CN203811766U - Portable large shaft insulation monitoring device - Google Patents
Portable large shaft insulation monitoring device Download PDFInfo
- Publication number
- CN203811766U CN203811766U CN201420254864.1U CN201420254864U CN203811766U CN 203811766 U CN203811766 U CN 203811766U CN 201420254864 U CN201420254864 U CN 201420254864U CN 203811766 U CN203811766 U CN 203811766U
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- transmitter
- programme
- macro
- input end
- insulation monitoring
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Abstract
The utility model discloses a portable large shaft insulation monitoring device comprising a first programmable transmitter and a second programmable transmitter. Two wires of the input end of the first programmable transmitter are respectively connected with a large shaft and a copper foil. Two wires of the input end of the second programmable transmitter are respectively connected with the copper foil and a shaft collar. A first capacitor C1 is parallely connected between the two wires of the input end of the first programmable transmitter, and a second capacitor C2 is parallely connected between the two wires of the input end of the second programmable transmitter. The output end of the first programmable transmitter is connected with an isolation switch by a first intermediate relay, and the output end of the second programmable transmitter is connected with the isolation switch by a second intermediate relay, and in addition, the isolation switch is connected with a switch power supply. The portable large shaft insulation monitoring device is advantageous in that the carrying is convenient, and the working condition requirement is low; the large shaft insulation monitoring can be completed on the generator terminal only by using the 220V AC power supply interface and the electric conductor, and therefore the use is convenient and fast, and the working efficiency can be improved.
Description
Technical field
A kind of portable macro-axis insulation monitoring and warning device of the utility model, for hydraulic generator unit macro-axis insulation monitoring.
Background technology
Due to the non-uniform air-gap between stator and rotor; And the reason such as the local magnetic resistance of stator core is large, magnetic circuit is asymmetric, cause the stator field of generator to exist uneven.Make to produce on the rotor of hydrogenerator alternating flux and axial induced potential, the i.e. shaft voltage crossing with axle.Can be too not high for hydrogenerator shaft voltage, be no more than 10V.Although shaft voltage effective value is little, under the pulsed magnetic field action of the various alternations of generator, peak value may be very high, and hydrogenerator machine rotor macro-axis resistance is very little, and bearing and large between centers are only less than the oil clearance of 1mm.As: axle neck and large between centers insulation breakdown, shaft voltage will form closed-loop path generation shaft current along bearing and base plate, and bearing shell is caused damage.Normal axis voltage does not produce direct harm to equipment itself, only after axle insulation breakdown, just produces consequence, and therefore the monitoring of axle insulation is extremely important.At present, in prior art, certain unit adopts two SINEAX V604 general programmable transmitters to utilize its resistance measurement function, and insulation situation is monitored.Certain unit SINEAX V604 general programmable transmitter is placed in the dish cabinet of generator wind-tunnel periphery, and axle neck, Copper Foil carbon brush are at machine end, and macro-axis grounding carbon brush is at lower end axle.Due to wind-tunnel periphery disembark end and lower end axle far need cable laying, just in time parallel with generator stator bar to machine end cable.If cable shield is bad, interference can cause macro-axis insulation monitoring wrong report misoperation.In addition, if the bad macro-axis insulation monitoring that also can cause of lower end axle grounding carbon brush ground connection is reported misoperation by mistake.In the time of macro-axis insulation alarm, whether relevantly with above-mentioned reason often can not determine.There is in addition following drawback:
1), at uncertain SINEAX V604 general programmable transmitter to machine end cable; And lower end be coupling ground, in the whether problematic situation of carbon brush ground connection, cannot carry out experimental except defect.
2), in the time doing macro-axis Insulation Test, wind-tunnel periphery and machine end all need personnel to coordinate, and have not only taken manpower effectiveness but also not high.
Summary of the invention
For solving the problems of the technologies described above, the utility model provides a kind of portable macro-axis insulation monitoring and warning device, easy to carry, the condition of work needing requires low, only need 220V AC power supply jack and electrical lead just can complete the supervision to macro-axis insulation at machine end, easy-to-use quick, increase work efficiency.
The technical scheme that the utility model is taked is: portable macro-axis insulation monitoring and warning device, comprise the first transmitter able to programme, the second transmitter able to programme, and two lines of input end of the first transmitter able to programme are connected with macro-axis, Copper Foil respectively; Two lines of input end of the second transmitter able to programme are connected with Copper Foil, axle neck respectively.The second capacitor C 2 in parallel between two lines of input end of the first capacitor C 1, the second transmitter able to programme in parallel between two lines of input end of the first transmitter able to programme.The output terminal of described the first transmitter able to programme connects disconnector by the first auxiliary reclay, and the output terminal of described the second transmitter able to programme connects disconnector, disconnector connecting valve power supply by the second auxiliary reclay.
After the input end short circuit of the input end of described the first transmitter able to programme and the second transmitter able to programme, be connected to the common port of connection terminal.
Between described macro-axis and axle neck, be provided with insulation course, Copper Foil is installed in the middle of insulation course.
Described the first transmitter able to programme, the second transmitter able to programme are SINEAX V604 general programmable transmitter.
The open-circuit voltage of described the first transmitter able to programme, the second transmitter able to programme is not more than 3.7V.
Described the first capacitor C 1, the second capacitor C 2 are 1 μ F.
Described Switching Power Supply output 24V DC voltage.
A kind of portable macro-axis insulation monitoring and warning device of the utility model, measures respectively the insulation resistance between macro-axis and Copper Foil, Copper Foil and axle neck, finds in time the insulation defect between macro-axis and axle neck, sends warning contact by the output terminal of two transmitters able to programme.
The SINEAX V604 type general programmable transmitter adopting, is that the adaptive constant current signal of 60 to 380 μ A is carried out measuring resistance by injecting amplitude, and actual measurement open-circuit voltage is not more than 3.7V.It is that 0～5000 Ω also can adjust that the utility model device itself can not cause damage, resistance measurement scope to macro-axis insulation.Transmitter able to programme itself possesses multiple signal lamps.Show survey sensor open circuit when green light flashes, represent that the insulation of tested loop is good.If measuring resistance is lower than measuring setting valve, pilot lamp becomes Chang Liang, indicates the insulation of tested loop to decline.
The unit shaft voltage of considering is higher, and shaft voltage seals in measuring circuit, has disturbed the correct measurement of insulation monitoring and warning device.The utility model device is in measurement port and accessed the large electric capacity of a 1 μ F, filters AC compounent.Utilize the little electric capacity that this electric capacity and Copper Foil and macro-axis (or axle neck) form to form AC series dividing potential drop.Effectively reduce the interchange interference voltage of the measurement port of insulation monitoring and warning device.In addition, the normal need of work of SINEAX V604 general programmable transmitter has 24V DC voltage, and in working site power taking source side just, the utility model device has adopted Switching Power Supply, Switching Power Supply input 220V alternating voltage output 24V DC voltage.
Brief description of the drawings
Fig. 1 is the utility model apparatus structure schematic diagram;
Fig. 2 is the utility model measurement device connection diagram.
Embodiment
As shown in Figure 1 and Figure 2, portable macro-axis insulation monitoring and warning device, comprises the first transmitter 1 able to programme, the second transmitter 2 able to programme.Two lines of input end of the first transmitter 1 able to programme are connected with macro-axis 5, Copper Foil 5.1 respectively; Two lines of input end of the second transmitter 2 able to programme are connected with Copper Foil 5.1, axle neck 5.2 respectively.Between described macro-axis 5 and axle neck 5.2, be provided with insulation course, Copper Foil 5.1 is to be installed in the middle of insulation course.
The second capacitor C 2 in parallel between two lines of input end of the first capacitor C 1, the second in parallel transmitter 2 able to programme between two lines of input end of the first transmitter 1 able to programme; Described the first capacitor C 1, the second capacitor C 2 are 1 μ F.
The output terminal of described the first transmitter 1 able to programme connects disconnector 4 by the first auxiliary reclay 3.1, and the output terminal of described the second transmitter 2 able to programme connects disconnector 4 by the second auxiliary reclay 3.2, disconnector 4 connecting valve power supplys 6.Described Switching Power Supply 6 is exported 24V DC voltage.
The input end of the input end of described the first transmitter 1 able to programme and Copper Foil 5.1 connecting lines, the second transmitter 2 able to programme and axle lead 5.2 connecting lines to be all connected to the common port com of connection terminal.
Described the first transmitter 1 able to programme, the second transmitter 2 able to programme are SINEAX V604 general programmable transmitter.The open-circuit voltage of described the first transmitter 1 able to programme, the second transmitter 2 able to programme is not more than 3.7V.
As described in Figure 2, a kind of portable macro-axis insulation monitoring and warning device of the utility model, common port com connects the Copper Foil 5.1 of macro-axis 5, and outer spindle is led 5.2 carbon brush, and internal layer connects macro-axis grounding carbon brush.R1 is primary insulation resistance, and R2 is outer layer insulation resistance.The utility model is in power-on self-test process, and about the closed 3～5s of warning contact meeting, supervision should be avoided this time.
Claims (7)
1. portable macro-axis insulation monitoring and warning device, comprises the first transmitter able to programme (1), the second transmitter able to programme (2), it is characterized in that, two lines of input end of the first transmitter able to programme (1) are connected with macro-axis (5), Copper Foil (5.1) respectively; Two lines of input end of the second transmitter able to programme (2) are connected with Copper Foil (5.1), axle neck (5.2) respectively; The second capacitor C 2 in parallel between two lines of input end of the first capacitor C 1, the second in parallel transmitter able to programme (2) between two lines of input end of the first transmitter able to programme (1); The output terminal of described the first transmitter able to programme (1) connects disconnector (4) by the first auxiliary reclay (3.1), the output terminal of described the second transmitter able to programme (2) connects disconnector (4), disconnector (4) connecting valve power supply (6) by the second auxiliary reclay (3.2).
2. portable macro-axis insulation monitoring and warning device according to claim 1, is characterized in that, is connected to the common port (com) of connection terminal after the input end short circuit of the input end of described the first transmitter able to programme (1) and the second transmitter able to programme (2).
3. according to portable macro-axis insulation monitoring and warning device described in claim 1 or 2, it is characterized in that, between described macro-axis (5) and axle neck (5.2), be provided with insulation course, Copper Foil (5.1) is arranged in the middle of insulation course.
4. according to portable macro-axis insulation monitoring and warning device described in claim 1 or 2, it is characterized in that, described the first transmitter able to programme (1), the second transmitter able to programme (2) are SINEAX V604 general programmable transmitter.
5. according to portable macro-axis insulation monitoring and warning device described in claim 1 or 2, it is characterized in that, the open-circuit voltage of described the first transmitter able to programme (1), the second transmitter able to programme (2) is not more than 3.7V.
6. portable macro-axis insulation monitoring and warning device according to claim 1, is characterized in that, described the first capacitor C 1, the second capacitor C 2 are 1 μ F.
7. according to portable macro-axis insulation monitoring and warning device described in claim 1 or 2, it is characterized in that described Switching Power Supply (6) output 24V DC voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420254864.1U CN203811766U (en) | 2014-05-19 | 2014-05-19 | Portable large shaft insulation monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420254864.1U CN203811766U (en) | 2014-05-19 | 2014-05-19 | Portable large shaft insulation monitoring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203811766U true CN203811766U (en) | 2014-09-03 |
Family
ID=51450499
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420254864.1U Expired - Fee Related CN203811766U (en) | 2014-05-19 | 2014-05-19 | Portable large shaft insulation monitoring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203811766U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105548655A (en) * | 2015-12-07 | 2016-05-04 | 辽宁东科电力有限公司 | Device for monitoring and controlling shaft voltage and shaft current of turbo-generator online |
| CN114542357A (en) * | 2022-02-18 | 2022-05-27 | 中国长江电力股份有限公司 | Hydraulic generator set large shaft insulation monitoring protection logic optimization method |
-
2014
- 2014-05-19 CN CN201420254864.1U patent/CN203811766U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105548655A (en) * | 2015-12-07 | 2016-05-04 | 辽宁东科电力有限公司 | Device for monitoring and controlling shaft voltage and shaft current of turbo-generator online |
| CN114542357A (en) * | 2022-02-18 | 2022-05-27 | 中国长江电力股份有限公司 | Hydraulic generator set large shaft insulation monitoring protection logic optimization method |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140903 Termination date: 20180519 |