CN217332690U - Power distribution equipment power-on test device and power-on test equipment - Google Patents
Power distribution equipment power-on test device and power-on test equipment Download PDFInfo
- Publication number
- CN217332690U CN217332690U CN202220696443.9U CN202220696443U CN217332690U CN 217332690 U CN217332690 U CN 217332690U CN 202220696443 U CN202220696443 U CN 202220696443U CN 217332690 U CN217332690 U CN 217332690U
- Authority
- CN
- China
- Prior art keywords
- phase
- wire
- distribution equipment
- normally open
- open contact
- 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
- 238000012360 testing method Methods 0.000 title claims abstract description 94
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 238000004146 energy storage Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 3
- 230000007935 neutral effect Effects 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011990 functional testing Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Images
Landscapes
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The application discloses distribution equipment power-on test device and power-on test equipment has realized providing multiple friendship, DC power supply with a distribution equipment power-on test device simultaneously. The device includes: a three-phase four-wire system main line and a control line; the three-phase four-wire system main circuit is provided with: the system comprises a three-phase four-wire air switch QF1 connected at the wire inlet side, a three-phase four-wire air switch QF2 connected at the wire outlet side, a three-phase three-wire normally open contact KM _1 connected between QF1 and QF2 in series, and a direct-current voltage regulator of which the input end is connected to any two wires between QF1 and KM _ 1; the control line is connected between any two lines between QF1 and KM _ 1; the control circuit is provided with: the system comprises a self-resetting closing switch SB2, a self-resetting opening switch SB1, a coil KM _3 and a single-phase normally open contact KM _2, wherein the self-resetting closing switch SB2, the self-resetting opening switch SB1 and the coil KM _3 are connected in series, and the single-phase normally open contact KM _2 is connected with an SB2 in parallel; KM _3, KM _1 and KM _2 are subordinate to the same contactor.
Description
Technical Field
The utility model relates to an electrical technology field, more specifically say, relate to a distribution equipment circular telegram test device and circular telegram test equipment.
Background
The power distribution equipment energization test device is mainly used for power distribution equipment manufacturers to carry out various energization tests on produced power distribution equipment before leaving factories. The power distribution equipment comprises, but is not limited to, a high-low voltage switch cabinet, a distribution box, a box transformer, an opening and closing station, a ring main unit and the like.
The existing power distribution equipment energization test device can only provide a single power supply, and various power supplies are needed to be used when various power supply tests before some power distribution equipment leaves a factory, so that a plurality of power distribution equipment energization test devices are needed to be jointly used to complete the energization test of the power distribution equipment, and the power distribution equipment energization test device is time-consuming, labor-consuming and high in cost.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a distribution equipment circular telegram test device and circular telegram test equipment to the realization provides multiple friendship, DC power supply with a distribution equipment circular telegram test device simultaneously, thereby has solved and has needed the circumstances that a plurality of distribution equipment circular telegram test devices used jointly just can accomplish the circular telegram test to distribution equipment, and labour saving and time saving saves the cost.
An electrical distribution equipment energization testing device comprising: a three-phase four-wire system main line and a control line;
the three-phase four-wire system main circuit is provided with: the system comprises a three-phase four-wire air switch QF1 connected at the wire inlet side, a three-phase four-wire air switch QF2 connected at the wire outlet side, a three-phase three-wire normally open contact KM _1 connected between the three-phase four-wire air switch QF1 and the three-phase four-wire air switch QF2 in series, and a direct-current voltage regulator with the input end connected to any two wires between the three-phase four-wire air switch QF1 and the three-phase three-wire normally open contact KM _ 1;
the control circuit is connected between any two wires between the three-phase four-wire air switch QF1 and the three-phase three-wire normally open contact KM _ 1;
the control circuit is provided with: the system comprises a self-resetting closing switch SB2, a self-resetting separating switch SB1, a coil KM _3 and a single-phase normally open contact KM _2, wherein the self-resetting closing switch SB2, the self-resetting separating switch SB1 and the coil KM _3 are connected in series, and the single-phase normally open contact KM _2 is connected with the self-resetting closing switch SB2 in parallel;
the coil KM _3, the three-phase three-wire normally open contact KM _1 and the single-phase normally open contact KM _2 are coils and contact switches of the same contactor.
Optionally, the dc voltage regulator is a manual dc voltage regulator, and the voltage level output by the manual dc voltage regulator can be adjusted by rotating a voltage regulating knob of the manual dc voltage regulator.
Optionally, in any of the above-disclosed power distribution equipment energization testing apparatuses, a fuse is further connected in series to the control line.
Optionally, in any one of the above-disclosed power distribution equipment energization testing apparatuses, the power distribution equipment energization testing apparatus further includes: the input end of the direct current voltage regulator is connected to the storage battery.
Optionally, in any of the above-disclosed energization testing apparatuses for power distribution equipment, the dc output end and/or the ac output end of the three-phase four-wire main line are provided with an instrument for testing voltage levels.
Optionally, in any one of the above-disclosed power distribution equipment energization testing apparatuses, the power distribution equipment energization testing apparatus further includes: and the starting/stopping indicator light is used for indicating whether the power distribution equipment energization testing device is in a starting state or a stopping state.
Optionally, in any one of the above-disclosed power distribution equipment energization testing apparatuses, the power distribution equipment energization testing apparatus further includes: and the alarm lamp sends out an alarm signal when the power distribution equipment electrification testing device works.
Optionally, in any of the above-disclosed power distribution equipment energization testing apparatuses, a plurality of steering wheels are mounted at the bottom of a box body of the power distribution equipment energization testing apparatus.
Optionally, the steering wheel is a steering wheel capable of rotating 360 degrees.
An electrical distribution equipment energization testing apparatus comprising: a plurality of sets of the power distribution equipment electrification testing devices disclosed in any one of the above.
According to the above technical scheme, the utility model discloses when will carrying out distribution equipment circular telegram test, closed three-phase four-wire air switch QF1 and three-phase four-wire air switch QF2 earlier press from the combined floodgate switch SB2 that restores to the throne again, three-phase four-wire system main line can realize three-phase AC380V output, single-phase AC220V output and DC power supply output this moment. It is visible, the utility model discloses provide multiple friendship, DC power supply simultaneously with a distribution equipment circular telegram test device to solved and needed the condition of a plurality of distribution equipment circular telegram test device used jointly among the prior art, labour saving and time saving province cost.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is an electrical schematic diagram of a power distribution equipment energization testing apparatus disclosed in an embodiment of the present invention;
fig. 2 is an electrical schematic diagram of another power distribution equipment energization testing apparatus disclosed in the embodiment of the present invention;
fig. 3 is an electrical schematic diagram of another power distribution equipment energization testing apparatus disclosed in the embodiment of the present invention;
fig. 4 is a front view of an appearance structure of another power distribution equipment energization testing apparatus disclosed in the embodiment of the present invention;
fig. 5 is a side view of an appearance structure of a power distribution equipment energization testing apparatus disclosed in an embodiment of the present invention;
fig. 6 is a front view of an appearance structure of another power distribution equipment energization testing apparatus disclosed in the embodiment of the present invention;
fig. 7 is a front view of an appearance structure of another power distribution equipment energization testing apparatus according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1, the embodiment of the utility model discloses distribution equipment circular telegram test device is disclosed, include: a three-phase four-wire main line (a three-phase four-wire system refers to that the phase of a power supply transmitted in a power distribution network is three-phase, four wires are used for transmission, three wires represent A, B, C three phases respectively, and the fourth wire is a neutral wire N (namely a zero wire) and a control line;
the three-phase four-wire system main circuit is provided with: the system comprises a three-phase four-wire air switch QF1 connected at the inlet side, a three-phase four-wire air switch QF2 connected at the outlet side, a three-phase three-wire normally-open contact KM _1 connected in series between the three-phase four-wire air switch QF1 and the three-phase four-wire air switch QF2, and a direct-current voltage regulator with the input end connected to any two wires between the three-phase four-wire air switch QF1 and the three-phase three-wire normally-open contact KM _1 (fig. 1 only takes the example that the input end of the direct-current voltage regulator is connected to a C-phase leading-out wire and a neutral wire N between the three-phase four-wire air switch QF1 and the three-phase three-wire normally-open contact KM _ 1);
the control circuit is connected between any two lines between the three-phase four-wire air switch QF1 and the three-phase three-wire normally open contact KM _1 (fig. 1 only takes the control circuit connected between the neutral line N and the C-phase lead line between the three-phase three-wire air switch QF1 and the three-phase three-wire normally open contact KM _1 as an example);
the control circuit is provided with: the system comprises a self-resetting closing switch SB2, a self-resetting separating switch SB1, a coil KM _3 and a single-phase normally open contact KM _2, wherein the self-resetting closing switch SB2, the self-resetting separating switch SB1 and the coil KM _3 are connected in series, and the single-phase normally open contact KM _2 is connected with the self-resetting closing switch SB2 in parallel;
the coil KM _3, the three-phase three-wire normally open contact KM _1 and the single-phase normally open contact KM _2 are coil and contact switches of the same contactor.
The power distribution equipment electrification testing device in the figure 1 can provide various alternating current and direct current power supplies. The operation principle of the power distribution equipment energization testing device shown in fig. 1 is described in detail below:
when an alternating current power supply needs to be provided, the three-phase four-wire air switch QF1 and the three-phase four-wire air switch QF2 are closed, then the self-resetting closing switch SB2 is pressed (after the self-resetting closing switch SB2 is pressed, the SB2 is switched from an open state to a closed state), and at the moment, the coil KM _3 of the contactor is electrified; after the coil KM _3 is electrified, a three-phase three-wire normally open contact KM _1 and a single-phase normally open contact KM _2 of the contactor are automatically attracted; after the single-phase normally open contact KM _2 is sucked, the self-resetting closing switch SB2 can be bypassed, and at the moment, the self-resetting closing switch SB2 can be loosened without the power loss of the coil KM _3, namely, the self-resetting closing switch SB2 can be loosened without the disconnection of the three-phase three-wire normally open contact KM _1 and the single-phase normally open contact KM _ 2; after the three-phase three-wire normally open contact KM _1 is pulled in, the three-phase four-wire main line can realize three-phase AC380V output and single-phase AC220V output.
When the direct current power supply is required to be provided, the closed three-phase four-wire air switch QF1 supplies power to the direct current voltage regulator and then regulates the output voltage of the direct current voltage regulator (the adjustable range of the direct current voltage regulator can be DC 0V-DC 250V, the direct current voltage regulator is, for example, a manual direct current voltage regulator, and the voltage regulating knob of the manual direct current voltage regulator can regulate the voltage grade output by the manual direct current voltage regulator), so that the direct current power supply with the voltage grade required by the test can be obtained.
One of the functions of the three-phase four-wire air switch QF1 and the three-phase four-wire air switch QF2 is to prevent an electric shock accident caused by burning-out of the contacts. For example, the following steps: if the three-phase four-wire air switch QF1 and the three-phase four-wire air switch QF2 are not arranged, if the first normally open contact KM _1 and/or the second normally open contact KM _2 are burnt and adhered, no matter whether the self-resetting closing switch SB2 is pressed, the three-phase four-wire main line can always output alternating current and direct current power supplies, and an electric shock accident can be caused if a worker accidentally touches the three-phase four-wire air switch. In addition, because the air switches are respectively arranged at the power supply ends of the alternating current output power supply and the direct current output power supply, whether the power supply supplies power or not is conveniently observed and measured during maintenance and debugging, and the tested equipment and the personal safety can be protected.
In addition, because the air switch belongs to a load switch, the air switch is provided with an arc extinguishing device, the breaking capacity is extremely strong, and the operation with load is allowed, when the alternating current power supply and the direct current power supply do not need to be continuously output after the power distribution equipment is electrified, the three-phase four-wire air switch QF1 and the three-phase four-wire air switch QF2 are firstly disconnected, then the self-resetting separating brake switch SB1 is pressed (the SB1 is switched from a closed state to a disconnected state after the self-resetting separating brake switch SB1 is pressed), the coil KM _3 is disconnected after the power is cut off, the three-phase three-wire normally open contact KM _1 and the single-phase normally open contact KM _2 are automatically disconnected, and at the moment, the power distribution equipment electrification testing device stops outputting the alternating current power supply and the direct current power supply.
As can be seen from the above description, the embodiment of the utility model provides a when going on distribution equipment circular telegram test, closed three-phase four-wire air switch QF1 and three-phase four-wire air switch QF2 earlier, press from restoring to the throne closing switch SB2 again, three-phase four-wire system main line can realize three-phase AC380V output, single-phase AC220V output and dc power supply output this moment. It is visible, the embodiment of the utility model provides a multiple friendship, DC power supply are provided simultaneously with a distribution equipment circular telegram test device to solved and needed the condition that a plurality of distribution equipment circular telegram test device used jointly could accomplish the circular telegram test to distribution equipment among the prior art, labour saving and time saving economizes the cost.
Optionally, based on any one of the embodiments disclosed above, referring to fig. 2, a fuse FU is further connected in series on the control line, and is used for automatically cutting off a power supply and protecting equipment and personal safety in the case of a short circuit.
Optionally, based on any one of the embodiments disclosed above, referring to fig. 3, the power distribution equipment energization testing apparatus further includes: the storage battery is used for independently supplying power to the direct current voltage regulator, and at the moment, under the condition that the three-phase four-wire air switch QF1 is not closed, the storage battery can also be used for taking power, so that the output of a direct current power supply with voltage level required by a test is realized.
Optionally, based on any of the embodiments disclosed above, the self-resetting opening switch SB1 used in the embodiments of the present invention is, for example, a self-resetting opening button. The embodiment of the utility model provides an in use from reset closing switch SB2 for example for from reset closing button. Fig. 4 is a front view of an appearance structure of the power distribution equipment energization testing apparatus, and a reference numeral 7 in fig. 4 denotes a chassis; the mark 12 represents a self-resetting switching-on button and a self-resetting switching-off button which are positioned on an operation panel of the case; the mark 3 represents a mounting guide rail positioned in the case and used for fixing components such as a contactor, a fuse FU and the like; the label 1 represents the storage battery located in the case; reference numeral 11 denotes a three-phase four-wire air switch QF1 and a three-phase four-wire air switch QF2 located on the chassis operating panel.
Optionally, based on any of the embodiments disclosed above, the dc output end and/or the ac output end of the three-phase four-wire main line are provided with an instrument for testing voltage levels (see also fig. 4, where the identifier 8 and the identifier 10 respectively indicate an instrument set at the dc output end and an instrument set at the ac output end), so that a worker can visually see the voltage level output by the power distribution equipment energization testing apparatus, thereby preventing the occurrence of the situation where an element is burned due to an excessively high voltage and an element is not operated due to an excessively low voltage level. The meter for testing the voltage level may be a needle meter or a digital display meter, and is not limited.
Optionally, based on any one of the above-mentioned embodiments disclosed, the bottom of the box body of the power distribution equipment energization testing apparatus is provided with a plurality of steering wheels, still referring to fig. 4, for example, four steering wheels 14 capable of rotating 360 degrees are installed to facilitate movement, and fig. 5 is an appearance structure test diagram of the power distribution equipment energization testing apparatus.
When the dc voltage regulator in any of the embodiments disclosed above is a manual dc voltage regulator, the voltage regulating knob 5 is disposed on the operating panel of the chassis, for example, as shown in fig. 6.
Optionally, based on any one of the embodiments disclosed above, referring to fig. 7, the power distribution equipment energization testing apparatus further includes: and the start/stop indicator lamp 6 is used for indicating whether the power distribution equipment energization testing device is in a start state or a stop state.
Optionally, based on any one of the embodiments disclosed above, still referring to fig. 7, the power distribution equipment energization testing apparatus further includes: and the alarm lamp 9 sends an alarm signal to remind non-workers of forbidding entering a working area during working, so that the current working area is reminded of electrical danger and personal safety is protected.
Furthermore, the embodiment of the utility model provides a distribution equipment circular telegram test equipment is still disclosed, including many sets as above any kind of distribution equipment circular telegram test device.
Taking the power distribution equipment power-on test equipment with two sets of power distribution equipment power-on test devices as an example, at this time, the power distribution equipment power-on test equipment can provide two paths of AC380V output, one path of AC220V output, one path of DC24V output and one path of DC48V output according to actual needs.
The two paths of AC380V are output simultaneously, and can be used for the following functional tests of low-voltage complete equipment in a single-bus segmented wiring mode: the function test of auto-switching auto-resetting, auto-switching non-auto-resetting and loop closing is to provide working power supply and digital display meter parameter setting for a digital display meter voltmeter and an ammeter of a wire feeding cabinet, also provide three-phase four-wire sampling voltage for the digital display voltmeter and a pointer voltmeter, and provide working power supply and operating power supply for a switching-on and switching-off indicator lamp, a switching-on and switching-off operation, an energy storage indicator lamp and an energy storage motor; the parameter setting of a working power supply and a digital display meter can be provided for a switching-on and switching-off indicator lamp and the digital display ammeter of the outgoing line cabinet breaker; and the reactive compensation controller of the capacitor cabinet can also provide a working power supply and an operating power supply for a transformation ratio, a compensation mode and a manual and automatic switching capacitor.
The single-path AC220V output can be used as the following power supply used when the power distribution equipment is subjected to a power-on test before leaving a factory: a working power supply of an illumination loop, a temperature and humidity controller and a fan in the centrally installed switchgear; a temperature and humidity controller in the ring main unit, a power supply module for charging and a working power supply of an exhaust fan; the box transformer substation comprises a lighting lamp, a heat dissipation device and an alarm device working power supply; and when the goods are put in inspection, power is supplied to the elements needing working power supply.
The DC24V output and the DC48V output can be used as the following power supplies used for power distribution equipment such as a ring main unit, an opening and closing station and the like to carry out a power-on test before leaving a factory: an electric mechanism operation power supply, an energy storage mechanism power supply, an energy storage indicating lamp power supply, a separating and closing operation and opening and closing indicating power supply, a protection device power supply and an on-column circuit breaker are used for charging and operating power supplies of batteries of an FTU (Feeder Terminal Unit) and a DTU (Distribution Terminal Unit); DC24V may also be used to debug devices with fire fighting cut-off capabilities.
Or, still taking the example that the distribution equipment energization testing equipment has two sets of distribution equipment energization testing devices, at this time, the distribution equipment energization testing equipment can also provide two-way AC380V output, one-way AC220V output, one-way DC110V output and one-way DC220V output according to actual needs, and the two-way AC380V output and the one-way AC220V output have the same purpose; the DC110V and DC220V can provide direct current power for an operation loop, an energy storage loop, a locking loop, a protection device and an operation device in the centrally installed switchgear, and provide operation power for indicating lamps and mechanisms of each loop.
In the present specification, each embodiment is described in a progressive manner, and the emphasis of each embodiment is on the difference from the other embodiments, and the same and similar parts among the embodiments may be referred to each other, and are not described again.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A power distribution equipment power-on test device is characterized by comprising: a three-phase four-wire system main line and a control line;
the three-phase four-wire system main circuit is provided with: the three-phase four-wire air switch QF1 is connected to the wire inlet side, the three-phase four-wire air switch QF2 is connected to the wire outlet side, the three-phase three-wire normally open contact KM _1 is connected between the three-phase four-wire air switch QF1 and the three-phase four-wire air switch QF2 in series, and the direct-current voltage regulator is connected to any two wires between the three-phase four-wire air switch QF1 and the three-phase three-wire normally open contact KM _1 at the input end;
the control circuit is connected between any two wires between the three-phase four-wire air switch QF1 and the three-phase three-wire normally open contact KM _ 1;
the control circuit is provided with: the system comprises a self-resetting closing switch SB2, a self-resetting separating switch SB1, a coil KM _3 and a single-phase normally open contact KM _2, wherein the self-resetting closing switch SB2, the self-resetting separating switch SB1 and the coil KM _3 are connected in series, and the single-phase normally open contact KM _2 is connected with the self-resetting closing switch SB2 in parallel;
the coil KM _3, the three-phase three-wire normally open contact KM _1 and the single-phase normally open contact KM _2 are coils and contact switches of the same contactor.
2. The power distribution equipment energization testing device according to claim 1, wherein the dc voltage regulator is a manual dc voltage regulator, and the voltage level output by the manual dc voltage regulator can be adjusted by rotating a voltage regulating knob thereof.
3. The electrical distribution equipment energization testing device according to claim 1, wherein a fuse is further connected in series on the control circuit.
4. The electrical distribution equipment energization testing device according to claim 1, further comprising: the input end of the direct current voltage regulator is connected to the storage battery.
5. The electrical distribution equipment energization testing device according to claim 1, wherein the dc output and/or the ac output of the three-phase four-wire main line are each provided with a meter for testing a voltage level.
6. The electrical distribution equipment energization testing device according to claim 1, further comprising: and the starting/stopping indicator light is used for indicating whether the power distribution equipment energization testing device is in a starting state or a stopping state.
7. The electrical distribution equipment energization testing device according to claim 1, further comprising: and the alarm lamp sends out an alarm signal when the power distribution equipment electrification testing device works.
8. The electrical distribution equipment energization testing device according to claim 1, wherein a plurality of steering wheels are installed at a bottom of a box body of the electrical distribution equipment energization testing device.
9. The electrical distribution equipment energization testing device according to claim 8, wherein the steering wheel is a 360-degree rotatable steering wheel.
10. A distribution equipment energization testing device is characterized by comprising: a plurality of sets of power distribution equipment energization testing devices as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220696443.9U CN217332690U (en) | 2022-03-28 | 2022-03-28 | Power distribution equipment power-on test device and power-on test equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220696443.9U CN217332690U (en) | 2022-03-28 | 2022-03-28 | Power distribution equipment power-on test device and power-on test equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217332690U true CN217332690U (en) | 2022-08-30 |
Family
ID=83002508
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220696443.9U Active CN217332690U (en) | 2022-03-28 | 2022-03-28 | Power distribution equipment power-on test device and power-on test equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217332690U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11927336B1 (en) | 2023-07-25 | 2024-03-12 | Jianmin Shao | Fresco lamp capable of being freely plugged with LEDs and electrified |
-
2022
- 2022-03-28 CN CN202220696443.9U patent/CN217332690U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11927336B1 (en) | 2023-07-25 | 2024-03-12 | Jianmin Shao | Fresco lamp capable of being freely plugged with LEDs and electrified |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204497589U (en) | Multifunctional ligand electrical control cabinet | |
| CN205811653U (en) | Capacitor tripping device for automatic power supply conversion | |
| CN217332690U (en) | Power distribution equipment power-on test device and power-on test equipment | |
| CN219576637U (en) | Multi-protection control system for urban rail distribution box and distribution box | |
| CN219142984U (en) | No-load stability test device for 10kV high-voltage cabinet | |
| RU67787U1 (en) | ELECTRICAL DISTRIBUTION DEVICE | |
| CN204103259U (en) | A kind of switch cubicle of improvement | |
| CN203519676U (en) | Detection device for electronic components in middle-and-low-voltage equipment | |
| CN204516201U (en) | Comprehensive cable distribution Simulated training device is installed in interior lines | |
| CN207926263U (en) | Switchgear assembly with alternative DC control supply | |
| CN217769450U (en) | Alternating current electric energy control circuit, power supply equipment and power utilization system | |
| CN206922506U (en) | A kind of intelligent integrated switch board circuit | |
| CN216929301U (en) | Block terminal is synthesized to integral type low pressure | |
| TWI691135B (en) | Control display integrated device with display self-tripping power status | |
| CN219554656U (en) | Maintenance power distribution optimizing equipment | |
| CN221040301U (en) | Power supply principle experiment box | |
| CN215932894U (en) | High-voltage electrician special operation practice examination system | |
| CN212781025U (en) | Bus differential protection debugging simulation device in running state | |
| CN219321042U (en) | Intelligent control device for subway LED large screen | |
| JP2948106B2 (en) | High-voltage load switch-on alarm | |
| CN222851851U (en) | A control room of a high voltage distribution cabinet | |
| CN218997768U (en) | Power distribution control monitoring device | |
| CN209979715U (en) | Control box capable of replacing electric energy meter in electrified mode | |
| CN219142983U (en) | Power consumption information acquisition terminal joint debugging device | |
| CN219179517U (en) | Charging detection device for user field 10kV high-voltage frequency converter power unit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |