CN201698628U - Simulator of circuit breaker - Google Patents
Simulator of circuit breaker Download PDFInfo
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- CN201698628U CN201698628U CN2010202334911U CN201020233491U CN201698628U CN 201698628 U CN201698628 U CN 201698628U CN 2010202334911 U CN2010202334911 U CN 2010202334911U CN 201020233491 U CN201020233491 U CN 201020233491U CN 201698628 U CN201698628 U CN 201698628U
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- 230000003116 impacting effect Effects 0.000 claims abstract description 22
- 238000004804 winding Methods 0.000 claims description 12
- 230000009191 jumping Effects 0.000 claims description 9
- 238000012423 maintenance Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 6
- 230000008569 process Effects 0.000 abstract description 5
- 230000009471 action Effects 0.000 description 10
- 230000001681 protective effect Effects 0.000 description 10
- 230000000694 effects Effects 0.000 description 9
- 230000005611 electricity Effects 0.000 description 6
- 238000012360 testing method Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
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- 239000002699 waste material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
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Abstract
The utility model discloses a simulator of a circuit breaker, which comprises a switching impacting starting loop, a tripping impacting starting loop and a relay logic keeping loop. The simulator solves the problem that a high-voltage switch has short service life as the high-voltage switch frequently moves when performing the linkage operation of the relay protection and the high-voltage circuit breaker in the prior art. When independently performing the loop joint debugging experiment with the automatic device and the protection device in the existing laboratory, the simulator can replace the movement of the high-voltage circuit breaker, can really and effectively simulate the movement deflecting process of a mechanical auxiliary contact when the high-voltage circuit breaker moves, and meets the judging requirement of the automatic device and the protection device on the switching-off and switching-on positions of the circuit breaker.
Description
Technical field
The utility model relates to a kind of isolating switch analogue means; relate in particular to the device of the actual breaker tripping and closing of mimic-disconnecting switch that a kind of auxiliary reclay that adopts current start, voltage to keep realizes, its technical field belongs to the auxiliary device of high voltage substation automatic control device, protective relaying device performance adjustment.
Background technology
The automaton of primary cut-out, protective relaying device are the major control electrical equipment in the electric system, and also occupy critical role in the teaching of all kinds of electric power professional universities and colleges.Most of universities and colleges carry out telling about aspect the Specialized Theory; the have ready conditions laboratory of carrying out practical teaching generally also is single aut.eq., protective device teaching, can't satisfy the overall process teaching of the actual action of leading the way that aut.eq., protective device carry out with isolating switch.Because the primary cut-out equipment volume is huge, of a great variety, complex structure, cost an arm and a leg, can't in the laboratory, demonstrate operation, and primary cut-out do not allow to carry out frequent combined floodgate, trip operation, carries out the requirement of frequent operation in the time of can't satisfying teaching demonstration.
At present, in the prior art be by several unit relays or several A.C. contactors constitute the isolating switch analogue means, with the secondary control loop connection type of the primary cut-out of reality bigger difference is arranged.The isolating switch analogue means that domestic some power equipment manufacturer produced mostly adopts technology manufacturings such as single chip microcomputer, integrated circuit to form, its complex structure, cost an arm and a leg, poor anti jamming capability, when the breaker tripping and closing number of times is too frequent, very easily damage, and the cost height, repair difficulty, and brought inconvenience for the operate as normal of this area, therefore need improve the isolating switch analogue means and perfect at this problem.
The utility model content
It is simple, cheap that technical problem to be solved in the utility model provides a kind of structural principle, truly the isolating switch analogue means of simulated high-pressure isolating switch secondary control loop and contact course of action.
For solving the problems of the technologies described above, technical solution adopted in the utility model is: a kind of isolating switch analogue means, and it comprises that combined floodgate impacting start loop, tripping operation impacting start loop and relay logic keep the loop; Described combined floodgate impacting start loop is composed in series successively by normally closed contact 1ZJ1 and current coil 1ZJ/I, the starting resistance RH of the auxiliary reclay 1ZJ that connection terminal 5,8, first current start, the voltage of K switch K are kept, and described combined floodgate impacting start loop is connected between positive supply+KM and the negative supply-KM; Current coil 2ZJ/I, the starting resistance RT of the auxiliary reclay 2ZJ that normally opened contact 1ZJ2, second current start, the voltage of the auxiliary reclay 1ZJ that described tripping operation impacting start loop is kept by connection terminal 6,7, first current start, the voltage of K switch K is kept are composed in series successively, and described tripping operation impacting start loop is connected between positive supply+KM and the negative supply-KM; Described relay logic keeps the normally opened contact 1ZJ3 of the auxiliary reclay 1ZJ that the loop kept by first current start, voltage and the normally closed contact 2ZJ1 of the auxiliary reclay 2ZJ that potential winding 1ZJ/V, second current start, voltage are kept to be composed in series successively, described relay logic keep the loop be connected on+110V and-110V between.
Adopt the beneficial effect that technique scheme produced to be: can be truly the action displacement process of simulated high-pressure isolating switch action moment tool auxiliary contact efficiently; to the differentiation demand of isolating switch branch, closing position, concrete effect is as described below when satisfying aut.eq., protective device uniting and adjustment:
(1) this device is applied in on-the-spot automation equipment, protective device before putting into operation during elementary debugging; can reduce the breaker tripping and closing number of times of primary cut-out; improve the serviceable life of isolating switch; can satisfy the debugging demand of automation equipment, protective device again; and can insert above-mentioned loop on demand according to the demand of phase-splitting operation, can simulate single-hop and singly close; three jump three closes, and jumps the extra high voltage circuit breaker configuration manner of execution of the phase-splitting operation that does not conform to forever.
The course of action of alternative primary cut-out when (2) this device is applied in the isolated system test of relay protection real training chamber; take up an area of that little, function is complete, simplicity of design, fidelity height; can save substantial contribution (purchase primary cut-out) and place, greatly satisfy automation equipment, protective relaying device and simulated the united test requirement that exports lead the way (course of action that substitutes primary cut-out).
(3) electric power secondary aut.eq. manufacturer carries out can adopting when actual belt fuser is debugged the alternative isolating switch of this isolating switch analogue means to finish the preceding united test that dispatches from the factory at its device, and reliable in action is durable.
(4) relay logic of isolating switch analogue means keeps the power supply in loop to adopt fully independently direct supply; separate with the control power supply, have only the contact contact, do not have electrical communication; improve the security of test, can guarantee the integrity of control loop, protective device.
Description of drawings
Fig. 1 is the circuit theory diagrams of the utility model embodiment 1
Fig. 2 is the circuit theory diagrams of the utility model embodiment 2
Fig. 3 is the physical cabling figure with the isolating switch analogue means of ZJ3-5B relay making
Among the figure: 1ZJ is the auxiliary reclay that first current start, voltage are kept; 2ZJ is the auxiliary reclay that second current start, voltage are kept; TWJ jumps the position supervisory relay; HWJ closes a supervisory relay, and TBJ is an anti-trip relay, and RH, RT are starting resistances; LD is the separating brake pilot lamp; HD is the combined floodgate pilot lamp, and KK is a switch, and BHCK is a protective device exit relay contact.
Embodiment
Below in conjunction with accompanying drawing the utility model is described in further detail.
Referring to accompanying drawing 1, a kind of isolating switch analogue means, it comprises that combined floodgate impacting start loop, tripping operation impacting start loop and relay logic keep the loop; Described combined floodgate impacting start loop is composed in series successively by normally closed contact 1ZJ1 and current coil 1ZJ/I, the starting resistance RH of the auxiliary reclay 1ZJ that connection terminal 5,8, first current start, the voltage of K switch K are kept, and described combined floodgate impacting start loop is connected between positive supply+KM and the negative supply-KM; Current coil 2ZJ/I, the starting resistance RT of the auxiliary reclay 2ZJ that normally opened contact 1ZJ2, second current start, the voltage of the auxiliary reclay 1ZJ that described tripping operation impacting start loop is kept by connection terminal 6,7, first current start, the voltage of K switch K is kept are composed in series successively, and described tripping operation impacting start loop is connected between positive supply+KM and the negative supply-KM; Described relay logic keeps the normally opened contact 1ZJ3 of the auxiliary reclay 1ZJ that the loop kept by first current start, voltage and the normally closed contact 2ZJ1 of the auxiliary reclay 2ZJ that potential winding 1ZJ/V, second current start, voltage are kept to be composed in series successively, described relay logic keep the loop be connected on+110V and-110V between.
Referring to accompanying drawing 2, a kind of isolating switch analogue means, on the basis of embodiment 1, it also comprises the anti-jump loop of being made up of anti-trip relay TBJ; The current coil TBJ/I of anti-trip relay TBJ seals in the tripping operation impacting start loop, the connection terminal 8 of a termination K switch K after the potential winding TBJ/V of anti-trip relay TBJ connects with the normally opened contact TBJ1 of anti-trip relay TBJ, another termination negative supply-KM is connected on after the normally closed contact TBJ2 of anti-trip relay TBJ and the normally closed contact TBJ3 parallel connection between the connection terminal 8 and described normally closed contact 1ZJ1 of K switch K.
Described isolating switch analogue means, it also comprises by jumping a position supervisory relay TWJ, closing the demonstration branch road that a supervisory relay HWJ, separating brake pilot lamp LD and combined floodgate pilot lamp HD form; Jump position supervisory relay TWJ one termination positive supply+KM, the node of described normally closed contact TBJ3 of another termination and described normally closed contact 1ZJ1, close a supervisory relay HWJ one termination positive supply+KM, the connection terminal 7 of another termination K switch K, separating brake pilot lamp LD connects with a normally opened contact TWJ1 who jumps position supervisory relay TWJ and afterwards forms the separating brake indicating circuit, and described separating brake indicating circuit is connected between positive supply+KM and the negative supply-KM; Form the combined floodgate indicating circuit after combined floodgate pilot lamp HD connects with the normally opened contact HWJ1 that closes a supervisory relay HWJ, described combined floodgate indicating circuit is connected between positive supply+KM and the negative supply-KM.
Described relay logic keeps also comprising in the loop normally closed contact 2ZJ2 of the auxiliary reclay 2ZJ that second current start, voltage are kept, and described normally closed contact 2ZJ2 is connected on after the described normally closed contact 2ZJ1.
In the present embodiment, the model of the auxiliary reclay 2ZJ that the auxiliary reclay 1ZJ that first current start, voltage are kept and second current start, voltage are kept is ZJ3-5B, from combining the waste and old material of eliminating from transforming.Starting resistance RH, RT are waste and old resistance, both satisfied deciliter, the resistance of brake cable circle, satisfy the needs (the starting current 0.8A of relay) of the loop control logic that starts mimic-disconnecting switch again, close a supervisory relay and breaker tripping and closing operation circuit no-float with the jumping of control box again simultaneously.
Referring to accompanying drawing 3, the effect of each electric component is described in further details:
The effect of starting resistance RH, RT:
1. with the coil dividing potential drop of jumping position supervisory relay TWJ, closing a supervisory relay HWJ, jumping position supervisory relay TWJ, closing a resistance of the coil of supervisory relay HWJ is 10K Ω, dividing potential drop is 210V, and the resistance of starting resistance RH, RT is 150 Ω, dividing potential drop is 10V, jump a position supervisory relay TWJ, close a supervisory relay HWJ and can move with the action of often the opening of described auxiliary reclay 1ZJ, normally closed contact, reliable instruction simulation isolating switch minute, closing position.(electric current that flows through monitoring circuit is 0.002A, is far smaller than the starting current 0.6-1A of intermediate relay ZJ 3-5B, and this moment, described auxiliary reclay 1ZJ, 2ZJ can not move).
2. the startup loop of the logic of mimic-disconnecting switch maintenance is the current coil of described auxiliary reclay 1ZJ, 2ZJ, starting current 0.6-1A, starting resistance RH, RT resistance are 150 Ω, power is 100W, when the connection terminal 5,8 of K switch K or 6,7 arbitrary places connect, starting resistance RH, RT provide the specified starting current of 0.8A will for the current coil of described auxiliary reclay 1ZJ, 2ZJ, avoid the excessive relay that burns out of electric current, play metering function.
3. the mode of connection of starting resistance RH, RT can prevent when the connection terminal 5,8 of K switch K or 6,7 arbitrary places connecting, the generation of the both positive and negative polarity short circuit that the control power supply directly causes through the current coil of described auxiliary reclay 1ZJ, 2ZJ.
The effect of ZJ3-5B relay contact, coil:
1. contact 1ZJ1,1ZJ2: mimic-disconnecting switch deciliter contact, position is equivalent to the DL transfer contact of breaker mechanism branch, closing position.
2. the current coil of described auxiliary reclay 1ZJ, 2ZJ: the startup loop that the mimic-disconnecting switch logic keeps, according to minute, the arrival of combined floodgate positive electricity, mimic-disconnecting switch branch, closing position are carried out set.Described auxiliary reclay 1ZJ puts when being hit and closes the position, and described auxiliary reclay 2ZJ puts the branch position when being hit.
3. the potential winding of described auxiliary reclay 1ZJ: be the voltage holding coil after mimic-disconnecting switch closing position, the set.The charged maintenance of the potential winding of described auxiliary reclay 1ZJ makes the 1ZJ2 conducting of mimic-disconnecting switch closing position contact, and dead electricity makes the 1ZJ1 conducting of contact, separating brake position.
4. contact 1ZJ3: be the self-holding contact of 1ZJ voltage self-holding circuit, close a back conducting and keep.
5. contact 2ZJ1,2ZJ2: be separating brake set contact, tripping operation positive electricity comes the current coil of then described auxiliary reclay 2ZJ to start, and contact 2ZJ1,2ZJ2 open, and closes the back, position and keeps the loop dead electricity and return, and separating brake is finished.Wherein whether contact 2ZJ2 can be connected in series according to its reliable in action consideration, generally need not.
The explanation of isolating switch analogue means operating principle:
1, separating brake position:
The isolating switch analogue means is when the separating brake position, current coil 1ZJ/I, the starting resistance RH of control power supply+KM through jumping position supervisory relay, the normally closed contact 1ZJ1 of described auxiliary reclay 1ZJ, described auxiliary reclay 1ZJ is to control power supply-KM, jump position supervisory relay TWJ action, normally opened contact TWJ1 closure, LD is bright for the separating brake pilot lamp, and the expression isolating switch is in the separating brake position.
Under the effect of the current limliting dividing potential drop of jumping position supervisory relay potential winding, flow through the electric current of current coil 1ZJ/I of described auxiliary reclay 1ZJ less than its current start value, described auxiliary reclay 1ZJ is failure to actuate, normally closed contact 1ZJ1 closure, and normally opened contact 1ZJ2,1ZJ3 open.The relay logic of isolating switch analogue means keeps the loop can not work because of normally opened contact 1ZJ3 opens.
2, making process:
Swing handle is to closing the position, the connection terminal 5,8 of K switch K is connected, control power supply+KM arrives control power supply-KM through current coil 1ZJ/I, the starting resistance RH of the contact of anti-trip relay TBJ TBJ2 and the normally closed contact 1ZJ1 of contact TBJ3, described auxiliary reclay 1ZJ, described auxiliary reclay 1ZJ, and the current coil 1ZJ/I of described auxiliary reclay 1ZJ moves under the effect of dash current.The normally opened contact 1ZJ3 closure of described auxiliary reclay 1ZJ, the relay logic of isolating switch analogue means keeps the loop because of normally opened contact 1ZJ3 closure, the normally closed contact 2ZJ1 of described auxiliary reclay 2ZJ, 2ZJ2 closure, the potential winding 1ZJ/V of described auxiliary reclay 1ZJ is charged, and relay logic keeps loop works.The normally closed contact 1ZJ1 of described auxiliary reclay 1ZJ opens, and separating brake pilot lamp LD goes out.The normally opened contact 1ZJ2 closure of described auxiliary reclay 1ZJ, it is charged to close a supervisory relay HWJ, contact HWJ1 closure, the combined floodgate pilot lamp is bright, and the expression isolating switch is at closing position.
Under the effect of the current limliting dividing potential drop of closing a supervisory relay potential winding, the electric current of the current coil 2ZJ/I of the described auxiliary reclay 2ZJ that flows through is less than its current start value, and described auxiliary reclay 2ZJ is failure to actuate, normally closed contact 2ZJ1,2ZJ2 closure.The current coil 1ZJ/I of described auxiliary reclay 1ZJ is under the effect of inductance electromotive force, the characteristics that its contact has instantaneous make delay to disconnect, when contact 1ZJ1 disconnects, can guarantee the closure of contact 1ZJ3, charged and the self-sustaining of described auxiliary reclay 1ZJ potential winding 1ZJ/V makes the relay logic of isolating switch analogue means keep the loop reliably working.
3, separating brake process:
Swing handle is to dividing the position, the connection terminal 6,7 of K switch K is connected, control power supply+KM arrives control power supply-KM through current coil 2ZJ/I, the starting resistance RT of the normally opened contact 1ZJ2 of the current coil TBJ/I of anti-trip relay TBJ, described auxiliary reclay 1ZJ, described auxiliary reclay 2ZJ, and the current coil 2ZJ/I of described auxiliary reclay 2ZJ moves under the effect of dash current.Open because of normally closed contact 2ZJ1, the 2ZJ2 of described auxiliary reclay 2ZJ in the relay logic maintenance loop of isolating switch analogue means, described auxiliary reclay 1ZJ potential winding 1ZJ/V dead electricity, contact 1ZJ3 opens, and the relay logic of isolating switch analogue means keeps dead electricity contact, loop to return.The normally opened contact 1ZJ2 of described auxiliary reclay 1ZJ disconnects, and combined floodgate pilot lamp HD goes out.The normally closed contact 1ZJ1 closure of described auxiliary reclay 1ZJ, LD is bright for the separating brake pilot lamp, and the expression isolating switch is in the separating brake position.
Claims (5)
1. an isolating switch analogue means is characterized in that it comprises that combined floodgate impacting start loop, tripping operation impacting start loop and relay logic keep the loop; Described combined floodgate impacting start loop is composed in series successively by normally closed contact (1ZJ1) and current coil (1ZJ/I), the starting resistance (RH) of the auxiliary reclay (1ZJ) that connection terminal (5,8), first current start, the voltage of switch (KK) are kept, described combined floodgate impacting start loop be connected on positive supply (+KM) and negative supply (KM); Current coil (2ZJ/I), the starting resistance (RT) of the auxiliary reclay (2ZJ) that normally opened contact (1ZJ2), second current start, the voltage of the auxiliary reclay (1ZJ) that described tripping operation impacting start loop is kept by connection terminal (6,7), first current start, the voltage of switch (KK) is kept are composed in series successively, described tripping operation impacting start loop be connected on positive supply (+KM) and negative supply (KM); Described relay logic keeps the normally opened contact (1ZJ3) of the auxiliary reclay (1ZJ) that the loop kept by first current start, voltage and the normally closed contact (2ZJ1) of the auxiliary reclay (2ZJ) that potential winding (1ZJ/V), second current start, voltage are kept to be composed in series successively, described relay logic maintenance loop is connected on+110V and-110V between.
2. isolating switch analogue means according to claim 1 is characterized in that it also comprises the anti-jump loop of being made up of anti-trip relay (TBJ); The current coil (TBJ/I) of anti-trip relay (TBJ) seals in the tripping operation impacting start loop, the connection terminal (8) of a termination switch (KK) after the potential winding (TBJ/V) of anti-trip relay (TBJ) is connected with the normally opened contact (TBJ1) of anti-trip relay (TBJ), another termination negative supply (KM), is connected between the connection terminal (8) and described normally closed contact (1ZJ1) of switch (KK) after the normally closed contact (TBJ2) of anti-trip relay (TBJ) and normally closed contact (TBJ3) parallel connection.
3. isolating switch analogue means according to claim 2 is characterized in that it also comprises by jumping position supervisory relay (TWJ), closing the demonstration branch road that a supervisory relay (HWJ), separating brake pilot lamp (LD) and combined floodgate pilot lamp (HD) are formed; Jumping position supervisory relay (TWJ) termination positive supply (+KM), the node of described normally closed contact of another termination (TBJ3) and described normally closed contact (1ZJ1), close a supervisory relay (HWJ) termination positive supply (+KM), the connection terminal (7) of another termination switch (KK), separating brake pilot lamp (LD) the back composition separating brake indicating circuit of connect with a normally opened contact (TWJ1) of jumping position supervisory relay (TWJ), described separating brake indicating circuit be connected on positive supply (+KM) and negative supply (KM); The combined floodgate indicating circuit is formed in combined floodgate pilot lamp (HD) back of connecting with the normally opened contact that closes a supervisory relay (HWJ) (HWJ1), described combined floodgate indicating circuit be connected on positive supply (+KM) and negative supply (KM).
4. isolating switch analogue means according to claim 1, it is characterized in that described relay logic keeps also comprising in the loop normally closed contact (2ZJ2) of the auxiliary reclay (2ZJ) that second current start, voltage are kept, described normally closed contact (2ZJ2) is connected on described normally closed contact (2ZJ1) afterwards.
5. isolating switch analogue means according to claim 1 is characterized in that the model of the auxiliary reclay (2ZJ) that auxiliary reclay (1ZJ) that described first current start, voltage are kept and second current start, voltage are kept is ZJ3-5B.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202334911U CN201698628U (en) | 2010-06-23 | 2010-06-23 | Simulator of circuit breaker |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202334911U CN201698628U (en) | 2010-06-23 | 2010-06-23 | Simulator of circuit breaker |
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| CN201698628U true CN201698628U (en) | 2011-01-05 |
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| CN2010202334911U Expired - Fee Related CN201698628U (en) | 2010-06-23 | 2010-06-23 | Simulator of circuit breaker |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102694544A (en) * | 2012-06-13 | 2012-09-26 | 上海第二工业大学 | Demonstration device for proving logical algebra inversion law |
| CN103293350A (en) * | 2013-06-06 | 2013-09-11 | 国家电网公司 | Micro analog circuit breaker |
| CN103454462A (en) * | 2013-09-02 | 2013-12-18 | 国家电网公司 | Multifunctional active mimic circuit breaker |
| CN104251969A (en) * | 2013-06-26 | 2014-12-31 | 上海聚仁电力科技有限公司 | Simulation breaker and test method |
| CN104701083A (en) * | 2013-12-10 | 2015-06-10 | 珠海格力电器股份有限公司 | Relay contact control method, relay contact control device and relay contact control equipment |
| CN109119964A (en) * | 2018-10-29 | 2019-01-01 | 国网辽宁省电力有限公司沈阳供电公司 | Prevent the intelligent controller of switch trip coil burnout |
| CN111965461A (en) * | 2020-08-24 | 2020-11-20 | 华能山东发电有限公司烟台发电厂 | Multifunctional analog circuit breaker |
-
2010
- 2010-06-23 CN CN2010202334911U patent/CN201698628U/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102694544A (en) * | 2012-06-13 | 2012-09-26 | 上海第二工业大学 | Demonstration device for proving logical algebra inversion law |
| CN103293350A (en) * | 2013-06-06 | 2013-09-11 | 国家电网公司 | Micro analog circuit breaker |
| CN103293350B (en) * | 2013-06-06 | 2015-12-09 | 国家电网公司 | Minisize simulative circuit breaker |
| CN104251969A (en) * | 2013-06-26 | 2014-12-31 | 上海聚仁电力科技有限公司 | Simulation breaker and test method |
| CN103454462A (en) * | 2013-09-02 | 2013-12-18 | 国家电网公司 | Multifunctional active mimic circuit breaker |
| CN103454462B (en) * | 2013-09-02 | 2015-12-02 | 国家电网公司 | Multifunctional active mimic circuit breaker |
| CN104701083A (en) * | 2013-12-10 | 2015-06-10 | 珠海格力电器股份有限公司 | Relay contact control method, relay contact control device and relay contact control equipment |
| CN104701083B (en) * | 2013-12-10 | 2018-01-05 | 珠海格力电器股份有限公司 | relay contact control method, device and equipment |
| CN109119964A (en) * | 2018-10-29 | 2019-01-01 | 国网辽宁省电力有限公司沈阳供电公司 | Prevent the intelligent controller of switch trip coil burnout |
| CN109119964B (en) * | 2018-10-29 | 2023-12-05 | 国网辽宁省电力有限公司沈阳供电公司 | Intelligent controller for preventing switch tripping coil from burning |
| CN111965461A (en) * | 2020-08-24 | 2020-11-20 | 华能山东发电有限公司烟台发电厂 | Multifunctional analog circuit breaker |
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