CN110389254A - A kind of metering device and end metering device of single-phase electrical parameter - Google Patents
A kind of metering device and end metering device of single-phase electrical parameter Download PDFInfo
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- CN110389254A CN110389254A CN201910647826.XA CN201910647826A CN110389254A CN 110389254 A CN110389254 A CN 110389254A CN 201910647826 A CN201910647826 A CN 201910647826A CN 110389254 A CN110389254 A CN 110389254A
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- 238000005070 sampling Methods 0.000 claims abstract description 25
- 239000000956 alloy Substances 0.000 claims abstract description 19
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 19
- 238000004804 winding Methods 0.000 claims abstract description 8
- 239000004020 conductor Substances 0.000 claims description 21
- 230000005611 electricity Effects 0.000 claims description 14
- 238000004891 communication Methods 0.000 claims description 11
- 238000001514 detection method Methods 0.000 claims description 11
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 10
- 229910052802 copper Inorganic materials 0.000 description 10
- 239000010949 copper Substances 0.000 description 10
- 238000009434 installation Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000004907 flux Effects 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- HEZMWWAKWCSUCB-PHDIDXHHSA-N (3R,4R)-3,4-dihydroxycyclohexa-1,5-diene-1-carboxylic acid Chemical compound O[C@@H]1C=CC(C(O)=O)=C[C@H]1O HEZMWWAKWCSUCB-PHDIDXHHSA-N 0.000 description 1
- 241000208340 Araliaceae Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
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- 230000000630 rising effect Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
Abstract
The present invention provides a kind of metering devices of single-phase electrical parameter, including processor, power module and electrical parameter sampling module；The processor is electrically connected with the power module, the electrical parameter sampling module respectively；The electrical parameter sampling module includes transformer current sample circuit；The mutual inductor of the transformer current sample circuit includes the skeleton that at least two inside are cavity, and spacing is equipped between the skeleton and is connected by alloy sheet, and winding is equipped on each skeleton, and the winding and the alloy sheet constitute closed magnetic loop.The metering device and end metering device of a kind of single-phase electrical parameter provided by the invention, on the basis of meeting electric quantity metering requirement, optimize mutual inductor structure to reduce the volume of mutual inductor, to keep the internal structure of electric quantity metering device more compact, and then realizes electric quantity metering device miniaturization.
Description
Technical field
The present invention relates to electric quantity metering technical fields, metering device and end meter more particularly, to a kind of single-phase electrical parameter
Measure device.
Background technique
With development of modern industry, electricity consumption constantly increases, and the associated appliance of power monitoring also constantly upgrades, for adopting
Collection, the ammeter for monitoring electrical parameter are widely used in SCADA system and energy efficiency management system.Currently, existing be mounted on distribution
The ammeter of case end generally uses guide tracked mounting means, is carried out data transmission by wired connection mode；For electrical parameter
Measurement, using voltage measuring transformer voltage, and utilize current transformer or copper-manganese electrical resistance collection current parameters.But
It is, due to complicated AC/DC power supply electricity in the structure design and ammeter of the large scale power frequency mutual inductor inside ammeter
Road causes ammeter volume big, occupies more distribution box space.
Summary of the invention
The present invention provides a kind of metering device of single-phase electrical parameter and end metering devices, are meeting electric quantity metering requirement
On the basis of, optimize mutual inductor structure to reduce the volume of mutual inductor, thus keep the internal structure of electric quantity metering device more compact,
To realize that electric quantity metering device minimizes, and then less occupy distribution box space.The technical solution is as follows:
The present invention provides a kind of metering devices of single-phase electrical parameter, including processor, power module and electrical parameter to adopt
Egf block；
The processor is electrically connected with the power module, the electrical parameter sampling module respectively；
The electrical parameter sampling module includes transformer current sample circuit；
The mutual inductor of the transformer current sample circuit include at least two inside be cavity skeleton, the skeleton it
Between be equipped with and spacing and be connected by alloy sheet, winding is equipped on each skeleton, the winding and the alloy sheet are constituted
Closed magnetic loop.
Preferably, the skeleton and the alloy sheet are set as two, the both ends difference of one of them skeleton
It is connected by an alloy sheet with the both ends of skeleton described in another, forms cricoid mutual inductor.
Preferably, the metering device of the single-phase electrical parameter, further includes shell, and the shell is equipped with through described
The through-hole of the metering device of single-phase electrical parameter；The processor, the power module and the electrical parameter sampling module all positions
In in the shell.
Preferably, the metering device of the single-phase electrical parameter further includes the conductor for being powered with external power supply
Connector, the conductor adapting piece are stretched over except the shell by passing through the through-hole in the shell.
Preferably, further include circuit board in the shell, the circuit board be equipped with through the circuit board surface and
The perforation and the circuit board being connected to the through-hole of the shell are electrically connected with the conductor adapting piece；
The processor, the power module and the electrical parameter sampling module are set to the circuit board, Yi Jisuo
Circuit board is stated equipped with the connecting pin for connecting with the mutual inductor.
Preferably, the power module is resistance-capacitance depressurization power circuit and the processor is the micro- place of low-power consumption
Manage device.
Preferably, the electrical parameter sampling module includes electric resistance partial pressure sample circuit.
Preferably, the metering device of the single-phase electrical parameter, further includes power-fail detection circuit, the detection of power loss
The input terminal of circuit is connect with the power output end of the power module, the output end of the power-fail detection circuit and the processing
The power input of device connects.
Preferably, the metering device of the single-phase electrical parameter, further includes radio communication circuit, the wireless communication
Circuit is connect with the communication ends of the processor.
The present invention provides a kind of end metering devices of single-phase electrical parameter, comprising: air switch, electric wire and institute as above
The metering device for the single-phase electrical parameter stated；
The conductor adapting piece of the metering device of the single-phase electrical parameter is inserted into the plug wire hole of the air switch so that described
The metering device of single-phase electrical parameter is connect with the air switch；
The electric wire passes through the metering device of the single-phase electrical parameter, is inserted into the plug wire hole of the air switch.
Compared with the prior art, the embodiment of the present invention has the following beneficial effects:
The present invention provides a kind of metering device of single-phase electrical parameter, samples mould by processor, power module and electrical parameter
Block assembles, wherein and input current is sampled using mutual inductance current sample mode, and measures related electrical parameters, including
Current effective value etc., achieve the effect that precisely, efficiently measure electrical parameter.In order to avoid traditional transformer current sample mode
The disadvantage that mutual inductor volume causes greatly metering device volume larger, the metering device of the single-phase electrical parameter provided by the invention
Mutual inductor, since alloy sheet is connected on skeleton, and the inside of skeleton is cavity, plays the role of air magnetic core, has compared biography
The magnetic core of system is smaller, thus reduce the overall volume of the mutual inductor, and the magnetic conductivity in the mutual inductor is lower, magnetic flux
It is not easy to reach saturation point, to keep its measurement range bigger than traditional current transformer；In addition, magnetic core has been compared, alloy sheet
Not only occupied space is smaller, and is conducive to enhance the magnetic flux of air in cavity, so that the output of low current signal is enhanced,
The precision of low current signal is improved, and then improves measuring accuracy.
The present invention provides a kind of end metering device of single-phase electrical parameter, is joined by air switch, electric wire and above-mentioned single-phase electricity
Several metering devices assemble, since the metering device of the single-phase electrical parameter is directly mounted on the binding post of air switch
Electricity is taken, the electric wire of test line passes through the metering device, thus quickly and easily measure, monitor electrical parameter, simultaneously as
The metering device is directly mounted at air switch, without occupying the installation site in distribution box, to save distribution box
Space.
Detailed description of the invention
Fig. 1 is the functional block diagram of the metering device of the single-phase electrical parameter of one of embodiment of the present invention；
Fig. 2 is the structure chart of the mutual inductor of the metering device of the single-phase electrical parameter of one of embodiment of the present invention；
Fig. 3 is the flow chart of the power failure detection method of the metering device of the single-phase electrical parameter of one of embodiment of the present invention；
Fig. 4 is the structure chart of the metering device of the single-phase electrical parameter of one of embodiment of the present invention；
Fig. 5 is that the structure of the metering device of the single-phase electrical parameter of one of embodiment of the present invention splits schematic diagram；
Fig. 6 is the schematic diagram of the installation method of the metering device of the single-phase electrical parameter of one of embodiment of the present invention；
Fig. 7 is the principle of the electrical parameter metering method of the metering device of the single-phase electrical parameter of one of embodiment of the present invention
Figure；
Wherein, 100, mutual inductor；101, skeleton；102, alloy sheet；103, winding；200, shell；201, through-hole；202, refer to
Show lamp；301, upper plate；302, lower plate；401, conductor plate；402, copper plug.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Referring to Figure 1, it illustrates a kind of metering devices of single-phase electrical parameter of exemplary embodiment of the present invention, including
Processor, power module and electrical parameter sampling module；
The processor is electrically connected with the power module and the processor is electrically connected with the electrical parameter sampling module
It connects；
The electrical parameter sampling module includes transformer current sample circuit；
The mutual inductor 100 of the transformer current sample circuit includes the skeleton 101 that at least two inside are cavity, described
Be equipped with spacing between skeleton 101 and be connected by alloy sheet 102, be equipped with winding 103 on each skeleton 101, it is described around
Group 103 constitutes closed magnetic loop with the alloy sheet 102.
The embodiment of the present invention provides a kind of metering device of single-phase electrical parameter, by processor, power module and electrical parameter
Sampling module assembles, wherein is sampled using mutual inductance current sample mode to input current, and measures mutually powered-down ginseng
Number, including current effective value etc., achieve the effect that precisely, efficiently measure electrical parameter.In order to avoid traditional transformer current is adopted
The disadvantage that the mutual inductor volume of sample loading mode causes greatly metering device volume larger, the meter of the single-phase electrical parameter provided by the invention
The mutual inductor for measuring device, since alloy sheet is connected on skeleton, and the inside of skeleton is cavity, plays the role of air magnetic core,
Compared to rising, traditional magnetic core is smaller, to reduce the overall volume of the mutual inductor, and the magnetic conductivity in the mutual inductor compared with
Low, magnetic flux is not easy to reach saturation point, to keep its measurement range bigger than traditional current transformer；In addition, comparing magnetize
Core, not only occupied space is smaller for alloy sheet, and is conducive to enhance the magnetic flux of air in cavity, to enhance low current letter
Number output, improve the precision of low current signal, and then improve measuring accuracy.
Fig. 2 is referred to, it illustrates a kind of the mutual of the metering device of single-phase electrical parameter of exemplary embodiment of the present invention
Sensor 100, the skeleton 101 and the alloy sheet 102 are set as two, and the both ends of one of them skeleton 101 lead to respectively
It crosses the alloy sheet 102 to be connected with the both ends of skeleton 101 described in another, forms cricoid mutual inductor 100.
When measuring electrical parameter, electric wire passes through the mutual inductor 100 inside the metering device of the single-phase electrical parameter, so that mutual inductance
Device 100 generates induced current, so that the electrical parameter sampling module be made to acquire faradic relevant parameter, the electrical parameter is adopted
Egf block will acquire the resulting data of induced current and be transferred to the processor processing, to realize electrical parameter metering.
The power module includes rectification circuit, voltage regulator circuit and direct-current voltage reducing circuit；
The input terminal of the voltage regulator circuit is connect with the output end of the rectification circuit, the output end of the voltage regulator circuit with
The input terminal of the direct-current voltage reducing circuit connects and the power supply of the output end and the processor of the direct-current voltage reducing circuit is defeated
Enter end connection.
In order to further decrease volume, the power module is the power circuit using resistance-capacitance depressurization mode, the processing
Device is low-power microprocessor；Preferably, the processor is the msp430i2041 low-power microprocessor (MCU) of TI.
It is understood that, using resistance-capacitance depressurization mode, this power source design can only provide small electricity in order to reduce power module
Stream power supply, it is therefore, whole to carry out low power dissipation design, the msp430i2041 low-power microprocessor of TI is selected in main devices
(MCU) it carries out data acquisition, calculate, built-in 24 bit synchronization AD Acquisition Circuit of amplifier and 4 channel meets adopting for electrical parameter
Collection calculates.
In the present embodiment, electric main 230V is inputted, and by obtaining direct current after resistance-capacitance depressurization, rectification, passes through pressure stabilizing
The burning voltage of 47V is obtained after device, then by DCDC power supply, the voltage of 47V is converted into the 3.3V supply voltage of system.
In order to further decrease volume, the electrical parameter sampling module includes the voltage sample electricity using electric resistance partial pressure mode
Road.
It is understood that use electric resistance partial pressure in order to reduce the volume of electrical parameter sampling module and carry out voltage measurement,
Obtained voltage is divided to be acquired by the AD inside MCU.
In the present embodiment, the electrical parameter sampling module includes that 100 current sampling circuit of mutual inductor and electric resistance partial pressure are adopted
Sample circuit；The input terminal of 100 current sampling circuit of mutual inductor is connected with current source, output end and the processor
The connection of current acquisition signal end；The input terminal of the electric resistance partial pressure sample circuit is connect with voltage source, output end and the place
Manage the voltage acquisition signal end connection of device.
The metering device of the single-phase electrical parameter, further includes power-fail detection circuit, the input terminal of the power-fail detection circuit
It is connect with the power output end of the power module, the power input of the output end of the power-fail detection circuit and the processor
End connection.
Refer to Fig. 3, in terms of the storage on, since using the memory inside MCU, erasing times are limited, in order to keep away
Exempt from frequent data write-in, therefore saving in power down moment for electric degree value, increases power-fail detection circuit, using electric resistance partial pressure
Principle detects voltage after front end 47V pressure stabilizing, and under normal circumstances, the voltage fluctuation of 47V is not less than 46V, therefore, branch pressure voltage
When value is lower than 40V voltage, MCU interruption is triggered, carries out data preservation, is conducive to the data for protecting electrical parameter metering device, avoids counting
According to unexpected loss.
The metering device of the single-phase electrical parameter, further includes radio communication circuit, the radio communication circuit and the place
Manage the communication ends connection of device.
It is understood that the metering device of the single-phase electrical parameter is installed concentratedly in distribution box, in order to avoid voltage,
The wiring of electric current and communication bus is inconvenient, using communication, is not necessarily to additional wiring, avoids installing in distribution box
A large amount of electric wires, to further save the space in distribution box.
Fig. 4 is referred to, it illustrates a kind of metering devices of single-phase electrical parameter of exemplary embodiment of the present invention, also wrap
Shell 200 is included, the shell 200 is equipped with the through-hole 201 of the metering device through the single-phase electrical parameter；The processor, institute
It states power module and the electrical parameter sampling module is built in the shell 200；
Preferably, the shell 200 is equipped with indicator light 202, and the indicator light 202 is electrically connected with the processor.
Preferably, the metering device of the single-phase electrical parameter further include for being connected with external power source conductor adapting piece,
The conductor adapting piece is stretched over except the shell 200 by passing through the through-hole 201 in the shell 200；Preferably, described
Conductor adapting piece is copper plug 402, and the metering device of the single-phase electrical parameter is electrically connected by the copper plug 402 with external power supply
It connects.
The through-hole 201 includes first through hole 201 and the second through-hole 201；
Shell 200 is removable to be divided into the first shell 200, second housing 200；
When measuring electrical parameter, wherein electric wire runs through the metering device of the single-phase electrical parameter by the first through hole 201,
Another electric wire runs through the metering device of the single-phase electrical parameter by second through-hole 201；The copper plug 402 with pass through
Connecting terminal on the line contacts of the metering device of the single-phase electrical parameter and the air switch by being coupled links together.
It preferably, include for realizing the circuit of electrical parameter metering function inside the metering device of the single-phase electrical parameter
Plate, the circuit board are equipped with the perforation for running through the circuit board surface and being connected to the through-hole 201 of the shell 200, and described
Circuit board is electrically connected with the conductor adapting piece (preferably copper plug)；
The processor, the power module and the electrical parameter sampling module are set to the circuit board, Yi Jisuo
Circuit board is stated equipped with the connecting pin for connecting with the mutual inductor 100.
It is understood that the electric wire passes through when electric wire enters the inside of the shell by a through-hole
Cricoid mutual inductor, while the electric wire passes through the perforation of the circuit board and by another through-hole of the shell from described
Shell is pierced by.
Fig. 5 is referred to, it is described it illustrates a kind of metering device of single-phase electrical parameter of exemplary embodiment of the present invention
It include two pieces of circuit boards inside the metering device of single-phase electrical parameter, two pieces of circuit boards are to be equipped with through the circuit board
The upper plate 301 and lower plate 302 of face and the perforation being connected to the through-hole 201 of the shell 200, the upper plate 301 and the lower plate
302 electrical connections；
Preferably, the upper plate 301 is connect with the lower plate 302 using row's needle connection type；
The upper plate 301 is equipped with the connecting pin for connecting with the mutual inductor 100, the processor, the power supply mould
Block and the electrical parameter sampling module are set to the lower plate 302；
The mutual inductor 100 is between the upper plate 301 and the lower plate 302, and the ring-type of the mutual inductor 100 is logical
Hole 201 is communicated with the perforation of the upper plate 301 and the lower plate 302.
The lower plate 302 is connect with the conductor adapting piece takes electricity, while can measure voltage.
Preferably, the connecting pin is pad, and the mutual inductor 100 is welded to the pad by conductor, to realize electricity
Connection.
It preferably, further include conductor plate 401 in the shell 200, the conductor plate 401 is equipped with and passes through for supply lines
Perforation, the conductor plate 401 is electrically connected by the copper plug 402 and the power supply outside the metering device of the single-phase electrical parameter
It connects；
The conductor plate 401 is equipped with contact flat spring and is electrically connected by the contact flat spring with the lower plate 302.
Preferably, the conductor plate 401 is copper sheet.
Wherein an electric wire passes through the through-hole 201 of the shell 200 to electric wire one by one, the upper plate 301 is worn during installation
Hole, the mutual inductor 100, the perforation of the lower plate 302, the shell 200 through-hole 201, thus pass through the single-phase electricity join
Several metering devices；Another electric wire passes through the perforation, described of the through-hole 201 of the shell 200, the conductor plate 401 one by one
The through-hole 201 of shell 200.
The exemplary embodiment of the present invention provides a kind of end metering devices of single-phase electrical parameter, comprising: air switch, electricity
The metering device of line and single-phase electrical parameter as described above；
The copper plug 402 of the metering device of the single-phase electrical parameter is inserted into the plug wire hole of the air switch so that the list
The metering device of phase electrical parameter is connect with the air switch, and the shell of the metering device of the single-phase electrical parameter is inserted with described
One end of string holes is bonded；
The electric wire passes through the single-phase electrical parameter from the through-hole on the shell of the metering device of the single-phase electrical parameter
Metering device and the plug wire hole for being inserted into the air switch.
Fig. 6 is referred to, it illustrates a kind of end metering devices of single-phase electrical parameter of exemplary embodiment of the present invention
Installation method, the metering device of above-described single-phase electrical parameter is installed to air switch, step includes:
S101, the plug wire hole that the copper plug 402 of the metering device of the single-phase electrical parameter is inserted into air switch；
S102, electric wire is passed through from the through-hole 201 of the metering device of the single-phase electrical parameter and is inserted into the plug wire hole；
S103, the screw of the air switch is tightened with the electric wire and copper plug 402 in the fixation plug wire hole.
The embodiment of the present invention provides a kind of end metering device of single-phase electrical parameter, by air switch, electric wire and above-mentioned list
The metering device of phase electrical parameter assembles, since the metering device of the single-phase electrical parameter is directly mounted at connecing for air switch
Electricity is taken on terminal, the electric wire of test line passes through the metering device, to quickly and easily measure, monitor electrical parameter, together
When, since the metering device is directly mounted at air switch, without occupying the installation site in distribution box, match to save
The space of electronic box.
Fig. 7 is referred to, it illustrates a kind of electricity of the metering device of single-phase electrical parameter of exemplary embodiment of the present invention
Parameter metering method carries out electrical parameter metering, specific steps using the metering device of above-described single-phase electrical parameter are as follows:
The electric current by mutual inductor 100 sample using electrical parameter acquisition module while input voltage is adopted
Sample；
Sampled value is transported to processor to carry out the metering operation of electrical parameter；
Export electrical parameter metering value.
Wherein, the electrical parameter metering value includes voltage effective value, current effective value, active power, reactive power, electric degree
Value etc..
The above is a preferred embodiment of the present invention, it is noted that for those skilled in the art
For, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also considered as
Protection scope of the present invention.
Claims (10)
1. a kind of metering device of single-phase electrical parameter, which is characterized in that sample mould including processor, power module and electrical parameter
Block；
The processor is electrically connected with the power module, the electrical parameter sampling module respectively；
The electrical parameter sampling module includes transformer current sample circuit；
The mutual inductor of the transformer current sample circuit includes the skeleton that at least two inside are cavity, is set between the skeleton
There is spacing and be connected by alloy sheet, winding is equipped on each skeleton, the winding and the alloy sheet, which are constituted, to be closed
Magnetic loop.
2. the metering device of single-phase electrical parameter as described in claim 1, which is characterized in that the skeleton and the alloy sheet are equal
Two are set as, the both ends of one of them skeleton pass through the both ends phase of the alloy sheet with skeleton described in another respectively
Connection, forms cricoid mutual inductor.
3. the metering device of single-phase electrical parameter as claimed in claim 2, which is characterized in that further include shell, the shell is set
There is the through-hole of the metering device through the single-phase electrical parameter；The processor, the power module and the electrical parameter are adopted
Egf block is all located in the shell.
4. the metering device of single-phase electrical parameter as claimed in claim 3, which is characterized in that further include for logical with external power supply
The conductor adapting piece of electricity, the conductor adapting piece are stretched over except the shell by passing through the through-hole in the shell.
5. the metering device of single-phase electrical parameter as claimed in claim 4, which is characterized in that further include circuit in the shell
Plate, the circuit board are equipped with through the circuit board surface and the perforation being connected to the through-hole of the shell and the circuit
Plate is electrically connected with the conductor adapting piece；
The processor, the power module and the electrical parameter sampling module are set to the circuit board and the electricity
Road plate is equipped with the connecting pin for connecting with the mutual inductor.
6. the metering device of single-phase electrical parameter as claimed in claim 5, which is characterized in that the power module is resistance-capacitance depressurization
Power circuit and the processor are low-power microprocessor.
7. the metering device of single-phase electrical parameter as claimed in claim 5, which is characterized in that the electrical parameter sampling module includes
Electric resistance partial pressure sample circuit.
8. the metering device of single-phase electrical parameter as claimed in claim 5, which is characterized in that it further include power-fail detection circuit, institute
The input terminal for stating power-fail detection circuit is connect with the power output end of the power module, the output end of the power-fail detection circuit
It is connect with the power input of the processor.
9. the metering device of single-phase electrical parameter as claimed in claim 5, which is characterized in that it further include radio communication circuit, institute
Radio communication circuit is stated to connect with the communication ends of the processor.
10. a kind of end metering device of single-phase electrical parameter characterized by comprising air switch, electric wire and as right is wanted
Seek the metering device of 5 to 9 described in any item single-phase electrical parameters；
The conductor adapting piece of the metering device of the single-phase electrical parameter is inserted into the plug wire hole of the air switch so that described single-phase
The metering device of electrical parameter is connect with the air switch；
The electric wire passes through the metering device of the single-phase electrical parameter, is inserted into the plug wire hole of the air switch.
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| CN201910647826.XA CN110389254A (en) | 2019-07-16 | 2019-07-16 | A kind of metering device and end metering device of single-phase electrical parameter |
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| CN201910647826.XA CN110389254A (en) | 2019-07-16 | 2019-07-16 | A kind of metering device and end metering device of single-phase electrical parameter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110389253A (en) * | 2019-07-16 | 2019-10-29 | 广州汉光电气股份有限公司 | A kind of metering device and end metering device of three phase electrical parameters |
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