CN2417480Y - On-line testing arrangement for lightning protector - Google Patents
On-line testing arrangement for lightning protector Download PDFInfo
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- CN2417480Y CN2417480Y CN 00219117 CN00219117U CN2417480Y CN 2417480 Y CN2417480 Y CN 2417480Y CN 00219117 CN00219117 CN 00219117 CN 00219117 U CN00219117 U CN 00219117U CN 2417480 Y CN2417480 Y CN 2417480Y
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Abstract
The utility model relates to an on-line testing instrument for an FZ type series lightning protector, which is special equipment used for testing FZ type series lightning protector on lines in an electric power system. The utility model comprises a meter body, a voltage circuit, a current circuit and digital displays. The utility model is characterized in that the voltage circuit is matched with a capacitance voltage divider with high resistance; the voltage circuit and the current circuit are respectively provided with an input end on a meter housing; an earth terminal, a changeover switch which switches the digital displays in the voltage circuit and the current circuit, an input end providing working power supply and a mains switch switching on / switching off the working power supply are additionally arranged on the meter housing. The utility model has the advantages of convenient use, accurate acquired data, simple meter structure and portability, and can be operated under high pressure.
Description
The tester of special use when the utility model relates to the series of on-line testing FZ type in a kind of electric system lightning arrester.
In electric system, the lightning arrester of on-line operation is in the majority with FZ type series lightning arrester, must power failure do dc leakage-current respectively every year in accordance with regulations, the measurement of insulation resistance, whether be damaged to detect lightning arrester, and fact damaged rate very low (less than 5%), but it is normal in order to ensure operation of power networks, annual example inspection must be carried out as usual, both brought enormous economic loss to electric power system, life is made troubles to people's work again, therefore, we have developed a kind of feasible, effective, the on-line testing method (this method of testing is declared patent of invention simultaneously) of the FZ type series lightning arrester of accuracy of judgement, under situation about not having a power failure, the short circuit counter, measure the dividing potential drop at lightning arrester group final section T place, use r
u=(maximum voltage-minimum voltage)/minimum voltage calculates the imbalance of three-phase voltage coefficient at T place, with it is benchmark, the quality of principium identification lightning arrester group, disconnect counter then, measure the voltage-to-ground and the whole total current over the ground of organizing at lightning arrester D point place (with reference to figure 1), calculate the imbalance of three-phase voltage coefficient at D point place, three-phase current unbalance coefficient (r
i=(maximum current-minimum current)/minimum current), makes basis for estimation, if the r at T point place, D point place with this
uAll less than 18%, r
iLess than 20%, can make the conclusion that lightning arrester does not have damage, otherwise just needing considers to have a power failure detects.In the on-line testing of FZ type series lightning arrester, owing to be operation under the high pressure, existing voltage, reometer can not satisfy its test request well, and at the singularity of on-line testing, we have developed the specialized equipment of a kind of FZ of being suitable for type series lightning arrester on-line testing.
The purpose of this utility model provides the dedicated tester of a kind of suitable FZ type series lightning arrester on-line testing just at the characteristic of on-line testing.
Being achieved as follows of the utility model purpose: FZ type series lightning arrester on-line testing instrument, comprise table body, potential circuit, current circuit and digital indicator, it is characterized in that potential circuit connects a high resistant capacitive divider, described potential circuit, current circuit are provided with input end respectively at watchcase, are provided with change-over switch, the input end that working power is provided and connection/the close power switch of working power of digital indicator in earth terminal, conversion two circuit on the watchcase in addition.
When carrying out the test of lightning arrester final section T punishment portion voltage with this tester, elder generation's short circuit counter, to avoid the influence of counter to test result, insert the working power of measuring instrument, behind the earth terminal good earth on the watchcase, with lead the high resistant capacitive divider is connected with voltage input end on the watchcase, the lead that the high resistant capacitive divider other end is drawn inserts the T place, arrange change-over switch and connect the voltage digital display, turn on the power switch, start tester, can read the dividing potential drop at T place, only need the powered-down switch behind the record data, the T place wiring of dismantling just can be carried out the test of bottom, D place voltage, method only must disconnect counter earlier with the T place before test.
Measure whole group of D point place over the ground during total current, also must under the prerequisite that counter disconnects, carry out, after being connected to the earth terminal good earth of tester of working power, with current input terminal and the D place on the lead connection watchcase, change-over switch places current digital display open mode, turns on the power switch and can read corresponding current values.
The high resistant capacitive divider of this tester also can place the potential circuit in the watchcase, and the voltage input end during use on the watchcase then can directly be connected with lead with tested pilot.
This tester can be made up of one group of potential circuit, current circuit, when measuring with this tester, if three-phase operation voltage is steady, can adopt single-phase measurement one by one; If three-phase operation voltage is steady but uneven, the higher or on the low side phenomenon of voltage is promptly arranged, for avoiding unbalanced influence, test when available three testers carry out three-phase; If have harmonic component in the three-phase operation voltage, its voltage balance whether no matter, as long as avoid jiggly peak period, the result who measures with corresponding detection method the experiment proved that also and need not consider its influence of harmonic.This tester also can be made up of two groups or three groups of potential circuits, current circuits, and its best is three groups, can obtain three-phase voltage or electric current simultaneously during measurement, and is not only simple to operate but also can avoid the influence of some unbalanced factors.
The utility model is exclusively used in the on-line testing of FZ type series lightning arrester, and easy to use, the data of acquisition are accurate, and instrument structure is simple and portable.
Fig. 1 is the wiring diagram of on-line testing method.
Fig. 2 is a voltage schematic diagram of the present utility model.
Fig. 3 is electric current principle figure of the present utility model.
Further specify the present invention below in conjunction with embodiment:
Embodiment 1, make the FZ type series lightning arrester on-line testing instrument of boxlike, comprise the table body, potential circuit, current circuit and digital indicator, potential circuit connects a high resistant capacitive divider, it is not deposited in the lid separately and is easy to carry the time spent, one end is connected with voltage input end on the watchcase to connect potential circuit during use, the other end then links to each other with tested pilot, is provided with the current input terminal of current circuit on the watchcase in addition, earth terminal, change the change-over switch of digital indicator in two circuit, the input end of working power and connection/the close power switch of working power is provided.
Embodiment 2, reference example 1, be equipped with three groups of potential circuits, current circuit in the boxlike table body, in order to test three-phase voltage or electric current simultaneously, avoid the influence of this unbalanced factor, the high resistant capacitive divider places the potential circuit in the table body respectively, does not need to deposit separately, only needs during use voltage input end is directly connected with lead with tested pilot.
Claims (3)
1.FZ type series lightning arrester on-line testing instrument, comprise table body, potential circuit, current circuit and digital indicator, it is characterized in that potential circuit connects a high resistant capacitive divider, described potential circuit, current circuit are provided with input end respectively at watchcase, are provided with change-over switch, the input end that working power is provided and connection/the close power switch of working power of digital indicator in earth terminal, conversion two circuit on the watchcase in addition.
2. on-line testing instrument according to claim 1 is characterized in that the high resistant capacitive divider places the potential circuit of table in the body, the voltage input end on the watchcase then directly and test point join with lead.
3. on-line testing instrument according to claim 1 and 2 is characterized in that being equipped with respectively in the watchcase three groups of potential circuits, current circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00219117 CN2417480Y (en) | 2000-01-14 | 2000-01-14 | On-line testing arrangement for lightning protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00219117 CN2417480Y (en) | 2000-01-14 | 2000-01-14 | On-line testing arrangement for lightning protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2417480Y true CN2417480Y (en) | 2001-01-31 |
Family
ID=33584350
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00219117 Expired - Fee Related CN2417480Y (en) | 2000-01-14 | 2000-01-14 | On-line testing arrangement for lightning protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2417480Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103630729A (en) * | 2013-11-13 | 2014-03-12 | 国家电网公司 | One-step wiring device and method for testing 1000kV lightning arrester reference voltage and leakage current |
| CN106291202A (en) * | 2016-09-23 | 2017-01-04 | 国家电网公司 | A kind of electrical characteristic test device of transformer station low voltage surge arrester |
-
2000
- 2000-01-14 CN CN 00219117 patent/CN2417480Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103630729A (en) * | 2013-11-13 | 2014-03-12 | 国家电网公司 | One-step wiring device and method for testing 1000kV lightning arrester reference voltage and leakage current |
| CN103630729B (en) * | 2013-11-13 | 2015-12-30 | 国家电网公司 | The primary connection device and method of test 1000kV lightning arrester reference voltage and leakage current |
| CN106291202A (en) * | 2016-09-23 | 2017-01-04 | 国家电网公司 | A kind of electrical characteristic test device of transformer station low voltage surge arrester |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |