CN201311836Y - Electronic voltage transformer - Google Patents
Electronic voltage transformer Download PDFInfo
- Publication number
- CN201311836Y CN201311836Y CNU2008201461490U CN200820146149U CN201311836Y CN 201311836 Y CN201311836 Y CN 201311836Y CN U2008201461490 U CNU2008201461490 U CN U2008201461490U CN 200820146149 U CN200820146149 U CN 200820146149U CN 201311836 Y CN201311836 Y CN 201311836Y
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- voltage
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- auxiliary circuit
- resistance
- arm resistance
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Abstract
The utility model discloses an electronic voltage transformer for voltage measurement and relay protection in the technical field of power electronics, which comprises a high voltage terminal, a grounded terminal, an insulator, a transformer body embedded in the insulator and an auxiliary circuit, wherein the auxiliary circuit comprises a capacitor, a trimmer variable capacitor, a resistor and a trimmer variable resistor which are sequentially connected with each other, the other end of the capacitor is in parallel connection with one end of a low-voltage arm resistor which is connected with a self-recovery transient voltage suppressor in parallel, the other end of the trimmer variable resistor is connected with the grounded terminal. The electronic voltage transformer can be directly connected with a microcomputer measurement protecting device, which has the advantages of small volume, light weight and fine linearity, precision meeting accuracy class of 0.2, and low power voltage signal output with the measuring range ranging from 80% Un to 120% Un.
Description
Technical field
The utility model relates to voltage measurement and the protective relaying device in a kind of electric and electronic technical field, particularly relates to a kind of electronic type voltage transformer.
Background technology
For a long time, in High-Voltage Electrical Appliances complete set of equipments and electrical network, obtain measurement, guard signal by electromagnetic type electric current, voltage transformer, this method mainly contains following several shortcoming:
(1) requirement of traditional electromechanical relay (is wanted the electric current of output AC 5A or 1A as current transformer; And voltage transformer requires the voltage of output AC 100V), therefore this current transformer and voltage transformer then need bigger power input, so power loss is big, volume is also big;
(2) along with the raising of transmission voltage grade, for guaranteeing good insulation and precision, traditional electric current, voltage transformer volume and cost can be multiplied, thereby have caused heavy expensive with valency;
(3) measure use occasion and require the signal transmission that enough precision and capacity are arranged, and require signal to have big dynamic range in the protection occasion;
(4) electromagnetic potential transformer is easy to generate ferro resonance because of the nonlinear characteristic of iron core, causes to measure inaccurate and cause the damage of voltage transformer.
These shortcomings of electromagnetic potential transformer have restricted electric system and have developed to intellectuality, networking, digitlization, device miniaturization and multifunction direction.
The utility model content
The purpose of this utility model is to overcome above-mentioned shortcoming, provides that a kind of volume is little, in light weight, measuring range is wide, precision is high, the electronic type voltage transformer that can directly connect with the microcomputer measurement protective device.
For achieving the above object, the utility model adopts following structure:
A kind of electronic type voltage transformer, comprise high-pressure side, earth terminal, insulator, embed current transformer body and auxiliary circuit in the insulator, current transformer body is by high-tension shielding electrode and low pressure bucking electrode, be arranged on the high-voltage arm resistance between high-tension shielding electrode and the low pressure bucking electrode, low-voltage arm resistance reaches from recovering Transient Voltage Suppressor to be formed, high-voltage arm resistance one termination high-pressure side, low-voltage arm resistance with from recover Transient Voltage Suppressor in parallel after the termination high-voltage arm resistance other end and an auxiliary circuit, in parallel back another termination earth terminal and auxiliary circuit, wherein, the circuit of described auxiliary circuit is finely tuned variable capacitance, resistance by electric capacity, the fine setting variable resistor connects successively, the other end of electric capacity and low-voltage arm resistance are connected with a end after recovering the Transient Voltage Suppressor parallel connection, finely tune variable-resistance another termination earth terminal.
Aforesaid electronic type voltage transformer, wherein, described high-tension shielding electrode is arranged between high-pressure side and the high-voltage arm resistance, and the low pressure bucking electrode is arranged on low resistance, recovers between Transient Voltage Suppressor and the earth terminal certainly.
The beneficial effects of the utility model are to realize that volume is little, in light weight; measuring range is 80%-120%Un, and the linearity is good, and precision can reach 0.2 class of accuracy; output low-power voltage signal, the electronic type voltage transformer that can directly be connected with the microcomputer measurement protective device.
Description of drawings
Fig. 1 is the utility model structural representation;
Fig. 2 is the utility model circuit structure diagram.
The primary clustering symbol description:
1-high-pressure side 2-earth terminal 3-insulator 4-high-tension shielding electrode 5-low pressure bucking electrode 6-high-voltage arm resistance 7-low-voltage arm resistance 8-is from recovering Transient Voltage Suppressor 9-auxiliary circuit 10-aviation plug
Embodiment
As shown in Figure 1, the utility model electronic type voltage transformer comprises high-pressure side 1, earth terminal 2, insulator 3, embed current transformer body and auxiliary circuit 9 in the insulator 3, current transformer body is by high-tension shielding electrode 4 and low pressure bucking electrode 5, be arranged on the high-voltage arm resistance 6 between high-tension shielding electrode 4 and the low pressure bucking electrode 5, low-voltage arm resistance 7 reaches from recovering Transient Voltage Suppressor 8 to be formed, high-voltage arm resistance 6 one termination high-pressure sides 1, low-voltage arm resistance 7 is recovered Transient Voltage Suppressor 8 backs in parallel one termination high-voltage arm resistance 6 other ends and auxiliary circuit 9, another termination earth terminal 2 of back in parallel and auxiliary circuit 9 with oneself.
As shown in Figure 2, the circuit structure of the utility model electronic type voltage transformer comprises high-pressure side 1, earth terminal 2, current transformer body circuit and auxiliary circuit 9, the current transformer body circuit is by high-voltage arm resistance 6, low-voltage arm resistance 7 reaches from recovering Transient Voltage Suppressor 8 to be formed, high-voltage arm resistance 6 one termination high-pressure sides 1, low-voltage arm resistance 7 is recovered Transient Voltage Suppressor 8 backs in parallel one termination high-voltage arm resistance 6 other ends and auxiliary circuit 9 with oneself, another termination earth terminal 2 of back in parallel and auxiliary circuit 9, auxiliary circuit 9 is by capacitor C, fine setting variable capacitance WC, resistance R, fine setting variable resistor WR connects successively, and the other end of capacitor C and low-voltage arm resistance 7 are connected with a end after recovering Transient Voltage Suppressor 8 parallel connections, finely tune another termination earth terminal 2 of variable resistor WR.
Operation principle of the present utility model is: one time high voltage is added on the high-pressure side 1; carry out dividing potential drop through high-voltage arm resistance 6 and low-voltage arm resistance 7; obtain a very low voltage from low-voltage arm resistance 7; adjust again through auxiliary circuit 9; export a low voltage signal that becomes linear dependence with a sub-high pressure; this low voltage signal is delivered to the signal acquisition process unit through secondary singal output multiple twin shielding conductor (not shown) and aviation plug 10, in order to voltage measurement and enforcement microcomputer protective relay.The operation principle of auxiliary circuit 9 is to finely tune variable resistor WR and fine setting variable capacitance WC by regulating, and the low voltage signal that the current transformer body circuit is exported carries out amplitude and phase compensation.
Claims (2)
1, a kind of electronic type voltage transformer, comprise high-pressure side, earth terminal, insulator, embed current transformer body and auxiliary circuit in the insulator, current transformer body is by high-tension shielding electrode and low pressure bucking electrode, be arranged on the high-voltage arm resistance between high-tension shielding electrode and the low pressure bucking electrode, low-voltage arm resistance reaches from recovering Transient Voltage Suppressor to be formed, high-voltage arm resistance one termination high-pressure side, low-voltage arm resistance with from recover Transient Voltage Suppressor in parallel after the termination high-voltage arm resistance other end and an auxiliary circuit, another termination earth terminal and auxiliary circuit after in parallel, it is characterized in that: the circuit of auxiliary circuit is by electric capacity, the fine setting variable capacitance, resistance, the fine setting variable resistor connects successively, and the other end of electric capacity and low-voltage arm resistance are connected with a end after oneself recovers the Transient Voltage Suppressor parallel connection, finely tune variable-resistance another termination earth terminal.
2, electronic type voltage transformer according to claim 1, it is characterized in that: described high-tension shielding electrode is arranged between high-pressure side and the high-voltage arm resistance, and the low pressure bucking electrode is arranged on low resistance, recovers between Transient Voltage Suppressor and the earth terminal certainly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201461490U CN201311836Y (en) | 2008-11-05 | 2008-11-05 | Electronic voltage transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201461490U CN201311836Y (en) | 2008-11-05 | 2008-11-05 | Electronic voltage transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201311836Y true CN201311836Y (en) | 2009-09-16 |
Family
ID=41109093
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201461490U Expired - Fee Related CN201311836Y (en) | 2008-11-05 | 2008-11-05 | Electronic voltage transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201311836Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103187158A (en) * | 2011-12-30 | 2013-07-03 | 陈永山 | Electronic type voltage transformer |
| CN106469601A (en) * | 2016-09-28 | 2017-03-01 | 江苏靖江互感器股份有限公司 | A kind of controller switching equipment is with one or two fusion threephase potential transformers |
| CN110068718A (en) * | 2019-05-30 | 2019-07-30 | 山东联合电力技术有限公司 | A kind of electronic mutual inductor of electric resistance partial pressure |
-
2008
- 2008-11-05 CN CNU2008201461490U patent/CN201311836Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103187158A (en) * | 2011-12-30 | 2013-07-03 | 陈永山 | Electronic type voltage transformer |
| CN103187158B (en) * | 2011-12-30 | 2016-12-21 | 陈永山 | A kind of electronic type voltage transformer |
| CN106469601A (en) * | 2016-09-28 | 2017-03-01 | 江苏靖江互感器股份有限公司 | A kind of controller switching equipment is with one or two fusion threephase potential transformers |
| CN110068718A (en) * | 2019-05-30 | 2019-07-30 | 山东联合电力技术有限公司 | A kind of electronic mutual inductor of electric resistance partial pressure |
| CN110068718B (en) * | 2019-05-30 | 2022-01-04 | 山东联合电力产业发展有限公司 | Electronic transformer with resistance voltage division function |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090916 Termination date: 20171105 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |