CN101685944A - Double safety switch box - Google Patents

Double safety switch box Download PDF

Info

Publication number
CN101685944A
CN101685944A CN200810222664A CN200810222664A CN101685944A CN 101685944 A CN101685944 A CN 101685944A CN 200810222664 A CN200810222664 A CN 200810222664A CN 200810222664 A CN200810222664 A CN 200810222664A CN 101685944 A CN101685944 A CN 101685944A
Authority
CN
China
Prior art keywords
card
casing
switch
safety
switch box
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.)
Pending
Application number
CN200810222664A
Other languages
Chinese (zh)
Inventor
陈锡瑜
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to CN200810222664A priority Critical patent/CN101685944A/en
Publication of CN101685944A publication Critical patent/CN101685944A/en
Pending legal-status Critical Current

Links

Images

Landscapes

  • Switch Cases, Indication, And Locking (AREA)

Abstract

The invention relates to a double safety switch box; a safety lock power switch is arranged on a disk surface of a box body for controlling the opening of the disk surface and power supplying at the same time; a main power supply loop can be controlled to be powered off forcibly while the disk surface is opened, so as to ensure the main power supply loop to be powered off before the disk surface of the box body is opened. The safety switch box is further provided with a contact terminal standardization mark for control and fixation, and an external winding displacement electrical-connection unit can be reserved. The double safety switch box has the advantages of simple structure, easy production, convenient installation, great maintenance and construction performance or good safety, and can lead the control contact and the fixed terminal to be standardized and marked.

Description

Double safety switch box
[technical field]
The present invention relates to about a kind of double safety switch box, make it connect the device of oversimplifying and promoting the maintenance fail safe particularly about a kind of double safety switch box device that can control the unlatching and the power supply supply of card simultaneously, and with the electronic control module formula.
[background technology]
Motor switch is the main device that power supply is given machinery or electrical equipment.Generally speaking, these motor switch are all installed concentratedly in a switch casing.The most frequently used motor switch is that (No-Fuse Breaker is called for short NFB to no-fuse switch; Or Molded Case Circuit Breaker, be called for short MCCB etc.).Based on no-fuse switch is a kind of overcurrent (OVERCURRENT) protective device; when it is in the off-normal position of escape (Trip) and machinery is shut down; have a lot of probability to be because lightning causes, or undesired electric current produce excessive pulse and escape.Common this situation is as long as the test and the replacement button of operator presses switch just can make no-fuse switch continue the path supply of current machinery is remained in operation.
Many electric accidents of past all occur in the maintenance or the improper operation of control of motor switch.Because in the maintenance of equipment of using power supply, a knowledge of often being misread by work on the spot person is: the electrical safety that takes in the machinery promptly interdicts the power button, can cut off all power supplys fully! But in fact, electrical safety in the machinery promptly interdicts the power button, only cut off the power supply in solenoid loop and produce escape, this danger button is inreal to cut off main power supply, but almost most people all to take for be to have cut off main power supply.
This wrong cognitive crisis that produces; mostly come from the operator who repairs or adjust machinery; the normal lazy main power source that does not further go to cut off the upstream; come the temporarily disconnected power supply and misapply this danger button; so that the operating personnel repairs dynamic power machine in maintenance; when perhaps entering machinery inside; just in case unwitting other third party's processes are arranged; see that no-fuse switch is in the off-normal position of escape (Trip); and machinery has stopped running; take for is because lightning or overcurrent cause escape; the handle of just pushing test and replacement button favorably and pulling no-fuse switch drops into again; this danger machinery will start immediately and produce danger, and many is that the harm of power source is all because cause like this with the motor.Above problem exists for a long time, but fails to properly settle always.
The improper operation of the maintenance of motor switch or control also often occurs in the electric system of Water-pumping motor.This system mainly be divided into casing, main power circuit, with three unit of control loop.The wherein control loop and the mode of connection, designed all different of each manufacturer that manufactures, the wiring mode that each motor personnel is accustomed to is also different, so the maintenance personal may not be certain to understand fully original design or first wife informant person's idea, often give up its original circuit docked mode when therefore keeping in repair, and the custom deallocation of complying with oneself in addition connects, and is just passable as long as Water-pumping motor can normally be started or stoped for its purpose.Many decades is constant because of following for this problem, so the switch-box after old or the process maintenance, its inner distribution is all close and numerous, at sixes and sevens.Also, will cause the accident of circuit abnormality or worker peace therefore just in case maintenance personal's distribution is a bit neglected.The electric machine control system of Water-pumping motor is when maintenance, and the incident that often meets accident causes maintenance personal's injures and deaths even.
These electric machine control systems and on-the-spot practice also have some problem and need to be resolved hurrily:
1. when the Pu was helped in maintenance, charged position can't cut off the power supply fully, so that the inductance accident may take place.
2. because load is excessive when causing live post (thermoelectric components) escape, must opens electrical switch box and carry out involution (Reset) and move, so touch charged position easily and worker's peace accident of electrification takes place.
3. external electricapparatus or control line for example are the water level sensors in the water treatment, because of the numbering difference that each operator designs voluntarily, make other maintenance personals be difficult for distinguishing when changing or keep in repair, and increase the degree of difficulty of maintenance.
Above problem exists for a long time, but fails to properly settle always.
[summary of the invention]
Main purpose of the present invention is to provide a kind of double safety switch box, can control the unlatching and the power supply supply of card simultaneously.
A time purpose of the present invention is to provide a kind of simple structure, produces easily, easy for installation, but maintenance construction or safety in utilization are splendid, will the control contact, the double safety switch box of fixed terminal normalization signization.
A further object of the present invention is to provide a kind of safety switch box of reserving external winding displacement contact, makes maintenance construction more convenient fast, and improves the fail safe of maintenance work.
For achieving the above object, the present invention designs a kind of double safety switch box, mainly is to be provided with the safety lock mains switch on the card of casing, can control the unlatching and the power supply supply of card simultaneously; And when opening card, can control main power circuit and force outage, before being unlocked, main power source opens circuit really with the card that guarantees casing.This safety switch box further indicates all control contacts, fixed terminal normalization, and can reserve external winding displacement contact.
Preferable, the card of above-mentioned casing is provided with the safety lock mains switch main power source of contacting, this safety lock mains switch is being controlled the card of this casing, and can control main power circuit and force outage, main power source was de-energized when this safety lock mains switch was unlocked, when being unlocked, main power source opens circuit really with the card that guarantees casing.When wherein this safety lock mains switch is unlocked, be the marker location that remains on maintenance, main power source promptly is de-energized.
Specifically, double safety switch box of the present invention, its mainly comprise a casing, one can open freely card on the casing, be fixed on box house motor switch, be fixed on the safety lock mains switch on the card, and this safety lock mains switch is connected in series with main power source.
Above-mentioned card is to be hubbed on the card that can open on the casing freely; And preferably, on this casing, can open freely at the transparent outer cover that can also be pivoted on this card.Inner card mainly is in order to the safety lock mains switch to be installed, and the motor switch of protection cabinet inside and distribution can not touched arbitrarily; The other purposes of card can also the setting operation hole, so that on card, see through this handle hole, and the motor switch in just can this card of direct control, such as be electromagnetic switch, do the involution test action during maintenance.Can also be provided with a fuse hole further on the card, insurance unit, power supply road is long lamp tube type fuse for example, allows its lid be exposed on the card outward, the convenient fuse of changing on card.
The aforementioned safety lock mains switch that is located on the card is the safety lock mains switch that is provided with key lock.In order to prevent the key loss, preferably be provided with a key on the card of casing and put the unit, place for the key of safety lock mains switch.This key is put a preferably holder of unit, and this key puts unit and be provided with a magnet, when this structure can make key be seated in key to put the unit, can firmly be held by magnet.
Can open transparent outer cover freely on casing, its purposes mainly is in order to needn't opening enclosing cover, just can see that fuse on the card, motor switch, indicator light etc. are normally or unusual with visual.This transparent outer cover preferably also adds a safety lock, opens transparent outer cover arbitrarily so that prevent non-maintenance or operating personnel.
Double safety switch box of the present invention is preferably and comprises that also one is subjected to the lock cell of safety lock mains switch interlock, card can be locked in casing.In other words, this safety lock mains switch is locked, and by this lock cell card is locked in casing simultaneously, and aforementioned safety lock mains switch will keep the main power source path.But, when this safety lock mains switch release, when card can be raised by casing, be connected in series with the design of main power source based on the safety lock mains switch, main power source is then opened circuit immediately, even if so the wiring that touches in the casing of maintenance personal can not get an electric shock yet.
Be subjected to the lock cell of safety lock mains switch interlock in the double safety switch box of the present invention, card is locked in casing.Further preferable design is to be provided with one in addition to fasten the unit, is a hole for example, and the safety lock mains switch comprise one can be with key turns the stopper assembly of interlock.The movable end of stopper assembly can stretch into the fastening unit in the casing, and card is locked in casing.Wherein this stopper assembly has one and can be subjected to key turns and the displacement unit that promotes, and by the displacement action of a torsion line call wire with displacement unit, conduction promotes the movable end activity of stopper assembly, stretches into to fasten in the unit, makes card not separate with casing.
Its casing side of double safety switch box of the present invention is that upper side edge or lower side are provided with at least one hole for example, passes for the power line that enters or export, control line etc.Preferable, casing is provided with at least one binding post port, and this binding post port is provided with and indicates at least one group of normalization, standardized control, the fixing connection point terminal of usefulness, special like this design can be with all outside contacts of switch-box, all adopting International standardization indicates, and mate in mode one to one, or link with winding displacement.Even in order to make the quicker and difficult generation misconnection of wiring, and standard modular fully, the casing side can further be provided with at least one winding displacement electrical connecting unit, is electrically connected for the joint of winding displacement shape control line.
Double safety switch box of the present invention has following various beneficial effect:
1. a perspective window is arranged, can come into plain view everything state and deixis.
2. safest design.When opening the card of switch-box, with the force disconnect main power source when touching power line.
3. when supply voltage misdelivery or fault, needn't open control cabinet, change fuse (FUSE) on card, walk away safety is convenient again.
4. when the motor switch of switch-box during, can on card, directly do the action (RESET) of involution test, perhaps change fuse, all needn't open card, can reduce the probability of personnel's false touch electric wire because of overload or overcurrent escape.
5. when running well, safety lock mains switch (KEYLOCK) is forced to pin control cabinet and can not be unlocked; When the safety lock mains switch switched to maintenance position, control cabinet just allowed to be unlocked, and the force disconnect main power circuit; And when switching to maintenance position, the main power switch CB (NFB.NLCB) in the dish opens or closes, the neither possibility that has the misdelivery electricity of any action.
6. the card external insulation in the switch-box is good, does not have the electrification accident and takes place.
7. main power source (MS), external sensor etc. can be connected by winding displacement, and it is easier to construct, keep in repair.
[description of drawings]
Below, further specify purpose of the present invention, technology contents, characteristics and effect thereof by preferable specific embodiment conjunction with figs..
Fig. 1 is the schematic appearance of double safety switch box of the present invention.
Fig. 2 is similar to Fig. 1, but the situation of outer card after being opened of expression casing.
Fig. 3 is the structure explanation schematic diagram that double safety switch box of the present invention is locked in card by the stopper assembly casing.
Fig. 4 is by the structure of interlock explanation schematic diagram to Fig. 3 stopper assembly.
Fig. 5 is the stopper assembly interlock explanation schematic diagram of a kind of embodiment wherein among the present invention.
The primary clustering symbol description:
10. casing 11. fastens 12. binding post ports, unit, 121. connection point terminals, 122. winding displacement sockets, 20. cards, 21. handle holes, 22. keys and puts 23. magnet, 24. handgrips, 30. motor switch, 31. circuit insurance, 32. cylinders, 33. inclined-planes, unit, unit, 40. safety lock mains switches, 41. lock cells, 42. stopper assemblies, 43. movable ends, 44. displacement units, 45. torsion line call wires, 46. wiring holes, 50. transparent outer covers, 51. safety locks, 60. keys, 70. main power sources
[embodiment]
Double safety switch box of the present invention, as extremely preferred embodiment shown in Figure 5 of Fig. 1, its mainly comprise a casing 10, one can open freely card 20 on the casing 10, be fixed on casing 10 inside motor switch 30, be fixed on the safety lock mains switch 40 on the card 20, and this safety lock mains switch 40 is connected in series with main power source.
Above-mentioned card 20 is hubbed on the casing 10 and can opens freely (as being that example then can utilize handgrip 24 that this card 20 is raised to the right with Fig. 2); And preferably, on this casing 10, can open freely (as being that example then can be raised to the left side with Fig. 2) at the transparent outer cover 50 that can also be pivoted on this card 20.Inner card 20 mainly is in order to installation safety lock mains switch 40, and each motor switch 30 of protection cabinet 10 inside can not touched arbitrarily with distribution; The other purposes of card 20 can also setting operation hole 21, so that on card 20, see through this handle hole 21, and the motor switch 30 in just can this card 20 of direct control, such as be electromagnetic switch, do the involution test action during maintenance.Can also be provided with a fuse hole further on the card 20, insurance unit, power supply road 31 is long lamp tube type fuse for example, allows its lid be exposed on the card 20 outward, conveniently changes fuse on card 20.
The aforementioned safety lock mains switch 40 that is located on the card 20 to shown in Figure 4, is the safety lock mains switch 40 that is provided with key 60 lockings as Fig. 2.In order to prevent key 60 losses, as shown in Figure 2, preferably be provided with a key on the card 20 of casing 10 and put unit 22, place for the key 60 of safety lock mains switch 40.This key is put a preferably holder of unit 22, and this key puts unit 22 and be provided with a magnet 23, in the time of so can making key 60 be seated in key to put unit 22, can firmly be held by magnet 23.
Can open transparent outer cover 50 freely on casing 10, its purposes mainly is in order to needn't opening enclosing cover, just can see that assemblies such as fuse on the card 20, motor switch 30, indicator light are normally or unusual with visual.This transparent outer cover 50 preferably also adds a safety lock 51 as shown in Figure 1, opens transparent outer cover 50 arbitrarily so that prevent non-maintenance or operating personnel.
As shown in Figure 3, double safety switch box of the present invention is preferably and comprises that also one is subjected to the lock cell 41 of safety lock mains switch 40 interlocks, card 20 can be locked in casing 10.In other words, this safety lock mains switch 40 is locked, and when by this lock cell 41 card 20 being locked in casing 10, safety lock mains switch 40 will keep the main power source path.But, when these safety lock mains switch 40 releases, when card 20 can be raised by casing 10, as shown in Figure 6, be connected in series with the design of main power source 70 based on safety lock mains switch 40, supply motor switch 30 is opened circuit immediately with 70 of the main power sources of downstream electrical machine, even if so the wiring that touch in the casing 10 of maintenance personal can not get an electric shock yet.
As shown in Figure 3 and Figure 4, be subjected to the lock cell 41 of safety lock mains switch 40 interlocks in the double safety switch box of the present invention, card 20 is locked in casing 10 further preferable designs is, other is provided with one and fastens unit 11, be a hole for example, and safety lock mains switch 40 comprise that one can rotate and the stopper assembly 42 of interlock with key 60.The movable end 43 of stopper assembly 42 can stretch into the fastening unit 11 in the casing 10, and card 20 is locked in casing 10.Wherein this stopper assembly as shown in Figure 4, having one rotated and the displacement unit 44 of promotion by key 60, and by the displacement action of a torsion line call wire 45 (as shown in Figure 3) with displacement unit 44, conduction promotes movable end 43 activities of stopper assembly 42, stretch in the fastening unit 11, make card 20 not separate with casing 10.As shown in Figure 4, when key 60 rotated, its root edge has the cylinder 32 on inclined-plane 33 will be along with rotation, and promote displacement unit 44 up and down as shown by arrows, the displacement that this displacement unit 44 produces promptly sees through torsion line call wire 45 as shown in Figure 3, is delivered to movable end 43.
Its casing 10 of double safety switch box of the present invention as shown in Figure 2, other is provided with at least one wiring hole 46, passes the back electrical ties in binding post port 12 for the power line that enters or export, control line etc.This binding post port 12 is provided with at least one group and has normalization, standardized control, the fixing connection point terminal 121 of using as shown in Figure 5, perhaps further is provided with winding displacement electrical connecting unit 122, is the winding displacement socket for example.Special like this design can be with all outside contacts of switch-box, adopting international standards signs all, and mate in mode one to one, or link with winding displacement, make the quicker and difficult generation misconnection of wiring, with complete standard modular.
The card of above-mentioned casing 20 is provided with safety lock mains switch 40 main power source of contacting, and this safety lock mains switch 40 is being controlled the interior card of this casing 20 as shown in Figure 4, and can control main power circuit and force outage.Main power source was de-energized when this safety lock mains switch 42 was unlocked, and when being unlocked, main power source opens circuit really with the interior card that guarantees casing 20.Opposite, when safety lock mains switch 42 is unlocked, be the marker location that remains on maintenance, main power source promptly is de-energized.
Though above stated specification is enumerated some preferred embodiments so that feasibility of the present invention to be described, as is well known, it is not in order to limit the present invention.Anyly be familiar with this operator, in without departing from the spirit or scope of the invention, can carry out the change and the retouching of a little equivalence, but all must belong to the rights protection scope of patent of the present invention.

Claims (10)

1, a kind of double safety switch box is characterized in that: this double safety switch box comprises: a casing, and one is hubbed on the card that can open on this casing freely; At least one motor switch that is fixed on box house; One is fixed on the safety lock mains switch on this card, and this safety lock mains switch is connected in series with main power source; This safety lock mains switch release, when this card can be raised by this casing, main power source was then opened circuit immediately.
2, double safety switch box as claimed in claim 1 is characterized in that: comprise that also one is subjected to the lock cell of described safety lock mains switch interlock, described card can be locked in this casing; This safety lock mains switch is locked, and when by this lock cell described card being locked in this casing, this safety lock mains switch is keeping the main power source path.
3, double safety switch box as claimed in claim 1 is characterized in that: the safety lock mains switch on the described card is the safety lock mains switch that is provided with key lock.
4, double safety switch box as claimed in claim 2 is characterized in that: be provided with one in the described casing and fasten the unit; And described safety lock mains switch comprise one can be with key turns the stopper assembly of interlock, make the movable end of this stopper assembly can stretch into this fastening unit, this card is locked in this casing.
5, double safety switch box as claimed in claim 1 is characterized in that: described casing is provided with at least one hole supply lines and passes.
6, double safety switch box as claimed in claim 1 is characterized in that: described casing is provided with at least one binding post port, and this binding post port setting and sign have normalized control, the fixing connection point terminal of usefulness.
7, double safety switch box as claimed in claim 1 is characterized in that: described casing is provided with at least one winding displacement electrical connecting unit.
8, double safety switch box as claimed in claim 1 is characterized in that: the card of described casing is provided with a fuse hole, and insurance unit, power supply road exposes.
9, double safety switch box as claimed in claim 1 is characterized in that: described card is provided with at least one handle hole, and the electromagnetic switch that can see through in this this card of handle hole direct control on card is done the involution test action.
10, double safety switch box as claimed in claim 4, it is characterized in that: described lock cell also has a displacement unit that is promoted can be subjected to key turns by this safety lock mains switch the time, and the displacement action of a torsion line call wire with this displacement unit arranged, and conduction promotes the movable end of described stopper assembly and activity.
CN200810222664A 2008-09-22 2008-09-22 Double safety switch box Pending CN101685944A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN200810222664A CN101685944A (en) 2008-09-22 2008-09-22 Double safety switch box

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN200810222664A CN101685944A (en) 2008-09-22 2008-09-22 Double safety switch box

Publications (1)

Publication Number Publication Date
CN101685944A true CN101685944A (en) 2010-03-31

Family

ID=42048969

Family Applications (1)

Application Number Title Priority Date Filing Date
CN200810222664A Pending CN101685944A (en) 2008-09-22 2008-09-22 Double safety switch box

Country Status (1)

Country Link
CN (1) CN101685944A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103001124A (en) * 2011-09-16 2013-03-27 武陟县电业总公司 Safety maintenance system for high-voltage switches
CN103366985A (en) * 2013-07-03 2013-10-23 天津市既济电气控制设备有限公司 Mobile power switch special for maintenance and debugging
CN105201329A (en) * 2015-10-10 2015-12-30 佛山市大吉大利电子商务有限公司 Antitheft safe box capable of perishing thought of stealing
CN105201328A (en) * 2015-10-10 2015-12-30 佛山市大吉大利电子商务有限公司 Antitheft method capable of perishing thought of stealing valuables inside cashbox
CN105864917A (en) * 2016-03-31 2016-08-17 青岛海尔空调器有限总公司 Outdoor unit of split type air conditioner
CN108287259A (en) * 2017-12-19 2018-07-17 重庆南米电子商务有限公司 Electronic product protects structure
CN108287258A (en) * 2017-12-19 2018-07-17 重庆南米电子商务有限公司 A kind of electronic product guard method
CN113300224A (en) * 2021-05-28 2021-08-24 青岛大志美德电气有限公司 Multifunctional low-voltage comprehensive distribution box capable of switching output capacity and automatically locking

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103001124A (en) * 2011-09-16 2013-03-27 武陟县电业总公司 Safety maintenance system for high-voltage switches
CN103366985A (en) * 2013-07-03 2013-10-23 天津市既济电气控制设备有限公司 Mobile power switch special for maintenance and debugging
CN105201329A (en) * 2015-10-10 2015-12-30 佛山市大吉大利电子商务有限公司 Antitheft safe box capable of perishing thought of stealing
CN105201328A (en) * 2015-10-10 2015-12-30 佛山市大吉大利电子商务有限公司 Antitheft method capable of perishing thought of stealing valuables inside cashbox
CN105864917A (en) * 2016-03-31 2016-08-17 青岛海尔空调器有限总公司 Outdoor unit of split type air conditioner
CN108287259A (en) * 2017-12-19 2018-07-17 重庆南米电子商务有限公司 Electronic product protects structure
CN108287258A (en) * 2017-12-19 2018-07-17 重庆南米电子商务有限公司 A kind of electronic product guard method
CN108287259B (en) * 2017-12-19 2020-03-06 重庆南米电子商务有限公司 Electronic product protection structure
CN108287258B (en) * 2017-12-19 2020-03-17 重庆南米电子商务有限公司 Electronic product protection method
CN113300224A (en) * 2021-05-28 2021-08-24 青岛大志美德电气有限公司 Multifunctional low-voltage comprehensive distribution box capable of switching output capacity and automatically locking

Similar Documents

Publication Publication Date Title
CN101685944A (en) Double safety switch box
CN205544619U (en) Portable cubical switchboard divide -shut brake remote control unit
CN202976273U (en) Locking device for misoperation prevention of power system
CN108538673A (en) A kind of earthing switch closes point instruction and a blocking device
CN209133925U (en) A kind of novel lighting distribution box
CN203103780U (en) Grounding wire anti-misoperation circuit and grounding wire anti-misoperation device
CN201022068Y (en) Device for blocking electrical connection between power supply input and output end
CN206602051U (en) A kind of breaker operator hanging locking device
CN201466492U (en) Electrical anti-maloperation locking device for ground stud tip
CN210183003U (en) Remote intelligent control security monitoring box
CN209805411U (en) Short circuit prevention operating system of isolating switch
CN109066315B (en) Binding post protection device and direct current distribution panel
CN208522253U (en) A kind of connecting terminal protective device and DC distributor
CN204390957U (en) Switch operation hole radical occlusion device
CN106783283A (en) A kind of communication assembling cabinet based on communication security
CN211655545U (en) Drawer function locking device
CN201054471Y (en) A secure distribution enclosure box
CN213303878U (en) Dry-type transformer structure with molded case circuit breaker
CN211480671U (en) Low-voltage GCK type power distribution cabinet
CN203367777U (en) Anti-short-circuit system used for microcomputer five-protection electric lock
CN211700160U (en) Low-voltage intelligent circuit breaker
CN211908082U (en) Explosion-proof distribution box
CN208904767U (en) A kind of power distribution network intelligent comprehensive anti-error locking system
CN102969659B (en) Earth connection anti-misoperation apparatus
CN219017517U (en) Rotary isolating switch knob and rotary isolating switch

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20100331

WD01 Invention patent application deemed withdrawn after publication