CN201364378Y - Mechanical life testing device of high-voltage switch - Google Patents
Mechanical life testing device of high-voltage switch Download PDFInfo
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- CN201364378Y CN201364378Y CNU2009200957243U CN200920095724U CN201364378Y CN 201364378 Y CN201364378 Y CN 201364378Y CN U2009200957243 U CNU2009200957243 U CN U2009200957243U CN 200920095724 U CN200920095724 U CN 200920095724U CN 201364378 Y CN201364378 Y CN 201364378Y
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- 238000012360 testing method Methods 0.000 title claims abstract description 80
- 230000015572 biosynthetic process Effects 0.000 claims description 7
- 230000005611 electricity Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000010998 test method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
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Abstract
The utility model relates to a mechanical life testing device of a high-voltage switch, which is composed of a shell body and a control circuit at the inner part of the shell body. The control circuit is composed of a power supply input control circuit, a protection circuit, an automatic testing control circuit and a manual testing control circuit; the input end of the power supply input control circuit is connected with an AC power supply input port on the shell body, the output end of the power supply input control circuit is respectively connected with the protection circuit and the manual testing control circuit, the protection circuit is connected with the automatic testing control circuit, the automatic testing control circuit and the manual testing control circuit are connected with a testing terminal and a counting display device on the shell body at the same time, and the counting display device is connected with a DC power supply input port. The mechanical life testing device has the characteristics that: the structural design is reasonable, and the operation is convenient; the mechanical life testing device is safe and reliable; the working efficiency is improved; the mechanical life testing device frees testing personnel from heavy labor; the testing time is shortened, the accuracy of the switching-in/off actions of the high-voltage switch is improved, and the measuring precision is ensured.
Description
Technical field
The utility model belongs to the surveying instrument field, especially a kind of high-voltage switch gear mechanical life test device.
Background technology
In order to guarantee the quality of high-voltage switch gear, high-voltage switch gear often need carry out mechanical endurance test.At present, the test method of high-voltage switch gear mechanical life is manual mode of operation, is promptly manually carried out branch, the closing operation of high-voltage switch gear in turn by many people, the number of times of manual record test simultaneously.This use manual mode of operation carries out mechanical endurance test and exists following shortcoming: 1. need manually carry out branch, closing operation to high-voltage switch gear during owing to test, its number of operations reaches several ten thousand times to hundreds of thousands, therefore, whole test is consuming time longer, and has increased the labour intensity of testing crew; 2. be subjected to artificial factor, to the bad grasp of the time interval of high-voltage switch gear branch, closing operation, the interval is long or too short at interval all can to exert an influence to measurement result, causes measurement result not accurate enough when test operation, simultaneously, artificial counting has also increased the probability that error occurs; 3. for a long time high-voltage switch gear is carried out branch, closing operation, to also being caused unnecessary damage by test agent.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, and a kind of high-voltage switch gear mechanical life test device that can carry out the accuracy of mechanical endurance test, raising test to high-voltage switch gear automatically and guarantee tested properties of sample is provided.
The utility model solves its technical matters and takes following technical scheme to realize:
A kind of high-voltage switch gear mechanical life test device; constitute by housing and inner control circuit thereof; on housing, be provided with the AC power input port; ac power switch; the direct supply input port; A.C. voltmeter; it is characterized in that: control circuit is by the power supply input control circuit; holding circuit; automatically test control circuit and manual test control circuit constitute; the input end of power supply input control circuit is connected with AC power input port on the housing; its output terminal is connected with holding circuit and manual test control circuit respectively; holding circuit and automatic testing circuit are connected; automatic testing circuit and manual test circuit are connected with calibrating terminal and counting display device on the housing simultaneously, and counting display device is connected with the direct supply input port.
And the structure of described control circuit is: the power supply input control circuit is made of first relay (Z1), power supply switch knob (SB1) and the power supply button (SB2) of operating a switch; Holding circuit is made of the 3rd time relay (P3) and second relay (Z2); Automatically test control circuit is connected and composed by very first time relay (P1), second time relay (P2), the 4th time relay (P4), the 5th time relay (P5), the 3rd relay (Z3), the 4th relay (Z4), the 5th relay (Z5), the 6th relay (Z6), the 7th relay (Z7), the 8th relay (Z8); The manual test control circuit is made of switch switch knob (SB3), switch opening button (SB4); The concrete annexation of control circuit is: first contact (Z1J-1) of first relay (Z1) of power supply input control circuit is installed in power supply switch knob (SB1) two ends, two other contact (Z1J-1 of first relay (Z1), Z1J-2) be connected to the AC power two ends, these two contact (Z1J-2, Z1J-3) respectively with very first time relay circuit, second time relay loop, the 3rd time relay loop, the 4th time relay loop, the 5th time relay loop, second relay circuit, the 3rd relay circuit, the 4th relay circuit, the 5th relay circuit, the 6th relay circuit, the 7th relay circuit, the 8th relay circuit is connected, wherein: second relay circuit is made of contact (P3J) and second relay (Z2) series connection of the 3rd time relay (P3), and the contact (Z2J) of second relay (Z2) is connected in the power supply input control circuit; Very first time relay circuit is made of first contact (Z4J-1) series connection of selector switch (K), very first time relay (P1), the 4th relay (Z4); Second time relay loop, the 3rd relay circuit, the 3rd time relay loop are by second time relay (P2) that is connected in parallel, the 3rd relay (Z3), the 3rd time relay (P3) formation of connecting with the contact (P1J) of the very first time relay (P1) at selector switch (K), switch switch knob (SB3) and two ends thereof; The 4th relay circuit is made of contact (P2J) series connection of second time relay (P2) at the 3rd contact (Z4J-3) of first contact (Z5J-1) of second contact (Z4J-2) of the 4th relay (Z4) at first contact (Z3J-1) of the 3rd relay (Z3) and two ends thereof, the 4th relay (Z4), the 5th relay (Z5), the 4th relay (Z4) and two ends thereof; The 4th time relay loop is made of contact (Z4J-4) and the 4th time relay (P4) series connection of the 4th relay (Z4); The 5th relay circuit is by contact (P4J), the selector switch (K) of the 4th time relay (P4) formation of connecting with the contact (Z6J) of the 5th relay (Z5), the 6th relay (Z6), and the 5th time relay loop is made of first contact (Z5J-1) of the 5th relay (Z5) and manual brake separating button (SB4), the 5th time relay (P5) series connection at two ends thereof; The 6th relay circuit is made of contact (P5J) series connection of the 6th relay (P6) and the 5th time relay (P5); The 7th relay circuit is made of second contact (Z8J-2) of the 8th relay (Z8), first contact (Z7J-1) and the 7th relay (Z7) series connection of the 7th relay (Z7), is connected with second contact (Z3J-2) of the 3rd relay (Z3) at second contact (Z8J-2) of the 8th relay (Z8), first contact (Z7J-1) two ends of the 7th relay (Z7); The 8th relay circuit is made of first contact (Z8J-1) of the 8th relay (Z8), second contact (Z7J-2) and the 8th relay (Z8) series connection of the 7th relay (Z7), is connected with second contact (Z3J-2) of the 5th relay (Z5) at first contact (Z8J-1) of the 8th relay (Z8), second contact (Z7J-2) two ends of the 7th relay (Z7); First contact (Z3J-1) of the 3rd relay (Z3), first contact (Z5J-1) of the 5th relay (Z5) are connected with calibrating terminal on the housing, second contact (Z3J-2) of the 3rd relay (Z3), second contact (Z5J-2) of the 5th relay (Z5) are connected with counting display device on the housing, and the power input of counting display device is connected with the direct supply input port.
And, the delay time of described very first time relay (P1) is 15 seconds, the delay time of described second time relay (P2) is 1 second, the delay time of described the 3rd time relay (P3) is 60 seconds, the delay time of described the 4th time relay (P4) is 2 seconds, and the delay time of described the 5th time relay (P5) is 1 second.
Advantage of the present utility model and good effect are:
1. this test instrument adopts the automatic test control circuit that is made of the time relay and auxiliary reclay, can carry out mechanical endurance test automatically to high-voltage switch gear, and by counting display device counting and demonstration automatically, when carrying out the high-voltage switch gear test, only need a people just operable automatically finish, reduce the labour intensity of testing crew widely, shortened the test period.
2. this test instrument can be controlled high-voltage switch gear branch, closing time automatically, and adopts counting display device counting and demonstration automatically, has therefore avoided manually-operated drawback, has improved the accuracy of measuring, and has guaranteed the precision of measurement result.
This test instrument can according to the high-voltage switch gear of different model to minute, closing time regulates, and can also manually carry out branch, closing operation under the situation of overtime scope, enlarged the scope of application of this test instrument.
4. be provided with holding circuit in the control circuit of this test instrument, when running into by test agent fault or physical damage, this holding circuit action, the test instrument automatic trip is cut off the power supply, and has guaranteed the security performance of this test instrument.
5. the utility model reasonable in design, easy to operate, safe and reliable and improved work efficiency, testing crew is freed from heavy labour, shorten test period, improved high-voltage switch gear branch, the accuracy of feed motion time, guaranteed measuring accuracy.
Description of drawings
Fig. 1 is a surface structure synoptic diagram of the present utility model;
Fig. 2 is the block scheme of control circuit;
Fig. 3 is the circuit diagram of control circuit.
Embodiment
Below in conjunction with accompanying drawing the utility model embodiment is further described:
This high-voltage switch gear mechanical life test device is made of housing and inner control circuit thereof, the surface structure of housing is provided with calibrating terminal 2, direct supply input port 3, AC power input port 6, A.C. voltmeter 4, ac power switch 8, power supply switch knob 7, power supply operate a switch selector switch 11, closing by hand button 13, manual brake separating button 12 and the counting display device 10 of button 9, time-delay adjusting knob 5, automatic or manual test as shown in Figure 1 on the panel 1 of housing.
As shown in Figure 2; control circuit in the housing is made of power supply input control circuit, holding circuit, automatic test control circuit and manual test control circuit; the input end of power supply input control circuit is connected with AC power input port on the housing; its output terminal is connected with holding circuit and manual test control circuit respectively; holding circuit and automatic testing circuit are connected; automatic testing circuit and manual test circuit are connected with calibrating terminal and counting display device on the housing simultaneously, and counting display device is connected with the direct supply input port.Power supply input control circuit in the above-mentioned control circuit, holding circuit, automatic test control circuit and manual test control circuit are its power supply by AC power, and counting display device is its power supply by direct supply.
As shown in Figure 3, the structure of the control circuit in the housing is: the power supply input control circuit is made of first relay (Z1), power supply switch knob (SB1) and the power supply button (SB2) of operating a switch; Holding circuit is made of the 3rd time relay (P3) and second relay (Z2); Automatically test control circuit is connected and composed by very first time relay (P1), second time relay (P2), the 4th time relay (P4), the 5th time relay (P5), the 3rd relay (Z3), the 4th relay (Z4), the 5th relay (Z5), the 6th relay (Z6), the 7th relay (Z7), the 8th relay (Z8); The manual test control circuit is made of switch switch knob (SB3), switch opening button (SB4); The concrete annexation of control circuit is: first contact (Z1J-1) of first relay (Z1) of power supply input control circuit is installed in power supply switch knob (SB1) two ends, two other contact (Z1J-1 of first relay (Z1), Z1J-2) be connected to the AC power two ends, these two contact (Z1J-2, Z1J-3) respectively with very first time relay circuit, second time relay loop, the 3rd time relay loop, the 4th time relay loop, the 5th time relay loop, second relay circuit, the 3rd relay circuit, the 4th relay circuit, the 5th relay circuit, the 6th relay circuit, the 7th relay circuit, the 8th relay circuit is connected, wherein: second relay circuit is made of contact (P3J) and second relay (Z2) series connection of the 3rd time relay (P3), and the contact (Z2J) of second relay (Z2) is connected in the power supply input control circuit; Very first time relay circuit is made of first contact (Z4J-1) series connection of selector switch (K), very first time relay (P1), the 4th relay (Z4); Second time relay loop, the 3rd relay circuit, the 3rd time relay loop are by second time relay (P2) that is connected in parallel, the 3rd relay (Z3), the 3rd time relay (P3) formation of connecting with the contact (P1J) of the very first time relay (P1) at selector switch (K), switch switch knob (SB3) and two ends thereof; The 4th relay circuit is made of contact (P2J) series connection of second time relay (P2) at the 3rd contact (Z4J-3) of first contact (Z5J-1) of second contact (Z4J-2) of the 4th relay (Z4) at first contact (Z3J-1) of the 3rd relay (Z3) and two ends thereof, the 4th relay (Z4), the 5th relay (Z5), the 4th relay (Z4) and two ends thereof; The 4th time relay loop is made of contact (Z4J-4) and the 4th time relay (P4) series connection of the 4th relay (Z4); The 5th relay circuit is by contact (P4J), the selector switch (K) of the 4th time relay (P4) formation of connecting with the contact (Z6J) of the 5th relay (Z5), the 6th relay (Z6), and the 5th time relay loop is made of first contact (Z5J-1) of the 5th relay (Z5) and manual brake separating button (SB4), the 5th time relay (P5) series connection at two ends thereof; The 6th relay circuit is made of contact (P5J) series connection of the 6th relay (P6) and the 5th time relay (P5); The 7th relay circuit is made of second contact (Z8J-2) of the 8th relay (Z8), first contact (Z7J-1) and the 7th relay (Z7) series connection of the 7th relay (Z7), is connected with second contact (Z3J-2) of the 3rd relay (Z3) at second contact (Z8J-2) of the 8th relay (Z8), first contact (Z7J-1) two ends of the 7th relay (Z7); The 8th relay circuit is made of first contact (Z8J-1) of the 8th relay (Z8), second contact (Z7J-2) and the 8th relay (Z8) series connection of the 7th relay (Z7), is connected with second contact (Z3J-2) of the 5th relay (Z5) at first contact (Z8J-1) of the 8th relay (Z8), second contact (Z7J-2) two ends of the 7th relay (Z7); First contact (Z3J-1) of the 3rd relay (Z3), first contact (Z5J-1) of the 5th relay (Z5) are connected with calibrating terminal on the housing, second contact (Z3J-2) of the 3rd relay (Z3), second contact (Z5J-2) of the 5th relay (Z5) are connected with counting display device on the housing, and the power input of counting display device is connected with the direct supply input port.
Wherein, the delay time of the above-mentioned used time relay is as follows: the delay time of described very first time relay (P1) is 15 seconds, the delay time of described second time relay (P2) is 1 second, the delay time of described the 3rd time relay (P3) is 60 seconds, the delay time of described the 4th time relay (P4) is 2 seconds, and the delay time of described the 5th time relay (P5) is 1 second.
Principle of work of the present utility model is as follows:
Tested high-voltage switch gear is linked into this test instrument by calibrating terminal, after opening ac power switch and pressing the power supply switch knob, make the energising of relay Z1 wire loop, closed and the self-sustaining of its first contact (Z1J-1), its two other contact (Z1J-2, Z1J-3) are connected and are the entire circuit power supply.At this moment, test instrument has possessed the condition of automatic " close, divide " high-voltage switch gear coil power supply action and the condition of manual " close, divide " high-voltage switch gear coil power supply action, carry out the selection of automatic or manual mode by the selector switch (K) of stirring on the housing, be automatic test method when the selector switch of closing (K), and be manual test method when opening selector switch (K).
1. " close, divide " high-voltage switch gear coil power supply course of action is automatically:
As the selector switch of closing (K), time relay P1 (15 seconds) has, form the loop (from this end that picks up counting by Z4J-1 contact (the long contact that closes), as: high-voltage switch gear every " close, divide " once needs 15 seconds), it is closed that the contact P1J of time relay P1 begins action, powers simultaneously for following three the road:
(1). time relay P3 (60 seconds) has electricity (this time can be regulated arbitrarily) between 0～60 second, when test instrument " closes " brake cable circle power supply overtime for high-voltage switch gear (because closing coil is can not conduction time long, coil directly hinders too little, heating damages easily, enough time heat radiations should be arranged in addition) in 15S, the contact P3J closure of time relay P3, second relay circuit is had, thereby the contact Z2J of relay Z2 becomes off-state the power supply input control circuit is disconnected from the long state that closes, and power supply is stopped power supply.
(2). relay Z3 coil has, its length is opened the calibrating terminal that contact Z3J-1 is connected on the test instrument outside, make direct current or AC power close a floodgate for tested high-voltage switch gear coil power supply through its long contact Z3J-1 that opens, contact Z3J-1 becomes closure by long opening, for relay Z4 coil power supply is prepared, contact Z3J-2 becomes closure by long opening, and makes relay Z7 coil that electricity be arranged, the counting and the demonstration of closing a floodgate by counting display device.
(3). there is electricity (for closing coil length conduction time is regulated arbitrarily at 0～30S) in time relay P2 (1 second) loop, the contact P2J action of time relay P2 has relay Z4 coil, two contact Z4J-2 among the relay P4, Z4J-3 becomes closure state and self-sustaining, contact Z4J-1 in the very first time relay P1 loop becomes disconnection by long closing, another contact Z4J-4 contact of relay P4 becomes closure by long opening, the 4th time relay loop is had, impel its contact P4J action, make relay Z5 action, its contact Z5J-1 is disconnected, make relay Z5 coil blackout, the contact Z5J-2 of relay Z5 is become closure and is made relay Z8 action by long opening, and carries out the counting and the demonstration of separating brake by counting display device.Another contact Z5J-1 of relay Z5 is become closure time relay P5 is had by long opening; at this moment contact P4J action makes relay Z8 action; impel contact Z8J-1 to become disconnection (time relay P1 is picked up counting from this starting point) by long closing; contact Z8J-1 plays test instrument again and gives high-voltage switch gear " branchs " brake cable circle power-on time long (can not conduction time long because of closing coil; coil directly hinders too little; easily heating damages, and enough time heat radiations should be arranged in 15S in addition) protective effect.The every 15S of formation high-voltage switch gear that goes round and begins again like this " closes, divides " once.
2. manual " close, divide " high-voltage switch gear coil power supply operating principle:
Tested high-voltage switch gear is linked into this test instrument by calibrating terminal, after opening ac power switch and pressing the power supply switch knob, make the energising of relay Z1 wire loop, its first contact (Z1J-1) is closed and keeps that its two other contact (Z1J-2, Z1J-3) is connected and is the entire circuit power supply.After opening selector switch (K), can be by pressing switch switch knob SB3 and the switch opening button SB4 on the housing, high-voltage switch gear just can move, and counts and show by counting display device.
It is emphasized that; embodiment described in the utility model is illustrative; rather than it is determinate; therefore the utility model is not limited to the embodiment described in the embodiment; every by those skilled in the art according to other embodiments that the technical solution of the utility model draws, belong to the scope of the utility model protection equally.
Claims (3)
1. high-voltage switch gear mechanical life test device; constitute by housing and inner control circuit thereof; on housing, be provided with the AC power input port; ac power switch; the direct supply input port; A.C. voltmeter; it is characterized in that: control circuit is by the power supply input control circuit; holding circuit; automatically test control circuit and manual test control circuit constitute; the input end of power supply input control circuit is connected with AC power input port on the housing; its output terminal is connected with holding circuit and manual test control circuit respectively; holding circuit and automatic testing circuit are connected; automatic testing circuit and manual test circuit are connected with calibrating terminal and counting display device on the housing simultaneously, and counting display device is connected with the direct supply input port.
2. high-voltage switch gear mechanical life test device according to claim 1 is characterized in that: the structure of described control circuit is: the power supply input control circuit is made of first relay (Z1), power supply switch knob (SB1) and the power supply button (SB2) of operating a switch; Holding circuit is made of the 3rd time relay (P3) and second relay (Z2); Automatically test control circuit is connected and composed by very first time relay (P1), second time relay (P2), the 4th time relay (P4), the 5th time relay (P5), the 3rd relay (Z3), the 4th relay (Z4), the 5th relay (Z5), the 6th relay (Z6), the 7th relay (Z7), the 8th relay (Z8); The manual test control circuit is made of switch switch knob (SB3), switch opening button (SB4); The concrete annexation of control circuit is: first contact (Z1J-1) of first relay (Z1) of power supply input control circuit is installed in power supply switch knob (SB1) two ends, two other contact (Z1J-1 of first relay (Z1), Z1J-2) be connected to the AC power two ends, these two contact (Z1J-2, Z1J-3) respectively with very first time relay circuit, second time relay loop, the 3rd time relay loop, the 4th time relay loop, the 5th time relay loop, second relay circuit, the 3rd relay circuit, the 4th relay circuit, the 5th relay circuit, the 6th relay circuit, the 7th relay circuit, the 8th relay circuit is connected, wherein: second relay circuit is made of contact (P3J) and second relay (Z2) series connection of the 3rd time relay (P3), and the contact (Z2J) of second relay (Z2) is connected in the power supply input control circuit; Very first time relay circuit is made of first contact (Z4J-1) series connection of selector switch (K), very first time relay (P1), the 4th relay (Z4); Second time relay loop, the 3rd relay circuit, the 3rd time relay loop are by second time relay (P2) that is connected in parallel, the 3rd relay (Z3), the 3rd time relay (P3) formation of connecting with the contact (P1J) of the very first time relay (P1) at selector switch (K), switch switch knob (SB3) and two ends thereof; The 4th relay circuit is made of contact (P2J) series connection of second time relay (P2) at the 3rd contact (Z4J-3) of first contact (Z5J-1) of second contact (Z4J-2) of the 4th relay (Z4) at first contact (Z3J-1) of the 3rd relay (Z3) and two ends thereof, the 4th relay (Z4), the 5th relay (Z5), the 4th relay (Z4) and two ends thereof; The 4th time relay loop is made of contact (Z4J-4) and the 4th time relay (P4) series connection of the 4th relay (Z4); The 5th relay circuit is by contact (P4J), the selector switch (K) of the 4th time relay (P4) formation of connecting with the contact (Z6J) of the 5th relay (Z5), the 6th relay (Z6), and the 5th time relay loop is made of first contact (Z5J-1) of the 5th relay (Z5) and manual brake separating button (SB4), the 5th time relay (P5) series connection at two ends thereof; The 6th relay circuit is made of contact (P5J) series connection of the 6th relay (P6) and the 5th time relay (P5); The 7th relay circuit is made of second contact (Z8J-2) of the 8th relay (Z8), first contact (Z7J-1) and the 7th relay (Z7) series connection of the 7th relay (Z7), is connected with second contact (Z3J-2) of the 3rd relay (Z3) at second contact (Z8J-2) of the 8th relay (Z8), first contact (Z7J-1) two ends of the 7th relay (Z7); The 8th relay circuit is made of first contact (Z8J-1) of the 8th relay (Z8), second contact (Z7J-2) and the 8th relay (Z8) series connection of the 7th relay (Z7), is connected with second contact (Z3J-2) of the 5th relay (Z5) at first contact (Z8J-1) of the 8th relay (Z8), second contact (Z7J-2) two ends of the 7th relay (Z7); First contact (Z3J-1) of the 3rd relay (Z3), first contact (Z5J-1) of the 5th relay (Z5) are connected with calibrating terminal on the housing, second contact (Z3J-2) of the 3rd relay (Z3), second contact (Z5J-2) of the 5th relay (Z5) are connected with counting display device on the housing, and the power input of counting display device is connected with the direct supply input port.
3. high-voltage switch gear mechanical life test device according to claim 2, it is characterized in that: the delay time of described very first time relay (P1) is 15 seconds, the delay time of described second time relay (P2) is 1 second, the delay time of described the 3rd time relay (P3) is 60 seconds, the delay time of described the 4th time relay (P4) is 2 seconds, and the delay time of described the 5th time relay (P5) is 1 second.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009200957243U CN201364378Y (en) | 2009-03-03 | 2009-03-03 | Mechanical life testing device of high-voltage switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009200957243U CN201364378Y (en) | 2009-03-03 | 2009-03-03 | Mechanical life testing device of high-voltage switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201364378Y true CN201364378Y (en) | 2009-12-16 |
Family
ID=41475046
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2009200957243U Expired - Lifetime CN201364378Y (en) | 2009-03-03 | 2009-03-03 | Mechanical life testing device of high-voltage switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201364378Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104076277A (en) * | 2014-07-17 | 2014-10-01 | 国家电网公司 | Tripping-prevention loop testing device for breaker |
| CN104142468A (en) * | 2013-05-08 | 2014-11-12 | 深圳市海洋王照明工程有限公司 | Switch performance testing circuit |
-
2009
- 2009-03-03 CN CNU2009200957243U patent/CN201364378Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104142468A (en) * | 2013-05-08 | 2014-11-12 | 深圳市海洋王照明工程有限公司 | Switch performance testing circuit |
| CN104076277A (en) * | 2014-07-17 | 2014-10-01 | 国家电网公司 | Tripping-prevention loop testing device for breaker |
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Owner name: STATE ELECTRIC NET CROP. Free format text: FORMER OWNER: TIANJIN ELECTRIC POWER CORP. Effective date: 20130521 Owner name: TIANJIN ELECTRIC POWER CORP. Effective date: 20130521 |
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