CN2541848Y - Kilowatt-meter - Google Patents
Kilowatt-meter Download PDFInfo
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- CN2541848Y CN2541848Y CN 02210342 CN02210342U CN2541848Y CN 2541848 Y CN2541848 Y CN 2541848Y CN 02210342 CN02210342 CN 02210342 CN 02210342 U CN02210342 U CN 02210342U CN 2541848 Y CN2541848 Y CN 2541848Y
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- circuit
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Abstract
The utility model relates to an electric metering device, which can automatically switch multilevel variable ratio outputs of a current transformer. The utility model has technical projects that the utility model comprises an electrical signal primary treatment molectron and the like, which is characterized in that the utility model is provided with at least two switch circuits for controlling inputs of electrical network current transformer signals, jointed output ends of switch circuits are connected with a current signal transformation circuit, the output end of the current signal transformation circuit is connected with the electrical signal primary treatment molectron, the output end of the electrical signal primary treatment molectron is connected with a one-chip machine, and the signal output terminal of the one-chip machine is connected with the control end of the switch circuit. The utility model is especially suitable for on-line measurement of alternating current electric circuits with loads which can be greatly and frequently changed.
Description
Technical field: the utility model relates to a kind of electric power metering device.
Background technology: at present, although the power network current mutual inductor has many grades of no-load voltage ratio outputs, electrorheological all needs artificial wiring gear shift than the conversion of shelves.Because regular artificial shift is impossible realize, in fact just the useful range of electric power metering device has been limited to monotropic than fixing of can reaching of current transformer with limited range within.And electric load frequent variations and amplitude of variation are bigger in the reality, long can the no to scale scope, at this moment measuring apparatus can not effectively be measured certainly, when load surpasses on the range in limited time, even also may damage secondary instrument because of bigger electric current.
The utility model content: the technical problems to be solved in the utility model is to provide a kind of and can export the electric power metering device that automaticallyes switch to many grades of no-load voltage ratios of current transformer.Technical scheme: a kind of electric power metering device, constitute by electric power signal primary treatment integrated circuit etc., it is characterized in that: have the on-off circuit of two-way control power network current transducer signal input at least, connect the current signal change-over circuit after the signal output part tandem of on-off circuit, current signal change-over circuit output termination electric power signal primary treatment integrated circuit, the signal output part of electric power signal primary treatment integrated circuit connects single-chip microcomputer, and the signal output part of single-chip microcomputer connects the control end of on-off circuit.Beneficial effect: by automatic switchover to many grades of no-load voltage ratio outputs of current transformer, the effective measures range that makes electric power metering device no longer is the limited narrow range under any one independent no-load voltage ratio shelves wherein, and become the place an order stack of exclusive effect measures range of each no-load voltage ratio shelves, realized range ability matter and significant expansion.Be highly suitable for the on-line metering of the alternating electromotive force circuit of variation significantly of often loading.
Description of drawings:
Fig. 1 is circuit theory diagrams of the present utility model;
Fig. 2 is the circuit theory diagrams of on-off circuit embodiment one;
Fig. 3 is the circuit theory diagrams of on-off circuit embodiment two.
Embodiment: the utility model can measure the current signal of a phase, also can the current signal of two-phase, three-phase be measured, and in the present embodiment, as shown in Figure 1, electric power metering device measures two phase signals of electrical network.Each has the on-off circuit of two-way control power network current transducer signal input mutually at least, corresponding a phase switch circuit is KA1, KA2, KA3, corresponding c phase switch circuit is KC1, KC2, KC3, and the signal input part of on-off circuit is connected with the output terminal of the different no-load voltage ratios of power network current mutual inductor respectively.Be that example describes mutually with a below.Connect the current signal change-over circuit after the signal output part tandem of on-off circuit, the current signal change-over circuit is made of current transformer HI1 in the present embodiment, the output termination electric power signal primary treatment integrated circuit U1-2 (selecting CS5460A for use) of current transformer HI1, the signal output part of electric power signal primary treatment integrated circuit U1-2 meets single-chip microcomputer U1-1, and the signal output part of single-chip microcomputer U1-1 connects the control end of on-off circuit.The multiple device that on-off circuit can selective relay, controllable silicon, high power transistor, pulse transformer etc. have switching function.As shown in Figure 2, on-off circuit is selected controllable silicon D1 for use, and controllable silicon D1 is arranged on the power network current transducer signal incoming line, and the silicon controlled control end meets single-chip microcomputer U1-1.As shown in Figure 3, on-off circuit is selected relay J for use.Has the photoelectric coupling circuit that constitutes by light emitting diode D2, phototriode T1, the signal output part of photoelectric coupling circuit meets triode T2, the relay J of the output termination control power network current transducer signal input of triode T2, the contact J1-1 of relay is arranged on the power network current transducer signal incoming line.During work, the current signal of power network current mutual inductor output is converted to little current signal through current transformer HI1 and is input to the elementary calculation process that electric power signal primary treatment integrated circuit U1-2 carries out signal, and then enter single-chip microcomputer U1-1 and carry out computing and judge, send control signal by single-chip microcomputer, corresponding on-off circuit is switched on or switched off, thereby realizes the automatic switchover that power network current mutual inductor polytropic ratio blocks.
Claims (5)
1, a kind of electric power metering device, constitute by electric power signal primary treatment integrated circuit etc., it is characterized in that: have the on-off circuit of two-way control power network current transducer signal input at least, connect the current signal change-over circuit after the signal output part tandem of on-off circuit, the output termination electric power signal primary treatment integrated circuit of current signal change-over circuit, the signal output part of electric power signal primary treatment integrated circuit connects single-chip microcomputer, and the signal output part of single-chip microcomputer connects the control end of on-off circuit.
2, electric power metering device according to claim 1 is characterized in that: the on-off circuit of control power network current transducer signal input can be two to five the tunnel.
3, electric power metering device according to claim 2 is characterized in that: the current signal change-over circuit is a current transformer.
4, according to claim 2 or 3 described electric power metering devices, it is characterized in that: on-off circuit is a controllable silicon.
5, according to claim 2 or 3 described electric power metering devices, it is characterized in that: the structure of on-off circuit is, have photoelectric coupling circuit, the signal output part of photoelectric coupling circuit connects triode, the relay of the output termination control power network current transducer signal input of triode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02210342 CN2541848Y (en) | 2002-04-17 | 2002-04-17 | Kilowatt-meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02210342 CN2541848Y (en) | 2002-04-17 | 2002-04-17 | Kilowatt-meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2541848Y true CN2541848Y (en) | 2003-03-26 |
Family
ID=33690501
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02210342 Expired - Fee Related CN2541848Y (en) | 2002-04-17 | 2002-04-17 | Kilowatt-meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2541848Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102809678A (en) * | 2012-08-03 | 2012-12-05 | 江苏林洋电子股份有限公司 | Device for improving current sampling linear range and electric energy measuring accuracy of electric energy meter |
| CN103163347A (en) * | 2013-03-13 | 2013-06-19 | 绍兴电力局 | Adjustable current transducer with high accuracy |
-
2002
- 2002-04-17 CN CN 02210342 patent/CN2541848Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102809678A (en) * | 2012-08-03 | 2012-12-05 | 江苏林洋电子股份有限公司 | Device for improving current sampling linear range and electric energy measuring accuracy of electric energy meter |
| CN102809678B (en) * | 2012-08-03 | 2014-07-23 | 江苏林洋电子股份有限公司 | Device for improving current sampling linear range and electric energy measuring accuracy of electric energy meter |
| CN103163347A (en) * | 2013-03-13 | 2013-06-19 | 绍兴电力局 | Adjustable current transducer with high accuracy |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |