CN207559438U - A kind of easy to operate intelligent protection grounding box - Google Patents
A kind of easy to operate intelligent protection grounding box Download PDFInfo
- Publication number
- CN207559438U CN207559438U CN201721649459.XU CN201721649459U CN207559438U CN 207559438 U CN207559438 U CN 207559438U CN 201721649459 U CN201721649459 U CN 201721649459U CN 207559438 U CN207559438 U CN 207559438U
- Authority
- CN
- China
- Prior art keywords
- knife switch
- seat
- break
- voltage
- phase knife
- 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
- 230000004224 protection Effects 0.000 title claims abstract description 14
- 238000009434 installation Methods 0.000 claims abstract description 31
- 238000001514 detection method Methods 0.000 claims abstract description 26
- 239000000523 sample Substances 0.000 claims abstract description 15
- 230000009471 action Effects 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims abstract description 4
- 230000008569 process Effects 0.000 claims abstract description 4
- 238000012360 testing method Methods 0.000 claims abstract description 4
- 230000008054 signal transmission Effects 0.000 claims description 40
- 230000004913 activation Effects 0.000 claims description 11
- 230000000903 blocking effect Effects 0.000 claims description 7
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 abstract description 11
- 230000005611 electricity Effects 0.000 description 7
- 239000004020 conductor Substances 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
Landscapes
- Details Of Connecting Devices For Male And Female Coupling (AREA)
Abstract
The utility model provides a kind of easy to operate intelligent protection grounding box, it is equipped on housing seat close and make the infrared probe of corresponding linkage action and voltage detection module for detecting low-voltage circuit current voltage value for testing staff, three-phase knife switch and combined floodgate seat are installed on housing seat, combined floodgate seat is equipped with break-make electric installation, break-make electric installation is used in three-phase knife switch making process for the power on/off of three-phase knife switch, when have service personnel close to when, voltage detection module detects low pressure main line current voltage value, it is then realized and powered off by break-make electric installation if there is voltage, it can not realize and be connect with ground wire, it can carry out safe back brake and line maintenance, it avoids accidentally overlapping plug-in strip operation, the effective generation for preventing line short accident；When voltage detection module detection low pressure main line, there is currently no voltage values, are realized and are powered by break-make electric installation, are grounded protection, entire grounding box can substitute earth plate completely, more convenient, time saving and energy saving, securely and reliably.
Description
Technical field
The utility model is related to a kind of grounding box more particularly to a kind of easy to operate intelligent protection grounding boxes.
Background technology
At home and abroad in power grid safety accident, since ground wire hitching problem causes electric shock or equipment short circuit etc. in maintenance
Situation is in the great majority, and particularly under complicated low-voltage distribution environment, realizes that the safety inspection of circuit is very necessary.Circuit is carried out
Necessary specification hanging earthing conductor during interruption maintenance, this is a very crucial measure, is one to service personnel's personal safety
Maximum ensures.But since existing distribution line is in design and construction, safety ground protection when not yet considering maintenance will
It asks, the setting, dead line in grounding body are hung in the mode of operation of ground wire, fail to provide unified ground connection operating device,
Sometimes even without the upper lead of suitable ground connection and earth point.This brings great inconvenience to the operation of dead line hanging earthing conductor.
Under existing situation, new energy is registered one's residence, and can further increase the complexity of power distribution network against feed-in net.During maintenance,
The problems such as preventing reclosing when release, the maintenance that not only to consider residual electric energy in subscribers' line and equipment, it is also contemplated that user
The inverse energy regenerative amount of side from ground short circuit and prevents from damaging service personnel.Traditional low-voltage distributing line, which has a power failure, to be examined
When repairing, three cable runs are grounded using single grounding rod, it is impossible to science intelligence judge dead line operation when be
No also there are remaining voltages, can not ensure line facility and personal safety.And every time when dead line overhauls, Dou Yaosui
When it is inconvenient to carry everywhere, it is also necessary to grounding rod is docked with the circuit being grounded, in labor intensive working hour, there are security risks.
Invention content
The purpose of this utility model is to provide intelligent protections a kind of easy to operate, that mistake coincidence plug-in strip can be avoided to operate
Grounding box.
In order to achieve the above object, the utility model adopts the following technical solution：A kind of easy to operate intelligent protection connects
Ground case, including housing seat and Box Cover, be equipped on the housing seat infrared probe, infrared signal transmission module, processor and
Voltage detection module, the infrared probe is close and make corresponding linkage action for testing staff, the infrared probe with
Infrared signal transmission module is electrically connected, and the infrared signal transmission module is electrically connected with processor, the voltage detection module and
Processor is electrically connected, and the voltage detection module shows for detecting low-voltage circuit current voltage value and passing through voltage display screen,
Three-phase knife switch and combined floodgate seat are installed, the combined floodgate seat is equipped with break-make electric installation, the break-make electric installation on the housing seat
For the power on/off for three-phase knife switch in three-phase knife switch making process.
Further, the three-phase knife switch is mounted on by shaft on shaft seat, and the shaft seat passes through blade mounting seat
On housing seat.
Further, handle is equipped with by plug-in strip connecting shaft on the three-phase knife switch.
Further, the described one end of combined floodgate seat far from housing seat is equipped with installation axle perpendicular to the side of housing seat, institute
It states installation axle and installing plate is installed by being connected axis, contact plate is installed in the mounting base, the contact plate is connect with ground wire,
Break-make electric installation is installed on the contact plate.
Further, the break-make electric installation includes being arranged symmetrically limiting plate and relative to contact plate for driving limiting plate
The motor of horizontal movement, the installing plate is interior to be equipped with sliding slot, and the limiting plate is installed on the chute by pulley, the motor peace
Mounted in installing plate lower end, the motor is equipped with piston and piston shaft, the piston shaft and limiting plate close to the side of limiting plate
It is fixed, activation signal transmission module is installed on the installing plate, the activation signal transmission module is electrically connected with contact plate, institute
It states and motor power on/off signal transmission module is installed on motor, the motor power on/off signal transmission module is electrically connected with motor,
The motor power on/off signal transmission module and activation signal transmission module are electrically connected with processor.
Further, the limiting plate close to one end of contact plate be equipped with blocking portion, the blocking portion width be H1, institute
It is H2, the H2≤H1 to state contact plate and protrude from installing plate arrangement and the width of protrusion.
Further, after the limiting plate is contacted with contact plate, the internal diameter of the limiting plate opening is L1, the three-phase
A diameter of L2 of plug-in strip, the L1 ＜ L2.
After adopting the above technical scheme, the utility model has the following advantages that：
1st, to sense personnel by infrared probe close, when have service personnel close to when, infrared signal transmission module is by work
Signal passes to voltage detection module so that voltage detection module detects low pressure main line current voltage value, if low pressure main line
There is currently voltages on road, then are shown by voltage display screen, and there will be the signals of voltage to pass to processor, and by processor
Signal is passed into break-make electric installation and realizes power-off, can not realize and be connect with ground wire, safe back brake and circuit inspection can be carried out
It repaiies, avoids accidentally overlapping plug-in strip operation, effectively prevent the generation of line short accident；When voltage detection module detects low pressure main line
There is currently no voltage values on road, then show no-voltage by voltage display screen, and the signal of no-voltage is passed to processor, and
Signal is passed into break-make electric installation by processor and realizes energization, is grounded protection.Entire grounding box can substitute completely to be connect
Floor, it is more convenient, it is time saving and energy saving, securely and reliably.
2nd, three-phase knife switch is driven to rotate the folding of realization three-phase knife switch on shaft seat by shaft, and passes through plug-in strip and install
Seat realizes the electrical connection of three-phase knife switch, can effectively avoid the danger of electric leakage, improve the safety of the folding of three-phase knife switch.
3rd, three-phase knife switch is driven to realize insulation by handle, facilitates the folding of three-phase knife switch, improve three-phase knife switch
The convenience of folding.
4th, combined floodgate seat is installed on housing seat by installation axle, and contact plate is installed by mounting base on the mounting shaft, led to
It crosses contact plate to connect with ground wire, and the break-make for break-make electric installation being set to be grounded on contact plate is electrically operated, improves ground connection
The electrically operated reliability of break-make, and the path of three-phase knife switch switching is shortened, the convenience of three-phase knife switch switching is improved,
Facilitate the switching operation of three-phase knife switch.
5th, to sense personnel by infrared probe close, when have service personnel close to when, infrared signal transmission module is by work
Signal passes to voltage detection module so that voltage detection module detects low pressure main line current voltage value, if low pressure main line
Road then shows voltage value there is currently voltage by voltage display screen, and there will be the signals of voltage to pass to processor, and by
Signal is passed to motor power on/off signal transmission module by processor, and working signal is transmitted to electricity by motor break-make electrical transmission module
Machine, motor works so that piston and piston shaft cooperation so that the limiting plate contact being arranged symmetrically, and so that three-phase knife switch can not be with
Contact plate contacts, and can not realize and be connect with ground wire, can carry out safe back brake and line maintenance, avoids accidentally overlapping plug-in strip behaviour
Make, effectively prevent the generation of line short accident；When voltage detection module detection low pressure main line, there is no voltage values, then lead to
Overvoltage display screen shows no-voltage, closes three-phase knife switch at this time and realizes that three-phase knife switch is contacted with contact plate, when contact plate and three
After the contact of phase plug-in strip, signal is passed to processor by activation signal transmission module, and signal is passed to motor break-make by processor
Electric signal transmission module realizes that motor driving piston and piston shaft realize limiting plate to three by motor power on/off signal transmission module
The extruding of phase plug-in strip is realized and the limiting of three-phase knife switch is fixed, and realizes the ground connection of three-phase knife switch, avoids three-phase knife switch due to weight
Power acts on and occurs disconnecting grounding connection after closing a floodgate, and improves the reliability of grounding box ground connection, improves the safety of grounding box,
Entire ground connection case apparatus can substitute earth plate completely, more convenient, time saving and energy saving, securely and reliably.
6th, it realizes when being fixed to three-phase knife switch, the periphery that limiting plate is capable of fully wrapped around three-phase knife switch is real
Now stablizing for three-phase knife switch is limited, avoids three-phase knife switch being caused to fall grounding connection is caused to disconnect, is carried when limiting not exclusively
The high reliability of ground connection, further improves the safety of ground wire.
7th, three-phase knife switch diameter is set smaller than by strength in the opening after limiting plate is contacted with each other so that exist
During voltage, it can realize that plug-in strip under the shielding action of limiting plate, can not contact with contact plate and be grounded and disconnect, energy
Enough back brakes and line maintenance for carrying out safety avoid accidentally overlapping plug-in strip operation, effectively prevent the generation of line short accident.
Description of the drawings
The utility model is described in further detail below in conjunction with the accompanying drawings：
Fig. 1 provides a kind of main structure diagram of easy to operate intelligent protection grounding box for the utility model；
Fig. 2 provides a kind of left view structural representation of easy to operate intelligent protection grounding box for the utility model
Fig. 3 is the close-up schematic view at A in Fig. 1；
Fig. 4 is the close-up schematic view at B in Fig. 3；
It is as follows that the names of the parts are marked in figure：
1- housing seats, 2- infrared signal transmission modules, 3- infrared probes, 4- processors, 5- voltage detection modules, 6- electricity
Press display screen, 7- combined floodgate seats, 8- shaft seats, 9- blade mounting seats, 10- three-phase knife switchs, 11- plug-in strip connecting shafts, 12- handles, 13-
Shaft, 14- installation axles, 15- linking axis, 16- installing plates, 17- sliding slots, 18- activation signal transmission modules, 19- pulleys, 20- electricity
Machine, 21- pistons, 22- piston shafts, 23- limiting plates, 24- contact plates, 25- motor power on/off signal transmission modules, 26- blocking portions.
Specific embodiment
Below in conjunction with drawings and the specific embodiments, the utility model is described in further detail.
As shown in Figs 1-4, the utility model provides a kind of easy to operate intelligent protection grounding box, including 1 He of housing seat
Box Cover 13 is equipped with infrared probe 3, infrared signal transmission module 2, processor 4 and voltage detection module 5 on housing seat 1,
Infrared probe 3 is close and make corresponding linkage action for testing staff, infrared probe 3 and 2 electricity of infrared signal transmission module
Connection, infrared signal transmission module 2 are electrically connected with processor 4, and voltage detection module 5 is electrically connected with processor 4, voltage detecting mould
Block 5 shows for detecting low-voltage circuit current voltage value and passing through voltage display screen 6, and three-phase knife switch 10 is equipped on housing seat 1
With combined floodgate seat 7, combined floodgate seat 7 is equipped with break-make electric installation, and break-make electric installation is used in 10 making process of three-phase knife switch for three-phase
The power on/off of plug-in strip 10.By infrared probe 3 sense personnel it is close, when have service personnel close to when, infrared signal transmission module 2
Working signal is passed into voltage detection module 5 so that voltage detection module 5 detects low pressure main line current voltage value, if
There is currently voltages for low pressure main line, then are shown by voltage display screen 6, and there will be the signals of voltage to pass to processor 4,
And signal is passed into break-make electric installation by processor 4 and realizes power-off, it can not realize and be connect with ground wire, safe fall can be carried out
Lock and line maintenance avoid accidentally overlapping plug-in strip operation, effectively prevent the generation of line short accident；When voltage detection module 5
Detecting low pressure main line, there is currently no voltage values, then show no-voltage, and the signal of no-voltage is passed by voltage display screen 6
Processor 4 is passed, and signal is passed into break-make electric installation by processor 4 and realizes energization, is grounded protection.Entire grounding box
Earth plate can be substituted completely, it is more convenient, it is time saving and energy saving, securely and reliably.
In the present embodiment, three-phase knife switch 10 is mounted on by shaft 13 on shaft seat 8, and shaft seat 8 passes through blade mounting seat 9
On housing seat 1.The folding for realizing three-phase knife switch 10 is rotated on shaft seat 8 by the driving three-phase knife switch 10 of shaft 13,
And pass through the electrical connection that blade mounting seat 9 realizes three-phase knife switch 10, the danger of electric leakage can be effectively avoided, improves three-phase knife switch
The safety of 10 folding.
In the present embodiment, handle 12 is equipped with by plug-in strip connecting shaft 11 on three-phase knife switch 10.Three are driven by handle 12
Phase plug-in strip 10 realizes insulation, facilitates the folding of three-phase knife switch 10, improves the convenience of 10 folding of three-phase knife switch.
In the present embodiment, the one end of combined floodgate seat 7 far from housing seat 1 is equipped with installation axle 14 perpendicular to the side of housing seat 1,
Installation axle 14 is equipped with installing plate 16 by being connected axis, and contact plate 24 is equipped in mounting base 19, and contact plate 24 connects with ground wire
It connects, break-make electric installation is installed on contact plate 24.Combined floodgate seat 7 is installed, and in installation axle 7 on housing seat 1 by installation axle 14
It is upper that contact plate 24 is installed by mounting base 19, it is connect by contact plate 24 with ground wire, and break-make Denso is set on contact plate 24
It puts that the break-make being grounded is electrically operated, improves the electrically operated reliability of ground connection break-make, and shorten 10 switching of three-phase knife switch
Path, improve the convenience of 10 switching of three-phase knife switch, facilitate the switching operation of three-phase knife switch 10.
In the present embodiment, break-make electric installation includes being arranged symmetrically limiting plate 23 relative to contact plate 24 and be limited for driving
The motor 20 of 23 horizontal movement of plate, installing plate 16 is interior to be equipped with sliding slot 17, and limiting plate 23 is mounted on by pulley 19 on sliding slot 17, electricity
Machine 20 is mounted on 16 lower end of installing plate, and motor 20 is equipped with piston 21 and piston shaft 22, piston shaft close to the side of limiting plate 23
22 fix with limiting plate 23, activation signal transmission module 18 are equipped on installing plate 16, activation signal transmission module 18 is with contacting
Plate 24 is electrically connected, and is equipped with motor power on/off signal transmission module 25 on motor 20, motor power on/off signal transmission module 25 with
Motor 20 is electrically connected, and motor power on/off signal transmission module 25 and activation signal transmission module 18 are electrically connected with processor 4.It is logical
Cross infrared probe 3 sense personnel it is close, when have service personnel close to when, infrared signal transmission module 2 passes to working signal
Voltage detection module 5 so that voltage detection module 5 detects low pressure main line current voltage value, if low pressure main line is currently deposited
In voltage, then voltage value is shown by voltage display screen 6, and there will be the signals of voltage to pass to processor 4, and by processor
Signal is passed to motor power on/off signal transmission module 25 by 4, and working signal is transmitted to electricity by motor break-make electrical transmission module 28
Machine 20, motor 20 works so that piston 21 and piston shaft 22 coordinate so that the limiting plate 23 being arranged symmetrically contacts, and causes three-phase
Plug-in strip 10 can not be contacted with contact plate 24, can not be realized and be connect with ground wire, can be carried out safe back brake and line maintenance, be avoided
Plug-in strip operation is accidentally overlapped, effectively prevents the generation of line short accident；It is not deposited when voltage detection module 5 detects low pressure main line
In voltage value, then no-voltage is shown by voltage display screen 6, close three-phase knife switch 10 at this time and realize three-phase knife switch 10 and contact plate
24 contacts, after contact plate 24 is contacted with three-phase knife switch 10, signal is passed to processor 4 by activation signal transmission module 18, by
Signal is passed to motor power on/off signal transmission module 25 by processor 4, and electricity is realized by motor power on/off signal transmission module 25
Machine 20 drives piston 21 and piston shaft 22 to realize extruding of the limiting plate 23 to three-phase knife switch 10, realizes the limit to three-phase knife switch 10
Position is fixed, realizes the ground connection of three-phase knife switch 10, avoids three-phase knife switch 10 and occurs disconnecting ground connection after closing a floodgate due to gravity
Connection improves the reliability of grounding box ground connection, improves the safety of grounding box, and the entire case apparatus that is grounded can substitute completely
Earth plate, it is more convenient, it is time saving and energy saving, securely and reliably.
In the present embodiment, limiting plate 23 is equipped with blocking portion 26 close to one end of contact plate 24, and 26 width of blocking portion is H1, is connect
Touch panel 24 protrude from installing plate 16 arrange and the width of protrusion be H2, the H2≤H1.It realizes to three-phase knife switch 10
When fixing, limiting plate 23 is capable of stability line of the periphery realization to three-phase knife switch 10 of fully wrapped around three-phase knife switch 10
Position avoids three-phase knife switch 10 being caused to fall grounding connection is caused to disconnect, improves the reliability of ground connection when limiting not exclusively, into
One step improves the safety of ground wire.
In the present embodiment, after limiting plate 23 is contacted with contact plate 24, the internal diameter of 23 opening of limiting plate is L1, three-phase knife switch
10 a diameter of L2, L1 ＜ L2.Three-phase knife switch 10 is set smaller than by strength in the opening after limiting plate 23 is contacted with each other
Diameter so that there are that during voltage, can realize plug-in strip under the shielding action of limiting plate 23, can not be contacted with contact plate 24
And be grounded and disconnect, safe back brake and line maintenance can be carried out, avoids accidentally overlapping plug-in strip operation, is effectively prevented
The generation of line short accident.
In addition to above preferred embodiment, the utility model also has other embodiments, and those skilled in the art can root
It is made various changes and modifications according to the utility model, without departing from the spirit of the utility model, the utility model should all be belonged to
Range defined in appended claims.
Claims (7)
1. a kind of easy to operate intelligent protection grounding box, including housing seat and Box Cover, which is characterized in that on the housing seat
Infrared probe, infrared signal transmission module, processor and voltage detection module are installed, the infrared probe is used for testing staff
Close and make corresponding linkage action, the infrared probe is electrically connected with infrared signal transmission module, and the infrared signal passes
Defeated module is electrically connected with processor, and the voltage detection module is electrically connected with processor, and the voltage detection module is used to detect
Low-voltage circuit current voltage value simultaneously passes through voltage display screen and shows, three-phase knife switch and combined floodgate seat, institute are equipped on the housing seat
Combined floodgate seat is stated equipped with break-make electric installation, the break-make electric installation is used in three-phase knife switch making process for the logical of three-phase knife switch
Power-off.
2. grounding box according to claim 1, which is characterized in that the three-phase knife switch is mounted on shaft seat by shaft
On, the shaft seat is mounted on by blade mounting seat on housing seat.
3. grounding box according to claim 2, which is characterized in that be equipped on the three-phase knife switch by plug-in strip connecting shaft
Handle.
4. grounding box according to claim 1, which is characterized in that the described one end of combined floodgate seat far from housing seat is perpendicular to case
The side of housing is equipped with installation axle, and the installation axle is equipped with installing plate by being connected axis, is equipped with and connects in the mounting base
Touch panel, the contact plate are connect with ground wire, and break-make electric installation is equipped on the contact plate.
5. grounding box according to claim 4, which is characterized in that the break-make electric installation includes symmetrical relative to contact plate
It arranges limiting plate and the motor for driving limiting plate horizontal movement, is equipped with sliding slot in the installing plate, the limiting plate passes through
Pulley is installed on the chute, and the motor is mounted on installing plate lower end, and the motor is equipped with piston close to the side of limiting plate
And piston shaft, the piston shaft are fixed with limiting plate, and activation signal transmission module, the contact letter are equipped on the installing plate
Number transmission module is electrically connected with contact plate, and motor power on/off signal transmission module, the motor break-make are equipped on the motor
Electric signal transmission module is electrically connected with motor, the motor power on/off signal transmission module and activation signal transmission module with place
Manage device electrical connection.
6. grounding box according to claim 5, which is characterized in that the limiting plate is equipped with blocking close to one end of contact plate
Portion, the blocking portion width are H1, and the contact plate protrudes from the width of installing plate arrangement and protrusion as H2, the H2≤
H1。
7. grounding box according to claim 5, which is characterized in that after the limiting plate is contacted with contact plate, the limiting
The internal diameter of plate opening be L1, a diameter of L2 of the three-phase knife switch, the L1 ＜ L2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721649459.XU CN207559438U (en) | 2017-12-01 | 2017-12-01 | A kind of easy to operate intelligent protection grounding box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721649459.XU CN207559438U (en) | 2017-12-01 | 2017-12-01 | A kind of easy to operate intelligent protection grounding box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207559438U true CN207559438U (en) | 2018-06-29 |
Family
ID=62678615
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721649459.XU Active CN207559438U (en) | 2017-12-01 | 2017-12-01 | A kind of easy to operate intelligent protection grounding box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207559438U (en) |
-
2017
- 2017-12-01 CN CN201721649459.XU patent/CN207559438U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105548784B (en) | A kind of electric vehicle direct current vehicle interface circuit simulator | |
| CN202126470U (en) | Power cable insulation online monitoring device | |
| CN104917062A (en) | Intelligent switch cabinet control system | |
| CN208015083U (en) | A kind of new type grounding device | |
| CN208046026U (en) | Generator car access case and station power use system | |
| CN207559438U (en) | A kind of easy to operate intelligent protection grounding box | |
| CN201821032U (en) | Overvoltage suppression cabinet | |
| CN201887337U (en) | Grounding mechanism for high-voltage switch equipment | |
| CN104749486B (en) | A kind of IT system single-phase fault localization method based on residual current operated protective device | |
| CN208094163U (en) | A kind of intelligent electric meter earth leakage protective alarm device | |
| CN206991977U (en) | A kind of blocking device for preventing power transformation operation back brake maloperation | |
| CN202333586U (en) | Switch cabinet bus grounding device | |
| CN202535046U (en) | Microcomputer monitoring and protection device for mine-used high-voltage switch | |
| CN207588272U (en) | A kind of protective grounding case applied to low-voltage circuit | |
| CN202903864U (en) | Electric leakage current detection device of single-phase AC power supply circuit | |
| CN209488166U (en) | A kind of generator neutral point earthing or grounding means | |
| CN104465160B (en) | Lock control module | |
| CN203846895U (en) | Safety protection device of manhole cover of locomotive | |
| CN203798891U (en) | Auxiliary device for measuring capacitance current of power distribution network under electrified condition | |
| CN207166138U (en) | A kind of subway station distribution system | |
| CN209656843U (en) | A kind of TBS valve thyristor grade off-line detection device | |
| CN208386124U (en) | A kind of neutral point drifting protective device | |
| CN202693726U (en) | Detection circuit and detection system for electric transmission and transformation equipment | |
| CN205680881U (en) | Bobbin cable universal connector the end of a thread | |
| CN216670134U (en) | Direct current of high prototype electric automobile fills electric pile detection test device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |