connects.Remote monitoring server is total by data communication circuit 800 and information
Circuit 100 is controlled, the data message of monitoring is transmitted, uses the remote monitoring of user and staff；Communication group is root
It is divided into GPRS and WIFI communication according to customer demand difference.Client (terminal device such as mobile phone, flat board, computer) APP passes through them
Wireless link product, so as to user will be seen that the electricity consumption situation of oneself, detect line fault, also can Remote it is corresponding
Circuit etc..It is the platform that product and client enter row information exchange.
Another embodiment is provided on the basis of above example, with reference to shown in 1~Figure 10 of figure；Lightning protection device group is connected in parallel on
Civil power is registered one's residence in the intelligent control box of front end, and when product sensing voltage of registering one's residence is struck by lightning and during power network surge, lightning protection device, which has, to be inhaled
Surge effect is received, it is (right that Thermal Cutoffs (caused overtemperature protection on induction line), piezo-resistance are connected between live wire and zero line
Voltage carry out clamper), again by air discharge tube connection the earth discharged；When indirect lightning strike and excessive surge, extremely short
Time in conducting shunting, so as to avoid infringement (but itself can damage) of the surge to other equipment in loop.With preventing for routine
Thunder device (Surge Protector) is not both that this product increase feedback circuit, feedback circuit is in live wire and zero line side fuse rear end
Increased branch road (feedback circuit is through shunt resistance, diode halfwave rectifier, then is coupled by photoelectrical coupler), adopts for single-chip microcomputer
Collect the frequency signal between live wire and zero line.Under normal working voltage operation, relay indicating light is bright, and provides single-chip microcomputer normal half
Frequency signal.When because of the fuse of broken by lightning lightning protection device, feedback circuit no signal, indicator lamp does not work, single-chip microcomputer collection
During less than signal, just remind user to change lightning protection device by alarm lamp and wireless communication mode (see Fig. 2).D/C power is defeated
Go out group.This group is connected in parallel on input and provides galvanic current source for follow-up line controller, communication group.Always/separating brake control group.
This group equivalent to user power utilization total line controlling switch, except this is also functional such as to inputting the voltage detecting of civil power, total electricity consumption
Flow detection, detection of electrical leakage (separating brake control group does not have), cable temperature detection, frequency detecting, power detection, electric energy metrical and detection
Fault electric arc.Corresponded to/brownout voltage protection, overload protection, short-circuit protection, earth leakage protective, overheat protector.The cable of this product
Temperature detection is different from the intelligent distribution box environment measuring of in the market, and this product judges that electronic box Significance for Environment is little.Many feelings
Occur under condition as rear terminal shortcircuit front end electronic box do not trip, situation of being failure to actuate, reason may is that rear end cable rated current not
The temperature of cable is caused to rise when matching or cable aging, short circuit, generation electric arc, when fire has occurred for cable thawing, at this moment
Electronic box environment measuring does not have any protective effect.And this product can be preferably using the scheme of cable arrangement temperature sensor
Detection can effectively avoid above-mentioned condition, be user power utilization because overload, short circuit, electric arc etc. bring the too high situation of line temperature
Double check, double shield are provided.And this product detects that cable temperature can take intelligent protection measure when too high, according to each
The electric current on road, the closing respective channel successively of temperature conditions intelligence, after the scheme by closing passage is implemented at a temperature of cable
Drop, can intelligent decision any bar circuit the problem of, and prompt to have there is a problem on user's any bar circuit.The fault electric arc of this product
Detection is an innovation of distribution box class product, and the arc detection of this product is analyzed using unique algorithm by software algorithm
Current waveform, can intelligent decision go out electric arc caused by either contact is bad in electronic box, or back end of line problem or
Electric arc caused by electrical connector contact is bad.The present situation occurred on intelligent reminding subscribers' line, avoid that fire, event of hurting sb.'s feelings occurs
Damaged with unnecessary electrical equipment.Communication group is to be divided into GPRS and WIFI communication according to customer demand difference.Client (mobile phone, is put down
The terminal devices such as plate, computer) APP is by their wireless link products, so as to which user will be seen that electricity consumption situation, the detection of oneself
To line fault, also can the corresponding circuit of Remote etc..It is the platform that product and client enter row information exchange.
It should be noted that above-described embodiment can independent assortment as needed.Described above is only of the present utility model
Preferred embodiment, it is noted that for those skilled in the art, do not departing from the utility model principle
On the premise of, some improvements and modifications can also be made, these improvements and modifications also should be regarded as the scope of protection of the utility model.
Claims (9)
- A kind of 1. intelligent wireless controller switching equipment of fault detect, it is characterised in that including：Information master control circuit, and with it is described Lightning protection circuit, main line current detection circuit, main line voltage detection circuit, the short-circuit protection electricity of information master control circuit electrical connection Road, electric-leakage detection circuit, control relay circuit；The lightning protection circuit is connected in parallel on the end of incoming cables of the intelligent power distribution equipment power supply line, is set in the intelligent power distribution The main line current detection circuit, main line voltage detection circuit and detection of electrical leakage electricity are provided with standby AC power Road, main line current signal, main line voltage signal and leakage current signal that related circuit detects are sent to information master control Circuit, when an exception occurs, described information master control circuit send corresponding order to the control relay circuit, cut-out relay Device is stopped；The short-circuit protection circuit also electrically connects with the main line current detection circuit, by the main line current signal detected Short-circuit signal is converted into control signal by the short-circuit protection circuit, and the control signal is sent to the Control Circuit；When short trouble occurs, block system relay is stopped.
- 2. the intelligent wireless controller switching equipment of a kind of fault detect according to claim 1, it is characterised in that the lightning protection is protected Protection circuit includes：3 insurance devices RF1, RF2, RF3；Fuse and piezo-resistance are encapsulated one by the insurance device, wherein First end is fuse end, and the second end is fuse end and piezo-resistance public connecting end, and the 3rd end is piezo-resistance end；Surge Protector G1, photoelectrical coupler U1；The zero line AC-L of power supply respectively with the first end of the insurance device RF1 and the insurance device RF3 first End electrical connection；The second end of the insurance device RF1 and the second end of the insurance device RF2 jointly with current-limiting resistance R1 the One end electrically connects, the second end of the current-limiting resistance R1 respectively with diode D1 anode tap and light emitting diode D2 cathode terminal Electrical connection, the cathode terminal of the diode D1 electrically connect with the photoelectrical coupler U1 anode taps；The photoelectrical coupler U1 is cloudy Extremely the 3rd of the anode tap with light emitting diode D2, the second end of the insurance device RF2 and the insurance device RF3 respectively End electrical connection；The electrical connection corresponding with described information master control circuit of the collector and emitter of the photoelectrical coupler；First end of the insurance device RF1 and the insurance device RF2 the 3rd end jointly with Surge Protector G1 electrically connects, The second end of the Surge Protector G1 electrically connects with ground PE；The zero line side AC-N of power supply electrically connects with the first end of the insurance device RF2.
- A kind of 3. intelligent wireless controller switching equipment of fault detect according to claim 1, it is characterised in that the main line electricity Current detection circuit includes：Current Transmit 1；The positive terminal CTL1 of the Current Transmit 1 is electrically connected with resistance R18 first end and resistance R14 first end respectively Connect, the second end of the resistance R18 electrically connects with common GDNA, the second end and the described information master control of the resistance R14 Circuit electrically connects；The negative pole end CTL2 of the Current Transmit 1 is electrically connected with resistance R20 first end and resistance R24 first end respectively Connect, the second end of the resistance R20 electrically connects with the common GDNA, the second end of the resistance R24 and described information Master control circuit electrically connects.
- A kind of 4. intelligent wireless controller switching equipment of fault detect according to claim 1, it is characterised in that the main line electricity Pressure detection circuit includes：Clamp diode D8；Communication power supply is filtered by common mode inductance LMC2, filtered zero line AC-L by divider resistance R30, Electrically connected respectively with divider resistance R34 first end and clamp diode D8 the first signal end after R31, R32；The clamper two Pole pipe D8 the first signal end is also electrically connected by resistance R33 with information master control circuit；Filtered zero line side AC-N believes with the second end of the divider resistance R34 and the second of the clamp diode D8 respectively Number end electrical connection；The secondary signal end of the clamp diode D8 also electrically connects with information master control circuit, the clamp diode D8 the 3rd control terminal electrically connects with the first power end.
- A kind of 5. intelligent wireless controller switching equipment of fault detect according to claim 3, it is characterised in that the electric leakage inspection Slowdown monitoring circuit includes：Current transformer ZCT1, operational amplifier U7, reference voltage source U8；The cathode output end of the current transformer ZCT1 is electrically connected by current-limiting resistance R19 with resistance R21 first end；It is described Resistance R21 first end is also electrically connected by current-limiting resistance R22 with operational amplifier U7 the first inverting input；The computing Amplifier U7 the first inverting input is also electrically connected by current-limiting resistance R15 and the operational amplifier U7 the first output end Connect, form negative feedback network；Current transformer ZCT1 cathode output end is electrically connected by current-limiting resistance R28 with the second end of the resistance R21；It is described Resistance R21 the second end is also electrically connected by current-limiting resistance R25 with the first normal phase input end of the operational amplifier U7；The first normal phase input end of the operational amplifier U7 is also by current-limiting resistance R27 respectively with the operational amplifier U7's Second inverting input and the operational amplifier U7 the second output end electrically connect, the voltage output of the reference voltage source U8 Reference edge is electrically connected by divider resistance R35 with the second normal phase input end of the operational amplifier U7, the operational amplifier U7 the second normal phase input end also electrically connects with divider resistance R37 first ends, the ends of divider resistance R37 second and common Electrical connection；The first output end of the operational amplifier U7 is electrically connected by current-limiting resistance R23 with analog to digital conversion circuit.
- 6. the intelligent wireless controller switching equipment of a kind of fault detect according to claim 5, it is characterised in that also include described Analog to digital conversion circuit：Modulus conversion chip U6；Modulus conversion chip U6 electrically connects with the electric-leakage detection circuit and information master control circuit respectively.
- 7. the intelligent wireless controller switching equipment of a kind of fault detect according to claim 3, it is characterised in that the short circuit is protected Protection circuit includes：Two-way operational amplifier U9, two-way differential comparator U10；The positive terminal CTL1 of the Current Transmit 1 passes through the first of the current-limiting resistance R39 and two-way operational amplifier U9 Reverse input end electrically connects；The positive terminal CTL1 of the Current Transmit 1 also passes through current-limiting resistance R56 and the two-way computing Amplifier U9 the second positive input electrical connection；The negative pole end CTL2 of Current Transmit 1 by current-limiting resistance R44 and the two-way operational amplifier U9 first just Electrically connected to input；The negative pole end CTL2 of Current Transmit 1 also passes through current-limiting resistance R58 and the two-way operation amplifier Device U9 the second reverse input end electrical connection；The first output end of the two-way operational amplifier U9 pass through current-limiting resistance R40 and the two-way operational amplifier U9 the One reverse input end electrically connects, and forms feedback network；The second output end of the two-way operational amplifier U9 pass through current-limiting resistance R59 and the two-way operational amplifier U9 the Two reverse input ends electrically connect, and form feedback network；The first output end of the two-way operational amplifier U9 and the public connecting end of the second output end by current-limiting resistance R49, Divider resistance R50 electrically connects with the first normal phase input end of the two-way differential comparator U10；The two-way differential comparator First end of U10 the first normal phase input end also with divider resistance R51 electrically connects, the second end of the divider resistance R51 and institute State publicly GNDA electrical connections；The first reverse input end of two-way differential comparator U10 first end and divider resistance with divider resistance R45 respectively R42 first end electrical connection, the second end of the divider resistance R45 electrically connect with the publicly GNDA, the divider resistance R42 the second end electrically connects with the first power end；The first output end of the two-way differential comparator U10 electrically connects with diode D15 anode tap, the diode D15 Cathode terminal electrically connected with the second positive input of the two-way differential comparator U10；Cathode terminal of the second positive input of the two-way differential comparator U10 also with diode D16 electrically connects, two pole Pipe D16 anode tap electrically connects with described information master control circuit；The second reverse input end of two-way differential comparator U10 first end and divider resistance with divider resistance R43 respectively R41 first end electrical connection, the second end of the divider resistance R433 electrically connect with the publicly GNDA, the divider resistance R41 the second end electrically connects with first power end；The second output end STCH_OFF of the two-way differential comparator U10 electrically connects with the control relay circuit.
- A kind of 8. intelligent wireless controller switching equipment of fault detect according to claim 7, it is characterised in that the relay Control circuit includes：Two triodes Q1 and Q2, relay RY1 and RY2；The collector terminal of the triode Q1 respectively with relay RY1 the first control terminal STCH_ON and relay RY2 First control terminal STCH_ON is electrically connected, and the base terminal of the triode Q1 electrically connects with described information master control circuit；The collector terminal of the triode Q2 respectively with relay RY1 the second control terminal STCH_OFF1 and the relay The second control terminals of RY2 STCH_OFF1 is electrically connected；The triode Q2 base terminals electrically connect with the short-circuit protection circuit.
- 9. according to a kind of intelligent wireless controller switching equipment of any described fault detects of claim 1-8, it is characterised in that also wrap Include：The remote monitoring server electrically connected with described information master control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720914309.0U CN207010221U (en) | 2017-07-26 | 2017-07-26 | A kind of intelligent wireless controller switching equipment of fault detect |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720914309.0U CN207010221U (en) | 2017-07-26 | 2017-07-26 | A kind of intelligent wireless controller switching equipment of fault detect |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207010221U true CN207010221U (en) | 2018-02-13 |
Family
ID=61457135
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720914309.0U Active CN207010221U (en) | 2017-07-26 | 2017-07-26 | A kind of intelligent wireless controller switching equipment of fault detect |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207010221U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108539865A (en) * | 2018-05-31 | 2018-09-14 | 浙江永泰隆电子股份有限公司 | Electric power monitoring system |
| CN109387737A (en) * | 2018-11-30 | 2019-02-26 | 珠海格力电器股份有限公司 | Needle stand and plastic housing connection state detection system |
| CN113311361A (en) * | 2021-06-05 | 2021-08-27 | 温州理工学院 | Multi-functional wisdom power consumption monitor terminal |
| CN113442847A (en) * | 2020-03-27 | 2021-09-28 | 比亚迪股份有限公司 | Fail-safe output circuit and vehicle-mounted controller |
| CN113824097A (en) * | 2021-09-30 | 2021-12-21 | 深圳慧能泰半导体科技有限公司 | Protection circuit and charging cable |
| CN115127143A (en) * | 2022-06-30 | 2022-09-30 | 美智光电科技股份有限公司 | Operation control method and device, controller, heating equipment and storage medium |
| CN115528801A (en) * | 2022-11-28 | 2022-12-27 | 深圳市兴晟图信息技术有限公司 | Power dynamic monitoring system |
| CN116385208A (en) * | 2023-06-05 | 2023-07-04 | 吉林大学 | Method and system for processing data of energy storage power station |
-
2017
- 2017-07-26 CN CN201720914309.0U patent/CN207010221U/en active Active
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108539865A (en) * | 2018-05-31 | 2018-09-14 | 浙江永泰隆电子股份有限公司 | Electric power monitoring system |
| CN109387737A (en) * | 2018-11-30 | 2019-02-26 | 珠海格力电器股份有限公司 | Needle stand and plastic housing connection state detection system |
| CN113442847A (en) * | 2020-03-27 | 2021-09-28 | 比亚迪股份有限公司 | Fail-safe output circuit and vehicle-mounted controller |
| CN113442847B (en) * | 2020-03-27 | 2023-11-14 | 比亚迪股份有限公司 | Fail-safe output circuit and vehicle-mounted controller |
| CN113311361A (en) * | 2021-06-05 | 2021-08-27 | 温州理工学院 | Multi-functional wisdom power consumption monitor terminal |
| CN113824097A (en) * | 2021-09-30 | 2021-12-21 | 深圳慧能泰半导体科技有限公司 | Protection circuit and charging cable |
| CN113824097B (en) * | 2021-09-30 | 2024-03-12 | 深圳慧能泰半导体科技有限公司 | Protection circuit and charging cable |
| CN115127143B (en) * | 2022-06-30 | 2023-08-25 | 美智光电科技股份有限公司 | Operation control method, device, controller, heating equipment and storage medium |
| CN115127143A (en) * | 2022-06-30 | 2022-09-30 | 美智光电科技股份有限公司 | Operation control method and device, controller, heating equipment and storage medium |
| CN115528801B (en) * | 2022-11-28 | 2023-03-17 | 深圳市兴晟图信息技术有限公司 | Power dynamic monitoring system |
| CN115528801A (en) * | 2022-11-28 | 2022-12-27 | 深圳市兴晟图信息技术有限公司 | Power dynamic monitoring system |
| CN116385208A (en) * | 2023-06-05 | 2023-07-04 | 吉林大学 | Method and system for processing data of energy storage power station |
| CN116385208B (en) * | 2023-06-05 | 2023-10-03 | 吉林大学 | Method and system for processing data of energy storage power station |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN207010221U (en) | A kind of intelligent wireless controller switching equipment of fault detect | |
| CN201570904U (en) | Three-phase intelligent alternating current power distribution box | |
| CN207398896U (en) | A kind of charging equipment of tape jam detection | |
| CN103560479B (en) | A kind of loaded line failure detector circuit being applied to chopper reclosing and method | |
| CN207354054U (en) | The electric power system of online power equipment monitoring system | |
| CN103326334B (en) | A kind of thyristor rectifier tractive power supply system and guard method | |
| CN109975698A (en) | A kind of motor contactor fault detection means and detection method | |
| CN108183462A (en) | For the electric protective device and electrical equipment of electrical equipment | |
| CN201563174U (en) | Video monitoring front-end control box | |
| CN201616596U (en) | Single-phase intelligent type alternating-current distribution box | |
| CN209561923U (en) | Intelligent railway weak electric system power lightning protection distribution device | |
| CN208874279U (en) | A kind of improved breaker body unbalanced three-phase lines outlet loop | |
| CN204945313U (en) | A kind of high voltage direct current distribution insulation against ground supervisory device | |
| CN209460391U (en) | A kind of intelligent electric energy meter safety detection circuit and intelligent electric energy meter | |
| CN201515205U (en) | Earth leakage checking protective circuit | |
| CN207557400U (en) | A kind of low voltage failure circuit investigates instrument | |
| CN206712447U (en) | A kind of leakage protection circuit with overvoltage protection | |
| CN110311357A (en) | A kind of Backup Protection Device for Transformer accelerated using nearly bus electric arc | |
| CN206378569U (en) | A kind of voltage relay abnormal detector | |
| CN206573629U (en) | A kind of load self-adapting current measurement and protection device | |
| CN107064725A (en) | A kind of distribution transformer outlet junction contacts state on_line monitoring method and system | |
| CN204925230U (en) | Single -phase residual capacity signal trigger ware | |
| CN201429663Y (en) | On-line detection device for surge protector | |
| CN207588116U (en) | A kind of AC line protection device with active current limliting and carrier wave | |
| CN208999481U (en) | Monitoring device is scurried into the exchange of substation's low-voltage direct-current system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |