CN201281748Y - Tester for performance characteristic of direct current circuit breaker - Google Patents
Tester for performance characteristic of direct current circuit breaker Download PDFInfo
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- CN201281748Y CN201281748Y CNU2008201160135U CN200820116013U CN201281748Y CN 201281748 Y CN201281748 Y CN 201281748Y CN U2008201160135 U CNU2008201160135 U CN U2008201160135U CN 200820116013 U CN200820116013 U CN 200820116013U CN 201281748 Y CN201281748 Y CN 201281748Y
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Abstract
The utility model discloses a performance characteristic testing instrument of a DC circuit breaker, which comprises a mains switch, an AC/DC power supply module, a current transformator, a voltage sample circuit, a signal processing control unit, an LCD, a host computer, a keyboard, a load control unit, a positive output of a test set and a negative output of the test set. The load control unit adopts the 8421 array load technology, and the zero clearance adjustment of current can be realized. The performance characteristic testing instrument can perform a circuit level difference test, any current operated curve test of a single DC circuit breaker, sequential current tests and optional current test, also can automatically set the restoring time and increase the test efficiency thereof and the test of the intermediate resistance of the DC circuit breaker, etc. A portable measuring instrument is provided to the DC circuit breaker performance characteristic of a direct current supply circuit in a power industry substation, and the difficult problem of field measurement of the DC circuit breaker performance characteristic is solved.
Description
Application of the present utility model
The utility model relates to a kind of tester for testing operating characteristics of DC circuit breaker device that is applicable to that the overcurrent protection of transforming plant DC electric power loop is used.
Technical background of the present utility model
The dc power supply circuit protection all was to adopt the element as loop protection, protection for feed line, load protection such as fuse, AC circuit breaker, dc circuit breaker in the past.Along with the dc circuit breaker technology improves constantly; the requirement of power grid security level is constantly harsh; State Grid Corporation of China has stipulated the necessary dc circuit breaker that adopts of dc power supply circuit protection, forbids AC circuit breaker to be applied in the direct current power supply loop, forbids alternating current-direct current isolating switch and fuse to be used with.Dc circuit breaker has characteristics such as reliable in action, simple to operate, easy-to-connect, fault recovery be fast, thereby obtains people's generally approval.From the extremely final load end of direct supply bus, generally will be through the protection of 3-4 level.Because of operating characteristics of DC circuit breaker does not match, can not satisfy selective protection between the superior and the subordinate, often because general short trouble, cause the superior and the subordinate's action of bypassing the immediate leadership, expansion accident scope.In order to solve dc circuit breaker selectivity matching problem between the superior and the subordinate, power industry has been formulated in the DL/T5044-2004 standard " power engineering straight-flow system designing technique rules " and has clearly been stipulated the protection action current of dc circuit breakers at different levels and actuation time should satisfy the selectivity requirement.Use brand dc circuit breakers such as more " Siemens " that import is arranged, " MGE ", " ABB ", " Schneider " at present, brand dc circuit breakers such as homemade " Guan County is auspicious ", " sky just ", " China is logical " are also arranged, and differentiation has reached the hundreds of kind on its brand and current specification and the acting characteristic.Because each dc circuit breaker producer brand is more, acting characteristic is inconsistent, and acting characteristic curve that it provides and actual act family curve difference are in service in real work, the action event of bypassing the immediate leadership of the superior and the subordinate's dc circuit breaker mismatees often occurred.
Power industry improves the operation of power networks level in order to strengthen the power transformation technical management, the minimizing accident, and standard is to the operational management of direct supply.In October, 2005, State Grid Corporation of China formulated enterprise's regulation and standards such as " 18 counter arranging of safety of national grid ", " DC power system equipment evaluation and analysis standard "." dc circuit breaker should carry out action current and acting characteristic sampling observation before using " clearly proposed; require Utilities Electric Co.s at different levels will protect the acting characteristic test to the dc circuit breaker in its loop when straight-flow system that newly puts into operation or overhaul of the equipments, i.e. the drop-away time test of isolating switch under different short-circuit currents is determined in acting characteristic test.The correctness that prevents direct current to bypass the immediate leadership action produces protection dc circuit breaker loop the superior and the subordinate is selected to cooperate.
Up to the present, the surveying instrument of dc circuit breaker all is to carry out in testing laboratory and manufacturer, and its relevant testing tool all is to adopt " manual intervention calculating ".Employing equipment mainly is large-scale charging set, direct current cabinet, battery pack, millisecond meter, wave tracer or the like.There is following problem in this characteristic test instrument:
1, equipment heaviness can not be portable, is difficult for on-the-spot use the between each transformer station.
2, can not accurately regulate action current, measuring accuracy is poor.
3, the volume change of accumulator causes that internal resistance changes, and causes action current that notable difference is arranged.
4, operation curve needs artificial the drafting, poor accuracy, and workload is big.
5, adopt plurality of devices synthetic, wiring complexity, poor stability.
Summary of the invention of the present utility model
The purpose of this utility model
The purpose of this utility model is to be to provide a kind of Portable DC isolating switch operation curve testing tool for power industry transformer station direct current system scene.
Technical solutions of the utility model
In order to achieve the above object, utility model is achieved in that Portable DC breaker operating characteristic testing tool comprises: 1, power switch; 2, AC/DC power module; 3, current transformer; 4, voltage sampling circuit; 5 signal processing control unit; 6 LCD; 7 host computers; 8 keyboards; 9 load control units; The positive output of 10 testing tools; The negative output of 11 testing tools.Power switch 1 input termination 220V AC power; The input end of power switch 1 output terminal and AC/DC power module 2 joins; "+" output terminal of AC/DC power module 2 passes the electric current loop of current transformer 3, and current transformer is to adopt the core-theaded type current transformer; The input end of AC/DC power module 2 the 2nd output terminal and voltage sampling circuit 4 joins; The output terminal of current transformer 3 and Measurement and analysis unit 5 input ends join; Voltage sample loop 4 output terminals and Measurement and analysis unit 5 input ends are mutually and connect; Measurement and analysis unit 5 output terminals 1 and LCD 6 input ends join; Measurement and analysis unit 5 output terminals 2 and host computer 7 join, and host computer can adopt desk-top computer also can adopt notebook computer; Measurement and analysis unit 5 output terminals 3 and keyboard 8 join; "+" output terminal of AC/DC power module 2 passes behind the electric current loop of current transformer 3 and the input end 1 of load control unit 9 joins; The input end 2 of load control unit 9 and the output terminal 4 of Measurement and analysis unit 5 join.The output terminal of load control unit 9 and tester positive output end 10 join; "-" output terminal of AC/DC power module 2 and the negative output terminal 11 of tester join.The utility model is compared with tester for testing operating characteristics of DC circuit breaker device of the prior art and tester for testing operating characteristics of DC circuit breaker product in the past, has following advantage:
1, safe and reliable, do not need to be with any protective device.
The test voltage of this testing tool is direct current DC+6V only, and maximum current reaches 1500A; The voltage of direct current DC+6V is lower than world security voltage 36V, so be an operating voltage that is perfectly safe.It can not cause any personal injury problem, and hot line job is also without any problem.The test of some isolating switch need be carried out under bare state, and adopting this testing tool is in the scope of being perfectly safe, and does not need to be with any protective device arbitrarily to test, and can not damage personal safety.
2, this instrument test is adapted to the dc circuit breaker of any brand type.
Dc circuit breaker is distinguished from operating characteristic, and the most frequently used have A, B, four kinds of operating characteristic of C, D, and the rated current specification has 1A, 2A, 3A, 5A, 6A, 10A, 12A, 16A, 20A, 25A, 30A, 40A, 45A, 50A, 63A, 100A several respectively.The A characteristic dc circuit breaker is represented less than snap action (quick-action)≤10ms under 5 times of rated current, the B characteristic dc circuit breaker is illustrated in snap action≤10ms under the 3-7 times of rated current, C characteristic dc circuit breaker is illustrated in snap action≤10ms under the 5-10 times of rated current, and the D characteristic dc circuit breaker is illustrated in greater than snap action≤10ms under 10 times of rated current.This tester maximum current reaches 1500A (instantaneous greater than 10ms), so measuring current and can satisfy the dc circuit breaker of existing regular size model on the time fully.
3, whole testing tool weight can be carried to the on-the-spot use of any transformer station less than 30kg.
This testing tool adopts luxurious aluminium alloy case to make extranal packing box, and outer aluminium alloy packing both sides are provided with handle, are provided with four small wheels under the case, are convenient to move, transport, and overall weight is less than 30kg, and two people just can lift.Can do test at arbitrary transformer station scene, the employing direct current cabinet before having solved is done power supply need attach the disadvantage that equipment such as millisecond meter, load box, wave tracer can't on-the-spot traverse measurement.
4, the testing tool upper computer software can finish automatically tested dc circuit breaker operation curve and can and the country
Standard and international standard defined curve are compared.
Tested dc circuit breaker is after the test of this testing tool, action current under its various electric currents and time curve relation, can on the upper computer software interface, show automatically, the host computer curve map can also be done reference according to specified standard curve in national GB/T14048.1-2000 or the international IEC60898.1-2003 standard, compare with the actual measurement profile data, judge accurately whether its operation curve is qualified.The dc circuit breaker in relevant loop can be determined that the superior and the subordinate between its loop are differential and whether have selective protection after the test of this testing tool whether can produce the action phenomenon of bypassing the immediate leadership, can improve the security level of power system transformer substation direct supply effectively.
The utility model accompanying drawing
In order better to further specify, below accompanying drawing described in detail.
Accompanying drawing 1, testing tool scantling plan
Accompanying drawing 2, the utility model load and Current Control figure
The operating characteristics of DC circuit breaker curve map of accompanying drawing 3, computer software testing
Concrete enforcement of the present utility model
Below in conjunction with accompanying drawing the utility model is given detailed explanation
This testing tool totally comprises: 1, power switch; 2, AC/DC power module; 3, current transformer; 4, voltage sampling circuit; 5, signal processing control unit; 6, LCD; 7, host computer; 8, keyboard; 9, load control unit; 10, the positive output of testing tool; 11, the negative output of testing tool.The general structure block diagram of this testing tool shown in Fig. 1, main circuit is connected to: power switch 1 input termination 220V AC power; The input end of power switch 1 output terminal and AC/DC power module 2 joins; "+" output terminal of AC/DC power module 2 passes the electric current loop of current transformer 3, and current transformer is to adopt the core-theaded type current transformer; AC/DC power module 2 the 2nd output terminal and voltage sampling circuit 4 input ends join; The output terminal of current transformer 3 and Measurement and analysis unit 5 input ends join; Voltage sample loop 4 output terminals and Measurement and analysis unit 5 input ends are mutually and connect; Measurement and analysis unit 5 output terminals 1 and LCD 6 input ends join; Measurement and analysis unit 5 output terminals 2 and host computer 7 join, and host computer can adopt desk-top computer also can adopt notebook computer; Measurement and analysis unit 5 output terminals 3 and keyboard 8 join; "+" output terminal of AC/DC power module 2 passes behind the electric current loop of current transformer 3 and the input end 1 of load control unit 9 joins; The input end 2 of load control unit 9 and the output terminal 4 of Measurement and analysis unit 5 join.The output terminal of load control unit 9 and tester positive output end 10 join; "-" output terminal of AC/DC power module 2 and the negative output terminal 11 of tester join.Power switch adopts the AC circuit breaker of DZ47/20A-2P the two poles of the earth C characteristic; AC/DC power module 2 adopts high frequency switch powers, and it is input as 220VAC, 50HZ, is output as 1500A (instantaneous time reaches 15ms) 1000A for long-time, and voltage is 6VDC; It is TBC300LTA brand KEN producer that current transformer 3 adopts core-theaded type current transformer models: sensing Science and Technology Ltd. suddenly in the Nanjing, and it is 0-1500A that current measuring range can be provided, and is output as 0-5V; Voltage sampling circuit 4 voltage measurement scopes are 0-15V, and output voltage is 0-5V; It is primary processor that Measurement and analysis unit 5 adopts single chip computer AT 89S58, and like special Mel brand, feature: the AT89S58 single-chip microcomputer is a kind of low-power consumption, high-performance CMOS 8 8-digit microcontrollers, and 40 pins have 8K system programmable Flash storer; Adopt the USB interface communication between Measurement and analysis unit 5 and the host computer 7; Keyboard 8 comprises " 0 ", " 1 ", " 2 ", " 3 ", " 4 ", " 5 ", " 6 ", " 7 ", " 8 ", " 9 " ten digital keys, " backlight " button, " a returning " button, " time set " button, " a determining " button, with " electric current " button, 10 numeric keys is to realize the numeral setting, " backlight " button is realized closing and opening of display backlight, " determine " that button is that the data that expression sets determine that " electric current " button indication is set the measuring current of required generation; 5 pairs of required measuring currents of keyboard input of signal processing control unit have realized testing current by load control unit 9, the relevant test data of tested dc circuit breaker is all handled preservation by signal processing control unit 5, and can deliver to host computer 7 in real time.Signal processing control unit 5 also shows relevant measurement data by LCD 6 in real time; LCD 6 adopts the model of MGLS10032B, and brand is a Shenzhen blue moon Science and Technology Ltd.; Positive output end 10 adopts red connection terminal, and terminal diameter is greater than 20mm; Negative output terminal 11 adopts black connection terminal terminal, and terminal diameter is greater than 20mm.
The test of traditional operating characteristics of DC circuit breaker is exactly with tested dc circuit breaker serial connection reometer, load (generally adopting adjustable resistor) produces electric current, regulate needed electric current, power supply generally is to be taken from direct current cabinet, connect tested dc circuit breaker and adopt millisecond meter and wave tracer, calculate dc circuit breaker and disconnect the needed time from reaching rated current to action, actuation time and electric current are generated coordinate, the resistance of re-adjustments load, measure the time (under the rated current) that different electric current takes place, all data that measure are plotted on the figure also connect formation operating characteristics of DC circuit breaker curve map about a point that measures.The figure of this artificial drafting generally can produce bigger error, curve plotting figure also is very big workload, the electric current of test also very is difficult to regulate accurately, so always being, this work very do not carry out to standard, what caused is exactly that the safety of electrical network is brought certain hidden danger, is that people are concerned about always, only because measuring process not have the ideal tools of being correlated with, work be difficult to carry out, traditional test very loaded down with trivial details again time-consuming due to.
Fig. 2: the utility model embodiment is a load control circuit 9, and its feature also is: load control circuit 9 adopts 8421 array techniques, can realize that the no gap of electric current is regulated, and the load control circuit 9 to accompanying drawing 2 describes below.Comprising, switching tube P1, P2, P3, P4, P5, P6, P7, D.C. contactor J1, J2, J3, J4, J5, J6, resistance R 1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12.Its circuit is connected to: 4 output terminals of signal processing control unit 5 respectively with input end of coil of the B utmost point of switching tube P1, P2, P3, P4, P5, P6, P7 and D.C. contactor J1, J2, J3, J4, J5, J6 mutually and connect; Another input end grounding of the coil of D.C. contactor J1, J2, J3, J4, J5, J6; The normal end of making war of the C utmost point of switching tube P1, P2, P3, P4, P5, P6, P7 and the output of D.C. contactor J1, J2, J3, J4, J5 pass behind the electric current loop of current transformer 3 with the positive output end of AC/DC power module 2 mutually and connect.The E utmost point and the resistance R 1 of switching tube P1 are joined; The E utmost point and the resistance R 2 of switching tube P2 are joined; The E utmost point and the resistance R 3 of switching tube P3 are joined; The E utmost point and the resistance R 4 of switching tube P4 are joined; The E utmost point and the resistance R 5 of switching tube P5 are joined; The E utmost point and the resistance R 6 of switching tube P6 are joined; The E utmost point and the resistance R 7 of switching tube P7 are joined; The other end and the resistance R 8 of D.C. contactor J1 normal opened contact are joined; The other end and the resistance R 9 of D.C. contactor J2 normal opened contact are joined; The other end and the resistance R 10 of D.C. contactor J3 normal opened contact are joined; The other end and the resistance R 11 of D.C. contactor J4 normal opened contact are joined; The other end and the resistance R 12 of D.C. contactor J5 normal opened contact are joined; The other end of resistance R 1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12 with tester negative output terminal 11 mutually and connect, through signal processing control unit 5 with handle syntheticly, realize no gap Current Regulation.Resistance R 1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, its model of R12 are the RX24-50 series resistance, and resistance value and power are decided to need to realize electric current and power.Produce the electric current of 1A as resistance R 1 through the control of P1, the resistance R1=U/I=6/1=6 Ω of resistance R 1 wherein is more than the power 6W; Resistance R 2 produces the electric current of 2A through the control of P2, and the resistance R2=U/I=6/2=3 Ω of resistance R 2 wherein is more than the power 12W; Resistance R 3 produces the electric current of 4A through the control of P3, and the resistance R3=U/I=6/4=1.5 Ω of resistance R 3 wherein is more than the power 24W; Resistance R 4 produces the electric current of 8A through the control of P4, and the resistance R4=U/I=6/8=0.75 Ω of resistance R 4 wherein is more than the power 48W; The resistance of resistance R 5 is 0.375 Ω, more than the power 96W; The resistance of R6 is 0.1875 Ω, more than the power 192W; The resistance of R7 is 0.09375 Ω, more than the power 384W; The resistance of resistance R 8 is 0.06 Ω, power 600W; The resistance of resistance R 9 is 0.03 Ω, more than the power 1200W; The resistance of resistance R 10 is 0.015 Ω, more than the power 2400W; The resistance of resistance R 7 is 0.015 Ω, more than the power 2400W; The resistance of resistance R 12 is 0.015 Ω, more than the power 2400W; The power of above resistance can adopt the same resistance of 50W to come in parallel the realization.The electric current that for example will obtain a 10A then only needs control signal processing and control element (PCE) 5 conducting R4 and R2, just can realize; The electric current that obtains a 120A only needs control signal processing and control element (PCE) 5 conducting R8, R5 and R3 just can realize.Switching tube adopts STP80N06-10 type, VDSS=60V, RDS (ON)＜0.010 Ω, maximum controlling current 80A; D.C. contactor adopts GSZ2-100S single-stage D.C. contactor, rated operational current 500A.Mainly be to consider,, just adopt D.C. contactor greater than the 80A electric current with the electric current of 64A maximum dropout current 80A less than switching tube from cost, volume weight.
Fig. 3: the utility model embodiment is: the operating characteristics of DC circuit breaker curve map of computer software testing.As Fig. 3, two black lines are the intrinsic protection feature curve of dc circuit breaker in the acting characteristic test pattern that upper computer software is tested.These two curves come from standard GB/T14048.1-2000 or international standard IEC60898.1-2003; its intrinsic protection feature curve of different dc circuit breakers is different; be the dc circuit breaker of C characteristic among its figure, dropout current is a 5-10 times of snap action.Ordinate T represents the isolating switch switch off time; The ratio of horizontal ordinate (I/In) expression actual measurement electric current and tested isolating switch rated current, carry out dc circuit breaker when test according to different measuring currents, measure switch off time, as the upper right corner among the figure: 1, ratio I/the In=2.55 of actual measurement electric current and tested isolating switch rated current, switch off time T=11.71S; 2, the ratio I/In=7 of actual measurement electric current and tested isolating switch rated current, switch off time T=0.802S; 3, the ratio I/In=5 of actual measurement electric current and tested isolating switch rated current, switch off time T=1.689S; 4, the ratio I/In=8.5 of actual measurement electric current and tested isolating switch rated current, switch off time T=0.467S; 5, the ratio I/In=10 of actual measurement electric current and tested isolating switch rated current, switch off time T=0.191S.Adopt five kinds of color showings, corresponding test point arranged in two curve maps, test result drop in the middle of these two family curves (as among the figure some), show that then the isolating switch that carries out characteristic test meets the demands.If test result has dropped on outside these two curves, show that the isolating switch that carries out characteristic test is defective.
Claims (2)
1, a kind of tester for testing operating characteristics of dc circuit breaker; This proving installation is by power switch (1); AC/DC power module (2); Current transformer (3); Voltage sampling circuit (4); Signal processing control unit (5); LCD (6); Host computer (7); Keyboard (8); Load control unit (9); Proving installation positive output (10); Proving installation negative output (11) constitutes; It is characterized by: power switch (1) input termination 220V AC power; The input end of power switch (1) output terminal and AC/DC power module (2) joins; "+" output terminal of AC/DC power module (2) passes the electric current loop of current transformer (3), and current transformer is the current transformer that adopts core-theaded type; The input end of 2 output terminals of AC/DC power module (2) and voltage sampling circuit (4) joins; The output terminal of current transformer (3) and Measurement and analysis unit (5) input end join; Voltage sample loop (4) output terminal and Measurement and analysis unit (5) input end are mutually and connect; 1 output terminal of Measurement and analysis unit (5) and LCD (6) input end join; 2 output terminals of Measurement and analysis unit (5) and host computer (7) join; 3 output terminals of Measurement and analysis unit (5) and keyboard (8) join; "+" output terminal of AC/DC power module (2) passes behind the electric current loop of current transformer (3) and 1 input end of load control unit (9) joins; 4 output terminals of 2 input ends of load control unit (9) and Measurement and analysis unit (5) join; The output terminal of load control unit (9) and tester positive output end (10) join; "-" output terminal of AC/DC power module (2) and tester negative output terminal (11) join.
2, tester for testing operating characteristics according to right 1 described dc circuit breaker, it is characterized in that: load control unit (9), comprising: switching tube (P1), switching tube (P2), switching tube (P3), switching tube (P4), switching tube (P5), switching tube (P6), switching tube (P7), D.C. contactor (J1), D.C. contactor (J2), D.C. contactor (J3), D.C. contactor (J4), D.C. contactor (J5), D.C. contactor (J6), resistance (R1), D.C. contactor (R2), D.C. contactor (R3), D.C. contactor (R4), D.C. contactor (R5), D.C. contactor (R6), D.C. contactor (R7), D.C. contactor (R8), D.C. contactor (R9), D.C. contactor (R10), D.C. contactor (R11), D.C. contactor (R12); Resistance adopts model RX24-50, and switching tube adopts the STP80N06-10 type; D.C. contactor adopts GSZ2-100S single-stage D.C. contactor; It is characterized by: 4 output terminals of signal processing control unit (5) respectively with the input end of the coil of the B utmost point of switching tube (P1), switching tube (P2), switching tube (P3), switching tube (P4), switching tube (P5), switching tube (P6), switching tube (P7) and D.C. contactor (J1), D.C. contactor (J2), D.C. contactor (J3), D.C. contactor (J4), D.C. contactor (J5), D.C. contactor (J6) mutually and connect; Another input end grounding of coil of D.C. contactor (J1), D.C. contactor (J2), D.C. contactor (J3), D.C. contactor (J4), D.C. contactor (J5), D.C. contactor (J6); The end of the normal battle of the C utmost point of switching tube (P1), switching tube (P2), switching tube (P3), switching tube (P4), switching tube (P5), switching tube (P6), switching tube (P7) and D.C. contactor (J1), D.C. contactor (J2), D.C. contactor (J3), D.C. contactor (J4), D.C. contactor (J5) passes behind the electric current loop of current transformer (3) and the positive output end of AC/DC power module (2) and connecing; The E utmost point of switching tube (P1) and resistance (R1) join; The E utmost point of switching tube (P2) and resistance (R2) join; The E utmost point of switching tube (P3) and resistance (R3) join; The E utmost point of switching tube (P4) and resistance (R4) join; The E utmost point of switching tube (P5) and resistance (R5) join; The E utmost point of switching tube (P6) and resistance (R6) join; The E utmost point of switching tube (P7) and resistance (R7) join; The other end and the resistance (R8) of D.C. contactor (J1) normal opened contact join; The other end and the resistance (R9) of D.C. contactor (J2) normal opened contact join; The other end and the resistance (R10) of D.C. contactor (J3) normal opened contact join; The other end and the resistance (R11) of D.C. contactor (J4) normal opened contact join; The other end and the resistance (R12) of D.C. contactor (J5) normal opened contact join; The other end of resistance (R1), resistance (R2), resistance (R3), resistance (R4), resistance (R5), resistance (R6), resistance (R7), resistance (R8), resistance (R9), resistance (R10), resistance (R11), resistance (R12) with the negative output terminal (11) of tester mutually and connect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201160135U CN201281748Y (en) | 2008-05-15 | 2008-05-15 | Tester for performance characteristic of direct current circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201160135U CN201281748Y (en) | 2008-05-15 | 2008-05-15 | Tester for performance characteristic of direct current circuit breaker |
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| Publication Number | Publication Date |
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| CN201281748Y true CN201281748Y (en) | 2009-07-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU2008201160135U Expired - Fee Related CN201281748Y (en) | 2008-05-15 | 2008-05-15 | Tester for performance characteristic of direct current circuit breaker |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103389416A (en) * | 2012-05-10 | 2013-11-13 | 欧米克朗电子仪器有限公司 | Measurement of a resistance of a switch contact of an electrical circuit breaker |
| CN103969576A (en) * | 2014-04-24 | 2014-08-06 | 国家电网公司 | Dynamic characteristic analyzer for dual-grounding circuit breaker |
| CN105388418A (en) * | 2015-12-22 | 2016-03-09 | 苏州工业园区海沃科技有限公司 | A circuit breaker action time test device and method based on transformer excitation characteristics |
| CN104101832B (en) * | 2014-06-18 | 2017-02-08 | 国家电网公司 | High voltage circuit breaker movement characteristic test method |
-
2008
- 2008-05-15 CN CNU2008201160135U patent/CN201281748Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103389416A (en) * | 2012-05-10 | 2013-11-13 | 欧米克朗电子仪器有限公司 | Measurement of a resistance of a switch contact of an electrical circuit breaker |
| US9322880B2 (en) | 2012-05-10 | 2016-04-26 | Omicron Electronics Gmbh | Measurement of a resistance of a switching contact of an electrical circuit breaker |
| CN103389416B (en) * | 2012-05-10 | 2016-07-06 | 欧米克朗电子仪器有限公司 | The resistance measurement of the switch contact of circuit-breaker |
| CN103969576A (en) * | 2014-04-24 | 2014-08-06 | 国家电网公司 | Dynamic characteristic analyzer for dual-grounding circuit breaker |
| CN104101832B (en) * | 2014-06-18 | 2017-02-08 | 国家电网公司 | High voltage circuit breaker movement characteristic test method |
| CN105388418A (en) * | 2015-12-22 | 2016-03-09 | 苏州工业园区海沃科技有限公司 | A circuit breaker action time test device and method based on transformer excitation characteristics |
| CN105388418B (en) * | 2015-12-22 | 2018-07-24 | 苏州工业园区海沃科技有限公司 | Breaker actuation time tester based on mutual inductor excitation feature and its method |
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