CN111755287A - Circuit breaker device with fault recording performance - Google Patents
Circuit breaker device with fault recording performance Download PDFInfo
- Publication number
- CN111755287A CN111755287A CN202010654729.6A CN202010654729A CN111755287A CN 111755287 A CN111755287 A CN 111755287A CN 202010654729 A CN202010654729 A CN 202010654729A CN 111755287 A CN111755287 A CN 111755287A
- Authority
- CN
- China
- Prior art keywords
- double
- circuit breaker
- shell
- fault recording
- layer
- 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
Links
- 230000009467 reduction Effects 0.000 claims description 24
- 230000007246 mechanism Effects 0.000 claims description 12
- 230000007547 defect Effects 0.000 abstract description 4
- 230000008859 change Effects 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 238000003745 diagnosis Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000005428 wave function Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/02—Housings; Casings; Bases; Mountings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/02—Housings; Casings; Bases; Mountings
- H01H71/0207—Mounting or assembling the different parts of the circuit breaker
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/1054—Means for avoiding unauthorised release
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/66—Power reset mechanisms
- H01H71/70—Power reset mechanisms actuated by electric motor
Landscapes
- Engineering & Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Breakers (AREA)
Abstract
A circuit breaker device with fault recording performance comprises a second shell, a third shell, a circuit breaker main body and a double-layer current collector; the second shell and the third shell are buckled to form a first hollow shell, and the circuit breaker main body and a double-layer current collector beside the circuit breaker main body are arranged in the space in the first hollow shell; the double-layer current collector is used for carrying out fault recording on the breaker main body. The defect that the breaker does not have the fault recording function in the prior art is effectively overcome by combining other structures.
Description
Technical Field
The invention belongs to the technical field of circuit breakers, and particularly relates to a circuit breaker device with fault recording performance.
Background
A low-voltage circuit breaker (once called an automatic switch) is a switching device which can not only connect and disconnect normal load current and overload current, but also connect and disconnect short-circuit current. The low-voltage circuit breaker has certain protection functions such as overload, short circuit, leakage protection and the like besides the function of starting control in the circuit. It can be used to distribute electric energy, protect power supply circuit and motor, and can automatically cut off circuit when they have serious overload or short circuit and under-voltage faults, and its function is equivalent to the combination of fuse switch and over-and under-heat relay. Moreover, after the fault current is cut off, parts do not need to be changed generally, and the method is widely applied.
In recent years, more and more circuit breakers with an electric energy metering function and circuit breakers with a remote control function appear to replace the traditional circuit breakers, and although the functions are more and more, the reliability is reduced. With the increasing expansion of the scale of power grids, an intelligent circuit breaker with complete functions of fault diagnosis, post-accident data analysis, protection and the like is urgently needed, and the intelligent circuit breaker plays an important role in safe and reliable operation of a power system.
And the fault recording is a scheduling end network fault diagnosis system based on fault recording information. The fault recorder is used for a power system, can automatically and accurately record the change conditions of various electrical quantities in the processes before and after a fault when the system has the fault, and has important functions of analyzing and comparing the electrical quantities, analyzing and processing the fault, judging whether protection acts correctly or not and improving the safe operation level of the power system.
At present, the circuit breaker does not have a fault recording function.
Disclosure of Invention
In order to solve the problems, the invention provides a circuit breaker device with a fault recording function, which effectively overcomes the defect that the circuit breakers in the prior art do not have the fault recording function.
In order to overcome the defects in the prior art, the invention provides a solution for a circuit breaker device with a fault recording performance, which comprises the following specific steps:
a breaker device with fault recording performance comprises a second shell 4, a third shell 7, a breaker main body 5 and a double-layer current collector 6;
the second shell 4 and the third shell 7 are buckled to form a first hollow shell, and the circuit breaker main body 5 and a double-layer current collector 6 beside the circuit breaker main body 5 are arranged in the space in the first hollow shell;
the double-layer current collector 6 is used for carrying out fault recording on the breaker main body 5.
Further, the double-layer current collector 6 comprises a current transformer 6-1 and a Rogowski coil 6-2, wherein the current transformer 6-1 and the Rogowski coil 6-2 with the same diameter as the current transformer are stacked together and wrapped by an insulating skin.
Further, the Rogowski coil 6-2 is a rigid Rogowski coil.
Further, the circuit breaker device with the fault recording performance further comprises a first shell 1, an electric operating mechanism 3 and a circuit board 2;
the first shell 1 and the second shell 4 are buckled to form a second hollow shell;
the circuit board 2 and the electric operating mechanism 3 are arranged in the space in the hollow shell II.
Further, the electric operating mechanism 3 comprises a micro motor 3-1, a cross worm 3-2, a double-layer reduction gear I3-3, a double-layer reduction gear II 3-4, a double-layer reduction gear III 3-5, a special-shaped protruding gear 3-6, a handle linkage push rod 3-7 and a tripping lever 3-8;
the cross worm 3-2 is sleeved at the output end of the micro motor 3-1;
the belt cross worm 3-2, the double-layer reduction gear I3-3, the double-layer reduction gear II 3-4, the double-layer reduction gear III 3-5 and the special-shaped gear with the bulge are sequentially meshed;
the special-shaped gear with the bulge 3-6 is sleeved on the handle linkage push rod 3-7;
furthermore, the breaker main body 5 comprises an incoming wiring terminal 5-1, an arc extinguish chamber 5-2, a short circuit release 5-3, a double-metal adjusting screw 5-4, a contact 5-5, a bimetallic strip 5-6, a handle 5-7, a state indicating frame 5-8 and an outgoing wiring terminal 5-9.
Further, the double-layer current collector 6 and the micro motor are both connected to the circuit board 2.
When the power utilization network is normal, the circuit breaker carries out electric energy metering through high accuracy current transformer, in case the power utilization network appears unusually, if the short circuit appears, transship, high pressure scheduling problem, the circuit breaker can gather the problem current waveform through the rogowski coil and carry out the record, based on the characteristics that the rogowski coil is unsaturated forever, even there is very high fault current, the rogowski coil still can be complete gather the fault current out, guarantees the reliability of record wave function.
The invention has the beneficial effects that:
the invention not only has the short circuit and overload protection function of the traditional circuit breaker, but also can automatically and accurately record the change conditions of various electrical quantities in the processes before and after the fault when the system has the fault, thereby being beneficial to analyzing and comparing the change conditions of the electrical quantities, analyzing and processing accidents, judging whether the protection acts correctly and improving the safe operation level of the power system. The current detection mode of the invention adopts a scheme of a high-precision current transformer and a Rogowski coil, wherein the high-precision current transformer is used for measuring electric energy, and the current is 2 times of the rated current to the maximum; the Rogowski coil is used for fault recording and protection, and the maximum current can be 10 times of the rated current; therefore, the accuracy of electric energy metering is ensured, and the complete waveform of the fault can be recorded when the fault occurs.
Drawings
Fig. 1 is a component diagram of a circuit breaker apparatus having fault recording capability of the present invention.
Fig. 2 is a structural view of the electric operating mechanism of the present invention.
Fig. 3 is a structural view of the breaker main body of the present invention.
Fig. 4 is a schematic structural diagram of the double-layer current collector of the present invention.
Fig. 5 is a structural view of the Phillips worm of the present invention.
Fig. 6 is a structural view of a profile toothed lobe according to the present invention.
FIG. 7 is a front schematic view of the handle-linked pusher of the present invention.
FIG. 8 is a reverse side schematic view of the handle-linked pusher of the present invention.
Fig. 9 is a structural view of the trip lever of the present invention.
Fig. 10 is a structural view of the double-gold adjusting screw of the present invention.
Detailed Description
The invention will be further described with reference to the following figures and examples.
As shown in fig. 1 to 4, the circuit breaker apparatus with fault recording capability includes a second housing 4, a third housing 7, a circuit breaker main body 5, and a double-layer current collector 6;
the second shell 4 and the third shell 7 are buckled to form a first hollow shell, and the circuit breaker main body 5 and a double-layer current collector 6 beside the circuit breaker main body 5 are arranged in the space in the first hollow shell; the breaker main body 5 is fixedly connected in the space in the first hollow shell in a threaded connection mode. The double-layer current collector 6 is used for carrying out fault recording on the breaker main body 5. The second casing 4 and the third casing 7 may be fastened together by screwing bolts. Double-deck current collector 6 is used for right circuit breaker main part 5 carries out the trouble record ripples, has effectively avoided the defect that the circuit breaker all does not possess the trouble record ripples function among the prior art. The double-layer current collector 6 is a novel current collector and comprises a high-precision current transformer 6-1 and a Rogowski coil 6-2, wherein the high-precision current transformer 6-1 and the Rogowski coil 6-2 with the same diameter as the high-precision current transformer are stacked together and wrapped by an insulating skin. The high-precision current transformer can realize 0.5S-level electric energy metering, and the accuracy of the electric energy metering is ensured at high precision; the rogowski coil is a hollow annular coil, has two types of flexibility and rigidity, and can be directly sleeved on a conductor of a measured circuit breaker body 5 to measure alternating current. The Rogowski coil 6-2 adopts a rigid Rogowski coil. The rigid Rogowski coil adopts a circuit board drawing mode, is suitable for measuring alternating current in a wider frequency range, has no special requirements on conductors and sizes, has quicker instant response capability, and is particularly suitable for occasions needing wide-frequency and large-current measurement similar to the fault recording function of the invention. The circuit breaker device with the fault recording performance further comprises a first shell 1, an electric operating mechanism 3 and a circuit board 2; the first shell 1 and the second shell 4 are buckled to form a second hollow shell; the circuit board 2 and the electric operating mechanism 3 are arranged in the space in the hollow shell II. The circuit board 2 can be a single chip microcomputer. The Rogowski coil is a hollow annular coil and comprises a coil and a framework, the framework is flexible and rigid, the flexible framework is called as a flexible Rogowski coil, the rigid framework is called as a rigid Rogowski coil, a drawing circuit board belongs to rigid materials, and the Rogowski coil is manufactured in a drawing circuit board mode, namely a lead is drawn on the circuit board according to a certain rule.
The electric operating mechanism 3 comprises a micro motor 3-1, a cross worm 3-2, a double-layer reduction gear I3-3, a double-layer reduction gear II 3-4, a double-layer reduction gear III 3-5, a special-shaped protruding gear 3-6, a handle linkage push rod 3-7 and a tripping lever 3-8; the cross worm 3-2 is sleeved at the output end of the micro motor 3-1; the belt cross worm 3-2, the double-layer reduction gear I3-3, the double-layer reduction gear II 3-4, the double-layer reduction gear III 3-5 and the special-shaped gear with the bulge are sequentially meshed; the special-shaped gear with the bulge 3-6 is sleeved on the handle linkage push rod 3-7.
The working principle of the electric operating mechanism is as follows: the electric operating mechanism is driven by a micro motor 3-1, the micro motor 3-1 drives a cross worm 3-2 to rotate, the cross worm 3-2 drives a double-layer reduction gear I3-3 to rotate, the double-layer reduction gear I3-3 drives a double-layer reduction gear II 3-4 to rotate, the double-layer reduction gear II 3-4 drives a double-layer reduction gear III 3-5 to rotate, the double-layer reduction gear III 3-5 drives a special-shaped convex gear 3-6 to rotate, the special-shaped convex gear 3-6 pushes a handle to link with a push rod 3-7 to push the handle to rotate clockwise to realize electric switching-on operation, or the special-shaped convex gear 3-6 pushes the handle to link with the push rod 3-7 to push a tripping lever 3-8 to realize electric switching-off operation.
The cross worm is arranged on the micro motor 3-1 and can synchronously rotate forwards and backwards along with the micro motor 3-1 as shown in figure 5. The lower figure is a cross-worm with structure not mounted on the micro-motor 3-1.
As shown in fig. 6, the protruding part of the protruding gear 3-6 can be used to push the handle to rotate in conjunction with the push rod 3-7, so as to drive the handle to close the switch, and the protruding part of the protruding gear 3-6 can be used to push the trip lever 3-8 to trigger the switch. The lower drawing shows the structure of the special-shaped gear when the special-shaped gear is not installed.
The handle linkage push rod is synchronous with the action of the handle as shown in figures 7 and 8, the handle linkage push rod rotates clockwise, the handle also rotates clockwise, the handle linkage push rod rotates anticlockwise, and the handle also rotates anticlockwise. The lower drawing shows the structure of the handle linked push rod when not installed.
The tripping lever is shown in fig. 9, the counterclockwise rotation of the convex part in the special-shaped gear 3-6 with the convex is used for pushing the tripping lever 3-8 to trigger the brake opening. Fig. 9 is a structure of the uninstalled trip levers 3 to 8.
The connection relation of all parts of the disconnecting breaker main body 5 is shown in fig. 3, an incoming wiring terminal 5-1, a short-circuit release 5-3, a contact 5-5, a bimetallic strip 5-6 and an outgoing wiring terminal 5-9 are sequentially connected in series, and a connecting line between the bimetallic strip 5-6 and the outgoing wiring terminal 5-9 needs to penetrate through the double-layer current collector 6. The handles 5-7 can control the on/off of the contact, and the state indicating frame indicates the on/off state of the contact.
The double-metal adjusting screw is shown in fig. 10, and has the function of adjusting the angle and the bending degree of the bimetallic strip 5-6. The structure is shown in fig. 10.
The breaker main body 5 comprises an incoming wiring terminal 5-1, an arc extinguish chamber 5-2, a short circuit release 5-3, a double-metal adjusting screw 5-4, a contact 5-5, a bimetallic strip 5-6, a handle 5-7, a state indicating frame 5-8 and an outgoing wiring terminal 5-9. The double-layer current collector 6 and the micro motor are both connected to the circuit board 2. Therefore, the double-layer current collector 6 can transmit collected signals to the circuit board 2, and in addition, the circuit board 2 can also operate the micro motor to operate.
When the power utilization network is normal, the circuit breaker carries out electric energy metering through high accuracy current transformer, in case the power utilization network appears unusually, if the short circuit appears, transship, high pressure scheduling problem, the circuit breaker can gather the problem current waveform through the rogowski coil and carry out the record, based on the characteristics that the rogowski coil is unsaturated forever, even there is very high fault current, the rogowski coil still can be complete gather the fault current out, guarantees the reliability of record wave function.
The present invention has been described in an illustrative manner by the embodiments, and it should be understood by those skilled in the art that the present disclosure is not limited to the embodiments described above, but is capable of various changes, modifications and substitutions without departing from the scope of the present invention.
Claims (7)
1. A circuit breaker device with fault recording performance is characterized by comprising a second shell, a third shell, a circuit breaker main body and a double-layer current collector;
the second shell and the third shell are buckled to form a first hollow shell, and the circuit breaker main body and a double-layer current collector beside the circuit breaker main body are arranged in the space in the first hollow shell;
the double-layer current collector is used for carrying out fault recording on the breaker main body.
2. The circuit breaker apparatus with fault recording capability of claim 1, wherein said double-layer current collector comprises a current transformer and a rogowski coil, said current transformer and the rogowski coil having the same diameter as the current transformer are stacked together and wrapped with an insulating sheath.
3. The circuit breaker apparatus with fault recording capability according to claim 2, wherein the rogowski coil is a hard rogowski coil.
4. The circuit breaker apparatus with fault recording capability of claim 1, further comprising a first housing, an electrically operated mechanism and a circuit board;
the first shell and the second shell are buckled to form a second hollow shell;
and the circuit board and the electric operating mechanism are arranged in the space in the hollow shell II.
5. The circuit breaker apparatus with fault recording capability of claim 4, wherein the electric operating mechanism comprises a micro motor, a cross worm, a first double-layer reduction gear, a second double-layer reduction gear, a third double-layer reduction gear, a special-shaped protruding gear, a handle linkage push rod and a trip lever;
the cross worm is sleeved at the output end of the micro motor;
the belt cross worm, the double-layer reduction gear I, the double-layer reduction gear II, the double-layer reduction gear III and the special-shaped gear with the bulge are sequentially meshed;
the special-shaped belt convex gear is sleeved on the handle linkage push rod.
6. The circuit breaker apparatus with fault recording capability of claim 4, wherein the circuit breaker body comprises an incoming terminal, an arc extinguishing chamber, a short circuit release, a bimetal adjusting screw, a contact, a bimetal, a handle, a status indication frame and an outgoing terminal.
7. The circuit breaker apparatus with fault recording capability of claim 4, wherein the double layer current collector and the micro motor are both connected to the circuit board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010654729.6A CN111755287A (en) | 2020-07-09 | 2020-07-09 | Circuit breaker device with fault recording performance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010654729.6A CN111755287A (en) | 2020-07-09 | 2020-07-09 | Circuit breaker device with fault recording performance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111755287A true CN111755287A (en) | 2020-10-09 |
Family
ID=72710147
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010654729.6A Pending CN111755287A (en) | 2020-07-09 | 2020-07-09 | Circuit breaker device with fault recording performance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111755287A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2636250Y (en) * | 2003-04-16 | 2004-08-25 | 大连理工大学 | Rogowski coil current sensor for printed circuit board |
| CN102590587A (en) * | 2012-02-22 | 2012-07-18 | 西安交通大学 | Device and method for identifying short-circuit current of medium-voltage high-current direct current circuit breaker |
| JP2013246994A (en) * | 2012-05-28 | 2013-12-09 | Tempearl Ind Co Ltd | Circuit breaker |
| CN204595145U (en) * | 2015-04-30 | 2015-08-26 | 贵阳供电局 | Feeder line operation troubles on-line monitoring system is pressed to record ripple collector in one |
| CN204857603U (en) * | 2015-08-05 | 2015-12-09 | 南京捷泰电力设备有限公司 | Low -voltage moulded case circuit breaker with trouble record wave energy |
| CN207096374U (en) * | 2017-07-13 | 2018-03-13 | 长沙恒电聚能电子科技有限公司 | Recording type fault detector induction energy fetching sample unit |
| CN208985937U (en) * | 2018-11-26 | 2019-06-14 | 深圳时空科技集团有限公司 | A kind of switch-dividing of intelligent distribution box |
| CN210722905U (en) * | 2019-07-31 | 2020-06-09 | 天津京人电器有限公司 | Three-phase four-wire molded case circuit breaker |
-
2020
- 2020-07-09 CN CN202010654729.6A patent/CN111755287A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2636250Y (en) * | 2003-04-16 | 2004-08-25 | 大连理工大学 | Rogowski coil current sensor for printed circuit board |
| CN102590587A (en) * | 2012-02-22 | 2012-07-18 | 西安交通大学 | Device and method for identifying short-circuit current of medium-voltage high-current direct current circuit breaker |
| JP2013246994A (en) * | 2012-05-28 | 2013-12-09 | Tempearl Ind Co Ltd | Circuit breaker |
| CN204595145U (en) * | 2015-04-30 | 2015-08-26 | 贵阳供电局 | Feeder line operation troubles on-line monitoring system is pressed to record ripple collector in one |
| CN204857603U (en) * | 2015-08-05 | 2015-12-09 | 南京捷泰电力设备有限公司 | Low -voltage moulded case circuit breaker with trouble record wave energy |
| CN207096374U (en) * | 2017-07-13 | 2018-03-13 | 长沙恒电聚能电子科技有限公司 | Recording type fault detector induction energy fetching sample unit |
| CN208985937U (en) * | 2018-11-26 | 2019-06-14 | 深圳时空科技集团有限公司 | A kind of switch-dividing of intelligent distribution box |
| CN210722905U (en) * | 2019-07-31 | 2020-06-09 | 天津京人电器有限公司 | Three-phase four-wire molded case circuit breaker |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102136400B (en) | Circuit breaker having trip cause indicating mechanism | |
| CN101114557A (en) | Safety circuit breaker | |
| CN112539930B (en) | GIS/GCB circuit breaker three-phase opening and closing state monitoring device and using method | |
| CN103941180A (en) | High-voltage line breaker condition monitoring system | |
| CN201274253Y (en) | Indoor combined electric appliance for 40.5 kV vacuum load switch fuse | |
| CN111755287A (en) | Circuit breaker device with fault recording performance | |
| CN201725755U (en) | Molded case circuit breaker with residual current protection | |
| CN107086667B (en) | Switching-on loop structure of outlet circuit breaker and working method thereof | |
| CN201181682Y (en) | Multifunctional small circuit breaker | |
| CN217216075U (en) | Photovoltaic tandem protection system | |
| CN213986833U (en) | GIS/GCB circuit breaker three-phase on-off state monitoring device | |
| EP1146645A1 (en) | A contactless intellectual switch | |
| CN115411836A (en) | Power supply device and electric energy meter box | |
| CN210182309U (en) | Moulded case circuit breaker voltage sampling structure | |
| CN209929160U (en) | Reliable tripping device of 10KV switch equipment | |
| CN220710218U (en) | Electronic residual current molded case circuit breaker | |
| CN217655830U (en) | Under-voltage release for auxiliary signal output | |
| CN216902598U (en) | Three-phase mechanical linkage isolating switch's divide-shut brake monitoring system | |
| CN218728751U (en) | Automatic temperature control heating device of circuit breaker hydraulic mechanism | |
| CN219936965U (en) | Leakage circuit breaker | |
| CN221125853U (en) | Multi-protection intelligent circuit breaker | |
| CN103456573A (en) | Breaker and power distribution protection and control method thereof | |
| CN219778793U (en) | Electronic molded case circuit breaker | |
| CN211957569U (en) | Novel intelligent miniature circuit breaker | |
| CN218274487U (en) | Metering type small-sized automatic reclosing circuit breaker |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20201009 |
|
| RJ01 | Rejection of invention patent application after publication |