CN104502694A - Single-phase electric energy meter sampling circuit - Google Patents
Single-phase electric energy meter sampling circuit Download PDFInfo
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- CN104502694A CN104502694A CN201410851102.4A CN201410851102A CN104502694A CN 104502694 A CN104502694 A CN 104502694A CN 201410851102 A CN201410851102 A CN 201410851102A CN 104502694 A CN104502694 A CN 104502694A
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- resistance
- live wire
- manganese
- copper
- energy meter
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- 238000005070 sampling Methods 0.000 title abstract description 7
- HPDFFVBPXCTEDN-UHFFFAOYSA-N copper manganese Chemical compound [Mn].[Cu] HPDFFVBPXCTEDN-UHFFFAOYSA-N 0.000 claims description 25
- 238000005259 measurement Methods 0.000 claims description 24
- 238000012423 maintenance Methods 0.000 abstract description 5
- 239000003990 capacitor Substances 0.000 abstract 4
- 229910000896 Manganin Inorganic materials 0.000 abstract 3
- 239000004020 conductor Substances 0.000 abstract 3
- 238000010586 diagram Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 1
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Abstract
The invention discloses a single-phase electric energy meter sampling circuit. An input end of a power transformer T1 is connected with a live wire through a live wire conductor; the live wire conductor is grounded; both ends of manganin R0 are in live wire connection; one end of a resistor R1 is connected with a sampling line through one end of the manganin R0, and the other end of the resistor R1 is connected with one end of a capacitor C1 and one end of a high-resistance resistor Z1; one end of the resistor R2 is connected with the other end of the manganin R0 through one sampling line; the other end of the resistor R2 is connected with one end of the capacitor C2 and one end of a high-resistance resistor Z2; the other end of the capacitor C1, the other end of the capacitor C2, the other end of the high-resistance resistor Z1 and the other end of the high-resistance resistor Z2 are all grounded; the circuit also comprises resistors R11, R12 and Rc. The sampling circuit can still sample normally under the condition that the live wire conductor is broken or one sampling line is broken, so that the repair rate is greatly reduced, and the maintenance cost is greatly reduced to a certain extent.
Description
Technical field
The present invention relates to electric energy meter technical field, is specifically a kind of single-phase electric energy meter sample circuit.
Background technology
The single-phase electric energy meter sample circuit of prior art as shown in Figure 1, it comprises resistance R1, R2, electric capacity C1, C2, copper-manganese R0, two high resistance measurements Z1, Z2 and power transformer T1, two high resistance measurements Z1, Z2 are equivalent to resistance, resistance is megaohm rank, but is the inside equiva lent impedance over the ground of computation chip pin in fact; One input end of described power transformer T1 is connected by a live wire wire with live wire, described live wire wired earth; The equal live wire in two ends of described copper-manganese R0 connects; One end of described resistance R1 is connected by a sample line with one end of copper-manganese R0, and the other end of described resistance R1 is connected with one end of one end of electric capacity C1, high resistance measurement Z1; One end of described resistance R2 is connected by a sample line with the other end of copper-manganese R0, and the other end of described resistance R2 is connected with one end of one end of electric capacity C2, high resistance measurement Z2; The other end of the other end of described electric capacity C1, the other end of electric capacity C2, high resistance measurement Z1, the equal ground connection of the other end of high resistance measurement Z2.In the transportation of electric energy meter, due to vibration or Welding Problems own, be easy to cause live wire wire to break or wherein sample line is broken or two sample line are all broken or live wire wire and two sample line are all broken, make the two-arm impedance unbalance of single-phase electric energy meter sample circuit, thus occur the inaccurate or non-metering situation of metering.In above-mentioned situation, two sample line are all broken or live wire wire and two sample line are all broken, and both of these case odds is lower, unlikely often occurs; And live wire wire breaks or wherein the occurrence probability that breaks of sample line is higher.And if will occur that the electric energy meter of above-mentioned situation all returns factory, then can increase maintenance cost greatly.Therefore, urgently need a kind of single-phase electric energy meter sample circuit, this sample circuit occur live wire wire break or wherein sample line break situation time still can normal sample, thus repair rate to be reduced greatly, significantly reduce maintenance cost to a certain extent, to solve the problem.
Summary of the invention
The technical problem to be solved in the present invention is, a kind of single-phase electric energy meter sample circuit is provided, this sample circuit occur live wire wire break or wherein sample line break situation time still can normal sample, thus repair rate is reduced greatly, significantly reduce maintenance cost to a certain extent.
Technical scheme of the present invention is, provides a kind of single-phase electric energy meter sample circuit, comprises resistance R1, R2, electric capacity C1, C2, copper-manganese R0, two high resistance measurements Z1, Z2 and power transformer T1; One input end of described power transformer T1 is connected by a live wire wire with live wire, described live wire wired earth; The equal live wire in two ends of described copper-manganese R0 connects; One end of described resistance R1 is connected by a sample line with one end of copper-manganese R0, and the other end of described resistance R1 is connected with one end of one end of electric capacity C1, high resistance measurement Z1; One end of described resistance R2 is connected by a sample line with the other end of copper-manganese R0, and the other end of described resistance R2 is connected with one end of one end of electric capacity C2, high resistance measurement Z2; The other end of the other end of described electric capacity C1, the other end of electric capacity C2, high resistance measurement Z1, the equal ground connection of the other end of high resistance measurement Z2; Described single-phase electric energy meter sample circuit also comprises resistance R11, R12 and Rc; Described resistance R11 is identical with the resistance of resistance R12; The two ends of described resistance Rc are connected with the two ends of copper-manganese R0 respectively; One end of described resistance R11 is connected with one end of copper-manganese R0; One end of described resistance R12 is connected with the other end of copper-manganese R0; The other end of described resistance R11, the equal ground connection of the other end of resistance R12.
The value of described resistance R11 and resistance R12 is 20 ohm; The value of described resistance Rc is 1 ohm.
After adopting above structure, the present invention compared with prior art, has the following advantages:
If when single-phase electric energy meter sample circuit live wire wire of the present invention breaks, at resistance R1, high resistance measurement Z1 and resistance R2, high resistance measurement Z2 symmetrical parallel resistance R11 and resistance R12 again, namely provide power supply by resistance R11 and resistance R12 for adopting, thus reach the object significantly shunted.And if when a sample line is broken, be then connection line by resistance Rc, namely two-way electric current respectively self-resistance R1 and resistance Rc flow through or two-way electric current respectively self-resistance R2 and resistance Rc flow through, thus make sampling comparatively accurate.When there is the situation that live wire wire breaks or wherein the occurrence probability that breaks of sample line is higher in single-phase electric energy meter sample circuit of the present invention, prevent electric energy meter from measuring " flying away ", namely user is in non-electric situation, electric energy meter is also in metering at a high speed, cause unnecessary loss, thus greatly reduce repair rate and maintenance cost.
Accompanying drawing explanation
Fig. 1 is the circuit theory diagrams of prior art single-phase electric energy meter sample circuit.
Fig. 2 is the circuit theory diagrams of single-phase electric energy meter sample circuit of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
As shown in Figure 2, a kind of single-phase electric energy meter sample circuit of the present invention, comprise resistance R1, R2, electric capacity C1, C2, copper-manganese R0, two high resistance measurements Z1, Z2 and power transformer T1, two high resistance measurements Z1, Z2 are equivalent to resistance, and resistance is megaohm rank, but are the inside equiva lent impedance over the ground of computation chip pin in fact; One input end of described power transformer T1 is connected by a live wire wire with live wire, described live wire wired earth; The equal live wire in two ends of described copper-manganese R0 connects; One end of described resistance R1 is connected by a sample line with one end of copper-manganese R0, and the other end of described resistance R1 is connected with one end of one end of electric capacity C1, high resistance measurement Z1; One end of described resistance R2 is connected by a sample line with the other end of copper-manganese R0, and the other end of described resistance R2 is connected with one end of one end of electric capacity C2, high resistance measurement Z2; The other end of the other end of described electric capacity C1, the other end of electric capacity C2, high resistance measurement Z1, the equal ground connection of the other end of high resistance measurement Z2; Described single-phase electric energy meter sample circuit also comprises resistance R11, R12 and Rc; Described resistance R11 is identical with the resistance of resistance R12; The two ends of described resistance Rc are connected with the two ends of copper-manganese R0 respectively; One end of described resistance R11 is connected with one end of copper-manganese R0; One end of described resistance R12 is connected with the other end of copper-manganese R0; The other end of described resistance R11, the equal ground connection of the other end of resistance R12.Z1, Z2 are computation chip internal resistance, without this resistance in reality.
The value of described resistance R11 and resistance R12 is 20 ohm; The value of described resistance Rc is 1 ohm, and this value can meet the standard of state's net.
Below only just most preferred embodiment of the present invention is described, but can not be interpreted as it is limitations on claims.The present invention is not limited only to above embodiment, and its concrete structure allows to change.In every case the various change done in the protection domain of independent claims of the present invention is all in protection scope of the present invention.
Claims (2)
1. a single-phase electric energy meter sample circuit, comprises resistance R1, R2, electric capacity C1, C2, copper-manganese R0, two high resistance measurements Z1, Z2 and power transformer T1; One input end of described power transformer T1 is connected by a live wire wire with live wire, described live wire wired earth; The equal live wire in two ends of described copper-manganese R0 connects; One end of described resistance R1 is connected by a sample line with one end of copper-manganese R0, and the other end of described resistance R1 is connected with one end of one end of electric capacity C1, high resistance measurement Z1; One end of described resistance R2 is connected by a sample line with the other end of copper-manganese R0, and the other end of described resistance R2 is connected with one end of one end of electric capacity C2, high resistance measurement Z2; The other end of the other end of described electric capacity C1, the other end of electric capacity C2, high resistance measurement Z1, the equal ground connection of the other end of high resistance measurement Z2; It is characterized in that: described single-phase electric energy meter sample circuit also comprises resistance R11, R12 and Rc; Described resistance R11 is identical with the resistance of resistance R12; The two ends of described resistance Rc are connected with the two ends of copper-manganese R0 respectively; One end of described resistance R11 is connected with one end of copper-manganese R0; One end of described resistance R12 is connected with the other end of copper-manganese R0; The other end of described resistance R11, the equal ground connection of the other end of resistance R12.
2. single-phase electric energy meter sample circuit according to claim 1, is characterized in that: the value of described resistance R11 and resistance R12 is 20 ohm; The value of described resistance Rc is 1 ohm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410851102.4A CN104502694A (en) | 2014-12-31 | 2014-12-31 | Single-phase electric energy meter sampling circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410851102.4A CN104502694A (en) | 2014-12-31 | 2014-12-31 | Single-phase electric energy meter sampling circuit |
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| Publication Number | Publication Date |
|---|---|
| CN104502694A true CN104502694A (en) | 2015-04-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410851102.4A Pending CN104502694A (en) | 2014-12-31 | 2014-12-31 | Single-phase electric energy meter sampling circuit |
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| CN (1) | CN104502694A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106093836A (en) * | 2016-06-22 | 2016-11-09 | 宁波三星医疗电气股份有限公司 | A kind of table meter power circuit |
| CN106918738A (en) * | 2015-12-28 | 2017-07-04 | 上海贝岭股份有限公司 | The metering control system of current divider in electric energy meter |
| CN108469540A (en) * | 2017-12-27 | 2018-08-31 | 浙江恒业电子有限公司 | A kind of anti-circuit to fly away of electric energy meter |
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| CN201503454U (en) * | 2009-08-26 | 2010-06-09 | 宁波三星电气股份有限公司 | Connection mode for relay and manganin shunt |
| CN101750528A (en) * | 2008-12-11 | 2010-06-23 | 江苏林洋电子股份有限公司 | Enhancing type method for preventing electricity stealing and electric energy meter thereof |
| CN201788230U (en) * | 2010-07-16 | 2011-04-06 | 珠海中慧微电子有限公司 | Dual manganin current sampling circuit |
| CN102072978A (en) * | 2011-01-25 | 2011-05-25 | 武汉盛帆电子股份有限公司 | Single-phase double-circuit manganese copper metering anti-theft electric charge-controlled intelligent electric energy meter |
| CN202614842U (en) * | 2012-05-18 | 2012-12-19 | 福建省电力有限公司 | Anti-creep sampling device of electric energy meter |
| CN202929082U (en) * | 2012-11-23 | 2013-05-08 | 江苏卡欧万泓电子有限公司 | Circuit used in intelligent electric energy meter for preventing current sampling offset |
| CN203630178U (en) * | 2013-11-08 | 2014-06-04 | 国家电网公司 | Current sampler of single-phase smart meter |
| CN203965517U (en) * | 2013-11-08 | 2014-11-26 | 国家电网公司 | A kind of single-phase intelligent type electric energy meter |
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2014
- 2014-12-31 CN CN201410851102.4A patent/CN104502694A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101750528A (en) * | 2008-12-11 | 2010-06-23 | 江苏林洋电子股份有限公司 | Enhancing type method for preventing electricity stealing and electric energy meter thereof |
| CN201503454U (en) * | 2009-08-26 | 2010-06-09 | 宁波三星电气股份有限公司 | Connection mode for relay and manganin shunt |
| CN201788230U (en) * | 2010-07-16 | 2011-04-06 | 珠海中慧微电子有限公司 | Dual manganin current sampling circuit |
| CN102072978A (en) * | 2011-01-25 | 2011-05-25 | 武汉盛帆电子股份有限公司 | Single-phase double-circuit manganese copper metering anti-theft electric charge-controlled intelligent electric energy meter |
| CN202614842U (en) * | 2012-05-18 | 2012-12-19 | 福建省电力有限公司 | Anti-creep sampling device of electric energy meter |
| CN202929082U (en) * | 2012-11-23 | 2013-05-08 | 江苏卡欧万泓电子有限公司 | Circuit used in intelligent electric energy meter for preventing current sampling offset |
| CN203630178U (en) * | 2013-11-08 | 2014-06-04 | 国家电网公司 | Current sampler of single-phase smart meter |
| CN203965517U (en) * | 2013-11-08 | 2014-11-26 | 国家电网公司 | A kind of single-phase intelligent type electric energy meter |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106918738A (en) * | 2015-12-28 | 2017-07-04 | 上海贝岭股份有限公司 | The metering control system of current divider in electric energy meter |
| CN106918738B (en) * | 2015-12-28 | 2020-08-25 | 上海贝岭股份有限公司 | Metering control system of shunt in electric energy meter |
| CN106093836A (en) * | 2016-06-22 | 2016-11-09 | 宁波三星医疗电气股份有限公司 | A kind of table meter power circuit |
| CN108469540A (en) * | 2017-12-27 | 2018-08-31 | 浙江恒业电子有限公司 | A kind of anti-circuit to fly away of electric energy meter |
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Owner name: NINGBO SANXING INTELLIGENT ELECTRIC CO., LTD. Free format text: FORMER OWNER: NINGBO SANXING ELECTRIC CO., LTD. Effective date: 20150513 |
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Effective date of registration: 20150513 Address after: 315034 Ningbo, Jiangbei District, Zhejiang City, the town of Maple Bay Road, No. 16 Applicant after: Ningbo Samsung intelligent electric company limited Address before: 315131, AUX Industrial Park, Mingguang North Road, Jiangshan Town, Ningbo, Yinzhou District, Zhejiang 1166, China Applicant before: Ningbo Sanxing Electric Co., Ltd. |
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| C41 | Transfer of patent application or patent right or utility model | ||
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Effective date of registration: 20160129 Address after: 315191 Yinzhou Industrial Park, Zhejiang, Ningbo, Yinzhou District, Ningbo Applicant after: NINGBO SANXING MEDICAL ELECTRIC CO., LTD. Address before: 315034 Ningbo, Jiangbei District, Zhejiang City, the town of Maple Bay Road, No. 16 Applicant before: Ningbo Samsung intelligent electric company limited |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150408 |
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| RJ01 | Rejection of invention patent application after publication |