CN203929940U - A kind of automatic heating system of transmission line parameter tester - Google Patents
A kind of automatic heating system of transmission line parameter tester Download PDFInfo
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- CN203929940U CN203929940U CN201420333613.2U CN201420333613U CN203929940U CN 203929940 U CN203929940 U CN 203929940U CN 201420333613 U CN201420333613 U CN 201420333613U CN 203929940 U CN203929940 U CN 203929940U
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- thermistor
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- heating system
- line parameter
- transmission line
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 52
- 230000005540 biological transmission Effects 0.000 title claims abstract description 23
- 238000012360 testing method Methods 0.000 abstract description 7
- 230000003044 adaptive effect Effects 0.000 abstract description 3
- 230000005611 electricity Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Abstract
The utility model discloses a kind of automatic heating system of transmission line parameter tester, this automatic heating system comprises heating element and thermistor, be arranged in tester two ends, the heat that heating element produces arrives thermistor after metering circuit and LED display, thermistor resistance raises and increases with temperature, when temperature rises to predetermined value, thermistor partly sends signal, and heating element stops heating, and the metering circuit of tester is started working.It is inner that automatic heating system of the present utility model is integrated in transmission line parameter tester, according to environment temperature automatic decision, whether start heating system, after heating system is opened, when reaching predetermined value, temperature automatically stops heating, and the measuring circuit that is switched to tester carries out line parameter circuit value test job, simple in structure, also can reliably working under the lower and low temperature of element cost used, improved performance and the temperature adaptive faculty of transmission line parameter tester.
Description
Technical field
The utility model belongs to electrical equipment field, relates in particular to a kind of automatic heating system of transmission line parameter tester.
Background technology
Newly-built and reconstruction ultra-high-tension power transmission line before putting into operation; should test various power frequency parameter values as positive order parameter, Zero sequence parameter etc., using and distribute and select the actual foundation of the work such as the reasonable method of operation as computing system short-circuit current, relay protection setting, reckoning trend.At present, domestic each test unit generally adopts transmission line parameter tester to measure the power frequency parameter value of transmission line of electricity.Tester by trial voltage and current sample, through modulo unit convert digital signal to, operational analysis is processed, measurement data and test findings are presented on LED screen the most at last.The robotization of tester and intelligent degree are higher, are integrated with a large amount of electron devices and chip on inner mainboard.Because economic development increases day by day to electricity needs, have a large amount of ultra-high-tension power transmission lines newly-built and reconstruction to put into operation, so line parameter circuit value test need to coordinate transmission line of electricity to put into operation the time, even in cold winter, also need to carry out line parameter circuit value surveying work.
But transmission line parameter tester often cannot normally be worked when temperature is lower.The electron device of tester inside and light-emitting diode display be unstable properties when low temperature, causes the inaccurate even LED of measurement result screen to show, to surveying work, brings great inconvenience.
Utility model content
The purpose of this utility model is to provide a kind of automatic heating system of transmission line parameter tester, is intended to solve transmission line parameter tester and often cannot normally works when temperature is lower, brings the problem of great inconvenience to surveying work.
The utility model is to realize like this, a kind of automatic heating system of transmission line parameter tester comprises heating element and thermistor, be arranged in tester two ends, the heat that heating element produces arrives thermistor after metering circuit and LED display, thermistor resistance raises and increases with temperature, when temperature rises to predetermined value, thermistor partly sends signal, and heating element stops heating, and the metering circuit of tester is started working;
Switch S is controlled cut-offfing of 220V power supply, thermistor RT connects with current relay KA, current relay KA controls the break-make of normally opened contact KAa and normally closed contact KAb, normally opened contact KAa connects with heating element, heating element is comprised of resistive heater and fan, normally closed contact KAb and time relay KT series connection, time relay KT is the on-delay time relay, time relay KT controls the break-make of normally opened contact KTa and normally closed contact KTb, when giving input signal, time relay KT triggers contact action after 2-3 time delay second, normally opened contact KTa connects with metering circuit, normally closed contact KTb connects with thermistor.
It is inner that automatic heating system of the present utility model is integrated in transmission line parameter tester, according to environment temperature automatic decision, whether start heating system, after heating system is opened, when reaching predetermined value, temperature automatically stops heating, and the measuring circuit that is switched to tester carries out line parameter circuit value test job, simple in structure, also can reliably working under the lower and low temperature of element cost used, improved performance and the temperature adaptive faculty of transmission line parameter tester.
Accompanying drawing explanation
Fig. 1 is the layout of the automatic heating system that provides of the utility model embodiment in transmission line parameter tester;
Fig. 2 is the circuit diagram of the automatic heating system that provides of the utility model embodiment.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.There is not the innovation of method or software in the utility model.
As shown in Figure 1, a kind of automatic heating system of transmission line parameter tester comprises heating element and thermistor, be arranged in tester two ends, the heat that heating element produces arrives thermistor after metering circuit and LED display, thermistor resistance raises and increases with temperature, when temperature rises to predetermined value, thermistor partly sends signal, and heating element stops heating, and the metering circuit of tester is started working;
As shown in Figure 2, switch S is controlled cut-offfing of 220V power supply, thermistor RT connects with current relay KA, current relay KA controls the break-make of normally opened contact KAa and normally closed contact KAb, normally opened contact KAa connects with heating element, heating element is comprised of resistive heater and fan, normally closed contact KAb and time relay KT series connection, time relay KT is the on-delay time relay, time relay KT controls the break-make of normally opened contact KTa and normally closed contact KTb, when giving input signal, time relay KT triggers contact action after 2-3 time delay second, normally opened contact KTa connects with metering circuit, normally closed contact KTb connects with thermistor.
The workflow of automatic heating system of the present utility model is as follows:
1, Closing Switch S, connects 220V power supply;
2, when environment temperature is during higher than predetermined value, thermistor RT resistance is larger, and loop current is lower than the setting valve of current relay KA, and normally opened contact KAa is in off-state, and heating element is not worked, and normally closed contact KAb is in closure state.Time relay KT moves through 2-3 second, and normally opened contact KTa is closed, and metering circuit switches on power and starts working, and normally closed contact KTb disconnects, and thermistor departs from power supply.
3, when environment temperature is during lower than predetermined value, thermistor RT resistance is less, and loop current is higher than the setting valve of current relay KA, and normally opened contact KAa is closed, and heating element starts heating, and normally closed contact KAb disconnects.Time relay KT is failure to actuate, and normally opened contact KTa is in off-state, and metering circuit is not worked, and normally closed contact KTb is in closure state, and thermistor continues to monitor the temperature of tester.When tester temperature is increased to predetermined value, thermistor resistance increases, and loop current reduces resets current relay KA, and normally opened contact KAa disconnects, and heating element stops heating, and normally closed contact KAb is closed.Time relay KT switches on power, and through 2-3, moves second, and normally opened contact KTa is closed, and metering circuit switches on power and starts working, and normally closed contact KTb disconnects, and thermistor departs from power supply.
4, after tester work, electron device self can produce heat, guarantees the normal operation of tester.
It is inner that automatic heating system of the present utility model is integrated in transmission line parameter tester, according to environment temperature automatic decision, whether start heating system, after heating system is opened, when reaching predetermined value, temperature automatically stops heating, and the measuring circuit that is switched to tester carries out line parameter circuit value test job, simple in structure, also can reliably working under the lower and low temperature of element cost used, improved performance and the temperature adaptive faculty of transmission line parameter tester.
Although above-mentioned, by reference to the accompanying drawings embodiment of the present utility model is described; but the not restriction to the utility model protection domain; one of ordinary skill in the art should be understood that; on the basis of the technical solution of the utility model, those skilled in the art do not need to pay various modifications that performing creative labour can make or distortion still within protection domain of the present utility model.
Claims (1)
1. the automatic heating system of a transmission line parameter tester, it is characterized in that, the automatic heating system of described transmission line parameter tester comprises heating element and thermistor, be arranged in tester two ends, the heat that heating element produces arrives thermistor after metering circuit and LED display, thermistor resistance raises and increases with temperature, when temperature rises to predetermined value, thermistor partly sends signal, heating element stops heating, and the metering circuit of tester is started working;
Switch S is controlled cut-offfing of 220V power supply, thermistor RT connects with current relay KA, current relay KA controls the break-make of normally opened contact KAa and normally closed contact KAb, normally opened contact KAa connects with heating element, heating element is comprised of resistive heater and fan, normally closed contact KAb and time relay KT series connection, time relay KT is the on-delay time relay, time relay KT controls the break-make of normally opened contact KTa and normally closed contact KTb, when giving input signal, time relay KT triggers contact action after 2-3 time delay second, normally opened contact KTa connects with metering circuit, normally closed contact KTb connects with thermistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420333613.2U CN203929940U (en) | 2014-06-20 | 2014-06-20 | A kind of automatic heating system of transmission line parameter tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420333613.2U CN203929940U (en) | 2014-06-20 | 2014-06-20 | A kind of automatic heating system of transmission line parameter tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203929940U true CN203929940U (en) | 2014-11-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420333613.2U Expired - Lifetime CN203929940U (en) | 2014-06-20 | 2014-06-20 | A kind of automatic heating system of transmission line parameter tester |
Country Status (1)
| Country | Link |
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| CN (1) | CN203929940U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115262790A (en) * | 2022-06-28 | 2022-11-01 | 清华大学 | Shape memory alloy damper |
-
2014
- 2014-06-20 CN CN201420333613.2U patent/CN203929940U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115262790A (en) * | 2022-06-28 | 2022-11-01 | 清华大学 | Shape memory alloy damper |
| CN115262790B (en) * | 2022-06-28 | 2023-12-22 | 清华大学 | Shape memory alloy damper |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP02 | Change in the address of a patent holder |
Address after: 300010 Tianjin city Hebei District Wujing Road No. 39 Patentee after: State Grid Corporation of China Patentee after: STATE GRID TIANJIN ELECTRIC POWER Co. Address before: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Patentee before: State Grid Corporation of China Patentee before: STATE GRID TIANJIN ELECTRIC POWER Co. |
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| CX01 | Expiry of patent term |
Granted publication date: 20141105 |