CN104821653A - Ammeter and power supply circuit therein, and power supply control method inside the ammeter - Google Patents

Ammeter and power supply circuit therein, and power supply control method inside the ammeter Download PDF

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Publication number
CN104821653A
CN104821653A CN201510142622.2A CN201510142622A CN104821653A CN 104821653 A CN104821653 A CN 104821653A CN 201510142622 A CN201510142622 A CN 201510142622A CN 104821653 A CN104821653 A CN 104821653A
Authority
CN
China
Prior art keywords
power supply
switch
ammeter
voltage
function element
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201510142622.2A
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Chinese (zh)
Inventor
虞伟
贺伟军
姜才军
王建军
王炜凯
戴浩斌
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
State Grid Corp of China SGCC
Daishan Power Supply Co of State Grid Zhejiang Electric Power Co Ltd
Original Assignee
State Grid Corp of China SGCC
Daishan Power Supply Co of State Grid Zhejiang Electric Power Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by State Grid Corp of China SGCC, Daishan Power Supply Co of State Grid Zhejiang Electric Power Co Ltd filed Critical State Grid Corp of China SGCC
Priority to CN201510142622.2A priority Critical patent/CN104821653A/en
Publication of CN104821653A publication Critical patent/CN104821653A/en
Pending legal-status Critical Current

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Classifications

    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/30Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04SSYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S20/00Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
    • Y04S20/20End-user application control systems

Abstract

The embodiment of the invention provides an ammeter. The ammeter comprises function devices and a power supply priority control circuit coupled thereto through a power line. The power supply priority control circuit comprises a first power supply, wherein an alternate voltage drop circuit performs A/D conversion of the AC voltage portion in the power supply and converts the AC voltage portion into first DC voltage through an electrically coupled DC/DC converter for supplying to a part of the function devices for operation; a first switch controlling on-off of the first power supply and the ammeter function devices; a second power supply used for directly supplying DC voltage to the other part of the ammeter function devices; a second switch controlling on-off of the second power supply and the ammeter function devices; and a voltage limiting device connected between the first switch and the second switch for controlling the corresponding on-off sequence of the second switch through the on-off of the first switch. The invention also discloses a power supply circuit inside the ammeter, and a power supply control method inside the ammeter.

Description

The power supply circuits of ammeter and inside thereof, the method for controlling power supply of ammeter inside
Technical field
The embodiment of the present invention relates generally to grid power control technology, and in more specific words it, relate to a kind of ammeter and power control circuit thereof.
Background technology
Electrical measuring device, especially the part of functions panel element in ammeter or distribution transforming acquisition terminal needs to use battery to power, such as in three-phase intelligent table, be designed with two kinds of batteries, one is Clock battery, another kind stops copying battery, and these two kinds of batteries are preserved in the data of three-phase intelligent ammeter, disbursement and sattlement has very important effect.If battery power consumption is excessive in actual applications, can battery be had a strong impact on, reduce the fail safe that electric energy meter uses.Switching to better realize battery, reducing battery loss, therefore proposing a kind of battery switching circuit built based on P-MOS technology.
Summary of the invention
The present invention utilizes P channel mosfet to build power supply switch circuit, reduces the wastage, and can realize electrical source exchange very well, reduces energy consumption.In a preferred embodiment, design multiple-way supply control circuit, powering to function element for selecting and controlling at least one power supply, comprising: at described the first switch arranged between at least one power supply and function element, for selecting power supply; Connect the second switch of described first switch, carry out closing or disconnecting action according to described first switch, and at least one power supply described in connecting further is to form closed-loop path; And the voltage limiting device be arranged in described closed-loop path, for controlling the break-make order between described second switch.
In one embodiment, comprise further: be connected to described alternation reduction voltage circuit between at least one power supply and the first switch, for the alternating voltage part in described power supply is carried out A/D conversion, and convert the first direct voltage to, for part of functions devices function by the DC/DC converter of an electric coupling.
In one embodiment, described first direct voltage is arranged for control first switch conduction or cut-off, to become the second direct voltage further by the first switch transition, works for another part function element.
In one embodiment, described second direct voltage for suppressing the closed of second switch, thus is suppressed other remaining power supplys to be powered to function element by voltage limiting device.
In one embodiment, described voltage limiting device is TTL transistor.
In one embodiment, between described first switch and function element, be provided with forward direction actuating switch, export to function element first direct voltage, and suppress the direct voltage from other remaining power supplys.
In one embodiment, for each other remaining power supply configures a second switch.
In another embodiment, integrated power supply control board in ammeter, the feature board of ammeter is coupled by power line, described integrated power supply control board includes multiple power supply, for powering to described feature board, it comprises further: the first switch arranged between described multiple power supply and feature board, for carrying out selecting a selection in this multiple power supply; Connect the second switch of described first switch, carry out closing or disconnecting action according to described first switch, and at least one power supply described in connecting further is to form closed-loop path; And the voltage limiting device be arranged in described closed-loop path, for controlling the break-make order between described second switch, wherein said first switch or second switch connect a DC/DC converter respectively, to be converted to the operating voltage needed for feature board.
In one embodiment, described second switch is voltage suppressive transistor array, its etc. the voltage signal be controlled by from described voltage limiting device change.
In one embodiment, be connected to the alternation reduction voltage circuit between described power supply and the first switch, for the alternating voltage part in described power supply is carried out A/D conversion, and convert the first direct voltage to, for feature board work by described DC/DC converter.In one embodiment, between described first switch and feature board, be provided with forward direction actuating switch, export to described feature board first direct voltage, and suppress the direct voltage from other remaining power supplys.
In one embodiment, when described first switch disconnects, described forward direction actuating switch conducting other remaining power supplys, work for part of functions plate.
In one embodiment, when the one in described second switch disconnects, another other remaining power supplys of described forward direction actuating switch conducting, work for another part feature board.
In one embodiment, for each other remaining power supply configures a second switch.
Design a kind of ammeter in another embodiment, comprise function element, and with it by power supply two priority classes circuit that power line couples, it comprises the first power supply, by its alternation reduction voltage circuit, the alternating voltage part in described power supply is carried out A/D conversion, and convert the first direct voltage to by the DC/DC converter of an electric coupling, for a part of ammeter function element work; Control the first switch of described first power supply and ammeter function element break-make; Second source, for directly for another part ammeter function element provides direct voltage; Control the second switch of described second source and ammeter function element break-make; And the voltage limiting device be connected between described first switch and second switch, for being controlled the corresponding break-make order of second switch by the break-make of the first switch.In one embodiment, described first switch is connected DC/DC converter respectively with second switch, to be converted to the operating voltage needed for described function element.
In one embodiment, between described DC/DC converter and function element, be provided with forward direction actuating switch, only export to described function element direct voltage, and suppress the direct voltage from other remaining power supplys.
In one embodiment, described first switch or voltage limiting device are TTL transistor.
In one embodiment, described second switch is voltage suppressive transistor array, its/its etc. the voltage signal be controlled by from described voltage limiting device change.
In one embodiment, described function element comprises single-chip microcomputer on sheet, and its port PWR_CH connects voltage limiting device, controls described single-chip microcomputer do not receive direct voltage from the first power supply when described voltage limiting device conducting.
Technique effect of the present invention is obvious, builds power supply switch circuit, reduce the wastage by P channel mosfet, electrical source exchange can be realized very well, separately power supply can be carried out according to the needs of ammeter functional circuit plate, can drip very well and utilize battery supply, reduce dismounting and the maintenance cost of electrical measuring device.
Accompanying drawing explanation
Fig. 1 is the local circuit theory diagram of embodiment of the present invention power control circuit.
Embodiment
With reference to Fig. 1, wherein schematically show the multiple-way supply control circuit in a three-phase kilowatt-hour meter, power to function element in ammeter for selecting and controlling multiple power supply, be included in described the first switch arranged between at least one power supply and function element, the triode D6 being preferably triode D5 and being electrically connected with it, for selecting power supply, such as, obtaining AC power source by outside and changed CT by stream pressure and be transformed between direct current that D.C. high-current and inner accumulator provide and select; Connect second switch Q1 and Q2 of described first switch D5, carry out closing or disconnecting action according to described first switch D5 and D6, and connect multiple power supplies further to form a closed-loop path; And the voltage limiting device be arranged in described closed-loop path, for controlling described first switch and second switch, or the break-make order between second switch.
In one embodiment, described power supply comprises the alternation reduction voltage circuit be connected between power supply and the first switch Q5 further, such as common CT type reduction voltage circuit or capacitance-resistance voltage reduction circuit, alternating voltage part in 220V AC power is carried out A/D conversion, and convert the first direct voltage to by the DC/DC converter U1 of an electric coupling, such as+4V, for part of functions devices function.
In one embodiment, described first direct voltage is arranged for control first switch conduction or cut-off, to become the second direct voltage further by the first switch transition, works for another part function element.
In one embodiment, described second direct voltage for suppressing the closed of second switch, thus is suppressed other remaining power supplys to be powered to function element by voltage limiting device.
In one embodiment, described voltage limiting device selects D6, it can as the switch of TTL transistor switch or pressure-limiting function, as shown in the figure, when there is AC signal in AC power source MP_IN, triode D5 conducting, thus used to function element by the direct voltage that DC/DC converter U1 obtains+4V, make triode D6 end simultaneously, and blocking action have impact on the shutoff of second switch Q1 and Q2 of rear end then, thus direct-current power supply VCC end in Jin You mono-road exports function element to.In one embodiment, forward direction actuating switch (bidirectional switch D1 is as illustrated in the drawing provided with between described first switch D5 and function element, D2), when exporting to first direct voltage of function element+4V, suppress from other remaining power supplys part BAT1, the direct voltage of BAT2.Due to MOS array Q1, even if Q2 cut-off, but still Weak current outflow can be there is, therefore cutoff switch D2 is set and flow into VCC end to suppress this part electric current, save electric power further simultaneously.
In the illustrated embodiment in which, for each remaining power supply BAT1 and BAT2 configures second switch Q1 and Q2 respectively.
In one embodiment, in this three-phase kilowatt-hour meter, have three-way power, be respectively that AC rectification step-down is powered, stopped copying powered battery BAT2, Clock battery powers BAT1, its power supply priority is set to reduce successively.
When the external power line that ammeter line concentration end connects there being alternating current, ammeter utilizes such as DC/DC to reduce the first power supply that chip exports+4V, and utilize this+4V power supply as signal, conducting NPN type triode D5, due to D5 conducting ground connection, triode D6 ended and export+3.3V high level, because P-MOS transistor npn npn Q1 is voltage control transistor, as its V gsvoltage is higher than transistor cutoff during 1.8V, therefore the high level utilizing triode D6 to export ends these two P-MOS of Q1, Q2 controlling to stop copying battery BAT2, Clock battery BAT1, now directly provide power supply by+4V first power supply through diode D1, these two batteries not supplying power for outside.
In another embodiment, design the integrated power supply control board in a kind of ammeter, the feature board of ammeter is coupled by power line, integrated power supply control board includes 3 road power supplys, for powering to described feature board, it comprises further: the first switch D5 arranged between described multiple power supply and feature board, for carrying out selecting a selection in this multiple power supply; Connect the second switch Q1 of described first switch D5, Q2, carry out closing or disconnecting action according to described first switch D5, and at least one power supply described in connecting further is to form closed-loop path; And the voltage limiting device be arranged in described closed-loop path, for controlling the break-make order between described second switch, wherein said first switch or second switch connect a DC/DC converter respectively, to be converted to the operating voltage needed for feature board.
In one embodiment, described second switch is voltage suppressive transistor array, its etc. the voltage signal be controlled by from described voltage limiting device change.
In one embodiment, be connected to the alternation reduction voltage circuit between described power supply and the first switch, for the alternating voltage part in described power supply is carried out A/D conversion, and convert the first direct voltage to, for feature board work by described DC/DC converter.In one embodiment, between described first switch and feature board, be provided with forward direction actuating switch, export to described feature board first direct voltage, and suppress the direct voltage from other remaining power supplys.
In one embodiment, when described first switch disconnects, described forward direction actuating switch conducting other remaining power supplys, work for part of functions plate.
In one embodiment, when the one in described second switch disconnects, another other remaining power supplys of described forward direction actuating switch conducting, work for another part feature board.
In one embodiment, for each other remaining power supply configures a second switch.
Design a kind of ammeter in another embodiment, comprise function element, and with it by power supply two priority classes circuit that power line couples, it comprises the first power supply, by its alternation reduction voltage circuit, the alternating voltage part in described power supply is carried out A/D conversion, and convert the first direct voltage to by the DC/DC converter of an electric coupling, for a part of ammeter function element work; Control the first switch of described first power supply and ammeter function element break-make; Second source, for directly for another part ammeter function element provides direct voltage; Control the second switch of described second source and ammeter function element break-make; And the voltage limiting device be connected between described first switch and second switch, for being controlled the corresponding break-make order of second switch by the break-make of the first switch.In one embodiment, described first switch is connected DC/DC converter respectively with second switch, to be converted to the operating voltage needed for described function element.
In one embodiment, between described DC/DC converter and function element, be provided with forward direction actuating switch, only export to described function element direct voltage, and suppress the direct voltage from other remaining power supplys.
In one embodiment, described first switch or voltage limiting device are TTL transistor.
In one embodiment, described second switch is voltage suppressive transistor array, its/its etc. the voltage signal be controlled by from described voltage limiting device change.
In one embodiment, described upper function element comprises single-chip microcomputer on sheet, and its port PWR_CH connects voltage limiting device, controls described single-chip microcomputer do not receive+4V direct voltage from the first power supply when described voltage limiting device D6 conducting, and select remaining direct voltage BAT1, BAT2.
In another embodiment, design a kind of power supply circuits of ammeter inside, comprise the N level power supply unit of mutual cascade, each power supply unit includes several the first power supplys, by its alternation reduction voltage circuit, the alternating voltage part in described power supply is carried out A/D conversion, and convert the first direct voltage to by the DC/DC converter of an electric coupling, for a part of ammeter function element work; Control the first switch of each first power supply and ammeter function element break-make; Several second sources, for directly for another part ammeter function element provides direct voltage; Control the second switch of each second source and ammeter function element break-make; And the voltage limiting device be connected between described first switch and second switch, for being controlled the corresponding break-make order of second switch by the break-make of the first switch.
In one embodiment, the function element of ammeter includes multiple easily extensible outside port, and each easily extensible port connects a power supply unit, and the power supply order between the power supply unit of wherein each power supply unit and cascade before reduces step by step.
In one embodiment, described power supply circuits comprise the hardware state machine that connects described multiple easily extensible outside port further, for judging the size of the logic level between two power supply units according to the order of required power supply, to select different power supply units.In another embodiment, design a kind of method for controlling power supply of ammeter inside, comprise step: in ammeter, arrange multiple power supply lines, each supply line connects a power supply two priority classes circuit; By the alternation reduction voltage circuit in power supply two priority classes circuit, the alternating voltage part in described power supply is carried out A/D conversion, and convert the first direct voltage to by the DC/DC converter of an electric coupling, for a part of ammeter function element work; By the break-make described in the first switch control rule in power supply two priority classes circuit between the first power supply and ammeter function element; By the second source of power supply two priority classes circuit directly for another part ammeter function element provides direct voltage; The break-make of described second source and ammeter function element is controlled by the second switch of power supply two priority classes circuit; And the order of the break-make relative to the first switch of second switch is controlled by the voltage limiting device be connected between described first switch and second switch.
In one embodiment, the step of multiple power supply two priority classes circuit being carried out cascade is comprised further.
In one embodiment, when ammeter external power line does not have alternating current, DC/DC converter U1 does not work, triode D5 ends, and triode D6 conducting output low level, the grid now controlling to stop the transistor Q1 copying battery BAT2 is set to low level, therefore transistor Q1 conducting, stop copying battery BAT2 and through DC/DC converter chip U1, VCC is powered.
Only do not having external communication electricity with under the condition of stopping copying battery BAT2, just can open Clock battery BAT1 power supply, now single-chip microcomputer enters park mode, therefore battery power consumption can be controlled at about 1uA, thus ensures the Clock battery working life of 10 years.

Claims (10)

1. ammeter, it is characterized in that: comprise function element, and with it by power supply two priority classes circuit that power line couples, it comprises the first power supply, by its alternation reduction voltage circuit, the alternating voltage part in described power supply is carried out A/D conversion, and convert the first direct voltage to by the DC/DC converter of an electric coupling, for a part of ammeter function element work; Control the first switch of described first power supply and ammeter function element break-make; Second source, for directly for another part ammeter function element provides direct voltage; Control the second switch of described second source and ammeter function element break-make; And the voltage limiting device be connected between described first switch and second switch, for being controlled the corresponding break-make order of second switch by the break-make of the first switch.
2. ammeter according to claim 1, it is characterized in that: described first switch is connected DC/DC converter respectively with second switch, to be converted to the operating voltage needed for described function element, wherein between described DC/DC converter and function element, be provided with forward direction actuating switch, only export to described function element direct voltage, and suppress the direct voltage from other remaining power supplys.
3. ammeter according to claim 1, is characterized in that: described first switch or voltage limiting device are TTL transistor.
4. ammeter according to claim 1, is characterized in that: described second switch is voltage suppressive transistor array, its/its etc. the voltage signal be controlled by from described voltage limiting device change.
5. ammeter according to claim 1, is characterized in that: described function element comprises single-chip microcomputer on sheet, and its port PWR_CH connects voltage limiting device, controls described single-chip microcomputer do not receive direct voltage from the first power supply when described voltage limiting device conducting.
6. a method for controlling power supply for ammeter inside, is characterized in that comprising step: in ammeter, arrange multiple power supply lines, and each supply line connects a power supply two priority classes circuit; By the alternation reduction voltage circuit in power supply two priority classes circuit, the alternating voltage part in described power supply is carried out A/D conversion, and convert the first direct voltage to by the DC/DC converter of an electric coupling, for a part of ammeter function element work; By the break-make described in the first switch control rule in power supply two priority classes circuit between the first power supply and ammeter function element; By the second source of power supply two priority classes circuit directly for another part ammeter function element provides direct voltage; The break-make of described second source and ammeter function element is controlled by the second switch of power supply two priority classes circuit; And the order of the break-make relative to the first switch of second switch is controlled by the voltage limiting device be connected between described first switch and second switch.
7. the method for controlling power supply of ammeter inside according to claim 6, is characterized in that comprising the step of multiple power supply two priority classes circuit being carried out cascade further.
8. the power supply circuits of an ammeter inside, it is characterized in that: the N level power supply unit comprising mutual cascade, each power supply unit includes several the first power supplys, by its alternation reduction voltage circuit, the alternating voltage part in described power supply is carried out A/D conversion, and convert the first direct voltage to by the DC/DC converter of an electric coupling, for a part of ammeter function element work; Control the first switch of each first power supply and ammeter function element break-make; Several second sources, for directly for another part ammeter function element provides direct voltage; Control the second switch of each second source and ammeter function element break-make; And the voltage limiting device be connected between described first switch and second switch, for being controlled the corresponding break-make order of second switch by the break-make of the first switch.
9. the power supply circuits of ammeter inside according to claim 8, it is characterized in that: the function element of described ammeter includes multiple easily extensible outside port, each easily extensible port connects a power supply unit, and the power supply order between the power supply unit of wherein each power supply unit and cascade before reduces step by step.
10. the power supply circuits of ammeter inside according to claim 9, it is characterized in that: described power supply circuits comprise the hardware state machine that connects described multiple easily extensible outside port further, for judging the size of the logic level between two power supply units according to the order of required power supply, to select different power supply units.
CN201510142622.2A 2015-03-27 2015-03-27 Ammeter and power supply circuit therein, and power supply control method inside the ammeter Pending CN104821653A (en)

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CN201510142622.2A CN104821653A (en) 2015-03-27 2015-03-27 Ammeter and power supply circuit therein, and power supply control method inside the ammeter

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105572471A (en) * 2015-12-18 2016-05-11 杭州意聚电子技术有限公司 Multipath meter, built-in circuit board and centralized meter reading system
CN106443102A (en) * 2016-10-31 2017-02-22 宁波三星医疗电气股份有限公司 Power supply distribution system for twin-core electric energy meter
CN106597088A (en) * 2016-10-31 2017-04-26 宁波三星医疗电气股份有限公司 Power source distribution system of dual-core electric energy meter

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2567788Y (en) * 2002-05-16 2003-08-20 上海齐益电子仪器有限公司 Battery box for safety protector of train tail
CN101141078A (en) * 2006-09-04 2008-03-12 三星电子株式会社 Power supply apparatus
CN203596658U (en) * 2013-12-13 2014-05-14 四川宏平电子有限公司 Power supply control output circuit
CN104253477A (en) * 2013-06-28 2014-12-31 索尼公司 Power supply switching circuit, electronic device, and control method of power supply switching circuit
CN204465135U (en) * 2015-03-27 2015-07-08 国家电网公司 The power supply circuits of ammeter and inside thereof

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2567788Y (en) * 2002-05-16 2003-08-20 上海齐益电子仪器有限公司 Battery box for safety protector of train tail
CN101141078A (en) * 2006-09-04 2008-03-12 三星电子株式会社 Power supply apparatus
CN104253477A (en) * 2013-06-28 2014-12-31 索尼公司 Power supply switching circuit, electronic device, and control method of power supply switching circuit
CN203596658U (en) * 2013-12-13 2014-05-14 四川宏平电子有限公司 Power supply control output circuit
CN204465135U (en) * 2015-03-27 2015-07-08 国家电网公司 The power supply circuits of ammeter and inside thereof

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105572471A (en) * 2015-12-18 2016-05-11 杭州意聚电子技术有限公司 Multipath meter, built-in circuit board and centralized meter reading system
CN106443102A (en) * 2016-10-31 2017-02-22 宁波三星医疗电气股份有限公司 Power supply distribution system for twin-core electric energy meter
CN106597088A (en) * 2016-10-31 2017-04-26 宁波三星医疗电气股份有限公司 Power source distribution system of dual-core electric energy meter
CN106443102B (en) * 2016-10-31 2019-03-26 宁波三星医疗电气股份有限公司 A kind of power distribution system for twin-core electric energy meter
CN106597088B (en) * 2016-10-31 2019-05-17 宁波三星医疗电气股份有限公司 A kind of power distribution system of twin-core electric energy meter

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Application publication date: 20150805