CN1908687A - Voltage type tester for short-circuit and earth-fault indicator - Google Patents
Voltage type tester for short-circuit and earth-fault indicator Download PDFInfo
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- CN1908687A CN1908687A CN 200510036313 CN200510036313A CN1908687A CN 1908687 A CN1908687 A CN 1908687A CN 200510036313 CN200510036313 CN 200510036313 CN 200510036313 A CN200510036313 A CN 200510036313A CN 1908687 A CN1908687 A CN 1908687A
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- 239000002253 acid Substances 0.000 claims description 3
- 238000007726 management method Methods 0.000 description 7
- 238000001514 detection method Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
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- 238000010586 diagram Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
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- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012913 prioritisation Methods 0.000 description 1
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- 239000007858 starting material Substances 0.000 description 1
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Abstract
The disclosed voltage tester for short-circuit and grounding fault indicator comprises: a control module, a charge cell, an inversion module, and an I/O module, wherein the control module drives the cell switching in or out the inversion module with frequency as 48-120Hz and 1:1 duty cycle; the I/O module, control module and inversion module connect with the keyboard, cell charge signal, voltage signal, and LED indication. This invention can reduce error report when power failure.
Description
Technical field
What the present invention relates to is the on-spot tester of a kind of ultra-high-tension power transmission line with short circuit and earth-fault indicator, especially a kind of tester that can carry out on-the-spot online detection behind the installation fault detector.
Background technology
At present, in electric system, fault detector has been widely used in the short circuit and the earth fault indication of 10kV-35kV electric pressure.Fault detector is in sleep state when the power circuit non-fault, have only just to understand starter gear provide warning when the fault of trigger condition having occurred satisfying.In a single day the probability that power circuit breaks down under the normal condition is very low, and breaks down, then require fault detector be able to accurately catch.But at present the fault detector of the various models of different manufacturers of on-the-spot operation does not generally have on-the-spot detection means, can not online detection failure indicator, occur easily owing to fault detector malfunctioning caused wrong report, fails to report fault.
Summary of the invention
In order to realize the on-the-spot test of fault detector, the invention provides a kind of short circuit and earth-fault indicator voltage type tester, this tester can be easily after the fault detector installation or in service, under the situation of line outage, at any time whether the detection failure indicator is normal with definite fault detector work.
Technical solution of the present invention is: short circuit and earth-fault indicator voltage type tester are connected to form by control module, rechargeable battery set, inversion module, input/output module, wherein to drive the rechargeable battery set incision or cut out inversion module and modulate frequency be 48-120Hz to control module, dutycycle is 1: 1 a voltage signal, and input/output module is connected respectively with inversion module with control module and realizes that keyboard input, the input of battery electric quantity low signal, voltage signal output, LED indicate output.
Calculate (GB/T 15544-1995) according to State Standard of the People's Republic of China's three-phase alternating current system short-circuit electric current, Fig. 1, current waveform figure when being respectively far away, near-end short circuit among Fig. 2, by on the figure as can be seen the frequency of short-circuit current still keep system frequency, be 50Hz in this frequency of China.The optimum signal of in-site modeling should be the short-circuit current signal of same waveform, but the energy requirement height of this current signal, the generator size is huge, and poor stability may bring influence to other operational outfits.In fault detector, the fault current signal is by the current transformer (short-circuit sensor) of band clearance, convert voltage signal at secondary side to by pull-up resistor, can think that fault can produce same output when taking place as long as can simulate this voltage signal.By analyzing as can be known, as long as modulate in proportion Fig. 1, the voltage waveform of current waveform shown in Figure 2 as long as promptly modulate the voltage square wave (the short-circuit current negative half-cycle signal is anti-phase) of 100Hz, just can be simulated short-circuit current.
As a kind of prioritization scheme, it also is provided with the battery management module of battery detecting module and the described rechargeable battery set of control, and wherein the battery detecting module links to each other with control module.Be economize on electricity, the back tester that powers on enters sleep state, waits for waking up of keyboard in the input/output module or battery electric quantity low signal.If it is low that the battery detecting module detects battery electric quantity, then drive input/output module by control module, corresponding LED indication is lighted.If the output of keyboard voltage signal, then control module drives input/output module rechargeable battery set is cut inversion circuit, carries out the voltage signal modulation, drives input/output module again simulating signal is exported along separate routes, and simultaneously the LED indication of correspondence is lighted.When the prompting electric weight is low, charge power supply is inserted, by battery management module rechargeable battery set is charged, manage according to the type selecting charge mode of rechargeable battery set and to electric battery, prevent over-charging of battery, when electric battery has fault, provide the indicating fault requirement and change.
For further reduction procedure, with the waveform half-wave rectification, be converted into the waveform that frequency is 100Hz, and only consider the situation of short circuit after basicly stable, described control module drives the rechargeable battery set incision or cuts out inversion module and modulate amplitude is 18V, frequency 100Hz, dutycycle is 1: 1 a voltage signal.
Described control module is the 16F877A single-chip microcomputer, and the square-wave generator that described inversion module is made of 6 reversers drives the C-MOS pipe and forms.
Described rechargeable battery set is composed in series by the chargeable maintenance-free lead-acid battery of 3 joint 6V.
Advantage of the present invention is: can be easily after the fault detector installation or in service, under the situation of line outage, whether the failure judgement indicator working properly, to reduce owing to the wrong report that the fault of fault detector own is brought, fail to report line fault.
Description of drawings
Current waveform figure during the short circuit of Fig. 1 far-end;
The current waveform figure of Fig. 2 near-end short circuit;
The functional block diagram of Fig. 3 embodiment of the invention;
The voltage modulated output and the battery management process flow diagram of Fig. 4 embodiment of the invention;
" k is an initial symmetrical short-circuit current to I in accompanying drawing 1 and accompanying drawing 2; Ip is a peak value of short; Ik is a steady-state shortcircuit current; IDC is a DC component of short-circuit current; A is the initial value of aperiodic component iDC; 1, control module, 2, inversion module, 3, rechargeable battery set, 4, input/output module, 5, the battery detecting module, 6, battery management module.
Embodiment
Embodiment: shown in Fig. 3 and 4, short circuit and earth-fault indicator voltage type tester are by control module 1, rechargeable battery set 3, inversion module 2, input/output module 4, battery detecting module 5 and battery management module 6 connect to form, wherein to drive rechargeable battery set 3 incisions or cut out inversion module 2 and modulate amplitude be 18V for control module 1, frequency 100Hz, dutycycle is 1: 1 a voltage signal, can realize the keyboard input, the input of battery electric quantity low signal, voltage signal output, the input/output module 4 of LED indication output is connected respectively with inversion module 2 with control module 1.Described control module 1 is the 16F877A single-chip microcomputer, and described inversion module 2 is made up of the square-wave generator that 6 reversers constitute, and described rechargeable battery set 3 is made up of the chargeable maintenance-free lead-acid battery of 3 joint 6V.
One 50K adjustable resistance is arranged in the battery management module 6, set the low magnitude of voltage of reporting to the police of electric weight.Can select the maximum permissible voltage value of charging, lowest high-current value and maximum charge time; Also can select charge mode, realize rapid charge, charge at a slow speed and safeguard charging.Whether battery detecting module 5 can detect battery automatically fault, when cell voltage drops to the low alarm voltage value of the electric weight of setting, and the comparer action, output look-at-me start-up control module, plumbous electric alarm indication LED is bright, requires charging, and should insert external power supply this moment.Battery management module 6 detects at first whether battery is arranged, and whether battery is normal, if battery is changed in the bright requirement of undesired then indicating fault LED; Battery judges then normally whether cell voltage drops to needs rapid charge, if then at first rapid charge cell voltage improved enter charge mode at a slow speed again, if not, then directly enter charge mode at a slow speed.When charging at a slow speed cell voltage is charged to setting value and then enters the maintenance charging, this moment, charging process finished can normally use at any time.
After detecting voltage modulated output request, at first control module 1 drives relay closure successively, with rechargeable battery set 3 incisions, select to drive C-MOS field effect transistor output voltage modulation signal according to hardware setting then by the 6 reversers output square wave of forming inversion module 2 or by control module 1 output PWM ripple; Wherein the frequency of square-wave signal can be adjusted by adjustable resistance, the PWM wave frequency is adjusted by the program in the control module, after waiting for 200mS, the difference closing relay, light corresponding LED indication simultaneously respectively, output signal drives corresponding short-circuit sensor, and the time of wherein closing is 200mS, and the time of branch also is 200mS.The disjunction successively of rear drive relay is finished in output, and rechargeable battery set is cut out, and enters the sleep waiting status.
Claims (5)
1, a kind of short circuit and earth-fault indicator voltage type tester, it is characterized in that: it is connected to form by control module (1), rechargeable battery set (3), inversion module (2), input/output module (4), wherein to drive that rechargeable battery set (3) cuts or cut out inversion module (2) and modulate frequency be 48-120Hz to control module (1), dutycycle is 1: 1 a voltage signal, and input/output module (4) is connected respectively with inversion module (2) with control module (1) and realizes that keyboard input, the input of battery electric quantity low signal, voltage signal output, LED indicate output.
2, short circuit according to claim 1 and earth-fault indicator voltage type tester, it is characterized in that: it also is provided with the battery management module (6) of battery detecting module (5) and the described rechargeable battery set of control, and wherein battery detecting module (5) links to each other with control module.
3, short circuit according to claim 1 and 2 and earth-fault indicator voltage type tester, it is characterized in that: described control module (1) driving rechargeable battery set (3) is cut or cut out inversion module (2) and modulates amplitude is 18V, frequency 100Hz, dutycycle is 1: 1 a voltage signal.
4, short circuit according to claim 3 and earth-fault indicator voltage type tester, it is characterized in that: described control module (1) is the 16F877A single-chip microcomputer, and the square-wave generator that described inversion module (2) is made of 6 reversers drives the C-MOS pipe and forms.
5, short circuit according to claim 3 and earth-fault indicator voltage type tester is characterized in that: described rechargeable battery set (3) is composed in series by the chargeable maintenance-free lead-acid battery of 3 joint 6V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510036313 CN1908687A (en) | 2005-08-04 | 2005-08-04 | Voltage type tester for short-circuit and earth-fault indicator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510036313 CN1908687A (en) | 2005-08-04 | 2005-08-04 | Voltage type tester for short-circuit and earth-fault indicator |
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| Publication Number | Publication Date |
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| CN1908687A true CN1908687A (en) | 2007-02-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510036313 Pending CN1908687A (en) | 2005-08-04 | 2005-08-04 | Voltage type tester for short-circuit and earth-fault indicator |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105954636A (en) * | 2016-04-21 | 2016-09-21 | 张顺 | Short circuit and ground fault indicator |
| CN110869786A (en) * | 2017-07-10 | 2020-03-06 | Abb瑞士股份有限公司 | Ground fault detection of UPS battery pack |
| CN111665416A (en) * | 2020-05-30 | 2020-09-15 | 河北新天科创新能源技术有限公司 | Overhead line fault indicating device |
| CN117310520A (en) * | 2023-11-06 | 2023-12-29 | 北京浩华星电气设备技术开发有限公司 | Method and device for monitoring fault indicator battery, storage medium and electronic equipment |
-
2005
- 2005-08-04 CN CN 200510036313 patent/CN1908687A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105954636A (en) * | 2016-04-21 | 2016-09-21 | 张顺 | Short circuit and ground fault indicator |
| CN110869786A (en) * | 2017-07-10 | 2020-03-06 | Abb瑞士股份有限公司 | Ground fault detection of UPS battery pack |
| CN110869786B (en) * | 2017-07-10 | 2022-12-06 | Abb瑞士股份有限公司 | Ground Fault Detection for UPS Battery Packs |
| CN111665416A (en) * | 2020-05-30 | 2020-09-15 | 河北新天科创新能源技术有限公司 | Overhead line fault indicating device |
| CN117310520A (en) * | 2023-11-06 | 2023-12-29 | 北京浩华星电气设备技术开发有限公司 | Method and device for monitoring fault indicator battery, storage medium and electronic equipment |
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Open date: 20070207 |