CN204101652U - Portable power brake test device - Google Patents
Portable power brake test device Download PDFInfo
- Publication number
- CN204101652U CN204101652U CN201420445686.0U CN201420445686U CN204101652U CN 204101652 U CN204101652 U CN 204101652U CN 201420445686 U CN201420445686 U CN 201420445686U CN 204101652 U CN204101652 U CN 204101652U
- Authority
- CN
- China
- Prior art keywords
- relay
- circuit
- remote
- power
- switching signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000011664 signaling Effects 0.000 claims abstract description 15
- 230000005611 electricity Effects 0.000 claims description 13
- 238000000034 method Methods 0.000 abstract description 7
- 238000004891 communication Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000004088 simulation Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000010899 nucleation Methods 0.000 description 1
Landscapes
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The utility model discloses a kind of portable power brake test device, comprise, remote control input circuit, relay logic circuit, electric power gate position display circuit, remote signalling output loop and power circuit, remote control input circuit is electrically connected with relay logic circuit, the output of relay logic circuit is electrically connected with electric power gate position display circuit and remote signalling output loop respectively, and power circuit provides electric power for above-mentioned each element circuit; Beneficial effect is, adopt relay logic circuit, realize the specific aim test of measure and control device remote control remote communication function, decrease the life consumption that working control isolating switch produces, also solve in power distribution automation debug process the problem that cannot realize simulating electric brake on off state; Test unit also adds safety handle, not only can realize handhold functional, also effectively isolates human body and equipment live part, improves safety in utilization, meet the active demand of the art, improve work efficiency.
Description
Technical field
The utility model relates to power equipment dispatching automation professional skill field; Particularly relate to a kind of portable power brake test device.
Background technology
Along with power dispatching automation technology constantly perfect, Automatization Technology in Transformer Substation reach its maturity, power distribution automation transformation deep propelling, intelligent grid development trend is unquestionable." courier " that measure and control device transmits as information plays key player, this just proposes new demand to measure and control device reliability, especially for remote control, this kind of important control signal of remote signalling of isolating switch or on-load switch, must ensure that it is passed on by measure and control device accurately downwards, but so far, also not for proving installation, the equipment of measure and control device analog switch state.
Meanwhile, no matter be to transformer station, also or, the acceptance test of distribution terminal, robotization class daily servicing test, rigid requirement is had to isolating switch or on-load switch Remote control function, and in debug process, sometimes, we are only concerned about actual switch, and whether remote control is successful, point, conjunction information whether correct on give, and have ignored some practical problemss.Such as, in transformer station's acceptance test process, can only by actual isolating switch point, the execution of incompatible judgement guidance command whether, and reality is divided frequently isolating switch, is closed control, can have a strong impact on the serviceable life of isolating switch.Again such as, in power distribution automation transformation process, because on-load switch reality does not allow to disconnect, the method simulating signal of multimeter or short circuit point can only be passed through, very inconvenient and easily maloperation, based on above-mentioned, a kind of portable power brake test of the art active demand device.
Summary of the invention
Technical problem to be solved in the utility model is, provides a kind of portable power brake test device.
The technical scheme that the utility model adopts is, a kind of portable power brake test device, comprise, remote-controlled input circuit, relay logic circuit, electric power gate position display circuit, remote signalling output circuit and power circuit, described remote-controlled input circuit is electrically connected with relay logic circuit, and the output of relay logic circuit is electrically connected with electric power gate position display circuit and remote signalling output circuit respectively, and power circuit provides electric power for above-mentioned each element circuit.
Described remote-controlled input circuit, comprise, switching signal input end, breaker tripping and closing common port and trip signal input end, the first remote signals connection terminal, the second remote signals connection terminal, fuse FU1, fuse FU2, input voltage selector switch K1, combined floodgate input signal relay K A1 and tripping operation input signal relay K A2; Switching signal input end is electrically connected with one end of input voltage selector switch K1 through fuse FU1, and the other end of input voltage selector switch K1 is electrically connected with breaker tripping and closing common port by combined floodgate input signal relay K A1; Trip signal input end is electrically connected with breaker tripping and closing common port after fuse FU2 connects with tripping operation input signal relay K A2.
Described relay logic circuit and remote signalling output circuit, comprise, normally opened contact KA1-2, the trip signal pilot relay KA4 of the normally closed contact KA3-1 of switching signal pilot relay KA3, switching signal pilot relay KA3, the normally opened contact KA3-2 of switching signal pilot relay KA3, combined floodgate input signal relay K A1, normally opened contact KA2-2, the normally closed contact KA4-1 of trip signal pilot relay KA4 of tripping operation input signal relay K A2 and the normally opened contact KA4-2 of trip signal pilot relay KA4; Electric power gate position display circuit, comprises, and close a floodgate test button SB11, combined floodgate reset button SB12, trip test button SB21, tripping operation reset button SB22, co-bit indicator HR and point position indicator LR; After the positive pole ECDC brake test button SB11 of power circuit, the normally opened contact KA1-2 of combined floodgate input signal relay K A1, the normally opened contact KA3-2 of switching signal pilot relay KA3 are connected in parallel, leading up to series connection switching signal pilot relay KA3, combined floodgate reset button SB12 is connected with the negative electricity of power circuit with after the normally closed contact KA4-1 of trip signal pilot relay KA4; Co-bit indicator HR of separately leading up to is connected with the negative electricity of power circuit; The positive pole of power circuit is also after trip test button SB21, the normally opened contact KA2-2 of tripping operation input signal relay K A2 and the normally opened contact KA4-2 of trip signal pilot relay KA4 are connected in parallel, lead up to series tripping signal control relay KA4, tripping operation reset button SB22 be connected in parallel after the normally closed contact KA3-1 of switching signal pilot relay KA3 after be connected with the negative electricity of power circuit, a point position indicator LR of separately leading up to is connected with the negative electricity of power circuit; First remote signals connection terminal is electrically connected with the second remote signals connection terminal by switching signal relay normally open contact KA3-3.
Described power circuit is two joints No. 5 batteries; Also safety handle is provided with in the bottom of this test unit.
The beneficial effects of the utility model are, adopt relay logic circuit, realize the specific aim test of measure and control device remote control remote communication function, both guidance command can be received, the on off state of simulation divide-shut brake, the on off state that can close a floodgate according to simulation again, upload displacement information, decrease the life consumption that working control isolating switch produces, also solve in power distribution automation debug process the problem that cannot realize simulating electric brake on off state, achieve many things at one stroke; This test unit also adds safety handle, not only can realize handhold functional, also effectively isolates human body and equipment live part, improves safety in utilization, meet the active demand of the art, improve work efficiency.
Accompanying drawing explanation
Fig. 1 is the utility model portable power brake test device composition block diagram;
Fig. 2 is input and output circuit theory figure of the present utility model;
Fig. 3 is control loop schematic diagram of the present utility model.
In figure:
10, remote control input circuit 12, switching signal input end
15, breaker tripping and closing common port 17, trip signal input end
18, the first remote signals connection terminal 19, second remote signals connection terminal
20, relay logic circuit 30, electric power gate position display circuit
40, remote signalling output loop 50, power circuit.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail:
As shown in Figure 1 to Figure 3, the utility model portable power brake test device, comprise, remote-controlled input circuit 10, relay logic circuit 20, electric power gate position display circuit 30, remote signalling output circuit 40 and power circuit 50, described remote-controlled input circuit 10 is electrically connected with relay logic circuit 20, the output of relay logic circuit 20 is electrically connected with electric power gate position display circuit 30 and remote signalling output circuit 40 respectively, and power circuit 50 provides electric power for above-mentioned each element circuit.
Described remote-controlled input circuit 10, comprise, switching signal input end 12, breaker tripping and closing common port 15 and trip signal input end 17, first remote signals connection terminal 18, the second remote signals connection terminal 19, fuse FU1, fuse FU2, input voltage selector switch K1, combined floodgate input signal relay K A1 and tripping operation input signal relay K A2; Switching signal input end 12 is electrically connected with one end of input voltage selector switch K1 through fuse FU1, and the other end of input voltage selector switch K1 is electrically connected with breaker tripping and closing common port 15 by combined floodgate input signal relay K A1; Trip signal input end 17 is electrically connected with breaker tripping and closing common port 15 after fuse FU2 connects with tripping operation input signal relay K A2.
Described relay logic circuit 20 and remote signalling output circuit 40, comprise, normally opened contact KA1-2, the trip signal pilot relay KA4 of the normally closed contact KA3-1 of switching signal pilot relay KA3, switching signal pilot relay KA3, the normally opened contact KA3-2 of switching signal pilot relay KA3, combined floodgate input signal relay K A1, normally opened contact KA2-2, the normally closed contact KA4-1 of trip signal pilot relay KA4 of tripping operation input signal relay K A2 and the normally opened contact KA4-2 of trip signal pilot relay KA4; Electric power gate position display circuit 30, comprises, and close a floodgate test button SB11, combined floodgate reset button SB12, trip test button SB21, tripping operation reset button SB22, co-bit indicator HR and point position indicator LR; After the positive pole ECDC brake test button SB11 of power circuit 50, the normally opened contact KA1-2 of combined floodgate input signal relay K A1, the normally opened contact KA3-2 of switching signal pilot relay KA3 are connected in parallel, leading up to series connection switching signal pilot relay KA3, combined floodgate reset button SB12 is connected with the negative electricity of power circuit 50 with after the normally closed contact KA4-1 of trip signal pilot relay KA4; Co-bit indicator HR of separately leading up to is connected with the negative electricity of power circuit 50; The positive pole of power circuit 50 is also after trip test button SB21, the normally opened contact KA2-2 of tripping operation input signal relay K A2 and the normally opened contact KA4-2 of trip signal pilot relay KA4 are connected in parallel, lead up to series tripping signal control relay KA4, tripping operation reset button SB22 be connected in parallel after the normally closed contact KA3-1 of switching signal pilot relay KA3 after be connected with the negative electricity of power circuit 50, a point position indicator LR of separately leading up to is connected with the negative electricity of power circuit 50; First remote signals connection terminal 18 is electrically connected with the second remote signals connection terminal 19 by switching signal relay normally open contact KA3-3.
Described power circuit 50 is two joints No. 5 batteries; Also safety handle is provided with in the bottom of this test unit.
Principle of work of the present utility model:
Before using, first terminal corresponding to power circuit respectively with the second remote signals connection terminal 19 to switching signal input end 12, breaker tripping and closing common port 15, trip signal input end 17, position of the switch output terminal, the first remote signals connection terminal 18 is connected.
When this device receives closing pulse signal, switching signal relay K A1 coil in relay logic circuit 20 obtains electric, the normally opened contact KA1-2 of combined floodgate input signal relay K A1 closes conducting, shutting-brake control loop is by the normally closed contact KA4-1-power cathode loop of the normally opened contact KA1-2-switching signal relay K A3 coil-combined floodgate reset button SB12-trip signal pilot relay KA4 of positive source-combined floodgate input signal relay K A1, and by the normally opened contact KA1-2-co-bit indicator HR-power cathode loop conducting of positive source-combined floodgate input signal relay K A1, switching signal relay K A3 coil is made to obtain electric, co-bit indicator HR lights, the normally opened contact KA3-2 of switching signal relay K A3 closes, and forms the normally closed contact KA4-1-power cathode self-holding circuit of the normally opened contact KA3-2-switching signal relay K A3 coil-combined floodgate reset button SB12-trip signal pilot relay KA4 from positive source-switching signal relay K A3, meanwhile, the normally opened contact KA3-3 of switching signal relay K A3 closes, between the first remote signals connection terminal 18 and the second remote signals connection terminal 19, export combined floodgate remote signals.Such effect is when shutting-brake control loop still conducting after closing pulse blackout, co-bit indicator HR Chang Liang, and in remote signalling output loop, switching signal keeps exporting co-bit state (the normally opened contact KA3-3 of switching signal relay K A3 closes).Accomplish the location status of bright, the analog switch lock that goes out by co-bit indicator HR, and closed by the normally opened contact KA3-3 of closing relay KA3, maintained and export analog remote signaling signal.
When this device receives tripping operation pulse signal, in like manner known with closing circuit, trip signal relay K A2 coil obtains electric, the normally opened contact KA2-2 of trip signal relay K A2 of control loop of tripping in relay logic circuit 20 closes conducting, control loop is by positive source-KA2-KA4 coil-SB22-switching signal relay K A3 normally closed contact KA3-1-power cathode loop, and by positive source-trip signal relay K A2 coil-point position indicator LR-power cathode loop conducting, trip signal relay K A4 coil is made to obtain electric, co-bit indicator LR lights, the normally opened contact KA4-2 of trip signal relay K A4 closes, and forms the normally opened contact KA4-2-trip signal relay coil KA4 coil-tripping operation reset button SB22-switching signal relay K A3 normally closed contact KA3-1-power cathode self-holding circuit from positive source-trip signal relay K A4.Meanwhile, the normally closed contact KA4-1 of trip signal relay K A4 disconnects, closing relay KA3 coil losing electricity, and is disconnected by the normally opened contact KA3-3 of closing relay KA3, and shutting-brake control loop disconnects, and uploads switch and divides a remote signals.
In shutting-brake control loop, also add the normally closed contact KA4-1 of trip signal relay K A4, the normally closed contact KA3-1 of switching signal relay K A3 is added in tripping operation control loop, increase this two normally closed contacts, be used for forming shutting-brake control and the interlock function controlled that trips, the fault seeding signal that can effectively prevent maloperation from being formed, guarantees that namely analog switch signal presumptuously closes.
Conjunction, trip test function: this device, when not receiving the conjunction in power circuit, tripping operation telecommand, can pass through the state of combined floodgate test button SB11 or trip test button SB21 button analog switch lock, and upload remote signals.Such as: when pressing combined floodgate test button SB11, from the normally closed contact KA4-1-power cathode loop conducting of positive source-combined floodgate test button SB11-switching signal relay K A3 coil-combined floodgate reset button SB12-trip signal relay K A4, co-bit indicator HR is lit, the normally opened contact KA3-3 of the switching signal relay K A3 in output loop closes, and simulation co-bit remote signals is uploaded; When pressing trip test button SB21, from the normally opened contact KA3-3-power cathode loop conducting of positive source-trip test button SB21-trip signal relay K A4 coil-tripping operation reset button SB22-switching signal relay K A3, point position indicator LR is lit, the normally opened contact KA3-3 of the switching signal relay K A3 in output loop disconnects, and modulating output divides a remote signals.
Combined floodgate reset button SB12 and tripping operation reset button SB22: the power supply that can disconnect control loop, makes test instrument restPose.Such as: when pressing combined floodgate reset button SB12, the power-off of shutting-brake control loop, co-bit indicator HR extinguishes, and in output loop, the normally opened contact KA3-3 of switching signal relay K A3 disconnects, and stops uploading co-bit remote signals.When pressing tripping operation reset button SB22, the power-off of tripping operation control loop, a point position indicator LR extinguishes, and test instrument restPoses.
Employing relay logic circuit of the present utility model, realize the specific aim test of measure and control device remote control remote communication function, both guidance command can be received, the on off state of simulation divide-shut brake, according to the state of analog switch divide-shut brake, displacement information can be uploaded again, decrease the life consumption that working control isolating switch produces, also solve in power distribution automation debug process the problem that cannot realize simulating electric brake on off state, achieve many things at one stroke; This test unit also adds safety handle, not only can realize handhold functional, also effectively isolates human body and equipment live part, improves safety in utilization, meet the active demand of the art, improve work efficiency.
Claims (4)
1. a portable power brake test device, it is characterized in that, comprise, remote-controlled input circuit (10), relay logic circuit (20), electric power gate position display circuit (30), remote signalling output circuit (40) and power circuit (50), described remote-controlled input circuit (10) is electrically connected with relay logic circuit (20), the output of relay logic circuit (20) is electrically connected with electric power gate position display circuit (30) and remote signalling output circuit (40) respectively, and power circuit (50) provides electric power for above-mentioned each element circuit.
2. portable power brake test device according to claim 1, it is characterized in that, described remote-controlled input circuit (10), comprise, switching signal input end (12), breaker tripping and closing common port (15) and trip signal input end (17), the first remote signals connection terminal (18), the second remote signals connection terminal (19), fuse FU1, fuse FU2, input voltage selector switch K1, combined floodgate input signal relay K A1 and tripping operation input signal relay K A2; Switching signal input end (12) is electrically connected with one end of input voltage selector switch K1 through fuse FU1, and the other end of input voltage selector switch K1 is electrically connected with breaker tripping and closing common port (15) by combined floodgate input signal relay K A1; Trip signal input end (17) is electrically connected with breaker tripping and closing common port (15) after fuse FU2 connects with tripping operation input signal relay K A2.
3. portable power brake test device according to claim 1, it is characterized in that, described relay logic circuit (20) and remote signalling output circuit (40), comprise, switching signal pilot relay KA3, the normally closed contact KA3-1 of switching signal pilot relay KA3, the normally opened contact KA3-2 of switching signal pilot relay KA3, the normally opened contact KA1-2 of combined floodgate input signal relay K A1, trip signal pilot relay KA4, the normally opened contact KA2-2 of tripping operation input signal relay K A2, the normally closed contact KA4-1 of trip signal pilot relay KA4 and the normally opened contact KA4-2 of trip signal pilot relay KA4, electric power gate position display circuit (30), comprises, and close a floodgate test button SB11, combined floodgate reset button SB12, trip test button SB21, tripping operation reset button SB22, co-bit indicator HR and point position indicator LR, after the positive pole ECDC brake test button SB11 of power circuit (50), the normally opened contact KA1-2 of combined floodgate input signal relay K A1, the normally opened contact KA3-2 of switching signal pilot relay KA3 are connected in parallel, leading up to series connection switching signal pilot relay KA3, combined floodgate reset button SB12 is connected with the negative electricity of power circuit (50) with after the normally closed contact KA4-1 of trip signal pilot relay KA4, co-bit indicator HR of separately leading up to is connected with the negative electricity of power circuit (50), the positive pole of power circuit (50) is also after trip test button SB21, the normally opened contact KA2-2 of tripping operation input signal relay K A2 and the normally opened contact KA4-2 of trip signal pilot relay KA4 are connected in parallel, lead up to series tripping signal control relay KA4, tripping operation reset button SB22 be connected in parallel after the normally closed contact KA3-1 of switching signal pilot relay KA3 after be connected with the negative electricity of power circuit (50), a point position indicator LR of separately leading up to is connected with the negative electricity of power circuit (50), first remote signals connection terminal (18) is electrically connected with the second remote signals connection terminal (19) by switching signal relay normally open contact (KA3-3).
4. the portable power brake test device according to claim 1 or 2 or 3, is characterized in that, described power circuit (50) is two joints No. 5 batteries; Also safety handle is provided with in the bottom of this test unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420445686.0U CN204101652U (en) | 2014-08-08 | 2014-08-08 | Portable power brake test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420445686.0U CN204101652U (en) | 2014-08-08 | 2014-08-08 | Portable power brake test device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204101652U true CN204101652U (en) | 2015-01-14 |
Family
ID=52270069
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420445686.0U Active CN204101652U (en) | 2014-08-08 | 2014-08-08 | Portable power brake test device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204101652U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107064790A (en) * | 2017-03-30 | 2017-08-18 | 国网山东省电力公司莱芜供电公司 | Voltage-time type logic tester and method of testing |
| CN110293823A (en) * | 2019-06-20 | 2019-10-01 | 福耀玻璃工业集团股份有限公司 | A kind of portable scuttle control device |
| CN113422355A (en) * | 2021-06-28 | 2021-09-21 | 积成电子股份有限公司 | Remote signaling remote control shared circuit for medium-voltage distribution recloser controller |
| CN114184951A (en) * | 2021-12-14 | 2022-03-15 | 烟台东方威思顿电力设备有限公司 | Circuit breaker spring operating mechanism simulation system |
| CN115236428A (en) * | 2022-06-17 | 2022-10-25 | 山东电工电气集团新能科技有限公司 | Detection device and detection method for DTU power distribution terminal |
| CN115236428B (en) * | 2022-06-17 | 2024-05-14 | 山东电工电气集团新能科技有限公司 | Detection device and detection method for DTU power distribution terminal |
-
2014
- 2014-08-08 CN CN201420445686.0U patent/CN204101652U/en active Active
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107064790A (en) * | 2017-03-30 | 2017-08-18 | 国网山东省电力公司莱芜供电公司 | Voltage-time type logic tester and method of testing |
| CN107064790B (en) * | 2017-03-30 | 2023-09-19 | 国网山东省电力公司莱芜供电公司 | Voltage time type logic tester and testing method |
| CN110293823A (en) * | 2019-06-20 | 2019-10-01 | 福耀玻璃工业集团股份有限公司 | A kind of portable scuttle control device |
| CN110293823B (en) * | 2019-06-20 | 2021-03-16 | 福耀玻璃工业集团股份有限公司 | Portable skylight controlling means |
| CN113422355A (en) * | 2021-06-28 | 2021-09-21 | 积成电子股份有限公司 | Remote signaling remote control shared circuit for medium-voltage distribution recloser controller |
| CN113422355B (en) * | 2021-06-28 | 2022-11-29 | 积成电子股份有限公司 | Remote signaling remote control shared circuit for medium-voltage distribution recloser controller |
| CN114184951A (en) * | 2021-12-14 | 2022-03-15 | 烟台东方威思顿电力设备有限公司 | Circuit breaker spring operating mechanism simulation system |
| CN114184951B (en) * | 2021-12-14 | 2023-05-26 | 烟台东方威思顿电力设备有限公司 | Breaker spring operating mechanism simulation system |
| CN115236428A (en) * | 2022-06-17 | 2022-10-25 | 山东电工电气集团新能科技有限公司 | Detection device and detection method for DTU power distribution terminal |
| CN115236428B (en) * | 2022-06-17 | 2024-05-14 | 山东电工电气集团新能科技有限公司 | Detection device and detection method for DTU power distribution terminal |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204101652U (en) | Portable power brake test device | |
| CN104155550A (en) | Portable power switch state simulation testing device | |
| CN107300644A (en) | A kind of distribution feeder terminal FTU test devices | |
| CN202737259U (en) | Intelligent timing socket | |
| CN102208306A (en) | Low-voltage intelligent circuit breaker | |
| CN203365563U (en) | Intelligent simulated circuit breaker | |
| CN211826183U (en) | Novel simple simulation circuit breaker | |
| CN204029047U (en) | A kind of pre-payment control box | |
| CN203760864U (en) | Automatic distribution-network pole-mounted switch cabinet capable of remote monitoring | |
| CN203910663U (en) | Vacuum circuit breaker | |
| CN103136999B (en) | Simulation demonstrator used for training remote electric load control function | |
| CN202976623U (en) | Simulation demonstration device used for training remote electrical load control | |
| CN202259066U (en) | Multipolar/monopolar low-voltage intelligent circuit breaker | |
| CN203800704U (en) | Remote monitoring device for state of air switch | |
| CN208623389U (en) | A kind of one or two fusion feed line automatization terminals | |
| CN203397134U (en) | Intelligent 10 kV outdoor SF 6 breaker automatic control system | |
| CN206321718U (en) | A kind of simple mimic-disconnecting switch | |
| CN206004404U (en) | A kind of power supply switch circuit and automatic divide-shut brake intelligent breaker | |
| CN203929907U (en) | Breaker fail protection assistant experiment device | |
| CN208384000U (en) | A kind of power distribution automation aviation plug formula primary equipment simulation terminal system | |
| CN208255677U (en) | Switch state Intelligent display control device | |
| CN204065252U (en) | A kind of simulator of circuit breaker of practicality | |
| CN207339421U (en) | A kind of special transformer acquisition terminal wireless control system | |
| CN202094050U (en) | Trip device for managing load | |
| CN205333715U (en) | Multi -functional table of direct current based on TM7707 difference chip |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |