CN202794407U - Power utilization state monitoring instrument of self electricity taking three-phase electricity power circuit - Google Patents
Power utilization state monitoring instrument of self electricity taking three-phase electricity power circuit Download PDFInfo
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- CN202794407U CN202794407U CN 201220500976 CN201220500976U CN202794407U CN 202794407 U CN202794407 U CN 202794407U CN 201220500976 CN201220500976 CN 201220500976 CN 201220500976 U CN201220500976 U CN 201220500976U CN 202794407 U CN202794407 U CN 202794407U
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Abstract
The utility model discloses a power utilization state monitoring instrument of a self electricity taking three-phase electricity power circuit, belongs to the technical field of electric instrument, and solves a technical problem of low power supply stability of an existing self electricity pick-up instrument. The instrument is provided with three battle line accessing terminals, and is built in with power utilization monitoring circuits and an electricity taking module. The electricity taking module comprises a voltage stabilization chip and three transformers. Primary windings of the three transformers form a triangular three-phase symmetric load return circuit and the triangular three-phase symmetric load return circuit is connected with the three battle line accessing terminals. Secondary windings of the three transformers form a triangular three-phase symmetric load return circuit and the triangular three-phase symmetric load return circuit is connected with an input end of the voltage stabilization chip through a three-phase full-wave rectifier bridge. An output end of the voltage stabilization chip is connected with a supply terminal of the power utilization monitoring circuits. The output end of the voltage stabilization chip is connected with the supply terminal of the power utilization monitoring circuits through a filtering circuit, and is connected with ground through a reverse freewheel diode. The instrument is suitable to be used in power utilization state monitoring of three-phase three-wire system and three-phase four-wire system electric power circuits.
Description
Technical field
The utility model relates to the electric instrument technology, particularly relates to a kind of technology of automatic electricity getting formula three-phase power circuit electricity consumption condition monitoring instrument.
Background technology
As everyone knows, China is a populous nation, and per capita resources is limited.It is reported that account for half many commercial production, especially electrician's equipment manufacture of national energy use amount, a large amount of low usefulness technology still extensively exists, its energy behaviour in service allows of no optimist.In addition, because problem of management particularly in some public electricity-using fields, exists very large energy dissipation.Now country advocate in all trades and professions energetically energy-conservation.In order to reach energy-conservation purpose, at first to monitor various power consumption rich anies influential family, find and to analyze which local energy dissipation serious, just might try every possible means like this to improve efficiency of energy utilization, just might avoid energy dissipation.Therefore, in energy-saving monitoring system, need to come with a lot of electricity consumption condition monitoring instrument the electricity consumption situation of Real-Time Monitoring user side three-phase power circuit.
Traditional electricity consumption condition monitoring instrument all is to adopt independent current source for its power supply, therefore need to lay supply line for it in the measuring instrument mounting points, installs very inconvenient.
In order to overcome defects, it is that power taking comes for the electricity consumption monitoring circuit supply in the instrument from tested power circuit that some electricity consumption condition monitoring instrument are also arranged at present, but these instrument can only be confined to power taking from the power circuit of ad hoc structure, such as can only power taking from the power circuit of three-phase three-wire system, maybe can only power taking from the power circuit of three-phase four-wire system, and these instrument all are the wherein phase circuit power takings from tested three-phase power circuit only, when this phase circuit dead electricity, instrument also can quit work thereupon, and it is still waiting to improve for electrical stability.
The utility model content
For the defective that exists in the above-mentioned prior art, technical problem to be solved in the utility model is a kind of easy for installation, and for the high automatic electricity getting formula three-phase power circuit electricity consumption condition monitoring instrument of electrical stability.
In order to solve the problems of the technologies described above, a kind of automatic electricity getting formula three-phase power circuit electricity consumption condition monitoring instrument provided by the utility model, this instrument is provided with for three live wire access terminals that access respectively tested power circuit three-phase firewire, and be built-in with for the electricity consumption monitoring circuit of monitoring three-phase power circuit electricity consumption situation, it is characterized in that: this instrument is built-in with an electricity-fetching module;
Described electricity-fetching module comprises the voltage stabilizing chip, and three transformers, and described three transformers respectively have a former limit winding, a secondary winding;
The former limit winding of described three transformers is connected into the symmetrical load circuit of an Atria, and three phase line links of the symmetrical load circuit of this Atria are received respectively three live wire access terminals;
The secondary winding of described three transformers is connected into the symmetrical load circuit of an Atria, and three phase line links of the symmetrical load circuit of this Atria are bridged to the input end of voltage stabilizing chip through a three phase full wave rectification;
The output terminal of described voltage stabilizing chip is received the feeder ear of electricity consumption monitoring circuit.
The output terminal of described voltage stabilizing chip is received the feeder ear of electricity consumption monitoring circuit through a filter circuit, and receives ground through a reverse fly-wheel diode.
The automatic electricity getting formula three-phase power circuit electricity consumption condition monitoring instrument that the utility model provides, from the simultaneously power taking of tested power circuit three-phase firewire, need not to lay again supply line when therefore installing, install very conveniently, reduce the workload of site operation, and in the three-phase firewire of tested power circuit, any phase dead electricity, even any two-phase dead electricity, can not affect the normal operation of instrument, it is also higher for electrical stability.
Description of drawings
Fig. 1 is the structural representation of the automatic electricity getting formula three-phase power circuit electricity consumption condition monitoring instrument of the utility model embodiment;
Fig. 2 is the circuit diagram of the electricity-fetching module in the automatic electricity getting formula three-phase power circuit electricity consumption condition monitoring instrument of the utility model embodiment.
Embodiment
Below in conjunction with description of drawings embodiment of the present utility model is described in further detail, but present embodiment is not limited to the utility model, every employing analog structure of the present utility model and similar variation thereof all should be listed protection domain of the present utility model in.
As shown in Figure 1, a kind of automatic electricity getting formula three-phase power circuit electricity consumption condition monitoring instrument that the utility model embodiment provides, this instrument is provided with three live wire access terminals for the three-phase firewire that accesses respectively tested power circuit S2, and be built-in with for the electricity consumption monitoring circuit (not shown) of monitoring three-phase power circuit electricity consumption situation, described three live wires access terminal is respectively A phase firewire access terminal Ua, B phase firewire access terminal Ub, C phase firewire access terminal Uc, and it is characterized in that: this instrument is built-in with an electricity-fetching module S1;
As shown in Figure 2, described electricity-fetching module S1 comprises voltage stabilizing chip U1, reaches three transformer T1, T2, T3, and described three transformer T1, T2, T3 respectively have a former limit winding, a secondary winding;
The former limit winding of described three transformer T1, T2, T3 is connected into the symmetrical load circuit of an Atria, and three phase line links of the symmetrical load circuit of this Atria are received respectively three live wire access terminal Ua, Ub, Uc;
The secondary winding of described three transformer T1, T2, T3 is connected into the symmetrical load circuit of an Atria, and three phase line links of the symmetrical load circuit of this Atria are bridged to the input end Vin of voltage stabilizing chip U1 through a three phase full wave rectification;
The output terminal Output of described voltage stabilizing chip U1 receives the feeder ear of electricity consumption monitoring circuit through a L-type filter circuit, and receives ground through a reverse sustained diode 1.
Among the utility model embodiment, described voltage stabilizing chip is prior art, and its model is LM2596, and described three phase full wave rectification bridge is prior art, and by six commutation diode D2, D3, D4, D5, D6, D7, and a commutation capacitor C1 consists of.
Among the utility model embodiment, described L-type filter circuit is comprised of a filter inductance L1, a filter capacitor C2, and the feedback end Feedback of described voltage stabilizing chip U1 receives described L-type filter circuit; Among other embodiment of the utility model, also can adopt the filter circuit of other structure to substitute the L-type filter circuit, as long as can realize filter function.
The utility model embodiment is applicable to the electricity consumption condition monitoring of three-phase three-wire system power circuit and three-phase four-wire system power circuit.
When the utility model embodiment uses, three live wire access terminals are received respectively the three-phase firewire of tested power circuit S2, three transformer T1, T2, T3 are to convert direct current to by the three phase full wave rectification bridge behind the three-phase low-voltage electricity to be input to voltage stabilizing chip U1 with the three-phase high-voltage transformation of tested power circuit S2, again by voltage stabilizing chip U1, by after the filtering of L-type filter circuit being the electricity consumption monitoring circuit supply in the instrument;
In the three-phase firewire of tested power circuit S2, any phase dead electricity, even any two-phase dead electricity can not affect the normal operation of instrument, if the three-phase firewire of tested power circuit S2 has electricity, then the three phase supply of tested power circuit S2 can play the effect of current-sharing, balance.
Claims (1)
1. automatic electricity getting formula three-phase power circuit electricity consumption condition monitoring instrument, this instrument is provided with for three live wire access terminals that access respectively tested power circuit three-phase firewire, and be built-in with for the electricity consumption monitoring circuit of monitoring three-phase power circuit electricity consumption situation, it is characterized in that: this instrument is built-in with an electricity-fetching module;
Described electricity-fetching module comprises the voltage stabilizing chip, and three transformers, and described three transformers respectively have a former limit winding, a secondary winding;
The former limit winding of described three transformers is connected into the symmetrical load circuit of an Atria, and three phase line links of the symmetrical load circuit of this Atria are received respectively three live wire access terminals;
The secondary winding of described three transformers is connected into the symmetrical load circuit of an Atria, and three phase line links of the symmetrical load circuit of this Atria are bridged to the input end of voltage stabilizing chip through a three phase full wave rectification;
The output terminal of described voltage stabilizing chip is received the feeder ear of electricity consumption monitoring circuit;
The output terminal of described voltage stabilizing chip is received the feeder ear of electricity consumption monitoring circuit through a filter circuit, and receives ground through a reverse fly-wheel diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220500976 CN202794407U (en) | 2012-09-28 | 2012-09-28 | Power utilization state monitoring instrument of self electricity taking three-phase electricity power circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220500976 CN202794407U (en) | 2012-09-28 | 2012-09-28 | Power utilization state monitoring instrument of self electricity taking three-phase electricity power circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202794407U true CN202794407U (en) | 2013-03-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220500976 Expired - Fee Related CN202794407U (en) | 2012-09-28 | 2012-09-28 | Power utilization state monitoring instrument of self electricity taking three-phase electricity power circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN202794407U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103280993A (en) * | 2013-04-24 | 2013-09-04 | 南京懋德智慧能源有限公司 | AC (alternating current) power supply unit of distribution network automation terminal equipment |
-
2012
- 2012-09-28 CN CN 201220500976 patent/CN202794407U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103280993A (en) * | 2013-04-24 | 2013-09-04 | 南京懋德智慧能源有限公司 | AC (alternating current) power supply unit of distribution network automation terminal equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130313 Termination date: 20130928 |