CN105424998A - Three-phase intelligent electric energy meter base on real-time residual current acquisition technology - Google Patents
Three-phase intelligent electric energy meter base on real-time residual current acquisition technology Download PDFInfo
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Abstract
The invention aims at solving problems existing in prior art and thus provides a three-phase intelligent electric energy meter base on a real-time residual current acquisition technology to carry out active electricity leakage trouble shooting. The three-phase intelligent electric energy meter comprises a housing; a wiring terminal seat is installed on the housing; and a residual-current transformer, an A-phase line, a B-phase line, a C-phase line, a zero line, and a relay are arranged in the housing; and the A-phase line, the B-phase line, the C-phase line, and the zero line pass through the residual-current transformer. In addition, the three-phase intelligent electric energy meter also includes an amplifier, a comparator, and a single-chip microcomputer. The input terminal of the amplifier is connected with the output terminal of the residual-current transformer. The input terminal of the comparator is connected with the output terminal of the amplifier; the comparator compares a residual current value with a preset threshold value; when the residual current is larger than a threshold value, the output terminal of the comparator outputs a comparison result signal. An interruption port of the single-chip microcomputer is connected with the output terminal of the comparator and the output terminal of the single-chip microcomputer is connected with a control line of a relay; and the single-chip microcomputer outputs a relay control signal according to the comparison result signal received by the interruption port. Therefore, the real-time performance of troubleshooting is improved.
Description
Technical field
The invention belongs to power domain, be specifically related to the three-phase intelligent electric-energy meter based on Real-time Collection residual current technology.
Background technology
Publication number is that the innovation and creation of CN104374964A disclose a kind of electric energy meter measuring residual current, comprises housing, terminal block, phase line, zero line, relay, phase line current sampling resistor, residual current transformer and circuit arrangement; Relay, phase line current sampling resistor and residual current transformer are all arranged in housing; Phase line and zero line are through residual current transformer; Circuit arrangement comprises voltage sample module, signal processing module, A/D modular converter, electric energy metering module, single chip processing module, relay control module, communication module, LCD display module, key-press module and power module.These innovation and creation can realize measuring the residual current in subscriber's line, record, and there is residual current overload alarm event and event recording function, only need improve on existing intelligent electric meter, improving cost is not high, and do not affect function and the physical dimension of existing electric energy meter, be convenient to spread, its deficiency is: this electric energy meter can not be used for three-phase electrical power system, real-time is not strong simultaneously, for intelligent electric energy meter, it realizes a lot of sophisticated functions, the single task operating system adopted, can not switch by real-time, freedom between task, and residual electricity flow valuve is passive acquisition for single-chip microcomputer, former mode can not read residual electricity flow valuve in real time, when only having single-chip microcomputer to switch to reading computation chip residual electricity flow valuve task, single-chip microcomputer could whether superthreshold judges to this value, and for detection residual current essence, inherently there is randomness and sudden in electric leakage, if do not adopted interrupt mode, exist so electric leakage must be caught in real time.
Summary of the invention
The object of the invention is to solve the problem existing for prior art, find a kind of three-phase intelligent electric-energy meter based on Real-time Collection residual current technology, the residual current in three-phase electrical power system can be detected in real time, and passive for tradition investigation electric leakage mode is updated to active investigation mode, improve the real-time of investigation.
In order to realize object, the present invention is the three-phase intelligent electric-energy meter based on Real-time Collection residual current technology, comprise housing, described housing is provided with terminal block, residual current transformer, A phase line, B phase line, C phase line, zero line and the relay for control A phase line, B phase line, C phase line break-make is provided with in housing, A phase line, B phase line, C phase line, zero line are through residual current transformer, A phase line two ends, B phase line two ends, C phase line two ends, zero line two ends are connected with terminal block, also comprise:
Amplifier, the input end of amplifier is connected with the output terminal of residual current transformer, the output signal of residual current transformer is amplified;
Comparer, the input end of comparer is connected with the output terminal of amplifier, compares and exports compare result signal after the output signal of residual current transformer is amplified as input and the reference threshold preset;
Single-chip microcomputer, single-chip microcomputer comprises middle fracture, and the middle fracture of single-chip microcomputer is connected with the output terminal of comparer, and the output terminal of single-chip microcomputer connects the control line of relay, single-chip microcomputer according in the compare result signal output relay control signal of fracture reception.
Preferably, described relay comprises three contacts, described A phase line, B phase line, C phase line is respectively arranged a contact.Relay controls the break-make of corresponding A phase line, B phase line, C phase line by contact.
Preferably, after singlechip interruption mouth receives the compare result signal that comparer exports, the time of origin that the current leakage current of single-chip microcomputer record transfinites, leakage current value size, charge value this moment.By communication port copy reading or by time showing on the display apparatus or active reporting, also early warning can be carried out simultaneously.
Preferably, single-chip microcomputer is provided with PWM or timer output end mouth, comparer is provided with outside threshold reference value input port, PWM or timer output end mouth are connected with reference value input port, single-chip microcomputer passes through the threshold value of the pulse width modulation mode adjustment comparer of PWM or timer, thus regulates leakage current test threshold value.
Preferably, terminal block comprises the first connection terminal, the second connection terminal, the 3rd connection terminal, the 4th connection terminal, the 5th connection terminal, the 6th connection terminal, the 7th connection terminal and the 8th connection terminal, and one end of zero line is electrically connected with the 7th connection terminal; The other end of zero line is electrically connected with the 8th connection terminal; One end of A phase line is electrically connected with the first connection terminal, and the other end is electrically connected with the second connection terminal; One end of B phase line is electrically connected with the 3rd connection terminal, and the other end is electrically connected with the 4th connection terminal; One end of C phase line is electrically connected with the 5th connection terminal, and the other end is electrically connected with the 6th connection terminal.
Preferably, the 7th connection terminal and the 8th connection terminal mutually isolated.
Preferably, relay and residual current transformer integrative packaging.Optimize internal wiring structure, reduce Electrical Safety hidden danger, improve electricity consumption reliability.
Preferably, be provided with encapsulating shell in described housing, described relay and residual current transformer are arranged in encapsulating shell, and described encapsulating shell lower end is fixedly connected with sheet metal, and described encapsulating shell is fixed by sheet metal and terminal block.Realize the integrative packaging of relay and residual current transformer, optimize internal wiring structure, reduce Electrical Safety hidden danger, improve electricity consumption reliability, be connected with terminal block by sheet metal, easy for installation, sheet metal can be used as web member and A phase line, B phase line, C phase line or zero line is electrically connected with terminal block.
Preferably, the fixed part for fixing A phase line is provided with in described encapsulating shell, described fixed part comprises the upper slide slidably arranged up and down on the package and the lower skateboard slidably arranged up and down on the package, described lower skateboard is positioned at upper slide lower end, described upper slide upper end is provided with horizontally set upper mounted plate on the package, spring is provided with between fixed plate and upper slide, described upper spring upper end is fixedly connected with upper mounted plate, lower end is fixedly connected with upper slide, described lower skateboard lower end is provided with horizontally set bottom plate on the package, lower spring is provided with between described lower skateboard and bottom plate, described lower spring lower end is fixedly connected with bottom plate, upper end is connected with lower skateboard.Be convenient to fixing residual current transformer and A phase line.
Preferably, described upper slide is provided with the upper circuit fixing device for A phase line, described encapsulating shell is positioned at above upper slide to be located vertically to be fixed with the upper deflector apron corresponding with upper circuit fixing device position, described upper circuit fixing device comprises the upper straight rod be vertically fixed on upper slide, described upper straight rod is rotatably connected to upper thread jamming part away from that one end of upper slide, described upper thread jamming part comprise top from top to bottom towards the upper inclined portion of upper slide lopsidedness, the opening upper semi-circle arc Access Division forward of bottom, be rotationally connected with upper straight rod in the middle part of upper thread jamming part, upper inclined portion is semicircular arc towards that one end of upper deflector apron, described upper deflector apron is provided with upper gathering sill towards that side of upper circuit fixing device, described upper gathering sill anterior-posterior length is greater than the length of upper inclined portion, described upper gathering sill tilts from front to back obliquely, described upper gathering sill front position is positioned at above upper inclined portion,
Described lower skateboard is provided with the line stationary installation for fixing A phase line, described encapsulating shell is positioned at below lower skateboard to be located vertically to be fixed with the lower deflector apron corresponding with line stationary installation position, described line stationary installation comprises the lower straight-bar be vertically fixed on lower skateboard, described lower straight-bar is rotatably connected to lower card line portion away from that one end of lower skateboard, described lower card line portion comprises the portion that has a down dip of the slide plate lopsidedness that faces down from top to bottom of bottom, the opening lower half circle arc Access Division forward on top, be rotationally connected with lower straight-bar in the middle part of lower card line portion, that one end of deflector apron that faces down, the portion of having a down dip is semicircular arc, face down that side of circuit fixing device of described lower deflector apron is provided with lower gathering sill, described lower gathering sill anterior-posterior length is greater than the length in the portion of having a down dip, described lower gathering sill tilts from front to back obliquely, described lower gathering sill front position is positioned at below the portion of having a down dip.Phase line, zero line can be fixed by upper and lower circuit fixing device easily, prevent it from moving, be supplied to upper and lower slide plate acting force by upper and lower circuit fixing device, step up residual current transformer further.
Following Advantageous Effects can be obtained: Real-Time Monitoring residual current completely by implementing the present invention, early warning can be carried out to residual electricity flow valuve, record intelligent electric meter residual current event, and active reporting, be updated to active investigation mode by passive for tradition investigation electric leakage mode.Integrative installation technology, optimizes internal wiring structure, reduces Electrical Safety hidden danger, improves electricity consumption reliability.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the connection layout of residual current transformer, amplifier, comparer, 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;
The structural representation of fixed part when Fig. 5 is fixed part placement residual current transformer in the present invention.
Embodiment
For the ease of the understanding of those skilled in the art, below in conjunction with specific embodiment, the present invention is further illustrated:
As shown in FIG. 1 to 3, based on the three-phase intelligent electric-energy meter of Real-time Collection residual current technology, comprise housing 1, housing 1 is provided with terminal block 2, relay 3 and residual current transformer 4, A phase line 5, B phase line 6, C phase line 7 and zero line 8, A phase line 5, B phase line 6, C phase line 7, zero line 8 is provided with through residual current transformer 4 in housing 1, terminal block 2 comprises the first connection terminal 21, second connection terminal 22, the 3rd connection terminal 23, the 4th connection terminal 24, the 5th connection terminal 25, the 6th connection terminal 26, the 7th connection terminal 27 and the 8th connection terminal 28, one end (end of incoming cables) of A phase line 5 is electrically connected with the first connection terminal 21, and the other end (leading-out terminal) is electrically connected with the second connection terminal 22, one end (end of incoming cables) of B phase line 6 is electrically connected with the 3rd connection terminal 23, and the other end (leading-out terminal) is electrically connected with the 4th connection terminal 24, one end (end of incoming cables) of C phase line 7 is electrically connected with the 5th connection terminal 25, the other end (leading-out terminal) is electrically connected with the 6th connection terminal 26, one end (end of incoming cables) of zero line 8 is electrically connected with the 7th connection terminal 27, the other end (leading-out terminal) of zero line 8 is electrically connected with the 8th connection terminal 28, 7th connection terminal 27 and the 8th connection terminal 28 mutually isolated, relay 3 comprises three contacts 31, A phase line 5, B phase line 6, C phase line 7 is respectively arranged a contact 31, contact 31 is normally closed contact, can by the contact 31 control A phase line 5 of relay 3, B phase line 6, the break-make of C phase line 7, A phase line is provided with A phase current mutual inductor 11, B phase line is provided with B phase current mutual inductor 12, C phase line is provided with C phase current mutual inductor 13, three-phase intelligent electric-energy meter based on Real-time Collection residual current technology also comprises: amplifier, the input end of amplifier is connected with the output terminal 41 (output line) of residual current transformer 4, the output signal of residual current transformer 4 is amplified by amplifier, comparer, the input end of comparer is connected with the output terminal of amplifier, compare as input and the threshold value preset and export compare result signal after the output signal of residual current transformer is amplified, compare result signal comprises look-at-me and non-disruptive signal, single-chip microcomputer, single-chip microcomputer comprises middle fracture, the middle fracture of single-chip microcomputer is connected with the output terminal of comparer, the output terminal of single-chip microcomputer connects the control line 32 of relay 3, single-chip microcomputer according in the compare result signal output relay control signal that receives of fracture, relay 3 receives the break-make of control A phase line 5 after the control signal of single-chip microcomputer, B phase line 6, C phase line 7.
Single-chip microcomputer is provided with PWM or timer output end mouth, comparer is provided with outside threshold reference value input port, PWM or timer output end mouth are connected with reference value input port, and single-chip microcomputer passes through the threshold value of the pulse width modulation mode adjustment comparer of PWM or timer, thus regulates leakage current test threshold value.
The consumer of Electricity customers is when switch accesses, if the transformer leakage protector action of platform district can be caused when having electric leakage, after earth leakage protective device tripping, after a while can automatic closing again, the consumer leaked electricity in this process may would not access electrical network, again automatic closing success, which electricity consumer such unit-area management personnel cannot locate there is electrical leakage problems, also just cannot fix a breakdown at all, when leak electricity equipment again connecting system time, also again there will be earth leakage protective device action problem, so repeatedly, contradiction is caused between power supply enterprise and electricity consumer, cause certain economic loss and potential safety hazard.After adopting this programme, residual current transformer output signal is amplified by amplifier, the reference threshold comparison of the signal after amplification and comparer, in real time residual electricity flow valuve and the threshold value preset are compared, if residual electricity flow valuve does not exceed threshold value, then comparer exports non-disruptive signal, the disconnection of single-chip microcomputer not pilot relay contact; Once residual electricity flow valuve exceedes threshold value, comparer exports look-at-me to singlechip interruption interface, after single-chip microcomputer receives look-at-me, and real-time response process, and the disconnection of pilot relay contact; Also can according to inner setting, undertaken tripping by pilot relay or not trip operation, record the time of the generation that current leakage current transfinites simultaneously, residual electricity flow valuve and some correlation parameters this moment, the data of record by communication port copy reading or by time showing on the display apparatus or active reporting, also can carry out corresponding early warning operation, prompting has electric leakage to occur.When needing the threshold value adjusting comparer, issue corresponding threshold value by the communication port of intelligent electric meter, single-chip microcomputer regulates the pulsewidth of PWM/ timer according to the threshold value issued, thus changes reference voltage threshold.This programme can ensure maximum real-time, and not by computation chip passage, by special designs passage, once exceed threshold value, initiatively export corresponding look-at-me to single-chip microcomputer, single-chip microcomputer can process in real time, there is not the situation of leakage.
As shown in Figure 1, be provided with encapsulating shell 14 in housing, relay 3 and residual current transformer 4 are arranged in encapsulating shell 14, and encapsulating shell 14 lower end is fixedly connected with sheet metal 141, and encapsulating shell 14 is fixed by sheet metal 141 and terminal block 2.Realize relay 3 and the integrative packaging of residual current transformer 4, optimize internal wiring structure, reduce Electrical Safety hidden danger, improve electricity consumption reliability, be connected with terminal block 2 by sheet metal 141, easy for installation; Sheet metal 141 can be used as web member and A phase line, B phase line, C phase line or zero line is electrically connected with terminal block 2, for A phase line, the A phase line lower end of encapsulating shell 14 is fixed in sheet metal 141 one end, this sheet metal 141 other end is connected with the second connection terminal 22 in terminal block, and after connection, this sheet metal 141 can be used as a part for A phase line; In like manner, B phase line, C phase line, zero line also can be electrically connected with corresponding connection terminal by sheet metal.
As shown in Figure 3, in order to more convenient, the stable fixed relay 3 of energy and residual current transformer 4, relay 3 and residual current transformer 4 are all located in encapsulating shell
As shown in Fig. 3 ~ Fig. 5, in order to energy is more convenient, stable fixing residual current transformer and A phase line, the fixed part 9 of fixing A phase line 5 is provided with in encapsulating shell, fixed part comprises the upper slide 901 be slidably arranged on up and down on encapsulating shell 14 and the lower skateboard 902 be slidably arranged on up and down on encapsulating shell 14, lower skateboard 902 is positioned at upper slide 901 lower end, upper slide 901 upper end is provided with the upper mounted plate 903 be horizontally installed on encapsulating shell 14, spring 904 is provided with between upper mounted plate 903 and upper slide 901, upper spring 904 upper end is fixedly connected with upper mounted plate 903, lower end is fixedly connected with upper slide 901, lower skateboard 902 lower end is provided with the bottom plate 905 be horizontally installed on encapsulating shell 14, lower spring 906 is provided with between lower skateboard 902 and bottom plate 905, lower spring 906 lower end is fixedly connected with bottom plate 905, upper end is connected with lower skateboard 902.
As shown in Figure 4, upper slide 901 is provided with the upper circuit fixing device 91 for fixing A phase line, encapsulating shell 14 is positioned at above upper slide 901 to be located vertically to be fixed with the upper deflector apron 92 corresponding with upper circuit fixing device 91 position, upper circuit fixing device 91 comprises the upper straight rod 911 be vertically fixed on upper slide 901, upper straight rod 911 is rotatably connected to upper thread jamming part 912 away from that one end of upper slide 901, upper thread jamming part 912 comprise top from top to bottom towards the upper inclined portion 9121 of upper slide 901 lopsidedness, the opening upper semi-circle arc Access Division 9122 forward of bottom, be rotationally connected with upper straight rod 911 in the middle part of upper thread jamming part, upper inclined portion 9121 is semicircular arc towards upper that one end of deflector apron 92, upper deflector apron 92 is provided with upper gathering sill 921 towards that side of upper circuit fixing device 91, upper gathering sill 921 anterior-posterior length is greater than the length of upper inclined portion 9121, upper gathering sill 921 tilts from front to back obliquely, upper gathering sill 921 front position is positioned at above upper inclined portion 9121.
As shown in Figure 4, lower skateboard 902 two ends are equipped with the line stationary installation 93 for A phase line, encapsulating shell 14 is positioned at below lower skateboard 902 to be located vertically to be fixed with the lower deflector apron 94 corresponding with line stationary installation 93 position, line stationary installation 93 comprises the lower straight-bar 931 be vertically fixed on lower skateboard 902, lower straight-bar 931 is rotatably connected to lower card line portion 932 away from that one end of lower skateboard 902, lower card line portion 932 comprises the portion that has a down dip 9321 of slide plate 902 lopsidedness that faces down from top to bottom of bottom, the opening lower half circle arc Access Division 9322 forward on top, be rotationally connected with lower straight-bar 931 in the middle part of lower card line portion, that one end of deflector apron 94 that faces down, portion 9321 that has a down dip is semicircular arc, face down that side of circuit fixing device 93 of lower deflector apron 94 is provided with lower gathering sill 941, lower gathering sill 941 anterior-posterior length is greater than the length in the portion of having a down dip 9321, lower gathering sill 941 tilts from front to back obliquely, lower gathering sill 941 front position is positioned at below the portion of having a down dip 9321.
As shown in Figure 4, under original state, distance between upper slide 901 and lower skateboard 902 is less than the thickness of residual current transformer, first A phase line is placed on corresponding upper semi-circle arc Access Division 9122 and lower half circle arc Access Division 9322, by upper slide 901 upward sliding, by lower skateboard 902 slide downward, then residual current transformer 7 is inserted between upper slide 901 and lower skateboard 902, upper spring 904 pairs of upper slides 901 have downward elastic force, lower spring 906 pairs of lower skateboards 902 have elastic force upwards, thus step up residual current transformer, in order to better fix residual current transformer, upper slide 901 lower end and lower skateboard 902 upper end are equipped with rubber blanket, upper slide 901 upper surface two ends are provided with downward extension, lower skateboard 902 lower surface two ends are provided with extension upwards, by extension, residual current transformer two ends are stepped up, now, as shown in Figure 5, under the effect of upper inclined portion 9121 because of upper gathering sill 921, upper inclined portion 9121 is rotated to orientation substrate, and then drive upper semi-circle arc Access Division 9122 to rotate, upper semi-circle arc Access Division 9122 is near upper deflector apron 92, to be coordinated with upper semi-circle arc Access Division 9122 by upper deflector apron 92 and A phase line 3 is clamped, during clamping A phase line, upper straight rod 911 cannot move up, and be subject to the downward acting force of thread jamming part 912, and then upper straight rod 911 pairs of upper slides 901 apply downward acting force, in like manner lower skateboard 902 is subject to lower straight-bar 931 to its acting force upwards, and then improve upper slide 901 and lower skateboard 902 pairs of residual current transformers step up effect, A phase line is also fixed by lower card line portion 932 simultaneously, and, if do not take out residual current transformer, lower card line portion 932 and upper thread jamming part 912 all cannot rotate, A live wire is fixed by upper circuit fixing device 91 and line stationary installation 93, and when taking out residual current transformer, upper slide 901 is subject to the acting force slide downward of spring, lower skateboard 902 is subject to the acting force upward sliding of spring, now lower card line portion 932 and upper thread jamming part 912 all rotatable, directly A phase line can be pulled out, operation is very easy, zero line and phase line fixing-stable, improve the Detection results of residual current transformer.
In like manner can arrange the fixed part for fixing B phase, C phase, zero line, its structure is identical with the fixing part structure for fixing A phase line.
The present invention can detect the residual current in three-phase electrical power system in real time; increase intelligent electric meter residual current logout and active reporting function; solve residual current operated protective device and can only carry out trip protection when residual current transfinites fault; the problem of early warning and Real-Time Monitoring cannot be carried out, and passive for tradition investigation electric leakage mode is updated to active investigation mode.
These are only specific embodiments of the invention, but technical characteristic of the present invention is not limited thereto, any those skilled in the art is in the field of the invention, and the change done or modification are all encompassed among the scope of the claims of the present invention.
Claims (10)
1. based on the three-phase intelligent electric-energy meter of Real-time Collection residual current technology, comprise housing, it is characterized in that, described housing is provided with terminal block, residual current transformer, A phase line, B phase line, C phase line, zero line and the relay for control A phase line, B phase line, C phase line break-make is provided with in housing, A phase line two ends, B phase line two ends, C phase line two ends, zero line two ends are connected with terminal block, and A phase line, B phase line, C phase line, zero line, through residual current transformer, also comprise:
Amplifier, the input end of described amplifier is connected with the output terminal of residual current transformer, the output signal of residual current transformer is amplified;
Comparer, the input end of described comparer is connected with the output terminal of amplifier, compares and exports compare result signal after the output signal of residual current transformer is amplified as input and the reference threshold preset;
Single-chip microcomputer, described single-chip microcomputer comprises middle fracture, and the middle fracture of single-chip microcomputer is connected with the output terminal of comparer, and the output terminal of single-chip microcomputer connects the control line of relay, single-chip microcomputer according in the compare result signal output relay control signal of fracture reception.
2., as claimed in claim 1 based on the three-phase intelligent electric-energy meter of Real-time Collection residual current technology, it is characterized in that: described relay comprises three contacts, described A phase line, B phase line, C phase line are respectively arranged a contact.
3. as claimed in claim 1 based on the three-phase intelligent electric-energy meter of Real-time Collection residual current technology, it is characterized in that: after singlechip interruption mouth receives the compare result signal that comparer exports, the time of origin that the current leakage current of single-chip microcomputer record transfinites, leakage current value size, charge value this moment.
4. as claimed in claim 1 based on the three-phase intelligent electric-energy meter of Real-time Collection residual current technology, it is characterized in that: described single-chip microcomputer is provided with PWM or timer output end mouth, described comparer is provided with outside threshold reference value input port, PWM or timer output end mouth are connected with reference value input port, described single-chip microcomputer passes through the threshold value of the pulse width modulation mode adjustment comparer of PWM or timer, thus regulates leakage current test threshold value.
5. as claimed in claim 1 based on the three-phase intelligent electric-energy meter of Real-time Collection residual current technology, it is characterized in that: described terminal block comprises the first connection terminal, the second connection terminal, the 3rd connection terminal, the 4th connection terminal, the 5th connection terminal, the 6th connection terminal, the 7th connection terminal and the 8th connection terminal, one end of zero line is electrically connected with the 7th connection terminal; The other end of zero line is electrically connected with the 8th connection terminal; One end of A phase line is electrically connected with the first connection terminal, and the other end is electrically connected with the second connection terminal; One end of B phase line is electrically connected with the 3rd connection terminal, and the other end is electrically connected with the 4th connection terminal; One end of C phase line is electrically connected with the 5th connection terminal, and the other end is electrically connected with the 6th connection terminal.
6., as claimed in claim 5 based on the three-phase intelligent electric-energy meter of Real-time Collection residual current technology, it is characterized in that: the 7th connection terminal and the 8th connection terminal mutually isolated.
7., as claimed in claim 1 based on the three-phase intelligent electric-energy meter of Real-time Collection residual current technology, it is characterized in that: relay and residual current transformer integrative packaging.
8. as claimed in claim 1 based on the single-phase intelligent electric energy meter of Real-time Collection residual current technology, it is characterized in that: in described housing, be provided with encapsulating shell, described relay and residual current transformer are arranged in encapsulating shell, described encapsulating shell lower end is fixedly connected with sheet metal, and described encapsulating shell is fixed by sheet metal and terminal block.
9. as claimed in claim 8 based on the three-phase intelligent electric-energy meter of Real-time Collection residual current technology, it is characterized in that: in described encapsulating shell, in the middle part of front surface, be provided with the fixed part for fixing A phase line, described fixed part comprises the upper slide slidably arranged up and down on the package and the lower skateboard slidably arranged up and down on the package, described lower skateboard is positioned at upper slide lower end, described upper slide upper end is provided with horizontally set upper mounted plate on the package, spring is provided with between fixed plate and upper slide, described upper spring upper end is fixedly connected with upper mounted plate, lower end is fixedly connected with upper slide, described lower skateboard lower end is provided with horizontally set bottom plate on the package, lower spring is provided with between described lower skateboard and bottom plate, described lower spring lower end is fixedly connected with bottom plate, upper end is connected with lower skateboard.
10. as claimed in claim 9 based on the three-phase intelligent electric-energy meter of Real-time Collection residual current technology, it is characterized in that: described upper slide is provided with the upper circuit fixing device for A phase line, described encapsulating shell is positioned at above upper slide to be located vertically to be fixed with the upper deflector apron corresponding with upper circuit fixing device position, described upper circuit fixing device comprises the upper straight rod be vertically fixed on upper slide, described upper straight rod is rotatably connected to upper thread jamming part away from that one end of upper slide, described upper thread jamming part comprise top from top to bottom towards the upper inclined portion of upper slide lopsidedness, the opening upper semi-circle arc Access Division forward of bottom, be rotationally connected with upper straight rod in the middle part of upper thread jamming part, upper inclined portion is semicircular arc towards that one end of upper deflector apron, described upper deflector apron is provided with upper gathering sill towards that side of upper circuit fixing device, described upper gathering sill anterior-posterior length is greater than the length of upper inclined portion, described upper gathering sill tilts from front to back obliquely, described upper gathering sill front position is positioned at above upper inclined portion,
Described lower skateboard is provided with the line stationary installation for fixing A phase line, described encapsulating shell is positioned at below lower skateboard to be located vertically to be fixed with the lower deflector apron corresponding with line stationary installation position, described line stationary installation comprises the lower straight-bar be vertically fixed on lower skateboard, described lower straight-bar is rotatably connected to lower card line portion away from that one end of lower skateboard, described lower card line portion comprises the portion that has a down dip of the slide plate lopsidedness that faces down from top to bottom of bottom, the opening lower half circle arc Access Division forward on top, be rotationally connected with lower straight-bar in the middle part of lower card line portion, that one end of deflector apron that faces down, the portion of having a down dip is semicircular arc, face down that side of circuit fixing device of described lower deflector apron is provided with lower gathering sill, described lower gathering sill anterior-posterior length is greater than the length in the portion of having a down dip, described lower gathering sill tilts from front to back obliquely, described lower gathering sill front position is positioned at below the portion of having a down dip.
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 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711348802.1A Division CN108037333B (en) | 2015-11-27 | 2015-11-27 | Three-phase intelligent electric energy meter with adjustable residual current threshold value |
| CN201711350578.XA Division CN108254599B (en) | 2015-11-27 | 2015-11-27 | Three-phase intelligent electric energy meter structure for collecting residual current |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105424998A true CN105424998A (en) | 2016-03-23 |
| CN105424998B CN105424998B (en) | 2018-03-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510851375.3A Active CN105424998B (en) | 2015-11-27 | 2015-11-27 | Three-phase intelligent electric-energy meter based on real-time collection residual current technology |
| CN201711348802.1A Active CN108037333B (en) | 2015-11-27 | 2015-11-27 | Three-phase intelligent electric energy meter with adjustable residual current threshold value |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106443101A (en) * | 2016-08-29 | 2017-02-22 | 王月园 | Three-phase electric energy meter |
| CN111693769A (en) * | 2019-03-15 | 2020-09-22 | 宁波三星智能电气有限公司 | Electric energy meter |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| 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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Also Published As
| Publication number | Publication date |
|---|---|
| CN105424998B (en) | 2018-03-16 |
| CN108254599A (en) | 2018-07-06 |
| CN108037333B (en) | 2020-12-11 |
| CN108254599B (en) | 2020-12-18 |
| CN108037333A (en) | 2018-05-15 |
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