CN201368774Y - Complete set of switch apparatus state on-line monitoring device - Google Patents
Complete set of switch apparatus state on-line monitoring device Download PDFInfo
- Publication number
- CN201368774Y CN201368774Y CNU2008201290459U CN200820129045U CN201368774Y CN 201368774 Y CN201368774 Y CN 201368774Y CN U2008201290459 U CNU2008201290459 U CN U2008201290459U CN 200820129045 U CN200820129045 U CN 200820129045U CN 201368774 Y CN201368774 Y CN 201368774Y
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- temperature sensor
- monitoring device
- signal
- line monitoring
- temperature
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Abstract
The utility model relates to a complete set of switch apparatus state on-line monitoring device which comprises an insulating sleeve sleeved on a high-voltage inlet wire in a switch cabinet, wherein a drainage ring of a current flow mutual inductor is sleeved on the insulating sleeve, the power output end of the current flow mutual inductor is connected with the power end of a temperature sensor, the temperature sensor is arranged on the wiring position in the switch cabinet, the output end of the temperature sensor is connected with the signal input end of a signal amplifying circuit through double shielding cables, and the signal output end of the signal amplifying circuit is connected with the temperature checking signal output input end of a central control unit. The utility model adopts the current flow mutual inductor as a front power supply of the temperature sensor, and the temperature sensor monitors the temperature on the wiring position in the switch cabinet especially the eclectically connecting position of buses in time. Compared with an infrared ray checking method, the on-line monitoring device has better reliability.
Description
Technical field
The utility model relates to a kind of switchgear assembly state on_line monitoring device.
Background technology
Because the development of sensing technology and microprocessing, can carry out continuum of states to operating power equipment detects, at any time record the information that status of equipment changes, carry out after the analyzing and processing state of insulation being made diagnosis, determine maintenance program according to diagnostic result, accomplish to keep in repair targetedly, i.e. state maintenance.
Chinese patent literature notification number 2847408 discloses a kind of on-line temperature monitoring system of electric system, and it comprises infrared temperature sensor, logging, and serial server and industrial computer, infrared temperature sensor is connected with logging by shielded cable; Logging is connected with serial server by shielded cable; Serial server is connected with industrial computer by netting twine.
Above-mentioned the deficiencies in the prior art part is: the reliability of infrared temperature sensor is lower, is subject to the influence of outside various factors.
The utility model content
Technical problem to be solved in the utility model provides a kind of reliability switchgear assembly state on_line monitoring device preferably.
For solving the problems of the technologies described above, the utility model provides a kind of switchgear assembly state on_line monitoring device, comprising: be placed in the insulating sleeve on the high pressure inlet wire in the switch cubicle, be with the drainage ring of current transformer on the insulating sleeve; The power output end of current transformer links to each other with the power end of a temperature sensor, and this temperature sensor is located at wiring place in the switch cubicle; The output terminal of temperature sensor links to each other with the signal input part of signal amplification circuit through screened cable, the opening of thermal source shielded-plate tube and described tested wiring place are oppositely arranged, and the signal output part of signal amplification circuit is exported into end with the temperature detection signal of central control unit and linked to each other.
Described temperature sensor adopts thermopile detector, thermopile detector is located in the thermal source shield shell, the front end of thermal source shield shell is provided with the thermal source shielded-plate tube, the temperature detecting part 3-2 of thermopile detector is located in the thermal source shielded-plate tube, and the temperature signal output terminal of thermopile detector is the output terminal of temperature sensor.From inside to outside be wrapped with magnetic masking layer, insulation course and electric shield layer on the described screened cable successively.
Described electric shield layer adopts the thick copper product of 2mm at least, and insulation course adopts the permalloy material that 1mm is thick at least, and magnetic masking layer adopts the iron sheet of the high-saturation magnetic induction density that 1mm is thick at least.
The inductive coil of described current transformer is around on the drainage ring, and the output terminal of inductive coil is provided with finishing circuit, and the current output terminal of this finishing circuit is provided with voltage stabilizer, and the dc output end of voltage stabilizer is the power output end of described current transformer.
The utlity model has positive effect: (1) switchgear assembly state on_line monitoring of the present utility model device, adopt the front end power supply of current transformer as temperature sensor, temperature sensor is to wiring place in the switch cubicle, especially bus electrical connection place temperature is monitored in real time, with respect to the infrared detection method, reliability is better.(2) in the utility model, temperature sensor adopts thermopile detector, thermopile detector is located in the thermal source shield shell, the temperature detecting part of thermopile detector is located in the thermal source shielded-plate tube, the opening of thermal source shielded-plate tube and described tested wiring place are oppositely arranged, make thermopile detector only accept the heat radiation of described tested wiring place, effectively avoided of the influence of other thermals source, guaranteed the reliability and the accuracy of temperature detection thermopile detector.(3) in the utility model, the structure of screened cable can effectively shield extraneous interference, and the volume and weight of screened cable is less.
Description of drawings
Fig. 1 is the high-tension insulating bushing in the switchgear assembly state on_line monitoring device of the present utility model and the structural scheme of mechanism of drainage ring, temperature sensor, signal amplification circuit and central control unit;
Fig. 2 is the circuit theory synoptic diagram of above-mentioned current transformer;
Fig. 3 is the shielding construction synoptic diagram of above-mentioned drainage ring;
Fig. 4 is the structural representation of said temperature sensor.
Embodiment
(embodiment 1)
See Fig. 1-4, the switchgear assembly state on_line monitoring device of present embodiment comprises: be placed in the insulating sleeve 1 on the high pressure inlet wire in the switch cubicle, be with the drainage ring 2 of current transformer on the insulating sleeve 1; The power output end of current transformer is connected with temperature sensor 3, and this temperature sensor 3 is located at wiring place in the switch cubicle; The output terminal of temperature sensor 3 links to each other with the signal input part of signal amplification circuit 4 through screened cable 3-4, and the signal output part of signal amplification circuit 4 is exported into end with the temperature detection signal of central control unit 5 and linked to each other.
See Fig. 2, the inductive coil of described current transformer is around on the drainage ring 2, the output terminal of inductive coil is provided with finishing circuit D1, and the current output terminal of this finishing circuit D1 is provided with voltage stabilizer W1, and the dc output end of voltage stabilizer W1 is the power output end of described current transformer.Wherein, I1 is the electric current on the high pressure inlet wire in the insulating sleeve 1, and I2 is the induced current of the inductive coil of current transformer.
Described temperature sensor 3 adopts thermopile detector, thermopile detector is located in the thermal source shield shell 3-3, the front end of thermal source shield shell 3-3 is provided with thermal source shielded-plate tube 3-1, the temperature detecting part 3-2 of thermopile detector is located in the thermal source shielded-plate tube 3-1, the opening of thermal source shielded-plate tube 3-1 and described tested wiring place are oppositely arranged, and the temperature signal output terminal of thermopile detector is the output terminal of temperature sensor 3.
Because the switch cubicle scene exists a large amount of undesired signals can enter transmission cable in every way inevitably, mixes with measured signal, makes the sensitivity and the reliability decrease of online detection.
The utility model takes screen method to eliminate external disturbance, and shielding construction is considered at electric field and magnetic interference.Shield effectiveness is an index of weighing the shield effectiveness quality, and shield effectiveness is big more, and effect is good more.Total shadow loss comprises that absorption loss A, reflection loss R reach repeatedly reflection loss B.Generalized case B is less, calculates and only considers and will disturb relevant R and the A relevant with magnetic interference with electric field, and its calculating formula is respectively:
A＝131.43t√fσ
rμ
r(dB)--(1)
R＝321.7+10lg(σ
r/f
3r
2μ
r)(dB)--(2)
In the formula, f is a wave frequency; σ r is the conductivity of shield with respect to copper; μ r is the magnetic permeability of shield with respect to copper; T is the metallic shield body thickness; R is the distance of interference source from shield.
By formula (1), (2) as can be known, the effect of electromagnetic field and material, thickness, wave frequency and interference source are relevant from distance of shield etc.Usually adopt the copper material of high conductivity, low magnetic permeability as the electric field shielding material.Test shows that as long as the thickness＞30 μ m of copper shield material, its shield effectiveness all can reach more than the 120dB in the entire spectrum scope.But copper product is very poor for the shield effectiveness of low frequency magnetic field, does not almost have shielding action for the magnetic field of the supply frequency of power frequency 50Hz.If require the shield effectiveness of power frequency magnetic field is reached 40dB, then copper material thickness should reach more than the 1cm.
At the characteristics of electric system electromagnetic interference (EMI), the utility model has adopted the multilayer screen structure, sees Fig. 3.The outermost layer of the parcel of screened cable 3-4 is electric shield layer D, adopts the copper product of the thick high conductivity of 2mm; Be insulation course C in the electric shield layer D, adopt the thick high permeability permalloy material of 1mm; Be magnetic masking layer B in the insulation course C, adopt the iron sheet of the thick high-saturation magnetic induction density of 1mm.Be from inside to outside to be wrapped with magnetic masking layer B, insulation course C and electric shield layer D on the described screened cable 3-4 successively.See that the A among Fig. 3 is the cross section of screened cable 3-4.
Claims (1)
1, a kind of switchgear assembly state on_line monitoring device is characterized in that: comprise the insulating sleeve (1) on the high pressure inlet wire that is placed in the switch cubicle, be with the drainage ring (2) of current transformer on the insulating sleeve (1); The power output end of current transformer links to each other with the power end of a temperature sensor (3), and this temperature sensor (3) is located at wiring place in the switch cubicle; The output terminal of temperature sensor (3) links to each other through the signal input part of screened cable (3-4) with signal amplification circuit (4), and the signal output part of signal amplification circuit (4) is exported into end with the temperature detection signal of central control unit (5) and linked to each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201290459U CN201368774Y (en) | 2008-12-31 | 2008-12-31 | Complete set of switch apparatus state on-line monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201290459U CN201368774Y (en) | 2008-12-31 | 2008-12-31 | Complete set of switch apparatus state on-line monitoring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201368774Y true CN201368774Y (en) | 2009-12-23 |
Family
ID=41487666
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201290459U Expired - Fee Related CN201368774Y (en) | 2008-12-31 | 2008-12-31 | Complete set of switch apparatus state on-line monitoring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201368774Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106597058A (en) * | 2016-11-22 | 2017-04-26 | 深圳职业技术学院 | Switch state and distance position determining method for electric equipment of distribution system |
-
2008
- 2008-12-31 CN CNU2008201290459U patent/CN201368774Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106597058A (en) * | 2016-11-22 | 2017-04-26 | 深圳职业技术学院 | Switch state and distance position determining method for electric equipment of distribution system |
| CN106597058B (en) * | 2016-11-22 | 2019-01-29 | 深圳职业技术学院 | A kind of distribution system electric equipment switch state and the method for distance and position judgement |
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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: 20091223 Termination date: 20101231 |