CN202275711U - Voltage relief type combined mutual inductor - Google Patents
Voltage relief type combined mutual inductor Download PDFInfo
- Publication number
- CN202275711U CN202275711U CN2011204123977U CN201120412397U CN202275711U CN 202275711 U CN202275711 U CN 202275711U CN 2011204123977 U CN2011204123977 U CN 2011204123977U CN 201120412397 U CN201120412397 U CN 201120412397U CN 202275711 U CN202275711 U CN 202275711U
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- China
- Prior art keywords
- voltage
- pressure
- transformer
- transformers
- relief valve
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a voltage relief type combined transformer which comprises two groups of current transformers, two groups of voltage transformers and two high-voltage relief valves, wherein, the high-voltage relief valves are respectively connected in parallel with the primary sides of the current transformers and the primary sides of the voltage transformers; and each high-voltage relief valve is respectively connected in parallel with the primary side of one of the two groups of current transformers and the primary side of one of the two groups of voltage transformers. When the combined transformer is in use, and the switching overvoltage of the current transformers and the voltage transformers or a thunderbolt reaches a voltage about more than 1.7 times of the rated operational voltage, the high-voltage relief valves act so as to reduce the high voltage, thereby realizing the metering of high voltage electricity, ensuring the safety of the equipment, improving the power supply stability, and potently guaranteeing the normal work of the transformer.
Description
Technical field
The utility model relates to a kind of combination transformer, relates in particular to the pressure-releasing type combination transformer that a kind of extra-high pressure through unloading instrument transformer two ends reaches protection instrument transformer purpose.
Background technology
Current transformer and voltage transformer are widely used in one-shot measurement and control in electric power system, current transformer and voltage transformer extract electric current, voltage signal is given kilowatt-hour meter, thereby carry out accurate measurement.
Present electric power general headquarters on the market are used for the combined instrument transformer of 10KV high pressure measurement; There is not the high pressure pressure relief device, in use, owing to switching overvoltage (like the overvoltage that produces because of divide-shut brake), internal overvoltage (producing resonance overvoltage), the high-tension existence such as (summer, thunderstorm season were more) of thunderbolt voltage like the 10KV line system; Very easily burnt; Even accident such as product blast takes place, and cause power outage, have a strong impact on the stable of supply of electric power.
Summary of the invention
The purpose of the utility model provides a kind of pressure-releasing type combination transformer with regard to being in order to address the above problem
The utility model is realized above-mentioned purpose through following technical scheme:
The utility model comprises many group current transformers, organizes voltage transformer and high pressure pressure-relief valve more, and said high pressure pressure-relief valve is connected in parallel with the primary side of said current transformer and the primary side of said voltage transformer respectively.
In the use, when the switching overvoltage of current transformer or voltage transformer or thunder and lightning reach its rated operational voltage more than 1.7 times the time, the action of high pressure pressure-relief valve, thus lay down high voltage.
Further, said high pressure pressure-relief valve is two, and said current transformer and said voltage transformer are two groups, and each said high pressure pressure-relief valve is connected in parallel with the primary side of one group of said current transformer and the primary side of one group of said voltage transformer respectively.
Further, said high pressure pressure-relief valve is the superpressure short-circuit protector; Also be provided with malfunction indicator lamp on the said high pressure pressure-relief valve.
The beneficial effect of the utility model is:
The utility model in use; When the switching overvoltage of current transformer or voltage transformer or thunder and lightning reach its rated operational voltage more than 1.7 times the time, high voltage is laid down in the action of high pressure pressure-relief valve; When realizing high-voltage power metering; Strong guarantee the safety of equipment itself, improved the stability of power supply, effectively ensured the operate as normal of instrument transformer.
Description of drawings
Fig. 1 is the internal structure sketch map of the utility model;
Fig. 2 is the external structure sketch map of the utility model.
Embodiment
Below in conjunction with accompanying drawing the utility model is described further:
As shown in Figure 1, the utility model comprises two groups of current transformers 1, two groups of voltage transformers 2 and two high pressure pressure-relief valves 3, and each high pressure pressure-relief valve 3 is connected in parallel with the primary side of one group of current transformer 1 and the primary side of one group of voltage transformer 2 respectively.Two groups of voltage transformers 2 are adjacent and place the centre of two groups of current transformers 1, each high pressure pressure-relief valve 3 all to place between one group of voltage transformer 2 and the one group of current transformer.
As shown in Figure 1, high pressure pressure-relief valve 3 is the superpressure short-circuit protector; Also be provided with the malfunction indicator lamp (not shown) on the high pressure pressure-relief valve 3.
As shown in Figure 2, the utility model outside is a dry type batch meter 9, relies on left foot frame 6 and 7 load-bearing of right crus of diaphragm frame, and external lead-in wire is connected with connecting line through the binding post in the terminal box 8.
In conjunction with Fig. 1 and Fig. 2, in the use, when normally moving, high pressure pressure-relief valve 3 leakage currents are minimum, are high-impedance state.Because leakage current is minimum, less than 1mA, can ignore to this loop protection operating value and the influence of the accurate precision of table meter, high pressure pressure-relief valve 3 is not worked at this moment.When the first side winding voltage of voltage transformer 2 or current transformer 1 is higher than normal working voltage certain limit (be higher than rated voltage 1.7 times); High pressure pressure-relief valve 3 can be laid down high pressure in the short time that overvoltage produces reliably at this moment; Voltage is limited in below the set point value effectively; Thereby thoroughly avoided the overvoltage injuries such as equipment burnout that cause because of overvoltage, realized the stability of power supply.
The utility model can be widely used in the high pressure measurement in the 10KV electric power system; Also can be used for the 10KV switch; Power distribution cabinet provides electric current, information of voltage to pass to measuring instrument, instrument and relaying protection, control device, avoids equipment to receive overvoltage injury through the utility model.
Claims (3)
1. pressure-releasing type combination transformer; Comprise many group current transformers and many group voltage transformers; It is characterized in that: also comprise the high pressure pressure-relief valve, said high pressure pressure-relief valve is connected in parallel with the primary side of said current transformer and the primary side of said voltage transformer respectively.
2. pressure-releasing type combination transformer according to claim 1; It is characterized in that: said high pressure pressure-relief valve is two; Said current transformer and said voltage transformer are two groups, and each said high pressure pressure-relief valve is connected in parallel with the primary side of one group of said current transformer and the primary side of one group of said voltage transformer respectively.
3. pressure-releasing type combination transformer according to claim 1 and 2 is characterized in that: said high pressure pressure-relief valve is the superpressure short-circuit protector; Also be provided with malfunction indicator lamp on the said high pressure pressure-relief valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204123977U CN202275711U (en) | 2011-10-26 | 2011-10-26 | Voltage relief type combined mutual inductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204123977U CN202275711U (en) | 2011-10-26 | 2011-10-26 | Voltage relief type combined mutual inductor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202275711U true CN202275711U (en) | 2012-06-13 |
Family
ID=46196055
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204123977U Expired - Fee Related CN202275711U (en) | 2011-10-26 | 2011-10-26 | Voltage relief type combined mutual inductor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202275711U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111917035A (en) * | 2020-07-13 | 2020-11-10 | 吕纪兴 | High-voltage power cabinet that radiating effect is good |
-
2011
- 2011-10-26 CN CN2011204123977U patent/CN202275711U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111917035A (en) * | 2020-07-13 | 2020-11-10 | 吕纪兴 | High-voltage power cabinet that radiating effect is good |
| CN111917035B (en) * | 2020-07-13 | 2022-03-01 | 广东中盛纳科技有限公司 | High-voltage power cabinet that radiating effect is good |
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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: 20120613 Termination date: 20131026 |