CN203572861U - Automatic double-transformation-ratio conversion device - Google Patents
Automatic double-transformation-ratio conversion device Download PDFInfo
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- CN203572861U CN203572861U CN201320642131.0U CN201320642131U CN203572861U CN 203572861 U CN203572861 U CN 203572861U CN 201320642131 U CN201320642131 U CN 201320642131U CN 203572861 U CN203572861 U CN 203572861U
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- ratio conversion
- transformation
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- automatic double
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Abstract
Aiming to solve defects of operators' large labor intensity, unsafety, inconvenience and low efficiency which exist in present double-transformation-ratio transformers when adjustments are performed during using, the utility model provides an automatic double-transformation-ratio conversion device. The automatic double-transformation-ratio conversion device comprises a box body, a support is fixed in the box body, and metering current transformers and electric energy meters are electrically connected and fixed to the support. The automatic double-transformation-ratio conversion device is characterized in that a double-transformation-ratio control circuit capable of automatically installing and changing is electrically connected between the secondary of each current transformer and the corresponding electric energy meter. Adjustments can be automatically performed by utilizing the automatic double-transformation-ratio conversion device when an electrical load is large or small, indicating accuracy of the electric energy meters are guaranteed, the labor intensity is reduced, and the automatic double-transformation-ratio conversion device is also safe, reliable and high in efficiency. The automatic double-transformation-ratio conversion device is characterized by being simple in structure, low in cost, easy to implement and popularize; and the automatic double-transformation-ratio conversion device is significantly advantageous in that the automatic double-transformation-ratio conversion device can play a protective role when the metering box is overloaded or is in a short-circuit state, accidents that electrical components are burned up are eliminated, and economic losses are reduced.
Description
Technical field
The utility model discloses a kind of automatically two no-load voltage ratio conversion equipment, belong to electric product technical field, is relevant with the electric quantity metering device of metering current mulual inductor concretely.
Background technology
Batch meter be by electric unit for measuring a kind of equipment of electric weight, user according to batch meter show power consumption electricity payment.Known batch meter comprises casing, is fixed with support in casing, is fixed with metering current mulual inductor, the electric energy meter of electrical connection on supporting, and electric energy meter is serially connected in secondary coil the two poles of the earth of current transformer.In actual use, the more than 2/3rds of indication electric degree number are loaded greatly, exceeded to the power consumption of electric power using electricity system to this existing batch meter sometimes; Sometimes load little, lower than below 1/3rd of the normal indication of electric energy meter, make the electric current misregister of electric energy meter.In order to overcome above-mentioned defect, on market, release now a kind of two no-load voltage ratio mutual inductor, this pair of no-load voltage ratio mutual inductor comprises primary coil, secondary coil, at secondary coil, have more a tap, when changing, power consumption need the artificial electric energy meter of adjusting to be connected with the two poles of the earth or the center tap of D.C mutual-inductor secondary coil, for making up the deficiency of electric energy meter indication, thisly by artificial, adjust the defect that method that current transformer tap realizes two no-load voltage ratios conversions in use exists and be: the one, labour intensity is large, and dangerous, inconvenient, efficiency is low.
Summary of the invention
The operative employee's labour intensity when adjusting coil tap in use existing for existing two no-load voltage ratio mutual inductors is large, and dangerous, inconvenient, the low defect of efficiency, the utility model provides a kind of automatic pair of no-load voltage ratio conversion equipment, this automatic pair of no-load voltage ratio conversion equipment can be in power load large or power load hour automatically adjust, the indication that guarantees electric energy meter is accurate, not only reduce labour intensity, and safety, reliable, efficiency is high.
For realizing the purpose of this utility model, taked following technical scheme:
A kind of automatically two no-load voltage ratio conversion equipment, this automatic pair of no-load voltage ratio conversion equipment comprises casing, in casing, be fixed with support, on supporting, be fixed with metering current mulual inductor, the electric energy meter of electrical connection, it is characterized in that being electrically connected with the two no-load voltage ratio control loops that can automatic mounting change between the secondary and electric energy meter of current transformer.
Described two no-load voltage ratio control loops comprise power circuit, power supply test section, the operating part being electrically connected with power supply test section.
Described power circuit comprises prime filter capacitor, the voltage stabilizing diode, adjustable resistance and the bridge rectifier that are electrically connected with prime filter capacitor.
Described power supply test section comprises voltage stabilizing diode, the relay of connecting with voltage stabilizing diode, the filter capacitor in parallel with relay.
Described operating part comprises the contact of relay, and relay contact is connected in electric energy meter and the secondary center tap of current transformer.
Feature of the present utility model be simple in structure, easy realization, cost low, be easy to promote, its remarkable advantage is when batch meter overload or short circuit, to play defencive function, the accident of stopping to burn electrical equipment occurs, and reduces economic loss.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, further describe technical characterictic of the present utility model:
Fig. 1, the utility model remove the physical construction schematic diagram of outer casing door;
The electric theory structure schematic diagram of Fig. 2, embodiment Fig. 1.
In figure: 1, shell 2, electric energy meter 3, the two no-load voltage ratio control loops 4, current transformer C1, prime filter capacitor C, filter capacitor RW1 \ RW2, bi-directional voltage stabilizing pipe RW3, stabilivolt RW4, stabilivolt R0, resistance R 1, divider resistance R2, adjustable resistance R3, voltage regulation resistance KA1, relay K A2, relay K A3, the relay that can automatic mounting change
Embodiment
As shown in Figure 1 and Figure 2, in figure 1 is the shell of batch meter, in shell 1, be fixed with electric energy meter 2, the current transformer 4 of electrical connection, the utility model is between the secondary and electric energy meter 2 of current transformer 4, to be electrically connected with the two no-load voltage ratio control loops that can automatic mounting change.These two no-load voltage ratio control loops that can automatic mounting change comprise the power circuit of the prime filter capacitor C1, bi-directional voltage stabilizing pipe RW1 \ RW2, divider resistance R1, adjustable resistance R2 and the bridge rectifier circuit composition that are connected with current transformer 4 secondary electrical; At the output terminal of bridge rectifier, be electrically connected with voltage stabilizing diode RW4, capacitor C, relay K A1 overvoltage detection loop; The voltage stabilizing diode RW3 connecting with the adjustable resistance R0 of voltage stabilizing diode RW4 parallel connection, with adjustable resistance R0, the superpressure that relay K A2 makes detect loop, be subject to the contact triggered relay K A3 of relay K A1, KA2, contact KA3-1, the KA3-2 of relay K A3 is parallel to the execution loop of making between the center tap of electric energy meter A and mutual inductor.
When the load hour of electrical network, voltage is through resistance R 0 to relay K A2, and relay K A2 moves, and is connected in the normally opened contact KA2-1 closure of the relay K A2 of relay K A3, and relay K A3 is failure to actuate, normal operation circuit; When voltage raises when exceeding certain value voltage stabilizing diode RW3 being punctured, relay K A2 disconnects, the normally closed contact relay K A2-1 closure of relay K A2, and because of the now normally closed contact relay K A1-1 disconnection of relay K A1, relay K A3 is still failure to actuate; Networking voltage continues to rise to too high while making stabilivolt RW4 conducting, relay K A1 action, and normal battle of the KA1-1 closure of relay K A1, relay K A3 action, the normally opened contact KA3-3 closure of relay K A3 makes relay K A3 self-locking; The normally opened contact KA3-1 of relay K A3 disconnects with the center tap of A.C. contactor secondary coil and contacts publicly, converts large velocity ratio operation to.The resistance of adjusting resistance R0 and resistance R 2, can change the threshold values that current converts.
Claims (5)
1. an automatically two no-load voltage ratio conversion equipment, this automatic pair of no-load voltage ratio conversion equipment comprises casing (1), in casing (1), be fixed with support, on supporting, be fixed with current transformer (4), the electric energy meter (2) of electrical connection, it is characterized in that: described automatically two no-load voltage ratio conversion equipments are between the secondary and electric energy meter (2) of current transformer (4), to be electrically connected with the two no-load voltage ratio control loops that can automatic mounting change.
2. by automatic pair of no-load voltage ratio conversion equipment claimed in claim 1, it is characterized in that: described two no-load voltage ratio control loops comprise power circuit, test section, the operating part being electrically connected with power supply test section.
3. by automatic pair of no-load voltage ratio conversion equipment claimed in claim 2, it is characterized in that: described power circuit comprises prime filter capacitor (C1) the voltage stabilizing diode bi-directional voltage stabilizing pipe RW1 \ RW2, adjustable resistance R2, divider resistance R1 and the bridge rectifier that are electrically connected with prime filter capacitor (C1).
4. by automatic pair of no-load voltage ratio conversion equipment claimed in claim 2, it is characterized in that: described power supply test section comprises voltage stabilizing diode RW4, relay K A1, the filter capacitor C connecting with voltage stabilizing diode RW4 with bridge rectifier electrical connection; The relay K A2, the voltage stabilizing diode RW3 that with the resistance R 0 of voltage stabilizing diode RW4 parallel connection, with resistance R 0, connect.
5. by automatic pair of no-load voltage ratio conversion equipment claimed in claim 2, it is characterized in that: described operating part comprises relay K A3 and contact thereof, the contact of relay K A3 is connected in electric energy meter (2) center tap secondary with current transformer (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320642131.0U CN203572861U (en) | 2013-10-11 | 2013-10-11 | Automatic double-transformation-ratio conversion device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320642131.0U CN203572861U (en) | 2013-10-11 | 2013-10-11 | Automatic double-transformation-ratio conversion device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203572861U true CN203572861U (en) | 2014-04-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320642131.0U Expired - Fee Related CN203572861U (en) | 2013-10-11 | 2013-10-11 | Automatic double-transformation-ratio conversion device |
Country Status (1)
| Country | Link |
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| CN (1) | CN203572861U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104466992A (en) * | 2014-12-31 | 2015-03-25 | 山东蓝天电能科技有限公司 | Chained SVG chain link control system and method |
| CN104991482A (en) * | 2015-05-04 | 2015-10-21 | 保定双寅电气有限公司 | Dual transformation ratio metering intelligent controlling device and control mode thereof |
| CN112802675A (en) * | 2020-12-30 | 2021-05-14 | 安徽一天电能质量技术有限公司 | Double-transformation-ratio manual automatic switching current transformer and control method thereof |
| CN114002495A (en) * | 2021-11-04 | 2022-02-01 | 广东电网有限责任公司 | Variable flow monitoring device |
-
2013
- 2013-10-11 CN CN201320642131.0U patent/CN203572861U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104466992A (en) * | 2014-12-31 | 2015-03-25 | 山东蓝天电能科技有限公司 | Chained SVG chain link control system and method |
| CN104991482A (en) * | 2015-05-04 | 2015-10-21 | 保定双寅电气有限公司 | Dual transformation ratio metering intelligent controlling device and control mode thereof |
| CN104991482B (en) * | 2015-05-04 | 2017-10-17 | 保定双寅电气有限公司 | Double no-load voltage ratio metering intelligent controlling devices and its control mode |
| CN112802675A (en) * | 2020-12-30 | 2021-05-14 | 安徽一天电能质量技术有限公司 | Double-transformation-ratio manual automatic switching current transformer and control method thereof |
| CN114002495A (en) * | 2021-11-04 | 2022-02-01 | 广东电网有限责任公司 | Variable flow monitoring device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice |
Addressee: Henan Yuguan Power Equipment Limited Co., Ltd. Document name: Notification of Termination of Patent Right |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140430 Termination date: 20151011 |
|
| EXPY | Termination of patent right or utility model |