CN105424998B - Three-phase intelligent electric-energy meter based on real-time collection residual current technology - Google Patents
Three-phase intelligent electric-energy meter based on real-time collection residual current technology Download PDFInfo
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Abstract
It is an object of the invention to solve the problems of prior art, find the three-phase intelligent electric-energy meter based on real-time collection residual current technology, actively investigation electric leakage, including housing, terminal block is installed on housing, residual current transformer, A phase lines, B phase lines, C phase lines, zero line and relay are provided with housing, A phase lines, B phase lines, C phase lines, zero line pass through residual current transformer, in addition to：Amplifier, amplifier in are connected with residual current transformer output end；Comparator, comparator input terminal are connected with amplifier out, and comparator is by residual current value compared with threshold value set in advance, and when residual current is more than threshold value, comparator output terminal exports comparative result signal；Single-chip microcomputer, singlechip interruption mouth are connected with comparator output terminal, single-chip microcomputer output connection Control line, the single-chip microcomputer comparative result signal output relay control signal that fracture receives in.Improve the real-time of investigation.
Description
Technical field
The invention belongs to power domain, and in particular to the three-phase intelligent electric-energy meter based on real-time collection residual current technology.
Background technology
The A of Publication No. CN 104374964 innovation and creation disclose a kind of electric energy meter of measurable residual current, including
Housing, terminal block, phase line, zero line, relay, phase line current sampling resistor, residual current transformer and circuit arrangement；After
Electrical equipment, phase line current sampling resistor and residual current transformer are arranged in housing；Phase line and zero line are mutual through residual current
Sensor；Circuit arrangement include voltage sample module, signal processing module, A/D modular converters, electric energy metering module, at single-chip microcomputer
Manage module, relay control module, communication module, LCD display module, key-press module and power module.The innovation and creation can be real
Now the residual current in subscribers' line is measured, recorded, and there is residual current overload alarm event and logout work(
Can, it need to be only improved on existing intelligent electric meter, improving cost is not high, and does not influence the function and profile of existing electric energy meter
Size, it is easy to be widely applied, its deficiency is：The electric energy meter cannot be used for three-phase electrical power system, while real-time is not strong, right
For intelligent electric energy meter, it realizes many sophisticated functions, the single task operating system of use, and being unable to real-time, freedom between task cuts
Change, and residual current value passively obtains for single-chip microcomputer, former mode is can not to read residual current value in real time, only singly
When piece machine-cut shifts to reading computation chip residual current value task, single-chip microcomputer could whether superthreshold judges to this value, and
For detecting residual current essence, inherently there is randomness and sudden in electric leakage, if do not used interrupt mode, so must
So can not real-time capture electric leakage presence.
The content of the invention
It is an object of the invention to solve the problems of prior art, find a kind of based on collection residual current in real time
The three-phase intelligent electric-energy meter of technology, the residual current in three-phase electrical power system can be detected in real time, and traditional passive investigation is leaked
Active investigation mode is electrically updated to, improves the real-time of investigation.
In order to realize purpose, the present invention is based on the real-time three-phase intelligent electric-energy meter for gathering residual current technology, including shell
Body, terminal block is installed on the housing, residual current transformer, A phase lines, B phase lines, C phase lines, zero line are provided with housing
And for controlling the relay of A phase lines, B phase lines, C phase line break-makes, A phase lines, B phase lines, C phase lines, zero line pass through residual current
Transformer, A phase lines both ends, B phase lines both ends, C phase lines both ends, zero line both ends are connected with terminal block, in addition to：
Amplifier, the input of amplifier and the output end of residual current transformer connect, by residual current transformer
Output signal is amplified；
Comparator, the input of comparator are connected with the output end of amplifier, by the output signal of residual current transformer
It is used as input compared with reference threshold set in advance after amplification and exports comparative result signal；
Single-chip microcomputer, single-chip microcomputer include middle fracture, and the middle fracture of single-chip microcomputer is connected with the output end of comparator, single-chip microcomputer it is defeated
Go out the control line of end connection relay, the single-chip microcomputer comparative result signal output relay control signal that fracture receives in.
Preferably, the relay includes three contacts, the A phase lines, B phase lines, respectively sets a contact in C phase lines.
Relay controls corresponding A phase line, B phase lines, the break-make of C phase lines by contact.
Preferably, after singlechip interruption mouth receives the comparative result signal of comparator output, the current leakage of single-chip microcomputer record
Time of origin that electric current transfinites, leakage current value size, charge value this moment.Can be by communication port copy reading or by time showing aobvious
On showing device or active reporting, while it can also carry out early warning.
Preferably, single-chip microcomputer is provided with PWM or timer output end mouth, and comparator is provided with external threshold reference value input
Mouthful, PWM or timer output end mouth are connected with reference value input port, and single-chip microcomputer passes through PWM or the pulse width modulation mode of timer
The threshold value of comparator is adjusted, so as to adjust leakage current test threshold value.
Preferably, terminal block includes the first binding post, the second binding post, the 3rd binding post, the 4th wiring
Terminal, the 5th binding post, the 6th binding post, the 7th binding post and the 8th binding post, one end of zero line connect with the 7th
Line terminals electrically connect；The other end of zero line electrically connects with the 8th binding post；One end of A phase lines is electrically connected with the first binding post
Connect, the other end electrically connects with the second binding post；One end of B phase lines electrically connects with the 3rd binding post, and the other end connects with the 4th
Line terminals electrically connect；One end of C phase lines electrically connects with the 5th binding post, and the other end electrically connects with the 6th binding post.
Preferably, the 7th binding post and the 8th binding post are mutually isolated.
Preferably, relay and residual current transformer integrative packaging.Optimize internal wiring structure, reduce Electrical Safety
Hidden danger, improve electricity consumption reliability.
Preferably, encapsulating shell is provided with the housing, the relay is arranged in encapsulating shell with residual current transformer,
The encapsulating shell lower end is fixedly connected with sheet metal, and the encapsulating shell is fixed by sheet metal and terminal block.Realize relay
The integrative packaging of device and residual current transformer, optimize internal wiring structure, reduce Electrical Safety hidden danger, it is reliable to improve electricity consumption
Property, it is connected by sheet metal with terminal block, easy for installation, sheet metal can be used as connector by A phase lines, B phase lines, C phase lines
Or zero line electrically connects with terminal block.
Preferably, the fixed part for being used for fixing A phase lines is provided with the encapsulating shell, the fixed part is included up and down slidably
Upper slide on the package is set and lower skateboard on the package is slidably set up and down, the lower skateboard is located at upper slide
Lower end, the upper slide upper end is provided with the upper mounted plate being horizontally installed on encapsulating shell, between fixed plate and upper slide
Provided with upper spring, the upper spring upper end is fixedly connected with upper mounted plate, lower end is fixedly connected with upper slide, under the lower skateboard
End is provided with the bottom plate being horizontally installed on encapsulating shell, lower spring is provided between the lower skateboard and bottom plate, under described
Lower spring end is fixedly connected with bottom plate, upper end and lower skateboard are connected.It is easy to fix residual current transformer and A phase lines.
Preferably, the upper slide is provided with the upper circuit fixing device for A phase lines, and the encapsulating shell is located at upper slide
The upper deflector apron corresponding with upper circuit fixing device position is vertically and fixedly provided with top, the upper circuit fixing device includes
The upper straight rod being vertically fixed on upper slide, the upper straight rod is rotatably connected to upper thread jamming part away from that one end of upper slide, described
Upper thread jamming part include top from top to bottom towards the inclined upper inclined portion in upper slide side, the opening upper semi-circle facing forward of bottom
Arc Access Division, upper thread jamming part middle part are rotatablely connected with upper straight rod, and that one end of deflector apron is semi arch to upper inclined portion upwardly
Shape, that side of upper deflector apron circuit fixing device upwardly are provided with upper guide groove, the upper guide groove anterior-posterior length
More than the length of upper inclined portion, the upper guide groove tilts obliquely from front to back, and the upper guide groove front position is positioned at upper
Above rake；
The lower skateboard is provided with the lower circuit fixing device for being used for fixing A phase lines, and the encapsulating shell is located under lower skateboard
Square place is vertically and fixedly provided with the lower deflector apron corresponding with lower circuit fixing device position, and the lower circuit fixing device includes hanging down
The straight lower straight-bar being fixed on lower skateboard, the lower straight-bar is rotatably connected to lower card line portion in that one end away from lower skateboard, under described
Thread jamming part include bottom from top to bottom towards the inclined lower rake in lower skateboard side, the opening lower half circular arc facing forward on top
Access Division, it is rotatablely connected with lower straight-bar in the middle part of lower card line portion, that one end of deflector apron is semicircular arc to lower rake downwards, institute
That side for stating lower deflector apron circuit fixing device downwards is provided with lower guide groove, under the lower guide groove anterior-posterior length is more than
The length of rake, the lower guide groove tilt obliquely from front to back, and the lower guide groove front position is located at lower rake
Lower section.Phase line, zero line easily can be fixed by upper and lower circuit fixing device, prevent its movement, consolidated by upper and lower circuit
Determine device and be supplied to upper and lower one active force of slide plate, further clamp residual current transformer.
Following advantageous effects can be obtained by implementing the present invention：Monitor residual current in real time completely, can be to residue
Current value carries out early warning, records intelligent electric meter residual current event, and active reporting, and traditional passive investigation electric leakage mode is updated
For active investigation mode.Integrative installation technology, optimize internal wiring structure, reduce Electrical Safety hidden danger, it is reliable to improve electricity consumption
Property.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention；
Fig. 2 is residual current transformer, amplifier, comparator, the connection figure of single-chip microcomputer in the present invention；
Fig. 3 is the structural representation after the present invention improves；
Fig. 4 is the structural representation of fixed part when fixed part does not place residual current transformer in the present invention；
Fig. 5 is the structural representation of fixed part when fixed part places residual current transformer in the present invention.
Embodiment
For the ease of the understanding of those skilled in the art, the present invention is made further with reference to specific embodiment
It is bright：
As shown in FIG. 1 to 3, the three-phase intelligent electric-energy meter based on real-time collection residual current technology, including housing 1, shell
Terminal block 2 is installed on body 1, relay 3 and residual current transformer 4, A phase lines 5, B phase lines 6, C phases are provided with housing 1
Line 7 and zero line 8, A phase lines 5, B phase lines 6, C phase lines 7, zero line 8 pass through residual current transformer 4；Terminal block 2 includes first
Binding post 21, the second binding post 22, the 3rd binding post 23, the 4th binding post 24, the 5th binding post the 25, the 6th connect
Line terminals 26, the 7th binding post 27 and the 8th binding post 28, one end (end of incoming cables) and the first binding post 21 of A phase lines 5
Electrical connection, the other end (leading-out terminal) electrically connect with the second binding post 22；One end (end of incoming cables) of B phase lines 6 and the 3rd terminals
Son 23 electrically connects, and the other end (leading-out terminal) electrically connects with the 4th binding post 24；One end (end of incoming cables) of C phase lines 7 connects with the 5th
Line terminals 25 electrically connect, and the other end (leading-out terminal) electrically connects with the 6th binding post 26, one end (end of incoming cables) and the 7th of zero line 8
Binding post 27 electrically connects, and the other end (leading-out terminal) of zero line 8 electrically connects with the 8th binding post 28, the 7th binding post 27 with
8th binding post 28 is mutually isolated, and relay 3 includes three contacts 31, A phase lines 5, B phase lines 6, each in C phase lines 7 sets one
Contact 31, contact 31 are normally-closed contact, can be controlled by the contact 31 of relay 3 A phase lines 5, B phase lines 6, C phase lines 7 it is logical
Disconnected, A phase lines are provided with A phase current mutual inductors 11, and B phase lines are provided with B phase current mutual inductors 12, and it is mutual that C phase lines are provided with C phase currents
Sensor 13, the three-phase intelligent electric-energy meter based on real-time collection residual current technology also include：Amplifier, the input of amplifier with
Output end 41 (output line) connection of residual current transformer 4, amplifier amplify the output signal of residual current transformer 4；
Comparator, the input of comparator are connected with the output end of amplifier, will make after the output signal amplification of residual current transformer
To input with threshold value set in advance compared with and exporting comparative result signal, comparative result signal includes interrupt signal and non-
Interrupt signal；Single-chip microcomputer, single-chip microcomputer include middle fracture, and the middle fracture of single-chip microcomputer is connected with the output end of comparator, single-chip microcomputer
Output end connects the control line 32 of relay 3, the single-chip microcomputer comparative result signal output Control that fracture receives in
Signal, relay 3 control A phase lines 5, B phase lines 6, the break-make of C phase lines 7 after receiving the control signal of single-chip microcomputer.
Single-chip microcomputer is provided with PWM or timer output end mouth, and comparator is provided with external threshold reference value input port, PWM or
Timer output end mouth is connected with reference value input port, and single-chip microcomputer is compared by the regulation of the pulse width modulation mode of PWM or timer
The threshold value of device, so as to adjust leakage current test threshold value.
The electrical equipment of Electricity customers is when switching access, if that can cause taiwan area transformer leakage protector during electric leakage
Action, after earth leakage protective device tripping, after a while can automatic closing again, the electrical equipment leaked electricity in this process can
Power network can would not be accessed, automatic closing success, such unit-area management personnel can not position which electricity consumer leaks electricity again
It problem, also just can not at all fix a breakdown, when the equipment access system again of electric leakage, also occur that earth leakage protective device moves again
Make problem, so repeatedly, to contradiction is caused between power supply enterprise and electricity consumer, cause certain economic loss and potential safety hazard.
After this programme, amplifier amplifies residual current transformer output signal, the reference threshold of signal and comparator after amplification
Value compares, in real time by residual current value compared with threshold value set in advance, if residual current value is not above threshold value,
Comparator exports non-disruptive signal, the disconnection of single-chip microcomputer not control relay contact；Once residual current value exceedes threshold value, compare
Device exports interrupt signal and gives singlechip interruption interface, after single-chip microcomputer receives interrupt signal, real-time response processing, and control relay
The disconnection of device contact；Also it can be tripped or not trip operation, while recorded current by control relay according to inner setting
The time for the generation that leakage current transfinites, residual current value and some relevant parameters this moment, the data of record can pass through communication port
Copy reading or by time showing on the display apparatus or active reporting, can also carry out corresponding early warning operation, prompt have electric leakage.When
When needing to adjust the threshold value of comparator, corresponding threshold value is issued by the communication port of intelligent electric meter, single-chip microcomputer is according to the threshold issued
The pulsewidth of value regulation PWM/ timers, so as to change reference voltage threshold.This programme can guarantee that the real-time of maximum, not by meter
Chip channel is measured, by special designs passage, when threshold value is exceeded, actively exports corresponding interrupt signal to single-chip microcomputer, it is single
Piece machine can be handled in real time, in the absence of the situation of leakage.
As shown in figure 1, being provided with encapsulating shell 14 in housing, relay 3 is arranged on encapsulating shell 14 with residual current transformer 4
Interior, the lower end of encapsulating shell 14 is fixedly connected with sheet metal 141, and encapsulating shell 14 is fixed by sheet metal 141 and terminal block 2.It is real
The integrative packaging of existing relay 3 and residual current transformer 4, optimizes internal wiring structure, reduces Electrical Safety hidden danger, improves
Electricity consumption reliability, it is connected by sheet metal 141 with terminal block 2, it is easy for installation；Sheet metal 141 can be used as connector by A phases
Line, B phase lines, C phase lines or zero line electrically connect with terminal block 2, and by taking A phase lines as an example, encapsulating shell is fixed in the one end of sheet metal 141
14 A phase lines lower end, the other end of sheet metal 141 are connected with the second binding post 22 in terminal block, the gold after connection
Belonging to piece 141 can be as a part for A phase lines；Similarly, B phase lines, C phase lines, zero line can also pass through sheet metal and corresponding wiring
Terminal electrically connects.
As shown in figure 3, in order to more convenient, stable fixed relay 3 and residual current transformer 4, relay 3 and surplus
Aftercurrent transformer 4 is each provided in encapsulating shell.
As shown in Fig. 3~Fig. 5, in order to more convenient, stable fixation residual current transformer and A phase lines, in encapsulating shell
Fixed part 9 provided with fixed A phase lines 5, fixed part include the upper slide 901 being slidably arranged on up and down on encapsulating shell 14 and up and down
The lower skateboard 902 being slidably arranged on encapsulating shell 14, lower skateboard 902 are located at the lower end of upper slide 901, and the upper end of upper slide 901 is set
There is the upper mounted plate 903 being horizontally installed on encapsulating shell 14, upper spring 904 be provided between upper mounted plate 903 and upper slide 901,
The upper upper end of spring 904 is fixedly connected with upper mounted plate 903, lower end is fixedly connected with upper slide 901, and the lower end of lower skateboard 902 is provided with
The bottom plate 905 being horizontally installed on encapsulating shell 14, lower spring 906 is provided between lower skateboard 902 and bottom plate 905, under
The lower end of spring 906 is fixedly connected with bottom plate 905, upper end and lower skateboard 902 are connected.
As shown in figure 4, upper slide 901 is provided with the upper circuit fixing device 91 for being used for fixing A phase lines, encapsulating shell 14 is located at
The upper deflector apron 92 corresponding with the upper position of circuit fixing device 91 is vertically and fixedly provided with the top of upper slide 901, upper circuit is consolidated
Determine the upper straight rod 911 that device 91 includes being vertically fixed on upper slide 901, upper straight rod 911 rotates away from that one end of upper slide 901
Be connected with thread jamming part 912, upper thread jamming part 912 include top from top to bottom towards the inclined upper inclination in the side of upper slide 901
Portion 9121, the opening of bottom upper half circular arc Access Division 9122 facing forward, upper thread jamming part middle part are rotatablely connected with upper straight rod 911,
That one end of deflector apron 92 is semicircular arc to upper inclined portion 9121 upwardly, upper deflector apron 92 circuit fixing device 91 upwardly
That side be provided with upper guide groove 921, the upper anterior-posterior length of guide groove 921 is more than the length of upper inclined portion 9121, upper guide groove 921
Tilt obliquely from front to back, the upper front position of guide groove 921 is located at the top of upper inclined portion 9121.
As shown in figure 4, the both ends of lower skateboard 902 are equipped with the lower circuit fixing device 93 for A phase lines, encapsulating shell 14 is located at
The lower deflector apron 94 corresponding with the lower position of circuit fixing device 93 is vertically and fixedly provided with the lower section of lower skateboard 902, lower circuit is consolidated
Determine the lower straight-bar 931 that device 93 includes being vertically fixed on lower skateboard 902, lower straight-bar 931 rotates away from that one end of lower skateboard 902
Be connected with lower card line portion 932, lower card line portion 932 include bottom from top to bottom towards the inclined lower inclination in the side of lower skateboard 902
Portion 9321, the opening on top lower half circular arc Access Division 9322 facing forward, lower card line portion middle part are rotatablely connected with lower straight-bar 931,
That one end of deflector apron 94 is semicircular arc to lower rake 9321 downwards, lower deflector apron 94 circuit fixing device 93 downwards
That side be provided with lower guide groove 941, the lower anterior-posterior length of guide groove 941 is more than the length of lower rake 9321, lower guide groove 941
Tilt obliquely from front to back, the lower front position of guide groove 941 is positioned at the lower lower section of rake 9321.
As shown in figure 4, under original state, the distance between upper slide 901 and lower skateboard 902 are less than residual current transformer
Thickness, first by A phase lines be placed on corresponding on upper half circular arc Access Division 9122 and lower half circular arc Access Division 9322, will be upper
The upward sliding of slide plate 901, by the slide downward of lower skateboard 902, residual current transformer 4 is then inserted into upper slide 901 with gliding
Between plate 902, upper spring 904 has downward elastic force, lower spring 906 to have upward elastic force to lower skateboard 902 to upper slide 901,
So as to clamp residual current transformer, in order to preferably fix residual current transformer, the lower end of upper slide 901 and lower skateboard 902
Upper end is equipped with rubber blanket, and the upper surface both ends of upper slide 901 are provided with downward extension, and the lower surface both ends of lower skateboard 902 are provided with
Upward extension, residual current transformer both ends are clamped by extension, now, as shown in figure 5, upper inclined portion 9121 because
In the presence of upper guide groove 921, upper inclined portion 9121 rotates to orientation substrate, and then drives 9122 turns of upper half circular arc Access Division
Dynamic, upper half circular arc Access Division 9122 passes through upper deflector apron 92 and upper half circular arc Access Division close to upper deflector apron 92
9122 cooperations clamp A phase lines 3, and when clamping A phase lines, upper straight rod 911 can not move up, and downward by upper thread jamming part 912
Active force, and then upper straight rod 911 applies downward active force to upper slide 901；Similarly lower skateboard 902 is by lower straight-bar 931
The active force upward to its, and then the clamping effect of upper slide 901 and lower skateboard 902 to residual current transformer is improved, simultaneously
A phase lines are also fixed by lower card line portion 932, if moreover, do not take out residual current transformer, lower card line portion 932 and upper thread jamming part
912 can not be rotated, and A live wires are fixed by upper circuit fixing device 91 and lower circuit fixing device 93, and take out residual current
In the case of transformer, the power slide downward under spring action of upper slide 901,902 power under spring action of lower skateboard to
Upper slip, now lower card line portion 932 and upper thread jamming part 912 are rotatable, directly can pull out A phase lines, and operation is very easy, and zero
Line and phase line fixing-stable, improve the Detection results of residual current transformer.
It can similarly be provided for fixing B phases, C phases, the fixed part of zero line, its structure and the fixation for fixing A phase lines
Portion's structure is identical.
The present invention can detect the residual current in three-phase electrical power system, increase intelligent electric meter residual current event note in real time
Record and active reporting function, tripping operation guarantor can only be carried out when residual current transfinites failure by solving residual current operated protective device
Shield, the problem of early warning can not be carried out and monitored in real time, and traditional passive investigation electric leakage mode is updated to active investigation side
Formula.
The specific embodiment of the present invention is these are only, but the technical characteristic of the present invention is not limited thereto, any this area
Technical staff in the field of the invention, the change made or modification are all covered among the scope of the claims of the present invention.
Claims (4)
1. based on the three-phase intelligent electric-energy meter of real-time collection residual current technology, including housing, it is characterised in that on the housing
Terminal block is installed, residual current transformer, A phase lines, B phase lines, C phase lines, zero line and for controlling A are provided with housing
Phase line, B phase lines, the relay of C phase line break-makes, A phase lines both ends, B phase lines both ends, C phase lines both ends, zero line both ends and binding post
Seat connection, A phase lines, B phase lines, C phase lines, zero line pass through residual current transformer, in addition to：
Amplifier, the input of the amplifier and the output end of residual current transformer connect, by residual current transformer
Output signal is amplified；
Comparator, the input of the comparator are connected with the output end of amplifier, by the output signal of residual current transformer
It is used as input compared with reference threshold set in advance after amplification and exports comparative result signal；
Single-chip microcomputer, the single-chip microcomputer include middle fracture, and the middle fracture of single-chip microcomputer is connected with the output end of comparator, single-chip microcomputer it is defeated
Go out the control line of end connection relay, the single-chip microcomputer comparative result signal output relay control signal that fracture receives in；
Relay and residual current transformer integrative packaging；
Encapsulating shell is provided with the housing, the relay is arranged in encapsulating shell with residual current transformer, the encapsulating shell
Lower end is fixedly connected with sheet metal, and the encapsulating shell is fixed by sheet metal and terminal block；Preceding surface in the encapsulating shell
Middle part is provided with the fixed part for being used for fixing A phase lines, and the fixed part includes slidably setting upper slide on the package up and down
Lower skateboard on the package is slidably set up and down, and the lower skateboard is located at upper slide lower end, and the upper slide upper end is set
There is the upper mounted plate being horizontally installed on encapsulating shell, upper spring, the upper spring are provided between fixed plate and upper slide
Upper end is fixedly connected with upper mounted plate, lower end is fixedly connected with upper slide, and the lower skateboard lower end is provided with and is horizontally installed on encapsulation
Bottom plate on shell, is provided with lower spring between the lower skateboard and bottom plate, the lower spring lower end is consolidated with bottom plate
Fixed connection, upper end and lower skateboard connect；
The upper slide is provided with the upper circuit fixing device for A phase lines, and the encapsulating shell is located at vertical at upper slide top
The upper deflector apron corresponding with upper circuit fixing device position is fixed with, the upper circuit fixing device includes being vertically fixed on
Upper straight rod on upper slide, the upper straight rod are rotatably connected to upper thread jamming part, the upper thread jamming part bag away from that one end of upper slide
Include top from top to bottom towards the inclined upper inclined portion in upper slide side, the opening upper half circular arc clamping facing forward of bottom
Portion, be rotatablely connected with upper straight rod in the middle part of upper thread jamming part, that one end of deflector apron is semicircular arc to upper inclined portion upwardly, it is described on
That side of deflector apron circuit fixing device upwardly is provided with upper guide groove, and the upper guide groove anterior-posterior length is more than upper inclination
The length in portion, the upper guide groove tilt obliquely from front to back, and the upper guide groove front position is located above upper inclined portion；
The lower skateboard is provided with the lower circuit fixing device for being used for fixing A phase lines, and the encapsulating shell is located at lower skateboard lower section
The lower deflector apron corresponding with lower circuit fixing device position is vertically and fixedly provided with, the lower circuit fixing device includes vertical solid
The lower straight-bar being scheduled on lower skateboard, the lower straight-bar are rotatably connected to lower card line portion, the lower card line away from that one end of lower skateboard
Portion include bottom from top to bottom towards the inclined lower rake in lower skateboard side, the opening lower half circular arc clamping facing forward on top
Portion, lower card line portion middle part are rotatablely connected with lower straight-bar, and that one end of deflector apron is semicircular arc to lower rake downwards, under described
That side of deflector apron circuit fixing device downwards is provided with lower guide groove, and the lower guide groove anterior-posterior length is more than lower inclination
The length in portion, the lower guide groove tilt obliquely from front to back, and the lower guide groove front position is located at below lower rake.
2. the three-phase intelligent electric-energy meter as claimed in claim 1 based on real-time collection residual current technology, it is characterised in that：Institute
State relay and include three contacts, the A phase lines, B phase lines, a contact is respectively set in C phase lines.
3. the three-phase intelligent electric-energy meter as claimed in claim 1 based on real-time collection residual current technology, it is characterised in that：Institute
The terminal block stated connects including the first binding post, the second binding post, the 3rd binding post, the 4th binding post, the 5th
Line terminals, the 6th binding post, the 7th binding post and the 8th binding post, one end of zero line are electrically connected with the 7th binding post
Connect；The other end of zero line electrically connects with the 8th binding post；One end of A phase lines electrically connects with the first binding post, the other end with
Second binding post electrically connects；One end of B phase lines electrically connects with the 3rd binding post, and the other end is electrically connected with the 4th binding post
Connect；One end of C phase lines electrically connects with the 5th binding post, and the other end electrically connects with the 6th binding post.
4. the three-phase intelligent electric-energy meter as claimed in claim 3 based on real-time collection residual current technology, it is characterised in that：The
Seven binding posts and the 8th binding post are mutually isolated.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711348802.1A CN108037333B (en) | 2015-11-27 | 2015-11-27 | Three-phase intelligent electric energy meter with adjustable residual current threshold value |
| CN201711350578.XA CN108254599B (en) | 2015-11-27 | 2015-11-27 | Three-phase intelligent electric energy meter structure for collecting residual current |
| CN201510851375.3A CN105424998B (en) | 2015-11-27 | 2015-11-27 | Three-phase intelligent electric-energy meter based on real-time collection residual current technology |
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| CN106443101A (en) * | 2016-08-29 | 2017-02-22 | 王月园 | Three-phase electric energy meter |
| CN108646090B (en) * | 2018-07-17 | 2024-05-03 | 浙江易享节能技术服务股份有限公司 | Ammeter and ammeter control system |
| CN111693769A (en) * | 2019-03-15 | 2020-09-22 | 宁波三星智能电气有限公司 | Electric energy meter |
| CN112736846A (en) * | 2019-10-28 | 2021-04-30 | 株洲中车机电科技有限公司 | Integrated mutual inductor with leakage protection and zero sequence protection functions and application method |
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| CN108254599A (en) | 2018-07-06 |
| CN105424998A (en) | 2016-03-23 |
| CN108037333B (en) | 2020-12-11 |
| CN108254599B (en) | 2020-12-18 |
| CN108037333A (en) | 2018-05-15 |
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