CN201465783U - Power current transformer with temperature rise detecting function - Google Patents
Power current transformer with temperature rise detecting function Download PDFInfo
- Publication number
- CN201465783U CN201465783U CN2009200339335U CN200920033933U CN201465783U CN 201465783 U CN201465783 U CN 201465783U CN 2009200339335 U CN2009200339335 U CN 2009200339335U CN 200920033933 U CN200920033933 U CN 200920033933U CN 201465783 U CN201465783 U CN 201465783U
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- current transformer
- power current
- temperature sensor
- temperature rise
- temperature
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Abstract
The utility model relates to field of the manufacturing and the temperature risk detection of power current transformers, and discloses a power current transformer with a temperature rise detecting function, which comprise an energy taking coil on the secondary side of the current transformer, a rectification circuit connected with the output end of the energy taking coil, and a temperature sensor wrapped on the outer wall of the iron core of the power current transformer; and the rectification circuit supplies power to the temperature sensor, and the output end of the temperature sensor is connected with an leading-out terminal of a secondary leading-out box.
Description
Technical field
The utility model relates to the manufacturing and the temperature rise detection range of power current transformer, particularly a kind of power current transformer with built-in temperature rise measuring ability.
Background technology
Can raise owing to reasons such as fault or overload cause the secondary coil temperature in the high-tension electricity current transformer running, can quicken ageing of insulation, even cause internal pressure excessive and explosion takes place if develop as one pleases.The temperature rise of high pressure equipment such as power current transformer detects the general infrared observation that adopts, and is applied in electric power and carries electricity on-the-spot.The temperature of infrared observation is the external temperature of power current transformer, and the reason that causes the operation conditions deterioration of high-tension apparatus comes from internal temperature, therefore, infrared observation is indirect detection to the temperature rise detection of power current transformer, the actual operating state of power current transformer can not be truly reacted in existence rapidly, and investment is big, expense is high.
Summary of the invention
The purpose of this utility model is a kind of power current transformer with built-in temperature rise measuring ability, can the real time on-line monitoring power current transformer, its actual internal operation situation of actual response, can fast reaction raise, avoid the too high and explosion accident that causes of Yin Wendu owing to reasons such as fault or overload cause the temperature of secondary coil.
In order to achieve the above object, the utility model is achieved by the following technical solutions.
A kind of power current transformer with built-in temperature rise measuring ability, it is characterized in that, comprise be arranged on getting of Current Transformer Secondary side can coil, connect get can the coil output rectification circuit, surround the temperature sensor of power current transformer outer wall unshakable in one's determination; Described rectification circuit provides power supply to temperature sensor, and the temperature sensor output is connected on the outlet terminal of secondary outlet box.
The further characteristics of technique scheme are: described temperature sensor surrounds outer wall unshakable in one's determination by the terylene silk ribbon; Described rectification circuit is arranged in the secondary outlet box; Described temperature sensor is LM35.
The utility model is surrounded with the temperature sensor of measuring its internal temperature rise in power current transformer inside, the power supply of temperature sensor directly can provide through after the rectification by coil by being arranged on getting of power current transformer secondary side, there be not of the interference of the extraneous signal of telecommunication to the power current transformer internal performance, therefore, on the basis that keeps the original performance of power current transformer, realize the measuring ability of its internal temperature rise easily, eliminated the defective of electric power system indirect detection.
Description of drawings
Fig. 1 is the structural representation with inverted power current transformer of built-in temperature rise measuring ability;
Fig. 2 is the structural representation with just vertical power current transformer of built-in temperature rise measuring ability;
Fig. 3 is the operating circuit schematic diagram of temperature sensor.
Specific embodiments
With reference to Fig. 1, for inverted power current transformer, being equipped with successively in the cover 4 unshakable in one's determination that two groups of secondary coils 1 and one group gets can coil 3, every group of coil winding is on the iron core of annular, its lead-in wire causes on the outlet terminal of secondary outlet box 7 by secondary lead wires pipe 6. when coiling is positioned at middle secondary coil 1, after the core inductance wrapping is finished, temperature sensor 2 usefulness terylene silk ribbons being surrounded the top of outer wall unshakable in one's determination. temperature sensor 2 is LM35, its input and output lead-out wire leads on the outlet terminal 8 of secondary outlet box 7 from secondary lead wires pipe 6 after shielding. and primary conductive bar 5 runs through the iron core of corresponding three annulars of three groups of coils, and stretch out outside the cover 4 unshakable in one's determination primary conductive bar 5 and cover 4 insulation unshakable in one's determination.
With reference to Fig. 2,, during the superposed secondary coil 1 of coiling, after the core inductance wrapping is finished, temperature sensor 2 usefulness terylene silk ribbons are surrounded the upper end of outer wall unshakable in one's determination for just vertical power current transformer.Temperature sensor 2 is LM35, and its signal lead-out wire leads on the outlet terminal 8 of secondary outlet box 7 from the secondary lead wires pipe after shielding.
With reference to Fig. 3, get the energy coil for one group that sets up in current transformer device inside, according to primary side current and secondary output current determine to get can coil turn ratio, with the primary side current is 1200A, and one time the number of turn 1 circle is an example, and the setting secondary current is 5A, the specified 50VA that is output as, then the secondary side number of turn is 240 circles, adopts QQ-2 φ 2.23 enamel insulated round copper wire evenly around full 240 circles, and core dimensions is φ 220/ φ 380 * 35mm.The lead-out terminal of getting the energy coil is connected with full-wave rectification bridge, after reactance L and capacitor C filtering, its output remains on (8-12V) about 10V, power supply as temperature sensor LM35, temperature sensor LM35DE output voltage signal can directly send the analog or digital instrument to, or conversion is connected with control device through A/D.
Claims (4)
1. power current transformer with built-in temperature rise measuring ability, it is characterized in that, comprise be arranged on getting of Current Transformer Secondary side can coil, connect get can the coil output rectification circuit, surround the temperature sensor of power current transformer outer wall unshakable in one's determination; Described rectification circuit provides power supply to temperature sensor, and the temperature sensor output is connected on the outlet terminal of secondary outlet box.
2. a kind of power current transformer with built-in temperature rise measuring ability according to claim 1 is characterized in that described temperature sensor surrounds outer wall unshakable in one's determination by the terylene silk ribbon.
3. a kind of power current transformer with built-in temperature rise measuring ability according to claim 1 is characterized in that described rectification circuit is arranged in the secondary outlet box.
4. a kind of power current transformer with built-in temperature rise measuring ability according to claim 1 is characterized in that described temperature sensor is LM35.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200339335U CN201465783U (en) | 2009-07-17 | 2009-07-17 | Power current transformer with temperature rise detecting function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200339335U CN201465783U (en) | 2009-07-17 | 2009-07-17 | Power current transformer with temperature rise detecting function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201465783U true CN201465783U (en) | 2010-05-12 |
Family
ID=42393131
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200339335U Expired - Lifetime CN201465783U (en) | 2009-07-17 | 2009-07-17 | Power current transformer with temperature rise detecting function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201465783U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106653337A (en) * | 2016-12-21 | 2017-05-10 | 山东华信电气股份有限公司 | Sleeve current transformer |
| CN110286265A (en) * | 2019-07-24 | 2019-09-27 | 四川电器集团股份有限公司 | Contact arm measure annular device for vacuum circuit breaker |
-
2009
- 2009-07-17 CN CN2009200339335U patent/CN201465783U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106653337A (en) * | 2016-12-21 | 2017-05-10 | 山东华信电气股份有限公司 | Sleeve current transformer |
| CN110286265A (en) * | 2019-07-24 | 2019-09-27 | 四川电器集团股份有限公司 | Contact arm measure annular device for vacuum circuit breaker |
| CN110286265B (en) * | 2019-07-24 | 2024-05-10 | 河北杰能电气设备有限公司 | Contact arm measuring ring device for vacuum circuit breaker |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100512 |
|
| CX01 | Expiry of patent term |