CN116884817A - Transmission device, undervoltage release and circuit breaker - Google Patents
Transmission device, undervoltage release and circuit breaker Download PDFInfo
- Publication number
- CN116884817A CN116884817A CN202311153975.3A CN202311153975A CN116884817A CN 116884817 A CN116884817 A CN 116884817A CN 202311153975 A CN202311153975 A CN 202311153975A CN 116884817 A CN116884817 A CN 116884817A
- Authority
- CN
- China
- Prior art keywords
- movable
- under
- transmission
- voltage
- block
- 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.)
- Granted
Links
- 230000005540 biological transmission Effects 0.000 title claims abstract description 73
- 230000006835 compression Effects 0.000 claims abstract description 36
- 238000007906 compression Methods 0.000 claims abstract description 36
- 230000009471 action Effects 0.000 claims description 10
- 238000009434 installation Methods 0.000 claims description 9
- 230000004913 activation Effects 0.000 claims description 3
- 230000003213 activating effect Effects 0.000 claims 1
- 230000006870 function Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000009826 distribution Methods 0.000 description 4
- 230000009347 mechanical transmission Effects 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- VAYOSLLFUXYJDT-RDTXWAMCSA-N Lysergic acid diethylamide Chemical class C1=CC(C=2[C@H](N(C)C[C@@H](C=2)C(=O)N(CC)CC)C2)=C3C2=CNC3=C1 VAYOSLLFUXYJDT-RDTXWAMCSA-N 0.000 description 2
- 238000005760 Tripper reaction Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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
- H01H71/10—Operating or release mechanisms
- H01H71/50—Manual reset mechanisms which may be also used for manual 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
- H01H71/12—Automatic release mechanisms with or without manual release
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
- H01H83/12—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by voltage falling below a predetermined value, e.g. for no-volt protection
Abstract
The application relates to a transmission device, an undervoltage release and a circuit breaker. The transmission device comprises: a bracket having a plate body and first and second side walls extending from the plate body; one end of the movable ejector rod is provided with a stop block, and the other end of the movable ejector rod passes through the first side wall and is arranged between the first side wall and the second side wall; the compression spring is sleeved on the movable ejector rod and is arranged between the stop block and the first side wall, one end of the control cable penetrates through the second side wall and is fixed with the other end of the movable ejector rod, and the control operation part drives the control cable to move the movable ejector rod, wherein the transmission device is arranged on the under-voltage release through the support, the stop block of the movable ejector rod can move between a first position and a second position, the stop block of the movable ejector rod stops the movable trigger rod to move and the compression spring is released, and the stop block of the movable ejector rod allows the movable trigger rod to move and the compression spring is compressed.
Description
Technical Field
The application relates to a transmission device, in particular to a transmission device of an undervoltage release of a circuit breaker, the undervoltage release and the circuit breaker.
Background
With the rapid development of economy and society, the reliability requirements of users on the power grid are higher and higher. The under-voltage release is used as a device for protecting the power grid under the condition of under-voltage or voltage loss, and is characterized in that when the power grid is under-voltage (35% -70% of rated voltage) or voltage loss, the under-voltage release acts to trip a circuit breaker, and a power supply is disconnected to protect power equipment. However, there are two problems associated with low voltage circuit breakers having an under voltage (step-down) trip function in use: firstly, because of the instantaneous fluctuation, flickering and outage of a power grid, a low-voltage circuit breaker trips, a user suddenly cuts off the power, and the user is not satisfied; and secondly, the manual switching-on workload is large and the speed is low when the power supply enterprises recover the power supply.
Currently, under-voltage trippers are locked (i.e., disabled) in most cases, and under-voltage protection is abandoned, thereby avoiding cumbersome power delivery. The quality of the distribution network voltage is high, and once low voltage occurs, some household appliances and medical equipment using an alternating current motor can be damaged; and then a vicious circle that the reactive power of the power grid is increased and the voltage is further reduced is formed again, and finally the power distribution network system is crashed. Therefore, the behavior is not preferable, and can bring invisible threat to national economy production.
Disclosure of Invention
The embodiment of the application provides a manual operation mechanical transmission device, which is arranged on a traditional under-voltage release, so that under-voltage and under-voltage can be distinguished through the under-voltage release, namely, when the under-voltage release is under-voltage, the under-voltage release keeps a locking state (namely, a failure state), and when the under-voltage release is purely under-voltage, the manual operation releases the locking, and the under-voltage release can work normally. In addition, the improved undervoltage release can also realize the functions that the undervoltage release is placed in a locking state and then the mechanical blocking block is withdrawn when power is transmitted.
According to an aspect of an embodiment of the present application, there is provided a transmission for controlling an activation action of an under-voltage trip, the under-voltage trip including a main body and a movable trigger lever provided at the main body and protruding outward from the main body, the movable trigger lever being configured to be movable toward the main body to activate the under-voltage trip, the transmission comprising: the support is provided with a plate body, a first side wall and a second side wall, wherein the first side wall and the second side wall extend from the plate body, and the plate body, the first side wall and the second side wall form a U shape; a transmission body comprising: the movable ejector rod is provided with a stop block at one end, the other end of the movable ejector rod penetrates through the first side wall and is arranged between the first side wall and the second side wall, and the compression spring is sleeved on the movable ejector rod and is arranged between the stop block and the first side wall; one end of the control cable passes through the second side wall and is fixed with the other end of the movable ejector rod; and a control operation part operable to drive the control cable to move the movable ejector rod, wherein the other end of the control cable is fixed with the control operation part, wherein the transmission device main body is mounted on the under-voltage release through the bracket, and a stop block of the movable ejector rod is movable between a first position, in which the stop block of the movable ejector rod blocks the movable trigger rod from moving toward the main body, and a second position, in which the stop block of the movable ejector rod allows the movable trigger rod to move toward the main body, wherein in the first position, the compression spring is released and in the second position, the compression spring is compressed.
In this way, when the line voltage is normal, the under-voltage release is electrified, the under-voltage release generates enough suction force, the action of the compression spring for triggering can be overcome, so that the movable trigger rod is in a failure position, the stop block of the movable ejector rod can prevent the movable trigger rod from moving to the main body, the under-voltage release is in a failure state, and the circuit breaker can normally close and break. When an under-voltage event occurs, for example, the voltage on the circuit is completely disappeared or the voltage is reduced to 70-35% of the rated voltage, the suction force of the under-voltage release is disappeared, the stop block can be separated by operating the control operation part, so that the movable trigger rod is released, the movable trigger rod can trigger the pawl of the spring operation mechanism in the circuit breaker, the circuit breaker finishes breaking action, the circuit breaker is disconnected, the power supply is cut off, and a load electric appliance or electric equipment below the circuit breaker is prevented from being damaged by the under-voltage.
According to an exemplary embodiment of the present application, the transmission body further includes: the sleeve is sleeved on the movable ejector rod, the compression spring is sleeved on the sleeve, the length of the sleeve is shorter than that of the movable ejector rod to limit the maximum travel of the stop block, and one end of the sleeve is provided with a flange which is fixedly arranged on the first side wall.
In this way, the distance that the stopper moves can be limited, so that the operational convenience of the transmission can be provided.
According to an exemplary embodiment of the application, the transmission further comprises: the travel switch comprises a first part and a second part, wherein the first part is arranged on a plate body of the bracket, the second part is fixed on a movable ejector rod between the first side wall and the second side wall, the first part is provided with an indicating part, and the second part indicates that a stop block of the movable ejector rod is at a first position or a second position through the indicating part.
In this manner, it can be determined whether the under-voltage trip is in an under-voltage operating state or a loss-of-voltage operating state, as described above, upon loss of voltage, the under-voltage trip remains latched (i.e., disabled, with the stopper in the first position), while manual operation under pure under-voltage unlatches, with the under-voltage trip being able to function normally (i.e., with the stopper in the second position).
According to an exemplary embodiment of the present application, the first sidewall has a first mounting hole, the second sidewall has a second mounting hole opposite to the first mounting hole, and the movable push rod passes through the first mounting hole and is positioned in the first mounting hole, and one end of the control cable passes through the second mounting hole to fix one end of the control cable with the other end of the movable push rod.
In this way, the transmission body can be mounted on the under-voltage release with a simple bracket architecture.
According to an exemplary embodiment of the present application, a control operation section includes: an operation part which is provided with a transmission rod and two handles forming a T shape with the transmission rod; the first installation part is U-shaped, the U-shaped is provided with an opening end, a bottom end opposite to the opening end and a concave part between the opening end and the bottom end, the bottom end of the first installation part is provided with an opening for the other end of the control cable to pass through so that the other end of the control cable and the transmission rod are fixed together in the concave part of the first installation part, and the U-shaped side surface of the first installation part is provided with a lug part extending outwards; the second mounting part is provided with a sliding groove, two long strip openings which are parallel to the sliding groove and are opposite to each other, and a flat plate part which is arranged at the end side of the sliding groove and is opposite to the lug part, wherein the flat plate part is provided with an opening communicated with the sliding groove for a transmission rod to pass through, the transmission rod is arranged in the sliding groove in a manner of extending along the sliding groove so as to be capable of sliding in the sliding groove, and the two handles slide along the two long strip openings, and the lug part of the first mounting part and the flat plate part of the second mounting part are fixed together.
In this way, a stable and easy-to-operate control operation portion can be formed, for example, two handles are held by hand to be pulled to bring the control cable to move the movable jack, thereby moving the stopper to release the movable trigger lever.
According to an exemplary embodiment of the application, the transmission further comprises: the first cable assembly part, the control cable wears to locate in the first cable assembly part and first cable assembly part is fixed in the second mounting hole, the second cable assembly part, the control cable wears to locate in the second cable assembly part and the second cable assembly part is fixed in the trompil of bottom, first fixed block, one side of first fixed block has first fixed orifices, the one end of control cable is fixed in the first fixed orifices of first fixed block, the opposite side of first fixed block has first mounting groove, the other end of movable ejector pin is installed in first mounting groove, and the second fixed block, one side of second fixed block has the second fixed orifices, the other end of control cable is installed in the second fixed orifices of second fixed block, the opposite side of second fixed block has the second mounting groove, the tip of transfer line is installed in the second mounting groove.
In this way, the control cable can be firmly fixed between the movable jack and the transmission rod, so that the movable jack can be stably pulled to move.
According to an exemplary embodiment of the present application, the second mounting part further has a stopper provided at a side of the sliding groove remote from the flat plate part, the stopper limiting a maximum stroke of the driving lever moving away from the flat plate part.
In this way, it is possible to limit the moving distance of the movable jack and provide the operational convenience of the control operation portion.
According to another exemplary embodiment of the present application, an under-voltage release is provided, including the above-mentioned transmission device.
According to another exemplary embodiment of the present application, the under-voltage release further includes: and a movable block in which an extended end portion of the movable trigger lever is fixed, and which is movable as the movable trigger lever moves, wherein in a first position, a stopper block is provided in a space between the main body and the movable block to block movement of the movable trigger lever toward the main body, and in a second position, the stopper block is away from the space between the main body and the movable block to allow movement of the movable trigger lever toward the main body.
According to another exemplary embodiment of the present application, the movable trigger lever is sheathed with a trigger compression spring, wherein in a first position the trigger compression spring is compressed and in a second position the trigger compression spring is released.
In this way, when the line voltage is normal, the under-voltage release is energized, the under-voltage release generates sufficient suction force, the movable trigger rod can be fixed in the movable block by overcoming the action of the compression spring for triggering, and the stop block is arranged in the space between the main body and the movable block to stop the movable trigger rod from moving towards the main body, so that the under-voltage release is in a failure position, the stop block of the movable ejector rod can prevent the movable trigger rod from moving towards the main body, the under-voltage release is in a failure state, and the circuit breaker can normally close and open. When an under-voltage event occurs, for example, the voltage on the circuit is completely disappeared or the voltage is reduced to 70-35% of the rated voltage, the suction force of the under-voltage release is disappeared, the stop block can be separated from the space between the main body and the movable block by operating the control operation part, so that the movable trigger rod is released, the movable trigger rod can trigger the pawl of the spring operation mechanism in the circuit breaker, the circuit breaker finishes the breaking action, the circuit breaker is disconnected, the power supply is cut off, and the load electric appliances or electric equipment below the circuit breaker are prevented from being damaged by the under-voltage.
According to still another exemplary embodiment of the present application, there is provided a circuit breaker including the above-described under-voltage trip unit and a case accommodating the under-voltage trip unit, wherein the control operation part is disposed outside the case via an opening opened at a side wall of the case.
In this way, the control operation portion can be operated outside the circuit breaker to restore the under-voltage tripper to a normal operation state without disassembling the casing of the circuit breaker, and can be operated to maintain the failure state of the under-voltage tripper when the under-voltage tripper is in the failure state again.
In the embodiment of the application, the under-voltage release can be kept in a failure state through the mechanical transmission device which is manually operated, and can be restored to a normal working state through manual operation, so that the starting and disabling operations of the under-voltage release can be controlled in a simple manner.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute a limitation on the application. In the drawings:
fig. 1 is a schematic perspective view of a transmission according to an embodiment of the application.
Fig. 2 is a schematic perspective view of an under-voltage release according to an embodiment of the application.
Fig. 3A and 3B illustrate cross-sectional views of a portion of an under-voltage release according to an embodiment of the present application.
Fig. 4 is a schematic perspective view of a circuit breaker according to an embodiment of the present application.
Reference numerals illustrate:
100: a transmission device;
200: an undervoltage release;
300: a circuit breaker;
10: a bracket;
20: a movable ejector rod;
21: a stop block;
22: a compression spring;
30: a control cable;
40: a control operation unit;
201: a main body;
202: a movable trigger lever;
203: a movable block;
204: a compression spring for triggering.
Detailed Description
In order that those skilled in the art will better understand the present application, a technical solution in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present application without making any inventive effort, shall fall within the scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the signals so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
As discussed in the foregoing background, the existing under-voltage trippers are often blocked (i.e., disabled) due to the problem of inconvenient operation, and the under-voltage protection is abandoned, so that the cumbersome power transmission is avoided. Under the condition, although the voltage quality of the distribution network is high, once low voltage occurs, some household appliances and medical equipment using an alternating current motor can be damaged lightly; and then a vicious circle that the reactive power of the power grid is increased and the voltage is further reduced is formed again, and finally the power distribution network system is crashed.
To this end, the present application is conceived to install a manual mechanical transmission on a conventional under-voltage trip, which is capable of maintaining the under-voltage trip in a disabled state and restoring the under-voltage trip to a normal operating state by performing a manual operation outside a case of a circuit breaker, so that enabling and disabling operations of the under-voltage trip can be controlled in a simple manner, and thus under-voltage protection can be easily started and troublesome power transmission can be avoided.
Fig. 1 is a schematic perspective view of a transmission device according to an embodiment of the present application, and fig. 2 is a schematic perspective view of an under-voltage release according to an embodiment of the present application. As shown in fig. 1 and 2, a transmission 100 according to an embodiment of the present application for controlling an activation action of an under-voltage trip 200, the under-voltage trip 200 including a main body 201 and a movable trigger lever 202 (shown in fig. 3A and 3B) provided at the main body 201 and protruding outward from the main body 201, the movable trigger lever 202 being configured to be movable toward the main body 201 to activate the under-voltage trip 200, the transmission 100 including: the bracket 10, the bracket 10 has a plate body 11 and first and second side walls 12 and 13 extending from the plate body 11, and the plate body 11, the first and second side walls 12 and 13 form a U shape. The transmission 100 also includes a transmission body that includes: a movable jack 20, one end of the movable jack 20 is provided with a stop block 21, and the other end of the movable jack 20 passes through the first side wall 12 and is arranged between the first side wall 12 and the second side wall 13; and a compression spring 22 sleeved on the movable ejector rod 20 and arranged between the stop block 21 and the first side wall 12. The transmission device 100 further comprises a control cable 30, wherein one end of the control cable 30 passes through the second side wall 13 and is fixed with the other end of the movable ejector rod 20; and a control operation part 40, the control operation part 40 can be operated by an operator to drive the control cable 30 to move the movable push rod 20, wherein the other end of the control cable 30 is fixed with the control operation part 40.
As shown in fig. 2 and 3A and 3B, the transmission body is mounted on the under-voltage release 200 by the bracket 10, and the stopper 21 of the movable plunger 20 is movable between a first position (corresponding to fig. 3A) in which the stopper 21 of the movable plunger 20 blocks the movable trigger 202 from moving toward the body 201, and a second position (corresponding to fig. 3B) in which the stopper 21 of the movable plunger 20 allows the movable trigger 202 to move toward the body 201, wherein the compression spring 22 is released in the first position, and the compression spring 22 is compressed in the second position.
Specifically, as illustrated in fig. 2 and fig. 3A and 3B, the under-voltage release 200 may further include: a movable block 203, an extended end portion of the movable trigger bar 202 is fixed in the movable block 203, and the movable block 203 is movable as the movable trigger bar 202 moves, wherein in a first position, a stopper 21 is provided in a space between the main body 201 and the movable block 203 to block the movable trigger bar 202 from moving toward the main body 201, and in a second position, the stopper 21 is away from the space between the main body 201 and the movable block 203 to allow the movable trigger bar 202 to move toward the main body 201.
In this way, when the line voltage is normal, the under-voltage release is energized, the under-voltage release generates sufficient suction force, thereby causing the movable trigger lever 202 to be in a failure position, in which the stopper 21 of the movable jack 20 can be disposed in the space between the main body 201 and the movable block 203, thereby preventing the movable trigger lever 202 from moving toward the main body 201, the under-voltage release is in a failure state, and the circuit breaker can normally close and open. When an under-voltage event occurs, for example, the voltage on the circuit is completely disappeared or the voltage drops to the range of 70% to 35% of the rated voltage, the suction force of the under-voltage release is disappeared, the control operation part 40 can be operated to drive the control cable 30 to move the movable push rod 20 so as to separate the stop block 21 from the space between the main body 201 and the movable block 203, thereby releasing the movable trigger rod 202, the movable trigger rod 202 can trigger the pawl of the spring operation mechanism in the circuit breaker, and thus the circuit breaker completes the breaking action, the circuit breaker is disconnected, the power supply is cut off, and the load electric appliances or electric equipment below the circuit breaker are prevented from being damaged by the under-voltage.
Details of the various components of the transmission 100 will be described in detail below.
Support frame
As shown in fig. 1, the bracket 10 has a plate body 11 and first and second side walls 12 and 13 extending from the plate body 11, the first side wall 12 has a first mounting hole 12a, the second side wall 13 has a second mounting hole 13a opposite to the first mounting hole 12a, the movable jack 20 passes through the first mounting hole 12a and is positioned in the first mounting hole 12a, and one end of the control cable 30 passes through the second mounting hole 13a to fix one end of the control cable 30 with the other end of the movable jack 20.
Further, the bracket 10 also includes a plurality of additional mounting holes 12b open on the first side wall 12 to mount the transmission body to the under-voltage release, as described below.
Transmission main body
As an example, the transmission body may include: a movable jack 20, one end of the movable jack 20 is provided with a stop block 21, and the other end of the movable jack 20 passes through the first side wall 12 and is arranged between the first side wall 12 and the second side wall 13; a compression spring 22 sleeved on the movable ejector rod 20 and arranged between the stop block 21 and the first side wall 12; and alternatively or additionally a sleeve 23 is fitted over the movable ram 20, and a compression spring 22 is fitted over the sleeve 23, the length of the sleeve 23 being shorter than the length of the movable ram 20 to define the maximum travel that the stop 21 can move.
As shown in fig. 1, as an example, the free end portion of the stopper 21 is provided with an arc-shaped groove 21a that mates with the movable trigger lever 202, and the groove 21a can engage the movable trigger lever 202, whereby the stopper 21 can stably block the movement of the movable trigger lever 202 toward the main body 201.
As an example, one end of the sleeve 23 has a flange 23a, the flange 23a having mounting holes aligned with the plurality of additional mounting holes 12b on the first sidewall 12, and the sleeve 23 is fixedly mounted on the first sidewall 12 by the flange 23a through the mounting holes of the flange 23a and the plurality of additional mounting holes 12b on the first sidewall 12 by fasteners (e.g., bolts, screws, etc.).
In the present example, the maximum stroke here refers to a difference obtained by subtracting the length of the sleeve 23 from the length of the movable jack 20 between the first side wall 12 and the stopper block 21, whereby the stopper block 21 is blocked from further movement by the sleeve 23 after moving the difference. In the present example, the maximum stroke L may be about 25mm, but the present application is not limited thereto.
Therefore, with this structure, the distance by which the stopper 21 is moved can be restrained at the same time that the stopper 21 is moved out of the space between the main body 201 and the movable block 203, so that it is possible to avoid the stopper 21 from being moved too far by manual operation to easily damage the compression spring 22, and to make the operation distance relatively short, providing the operation convenience of the transmission.
Control operation part
The control operation section 40 may include: an operation section 41 having a transmission lever 41b and two handles 41a forming a T shape with the transmission lever 41 b; a first mounting portion 42 having a U-shape with an open end, a bottom end opposite to the open end, and a recess between the open end and the bottom end, the bottom end of the first mounting portion 42 having an opening 42a through which the other end of the control cable 30 passes to fix the other end of the control cable 30 together with the transmission rod 41b in the recess of the first mounting portion 42, the U-shaped side surface of the first mounting portion 42 having an outwardly extending tab portion 42b; a second mounting portion 43, the second mounting portion 43 having a cylindrical body 43a, a sliding groove (not shown) being provided at a center portion of the cylindrical body 43a, two elongated openings 43b being provided on an outer wall of the cylindrical body 43a in parallel with the sliding groove and opposed to each other; and a flat plate portion 43c provided on an end side of the columnar body 43a opposite to the tab portion 42b, the flat plate portion 43c having an opening communicating with the slide groove for the transmission rod 41b to pass therethrough, wherein the transmission rod 41b is provided in the slide groove in such a manner as to extend along the slide groove to be slidable in the slide groove, and the two handles 41a are slid along the two elongated openings 43b, wherein the tab portion 42b of the first mounting portion 42 and the flat plate portion 43c of the second mounting portion 43 are fixed together.
In this way, a stable and easy-to-operate control operation portion can be formed, for example, the two handles 41a are held by hand to be pulled to bring the control cable 30 to move the movable jack 20, thereby moving the stopper 21 to release the movable trigger 202.
As an example, a stopper (not shown) may be further provided at an end of the cylindrical body 43a remote from the flat plate portion 43c, the stopper restricting a maximum stroke of the transmission rod 41b moving away from the flat plate portion 43 c. The length of this maximum stroke may be equal to the length of the maximum stroke that defines the movement of the stop 21, for example equal to about 25mm.
In this way, the moving distance of the movable jack 20 can be indirectly limited, so that it is possible to avoid the stopper piece 21 from being moved too far to easily damage the compression spring 22 by manual operation, and the operating distance can be relatively short, thereby providing the convenience of operation of the control operation portion.
Control cable
The control cable 30 may include a first end 30a, the first end 30a being provided to pass through the first cable assembly 14 and the first cable assembly 14 being fixed in the second mounting hole 13a, a tip of the first end 30a being fixed with the other end of the movable push rod 20; a second end 30b penetrating into the second cable fitting 15 and fixed in the opening 42a at the bottom end of the first mounting portion 42, the end of the second end 30b being fixed with one end of the transmission rod 41 b; and an intermediate portion 30c between the first end portion 30a and the second end portion 30b, the intermediate portion 30c may be sheathed with an insulating material, for example, the intermediate portion 30c being provided in a tube made of an insulating material.
As an example, as shown in fig. 1, the tip of the first end 30a of the control cable 30 may be fixed with the other end of the movable push rod 20 through the first fixing block 16, wherein one side of the first fixing block 16 has a first fixing hole in which the tip of the first end 30a of the control cable 30 is fixed, and the opposite side of the first fixing block 16 has a first installation groove in which the other end of the movable push rod 20 is installed. The tip of the second end 30b of the control cable 30 may be fixed with one end of the transmission rod 41b through the second fixing block 17, wherein one side of the second fixing block 17 has a second fixing hole, the tip of the second end 30b of the control cable 30 may be installed in the second fixing hole of the second fixing block 17, the opposite side of the second fixing block 17 has a second installation groove, and the end of the transmission rod 41b is installed in the second installation groove.
With the above structure, the control cable can be firmly fixed between the movable jack 20 and the transmission lever 41b, so that the movable jack 20 can be stably pulled to move.
As an example, the control cable 30 may be a wire bundle of a plurality of steel wires, a nylon wire, or the like, as long as the function of pulling the movable jack 20 can be achieved.
In addition to the above-described constituent components, the transmission 100 according to the embodiment of the present application may further include: the travel switch 50, the travel switch 50 may include a first portion 50a and a second portion 50b, the first portion 50a is disposed on the plate 11 of the bracket 10, the second portion 50b is fixed on the movable jack 20 between the first side wall 12 and the second side wall 13, the first portion 50a is provided with an indication portion (not shown), and the second portion 50b indicates that the stopper 21 of the movable jack 20 is in the first position or the second position through the indication portion.
Specifically, as shown in fig. 1, the plate 11 may be provided with a window 11a, and the indication portion of the first portion 50a may be provided as an indication that extends out of the window 11a, that is, to the back side of the plate 11 (i.e., the side opposite to the space between the first side wall and the second side wall) to indicate that the stopper 21 of the movable jack 20 is in the first position or the second position.
With this structure, it is possible to determine whether the under-voltage release is in the under-voltage operation state or the under-voltage operation state, and as described above, at the time of the under-voltage release, the under-voltage release maintains the latch state (i.e., the fail state, the stopper 21 is in the first position), and at the time of the pure under-voltage, the manual operation is released from the latch, and the under-voltage release can normally operate (i.e., the stopper 21 is in the second position).
The above describes the configuration structure of the transmission according to the present application, which can be mounted on the conventional under-voltage trip, so that the under-voltage trip can be additionally restored to a normal operating state by manual operation without disassembling the case of the under-voltage trip or the circuit breaker without changing the structure of the conventional under-voltage trip, and the manual operation can be performed again to maintain the failure state of the under-voltage trip when the under-voltage trip is in the failure state again. The configuration structure of the under-voltage release according to the present application is specifically described below.
As shown in fig. 1 and 2, the under-voltage release 200 according to the present application includes the above-mentioned transmission 100, and the transmission body of the above-mentioned transmission 100 is mounted to the outer wall of the housing 200a of the under-voltage release 200 through a plurality of additional mounting holes 12b provided on the first side wall 12 of the bracket 10, wherein a fixing member (e.g., a screw) is fixedly mounted to the under-voltage release 200 through the mounting holes of the flange 23a of the sleeve 23, the mounting holes of the outer wall of the housing 200a of the under-voltage release 200, and the additional mounting holes 12b on the first side wall 12, which are aligned with each other.
As an example, as shown in fig. 2 and fig. 3A and 3B, the under-voltage trip 200 may include: a main body 201; a movable trigger lever 202 disposed at the main body 201 and protruding outward from the main body 201, the movable trigger lever 202 being configured to be movable toward the main body 201 to activate the under-voltage trip 200; the movable block 203, the protruding end portion of the movable trigger lever 202 is fixed in the movable block 203, and the movable block 203 can move as the movable trigger lever 202 moves. Wherein in a first position (i.e., a fail position), the stopper 21 is disposed in a space between the main body 201 and the movable block 203 to block the movable trigger lever 202 from moving toward the main body 201, and in a second position (a normal operation position), the stopper 21 is away from the space between the main body 201 and the movable block 203 to allow the movable trigger lever 202 to move toward the main body 201; and a trigger compression spring 204 that is sleeved on the movable trigger lever 202, wherein the trigger compression spring 204 is compressed in a first position (i.e., a failure position), and the trigger compression spring 204 is released in a second position (a normal operation position). Specifically, when the stopper 21 is provided in the space between the main body 201 and the movable block 203 to block the movable trigger lever 202 from moving toward the main body 201, the trigger compression spring 204 is held in a compressed state, whereby the movable trigger lever 202 is in a closed state, and when the stopper 21 is away from the space between the main body 201 and the movable block 203, the trigger compression spring 204 is released to return to the original state, whereby the movable trigger lever 202 moves toward the main body 201 by the trigger compression spring 204, whereby the movable trigger lever 202 is released.
In this way, when the line voltage is normal, the under-voltage release is energized, the under-voltage release generates sufficient suction force, the movable trigger lever 202 can be fixed in the movable block 203 against the action of the trigger compression spring 204, and the stopper 21 is provided in the space between the main body 201 and the movable block 203 to block the movement of the movable trigger lever 202 toward the main body 201, whereby the under-voltage release is in a failure position where the stopper 21 of the movable jack 20 can prevent the movement of the movable trigger lever 202 toward the main body 201, the under-voltage release is in a failure state, and the circuit breaker can normally close and open. When an under-voltage event occurs, for example, the voltage on the circuit is completely lost or the voltage drops to the range of 70% to 35% of the rated voltage, the suction force of the under-voltage release is lost, the stop block 21 can be separated from the space between the main body 201 and the movable block 203 by operating the control operation part, thereby the triggering compression spring 204 is restored to release energy, the movable triggering rod 202 is driven to move by the release of energy, the movable triggering rod 202 can trigger the pawl of the spring operation mechanism in the circuit breaker, so that the circuit breaker completes the breaking action, the circuit breaker is opened, the power supply is cut off, and the load electric appliances or electric equipment below the circuit breaker are prevented from being damaged by the under-voltage.
As described above, the under-voltage release is a device for facilitating the opening of the circuit breaker at the time of under-voltage and is connected to the power supply side of the circuit breaker, and the under-voltage release of the present application is applied to the circuit breaker, and the configuration structure of the circuit breaker according to the present application will be described in detail below.
As shown in fig. 4, the circuit breaker 300 according to the present application includes the above-described under-voltage release 200 and a case 301 in which the under-voltage release 200 is mounted. The side wall of the housing 301 is provided with an opening 300a, and at least a part of the control operation portion 40 is provided outside the housing 301 via the opening 300a opened in the side wall of the housing, specifically, the first mounting portion 42 of the control operation portion may be installed in the opening 300a, and two handles 41a may be provided outside the housing 301, whereby the control operation portion may be operated outside the circuit breaker.
In this way, the control operation portion 40 can be operated outside the circuit breaker to restore the under-voltage trip 200 to a normal operation state without disassembling the casing of the circuit breaker, and can be operated to maintain the failure state of the under-voltage trip 200 when the under-voltage trip 200 is in the failure state again.
In the embodiment of the application, the under-voltage release can be kept in a failure state through the mechanical transmission device which is manually operated, and can be restored to a normal working state through manual operation, so that the starting and disabling operations of the under-voltage release can be controlled in a simple manner.
In the foregoing embodiments of the present application, the descriptions of the embodiments are emphasized, and for a portion of this disclosure that is not described in detail in this embodiment, reference is made to the related descriptions of other embodiments.
In the several embodiments provided in the present application, it should be understood that the disclosed technology may be implemented in other manners. The above-described embodiments of the apparatus are merely exemplary, and are merely a logic function division, and may be implemented in other manners, such as multiple units or components may be combined or integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be through some interface, unit or indirect coupling or communication connection of units, electrical or otherwise.
The units or units illustrated as separate components may or may not be physically separate, and components shown as units or units may or may not be physical units or units, may be located in one place, or may be distributed over a plurality of network units or units. Some or all of the units or units may be selected according to actual needs to achieve the purpose of the embodiment.
In addition, each functional unit or unit in the embodiments of the present application may be integrated in one processing unit or unit, or each unit or unit may exist alone physically, or two or more units or units may be integrated in one unit or unit. The integrated units or units described above may be implemented either in hardware or in software functional units or units.
The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be embodied in essence or a part contributing to the prior art or all or part of the technical solution in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server or a network device, etc.) to perform all or part of the steps of the method of the various embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a removable hard disk, a magnetic disk, or an optical disk, or other various media capable of storing program codes.
The foregoing is merely a preferred embodiment of the present application and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present application, which are intended to be comprehended within the scope of the present application.
Claims (11)
1. Transmission for controlling the activation action of an under-voltage release (200), the under-voltage release (200) comprising a main body (201) and a movable trigger lever (202) arranged at the main body (201) and protruding outwards from the main body (201), the movable trigger lever (202) being configured to be movable towards the main body (201) for activating the under-voltage release (200), characterized in that the transmission comprises:
a bracket (10), the bracket (10) having a plate body (11) and first and second side walls (12, 13) extending from the plate body (11), the first and second side walls (12, 13) forming a U-shape,
a transmission body comprising:
a movable ejector rod (20), one end of the movable ejector rod (20) is provided with a stop block (21), the other end of the movable ejector rod (20) passes through the first side wall (12) and is arranged between the first side wall (12) and the second side wall (13), and
a compression spring (22) sleeved on the movable ejector rod (20) and arranged between the stop block (21) and the first side wall (12),
a control cable (30), one end of the control cable (30) passes through the second side wall (13) and is fixed with the other end of the movable ejector rod (20), and
a control operation part (40), wherein the control operation part (40) can be operated to drive the control cable (30) to move the movable ejector rod (20), the other end of the control cable (30) is fixed with the control operation part (40),
wherein the transmission body is mounted on the under-voltage release (200) by means of the bracket (10), the stop block (21) of the movable ejector (20) being movable between a first position, in which the stop block (21) of the movable ejector (20) prevents the movable trigger lever (202) from moving towards the body (201), and a second position, in which the stop block (21) of the movable ejector (20) allows the movable trigger lever (202) to move towards the body (201),
wherein in the first position the compression spring (22) is released and in the second position the compression spring (22) is compressed.
2. The transmission of claim 1, wherein the transmission body further comprises:
a sleeve (23) sleeved on the movable ejector rod (20), and the compression spring (22) is sleeved on the sleeve (23), the length of the sleeve (23) is shorter than the length of the movable ejector rod (20) so as to limit the maximum travel of the stop block (21),
wherein one end of the sleeve (23) is provided with a flange (23 a), and the flange (23 a) is fixedly arranged on the first side wall (12).
3. The transmission of claim 1, further comprising:
travel switch (50), including first part (50 a) and second part (50 b), first part (50 a) set up in on plate body (11) of support (10), second part (50 b) are fixed in on movable ejector pin (20) between first lateral wall (12) and second lateral wall (13), first part (50 a) is provided with the indicator, second part (50 b) is through indicator indicates movable ejector pin (20) backstop piece (21) is in first position or second position.
4. A transmission according to any one of claims 1 to 3, wherein the first side wall (12) has a first mounting hole (12 a), the second side wall (13) has a second mounting hole (13 a) opposite to the first mounting hole (12 a), the movable jack (20) passes through the first mounting hole (12 a) and is positioned in the first mounting hole (12 a), and one end of the control cable (30) passes through the second mounting hole (13 a) to fix one end of the control cable (30) with the other end of the movable jack (20).
5. The transmission device according to claim 4, wherein the control operation portion (40) includes:
an operation unit (41) having a transmission rod (41 b) and two handles (41 a) that form a T-shape with the transmission rod (41 b);
a first mounting portion (42), the first mounting portion (42) having a U-shape with an open end, a bottom end opposite to the open end, and a recess between the open end and the bottom end, the bottom end of the first mounting portion (42) having an opening (42 a) through which the other end of the control cable (30) passes to fix the other end of the control cable (30) together with the transmission rod (41 b) in the recess of the first mounting portion (42), a U-shaped side surface of the first mounting portion (42) having a tab portion (42 b) extending outward;
a second mounting portion (43), the second mounting portion (43) having a cylindrical body (43 a), a sliding groove being provided at a center portion of the cylindrical body (43 a), two elongated openings (43 b) being provided on an outer wall of the cylindrical body (43 a) in parallel with the sliding groove and opposed to each other, a flat plate portion (43 c) being provided on an end side of the cylindrical body (43 a) opposed to the tab portion (42 b), the flat plate portion (43 c) having an opening communicating with the sliding groove for the transmission rod (41 b) to pass therethrough, wherein the transmission rod (41 b) is provided in the sliding groove so as to be slidable therein in a manner extending along the sliding groove, the two handles (41 a) are slid along the two elongated openings (43 b),
wherein the tab portion (42 b) of the first mounting portion (42) and the flat plate portion (43 c) of the second mounting portion (43) are fixed together.
6. The transmission of claim 5, further comprising:
a first cable fitting (14), the control cable (30) being threaded into the first cable fitting (14) and the first cable fitting (14) being fixed in the second mounting hole (13 a),
a second cable assembly (15), the control cable (30) being threaded into the second cable assembly (15) and the second cable assembly (15) being secured in the aperture (42 a) of the bottom end,
a first fixed block (16), one side of the first fixed block (16) is provided with a first fixed hole, one end of the control cable (30) is fixed in the first fixed hole of the first fixed block (16), the opposite side of the first fixed block (16) is provided with a first mounting groove, the other end of the movable ejector rod (20) is mounted in the first mounting groove, and
the second fixed block (17), one side of the second fixed block (17) is provided with a second fixed hole, the other end of the control cable (30) is installed in the second fixed hole of the second fixed block (17), the opposite side of the second fixed block (17) is provided with a second installation groove, and the end part of the transmission rod (41 b) is installed in the second installation groove.
7. The transmission device according to claim 5, characterized in that an end of the cylindrical body (43 a) of the second mounting portion (43) remote from the flat plate portion (43 c) is provided with a stopper that limits the maximum travel of the transmission rod (41 b) moving away from the flat plate portion (43 c).
8. An under-voltage release (200), characterized in that the under-voltage release (200) comprises: the transmission according to any one of claims 1 to 7.
9. The under-voltage release (200) of claim 8, wherein the under-voltage release (200) further comprises:
a movable block (203), an extended end portion of the movable trigger lever (202) being fixed in the movable block (203), and the movable block (203) being movable as the movable trigger lever (202) moves,
wherein in the first position, the stop block (21) is disposed in a space between the main body (201) and the movable block (203) to block the movable trigger lever (202) from moving toward the main body (201), and in the second position, the stop block (21) is away from the space between the main body (201) and the movable block (203) to allow the movable trigger lever (202) to move toward the main body (201).
10. The under-voltage release of claim 9, wherein the movable trigger lever (202) is sheathed with a trigger compression spring (204), wherein in the first position the trigger compression spring (204) is compressed and in the second position the trigger compression spring (204) is released.
11. Circuit breaker, characterized by comprising an under-voltage release (200) according to any of claims 8-10 and a housing (301) accommodating the under-voltage release (200), wherein at least a part of the control operation portion (40) is arranged outside the housing (301) via an opening (300 a) opened in a side wall of the housing (301).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311153975.3A CN116884817B (en) | 2023-09-07 | 2023-09-07 | Transmission device, undervoltage release and circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311153975.3A CN116884817B (en) | 2023-09-07 | 2023-09-07 | Transmission device, undervoltage release and circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116884817A true CN116884817A (en) | 2023-10-13 |
| CN116884817B CN116884817B (en) | 2023-11-28 |
Family
ID=88268528
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311153975.3A Active CN116884817B (en) | 2023-09-07 | 2023-09-07 | Transmission device, undervoltage release and circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116884817B (en) |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0176066A2 (en) * | 1984-09-28 | 1986-04-02 | Siemens Aktiengesellschaft | Driving device for an electrical power circuit breaker |
| US5973279A (en) * | 1997-12-12 | 1999-10-26 | Eaton Corporation | Stabilizer for a circuit breaker handle mechanism |
| US20020149451A1 (en) * | 2001-04-17 | 2002-10-17 | Bogdon Erik Russel | Actuator mechanism for an external circuit breaker operating device |
| CN1436355A (en) * | 2000-06-12 | 2003-08-13 | 奥蒂斯电梯公司 | Mechanical reset device for switch |
| US20040035689A1 (en) * | 2000-06-12 | 2004-02-26 | Jose-Miguel Aguado | Mechanical reset device for switch |
| CN2805069Y (en) * | 2004-12-27 | 2006-08-09 | 乐清市阿珥南机电有限公司 | Circuit-breaker for electrical-leakage of equipment |
| CN101123154A (en) * | 2006-08-10 | 2008-02-13 | 三菱电机株式会社 | Circuit breaker |
| EP2562779A1 (en) * | 2011-08-23 | 2013-02-27 | Eaton Industries GmbH | Closable side lever drive of an electric switcher device |
| CN104246951A (en) * | 2012-04-25 | 2014-12-24 | 阿尔斯通技术有限公司 | Removable locking device for electrical equipment |
| CN204179034U (en) * | 2014-10-08 | 2015-02-25 | 苏州西门子电器有限公司 | The device for under-voltage releasing equipment locking mechanism of circuit breaker and circuit breaker thereof |
| CN205959925U (en) * | 2016-04-14 | 2017-02-15 | 乐清市智顺电气有限公司 | Electrical protective device's supplementary trip gear |
| CN215527653U (en) * | 2021-08-05 | 2022-01-14 | 上海良信电器股份有限公司 | Adjusting structure of thermal release and circuit breaker |
| CN218333662U (en) * | 2022-08-18 | 2023-01-17 | 湖北省电力装备有限公司 | Mechanical tripping device of intelligent circuit breaker |
-
2023
- 2023-09-07 CN CN202311153975.3A patent/CN116884817B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0176066A2 (en) * | 1984-09-28 | 1986-04-02 | Siemens Aktiengesellschaft | Driving device for an electrical power circuit breaker |
| US5973279A (en) * | 1997-12-12 | 1999-10-26 | Eaton Corporation | Stabilizer for a circuit breaker handle mechanism |
| CN1436355A (en) * | 2000-06-12 | 2003-08-13 | 奥蒂斯电梯公司 | Mechanical reset device for switch |
| US20040035689A1 (en) * | 2000-06-12 | 2004-02-26 | Jose-Miguel Aguado | Mechanical reset device for switch |
| US20020149451A1 (en) * | 2001-04-17 | 2002-10-17 | Bogdon Erik Russel | Actuator mechanism for an external circuit breaker operating device |
| CN2805069Y (en) * | 2004-12-27 | 2006-08-09 | 乐清市阿珥南机电有限公司 | Circuit-breaker for electrical-leakage of equipment |
| CN101123154A (en) * | 2006-08-10 | 2008-02-13 | 三菱电机株式会社 | Circuit breaker |
| EP2562779A1 (en) * | 2011-08-23 | 2013-02-27 | Eaton Industries GmbH | Closable side lever drive of an electric switcher device |
| CN104246951A (en) * | 2012-04-25 | 2014-12-24 | 阿尔斯通技术有限公司 | Removable locking device for electrical equipment |
| CN204179034U (en) * | 2014-10-08 | 2015-02-25 | 苏州西门子电器有限公司 | The device for under-voltage releasing equipment locking mechanism of circuit breaker and circuit breaker thereof |
| CN205959925U (en) * | 2016-04-14 | 2017-02-15 | 乐清市智顺电气有限公司 | Electrical protective device's supplementary trip gear |
| CN215527653U (en) * | 2021-08-05 | 2022-01-14 | 上海良信电器股份有限公司 | Adjusting structure of thermal release and circuit breaker |
| CN218333662U (en) * | 2022-08-18 | 2023-01-17 | 湖北省电力装备有限公司 | Mechanical tripping device of intelligent circuit breaker |
Also Published As
| Publication number | Publication date |
|---|---|
| CN116884817B (en) | 2023-11-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1964143B1 (en) | Fault interrupting and reclosing device | |
| US8368489B2 (en) | Circuit breaker having trip cause indicating mechanism | |
| JP2007504631A (en) | Power switch | |
| CN102714115B (en) | Miniature circuit breaker | |
| EP2110835B1 (en) | Readiness for closing indicator for circuit breakers | |
| CN101562099B (en) | Electromechanical interlock for electrical protection devices | |
| US5661627A (en) | Arrangement for controlling the switching of a power circuit breaker | |
| JPS643021B2 (en) | ||
| CN116884817B (en) | Transmission device, undervoltage release and circuit breaker | |
| CN112837977A (en) | Tripping protection device of electromechanical hybrid circuit breaker | |
| JP4561578B2 (en) | Vacuum circuit breaker | |
| CN216902655U (en) | Tripping device and isolating switch | |
| CN210743865U (en) | Low-voltage vacuum circuit breaker | |
| CN112768307A (en) | Fixed unlocking device of plug-in electromechanical hybrid circuit breaker | |
| CN213483647U (en) | Spring operating mechanism with voltage loss and under-voltage tripping protection | |
| CN112768276A (en) | Intelligent hybrid circuit breaker | |
| CN112768277A (en) | Intelligent circuit breaker emergency stop device | |
| US6633210B1 (en) | Switch lever captivation device | |
| CN219350113U (en) | Transmission mounting structure of auxiliary alarm and shunt undervoltage accessory of circuit breaker | |
| CN220456330U (en) | Tripping mechanism and circuit breaker | |
| CN204905191U (en) | Low -voltage circuit breaker's operational structure | |
| CN104241048B (en) | Electromagnetic tripping device and breaker | |
| CN216849815U (en) | Locking device of high-voltage circuit breaker mechanism electromagnet | |
| CN212231914U (en) | Electric and mechanical interlocking device | |
| CN111048328B (en) | Air electric switch capable of automatically closing |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |