CA2040863C - Instantaneous trip device of a circuit breaker - Google Patents
Instantaneous trip device of a circuit breaker Download PDFInfo
- Publication number
- CA2040863C CA2040863C CA002040863A CA2040863A CA2040863C CA 2040863 C CA2040863 C CA 2040863C CA 002040863 A CA002040863 A CA 002040863A CA 2040863 A CA2040863 A CA 2040863A CA 2040863 C CA2040863 C CA 2040863C
- Authority
- CA
- Canada
- Prior art keywords
- circuit breaker
- contacts
- arc extinguishing
- extinguishing chamber
- pressure
- 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.)
- Expired - Fee Related
Links
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
- H01H71/12—Automatic release mechanisms with or without manual release
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/50—Means for detecting the presence of an arc or discharge
-
- 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
- H01H71/24—Electromagnetic mechanisms
- H01H71/2418—Electromagnetic mechanisms combined with an electrodynamic current limiting mechanism
- H01H2071/2427—Electromagnetic mechanisms combined with an electrodynamic current limiting mechanism with blow-off movement tripping mechanism, e.g. electrodynamic effect on contacts trips the traditional trip device before it can unlatch the spring mechanism by itself
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H77/00—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting
- H01H77/02—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism
- H01H2077/025—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with pneumatic means, e.g. by arc pressure
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
- H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
- H01H9/342—Venting arrangements for arc chutes
Abstract
A limiting circuit breaker with a molded case comprises an overpressure actuator which, when an overpressure occurs in the arc extinguishing chamber due to the action of an arc drawn by the electrodynamic repulsion of the contacts, brings about actuation by a piston, subjected to this overpressure, of the circuit breaker trip bar. The overpressure actuator forms an almost leaktight assembly.
Description
' ~ 1 INSTANTANEOUS TRIP DEVICE OF A CIRCUIT BREAKER
BACKGROUND OF THE INVENTION
The invention relates to a trip device of a molded case electrical circuit breaker having per pole a pair of contacts elastically urged into contact in the closed position of the circuit breaker and capable of separating due to the action of electrodynamic repulsion forces when the current flowing through the contacts exceeds a preset threshold to generate limitation of said current, said trip device having an overload and/or short-circuit fault detector which actuates an automatic opening operating mechanism of the circuit breaker on a fault. , A state-~f=the-art trip device (US-A-3,631,369) of the kind mentioned comprises a movable blade, arranged as a bimetal strip and subjected to the action of 'the electromagnetic trip device.
An extension of the blade protrudes into the gas outflow duct of the arc extinguishing chamber. When breaking occurs the gas flow moves the blade to the tripping position. In most circuit breakers the gas outflow duct is located away from the trip device and the previously mentioned device is therefore not applicable. The blade is subjected to 'the polluting action of the gases and its correct operation is quickly hindered. Each pole must be equipped with a trip device of this kind and selectivity of tripping is not conceivable for the actuator reacting to the gas flow is integrated in the thermal and magnetic trip device.
The object of the present invention is to achieve a trip device providing both limitation and selectivity of tripping by simple, universal and reliable means.
BACKGROUND OF THE INVENTION
The invention relates to a trip device of a molded case electrical circuit breaker having per pole a pair of contacts elastically urged into contact in the closed position of the circuit breaker and capable of separating due to the action of electrodynamic repulsion forces when the current flowing through the contacts exceeds a preset threshold to generate limitation of said current, said trip device having an overload and/or short-circuit fault detector which actuates an automatic opening operating mechanism of the circuit breaker on a fault. , A state-~f=the-art trip device (US-A-3,631,369) of the kind mentioned comprises a movable blade, arranged as a bimetal strip and subjected to the action of 'the electromagnetic trip device.
An extension of the blade protrudes into the gas outflow duct of the arc extinguishing chamber. When breaking occurs the gas flow moves the blade to the tripping position. In most circuit breakers the gas outflow duct is located away from the trip device and the previously mentioned device is therefore not applicable. The blade is subjected to 'the polluting action of the gases and its correct operation is quickly hindered. Each pole must be equipped with a trip device of this kind and selectivity of tripping is not conceivable for the actuator reacting to the gas flow is integrated in the thermal and magnetic trip device.
The object of the present invention is to achieve a trip device providing both limitation and selectivity of tripping by simple, universal and reliable means.
SUMMARY Of THE INVENTION.
The trip device is characterized in that said actuating device constitutes a leaktight assembly only in communication with the contact zone, and having a limited actuating travel.
The pressure in the contact zone, notably in the arc extinguishing chamber, is a direct function of the power of the arc, and can quickly reach high values, for example from 3 to 10 bars. This overpressure acts on a simple membrane or movable piston device which actuates the circuit breaker tripping mechanism. The pressure rise and transmission of this pressure to the detector take place all the more quickly the higher the currents are. The device is however not sensitive to weak currents, and spurious tripping on a simple overload can easily be avoided by providing a return spring of the piston, or of the measuring membrane.
The actuator is a leaktight or almost leaktight assembly constituted by 'the cylinder with the piston or membrane and the connecting duct between the cylinder a;nd the arc extinguishing chamber. This duct of small cross-section can be relatively. long and is easily housed in the case. The movement of the piston only requires a very small gas flow in the duct and this flow takes place almost totally before pollution of the gases due to the action of the arc. The actuator is thus protected from these polluted gases.
High-speed opening of a limiting circuit breaker is not easily compatible with selectivity of tripping which requires opening of the circuit breaker directly upstream from the fault, whereas , the other downstream circuit breakers remain closed to ensure continuity of power supply to the sound part of the mains system. It has been attempted to achieve selectivity conditions between two circuit breakers fitted serially, by coordinating their tripping curve, but these conditions are difficult to maintain for the times involved are extremely short. Saturation phenomena often mask measurement of the differences of the currents to be broken, and selectivity is not always achieved.
The present invention is based on the observation that a break in a limiting circuit breaker always generates a high arc voltage, and thereby a notable arc energy resulting in a pressure increase in the breaking zone. This pressure increase is very high-speed, and selectivity can be achieved by using a return spring weighted in such a way as to trip at a preset pressure. Indeed, when two circuit breakers of different ratings have the same short-circuit current flowing through them, the pressure in the upstream circuit breaker is much lower than if it had broken on it.s own and selectivity is- automatically achieved in a particularly simple manner, for orxly the circuit breaker having the lower rating trips. This selectivity is absolutely independent from the overload and/or short-circuit fault detector, whose design can be adapted to its role of operating on small currents. The action of the fault detector can be slightly delayed in order to avoid any interference with the overpressure actuator, which provides instantaneous protection as soon as it is required.
According to a development of the invention, each pole of a multipole circuit breaker comprises an overpressure actuator, so as to operate as soon as an overpressure occurs in any one of the poles, and to perform tripping as quickly as possible. The piston of the overpressure actuator can be common to the different poles, the latter being connected to the piston by ducts equipped with an anti-return device. The different arc extinguishing chambers are preferably connected to a common manifold with a check valve interposed, this manifold itself being connected by a duct to the piston or membrane of the overpressure actuator, which acts on the circuit breaker trip bar. Tripping on a fault can be obtained by a standard thermal or electromagnetic trip device, or by a solid-state trip device with a polarized relay. All. these trip devices and actuators act on the same trip bar which releases the circuit breaker opening mechanism, in a manner well-known to those specialized in the art.
The overpressures are high, and the overpressure actuator can therefore comprise a piston of small surface, in the order of one sctuare centimeter, and this small size makes it easy to house in a molded case, possibly of an existing device.
BRIEF DESCRIPTION OF THE DRAWINGS
Other advantages and features will become more clearly apparent.
from the following description of an illustrative embodiment of the invention, given as a non-restrictive example only and represented in the accompanying drawings, in which s Figure 1 is a schematic axial section view of a pole of a circuit breaker ec~aipped with an overpressure actuator according to the invention;
Figure 2 is an enlarged scale view of the overpressure actuator according to figure 1.;
Figure 3 is a schematic view of the overpressure actuator associated with a three-pole circuit breaker;
Figure 4 is a schematic sectional view of an overpressure actuator associated with a polarized relay of a solid-state trip device;
Figure 5 represents the variation curves of the tripping characteristics.
The trip device is characterized in that said actuating device constitutes a leaktight assembly only in communication with the contact zone, and having a limited actuating travel.
The pressure in the contact zone, notably in the arc extinguishing chamber, is a direct function of the power of the arc, and can quickly reach high values, for example from 3 to 10 bars. This overpressure acts on a simple membrane or movable piston device which actuates the circuit breaker tripping mechanism. The pressure rise and transmission of this pressure to the detector take place all the more quickly the higher the currents are. The device is however not sensitive to weak currents, and spurious tripping on a simple overload can easily be avoided by providing a return spring of the piston, or of the measuring membrane.
The actuator is a leaktight or almost leaktight assembly constituted by 'the cylinder with the piston or membrane and the connecting duct between the cylinder a;nd the arc extinguishing chamber. This duct of small cross-section can be relatively. long and is easily housed in the case. The movement of the piston only requires a very small gas flow in the duct and this flow takes place almost totally before pollution of the gases due to the action of the arc. The actuator is thus protected from these polluted gases.
High-speed opening of a limiting circuit breaker is not easily compatible with selectivity of tripping which requires opening of the circuit breaker directly upstream from the fault, whereas , the other downstream circuit breakers remain closed to ensure continuity of power supply to the sound part of the mains system. It has been attempted to achieve selectivity conditions between two circuit breakers fitted serially, by coordinating their tripping curve, but these conditions are difficult to maintain for the times involved are extremely short. Saturation phenomena often mask measurement of the differences of the currents to be broken, and selectivity is not always achieved.
The present invention is based on the observation that a break in a limiting circuit breaker always generates a high arc voltage, and thereby a notable arc energy resulting in a pressure increase in the breaking zone. This pressure increase is very high-speed, and selectivity can be achieved by using a return spring weighted in such a way as to trip at a preset pressure. Indeed, when two circuit breakers of different ratings have the same short-circuit current flowing through them, the pressure in the upstream circuit breaker is much lower than if it had broken on it.s own and selectivity is- automatically achieved in a particularly simple manner, for orxly the circuit breaker having the lower rating trips. This selectivity is absolutely independent from the overload and/or short-circuit fault detector, whose design can be adapted to its role of operating on small currents. The action of the fault detector can be slightly delayed in order to avoid any interference with the overpressure actuator, which provides instantaneous protection as soon as it is required.
According to a development of the invention, each pole of a multipole circuit breaker comprises an overpressure actuator, so as to operate as soon as an overpressure occurs in any one of the poles, and to perform tripping as quickly as possible. The piston of the overpressure actuator can be common to the different poles, the latter being connected to the piston by ducts equipped with an anti-return device. The different arc extinguishing chambers are preferably connected to a common manifold with a check valve interposed, this manifold itself being connected by a duct to the piston or membrane of the overpressure actuator, which acts on the circuit breaker trip bar. Tripping on a fault can be obtained by a standard thermal or electromagnetic trip device, or by a solid-state trip device with a polarized relay. All. these trip devices and actuators act on the same trip bar which releases the circuit breaker opening mechanism, in a manner well-known to those specialized in the art.
The overpressures are high, and the overpressure actuator can therefore comprise a piston of small surface, in the order of one sctuare centimeter, and this small size makes it easy to house in a molded case, possibly of an existing device.
BRIEF DESCRIPTION OF THE DRAWINGS
Other advantages and features will become more clearly apparent.
from the following description of an illustrative embodiment of the invention, given as a non-restrictive example only and represented in the accompanying drawings, in which s Figure 1 is a schematic axial section view of a pole of a circuit breaker ec~aipped with an overpressure actuator according to the invention;
Figure 2 is an enlarged scale view of the overpressure actuator according to figure 1.;
Figure 3 is a schematic view of the overpressure actuator associated with a three-pole circuit breaker;
Figure 4 is a schematic sectional view of an overpressure actuator associated with a polarized relay of a solid-state trip device;
Figure 5 represents the variation curves of the tripping characteristics.
DESCRIPTION OF THE PREFERRED EMBODIMENT
In figure 1, a pole of a molded case circuit breaker 10 comprises a pair of ,contacts 11, 12 located in an arc extinguishing chamber 13 equipped with deionization plates 14.
The arc extinguishing chamber 13 is bounded by partitions 15 one of which has passing through it a support arm 16 of the movable contact 12. The arc extinguishing chamber 13 is almost. leaktight and communicates by a channel 17 of small cross-section with the outside of the molded case 10. The movable contact arm 16 is pivotally mounted on a bar 18 belonging to an operating mechanism 19, having a manual opening and closing handle 20 of the contacts 11, 12 and a latch 21 controling tripping of the mechanism 19. The movable contact 12 is biased by a spring 22 to the closed position, and is capable of pivoting counterclockwise due to the electrodynamic repulsion force generated by the current flowing in the contact arm 16 and contacts 11, 12..The latch 21 is controled by a trip bar 23 common to the different poles of the circuit breaker. The circuit breaker comprises a standard trip device with a bimetal strip 24, and electro-magnet9.e coil 25, both acting on the trip bar 23. A circuit breaker of this kind is well-known to those specialized in the art and does not need to be described in greater detail here. It is sufficient to recall that when- a short-circuit occurs, repulsion of the contacts 11, 12 brings about high-speed opening of these contacts, against the force of the spring 22, this high-speed opening causing limitation of the short-circuit current. Opening of the contacts 11. 12 is confirmed by the operation of the electromagnetic trip device 25 acting via the trip bar 23 on the latch 21, which opens the circuit breaker mechanism 19.
According to the present invention, the circuit breaker comprises an overpressure actuator comprising a piston 26 and cylinder 27 assembly cooperating with the trip bar 23. Referring more particularly to figure 2, it can be seen that the piston 26 slidingly mounted in the cylinder 27 bears a rod 28 capable of striking the trip bar 23. A return spring 29.keeps the piston 26 in the retracted position,' represented in figure 2. The face opposite the rod 28 of the piston 26 is subjected to the pressure in 'the chamber 30 which communicates via a duct 31 with the arc extinguishing chamber 13. In the example represented iri figure 1, the duct 31 opens onto the chamber 13 in the vicinity of the deionisation plates 14, but pressurization can be performed at any point of the chamber 13, uniformization of the pressure inside this chamber being almost instantaneous.
Operation of the circuit breaker according to the invention is derived from the above description. When the contacts 11, 12 open on a short-circuit, the arc drawn between these contacts produces heating of the gas contained in the arc extinguishing chamber 13 and consequently a pressure increase, as a direct function of the energy of the arc. This pressure increase is transmitted by the duct 31 to the chamber 30, and as soon as this overpressure overrides the force of the return spring 29, causes the piston 26 to slide to the left and actuation of the trip bar 23 causing the mechanism 19 to open, confirming the separation of the contacts. Detection of a strong current arc is extremely fast, whereas the overpressure actuator 26, 27 hardly operates for a normal break or a weak current, the overpressure generated in the arc extinguishing chamber 13 being insufficient to overcome the force of the return spring 29. This same spring 29 enables selectivity to be achieved between two circuit breakers of different ratings having the same short-circuit current flowing through them as the pressure developed will be less great than if it had broken on its own.
The circuit breaker can be multipole and in this case each pole can be equipped with its own overpressure actuator 26, 27 acting on the trip bar 23. When a short-circuit occurs, the most loaded . 7..
pole causes tripping by the pressure increase in its arc extinguishinc7 chamber 13,,this trip causing all the poles of the circuit breaker to open.
According to a preferred embodiment, illustrated by figure 3.
three poles P1, P2, P3 of a three-pole circuit breaker communicate via ducts 31 with a manifold 32, itself connected to the chamber 30 of the overpressure actuator 26, 27. The orifice via which the ducts 31 enter the manifold 32 is capable of being blocked off by a check valve 33, preventing the gases from flowing from one pole to the other. In the example represented in figure 3, the pressure increase in the arc extinguishing chamber of the first pole P1 is the quickest, and this pressure is 'transmitted via the duct 31 and manifold 32 to the overpressure actuator 26, 27, the valve 33 being open. The other two poles P2, P3 are isolated from 'the manifold 32 by closing of their corresponding valve 33, and the actuating device remains almost leaktight.
The invention is applicable to circuit breakers with solid-state trip devices using current transformers to detect an overload or short-circuit. These current transformers supply a signal to an electronic processing device which delivers a tripping order to a polarized relay 34 when preset thresholds are exceeded.
Referring to figure 4, it can be seen that the polarized relay 34 comprises a plunger core 35 held in the retracted position by a permanent magnet 36, and biased to the operating position of the trip bar 23, by means of a push-rod 38, by a spring 37. The tripping ~ order is transmitted to a 'coil 39 which releases the core 35. The overpressure actuator 26, 27 is adjacent to the polarized relay 34 and the rod 28 is located facing the trip bar 23 to actuate the latter when an overpressure occurs. The trip bar 23 bears a lug 40, capable of cooperating with the rear face of the head of the push-rod 38, leaving a clearance "j", sufficient for movement of the trip bar 23 due to the action of the overpressure actuator 26, 27, without the core 35 of the relay 34 moving.~This lug 40 causes discharging of the polarized relay 34 after the mechanism 19 has tripped.
Operation of the circuit breaker with solid-state trip device is naturally identical to that described above with a standard trip device. In both cases, the high-speed operation of the overpressure actuator allows a small time delay of the trip device on a fault, this time delay being able to be obtained by a simple clearance between the electromagnetic trip device and the trip bar, or between the polarized relay 34 and this trip bar 23. Any other delay means, for example of the runner type '.
can be used.
The curves in figure 5 show the mode of action of the trip device according to the invention. Curve "a" shows the separation distance of the contacts 11, 12, on opening on a short-circuit by electrodynamic repulsion of the movable contact 12. Curve "b" shows the variation of the arc voltage corresponding to opening of the contacts 11, 12. Curve "c"
illustrates the increase of the presumed short-circuit current, whereas curve "d" corresponds to the current limited by the electrodynamic repulsion of the contacts 11, 12. Curve "e" shows the pressure variation in the arc extinguishing chamber 13.
Separation of the contacts 11, 12 takes place at a time "tl" and the overpressure actuator causes opening of the machanism 19, and thereby that of the three poles of the circuit,breaker at a time "t2" confirming opening of the contacts by electrodynamic repulsion. A piston 26, with a diameter of lOmm, has enabled amply sufficient forces to be obtained to actuate the trip bar 23. A piston of this size can easily be housed i.n the molded case 10, and the duct 31 of small cross-section enables the pressure to be picked up at any point of the arc extinguishing chamber 13. The usual leaktightness of the arc extinguishing chambers 13 is amply sufficient to obtain the necessary overpressures, and it. is not necessary to provide additional leaktightness means of these chambers. The assembly is particularly simple and selectivity is obtained by using return springs 29 of suitable size.
;.
In figure 1, a pole of a molded case circuit breaker 10 comprises a pair of ,contacts 11, 12 located in an arc extinguishing chamber 13 equipped with deionization plates 14.
The arc extinguishing chamber 13 is bounded by partitions 15 one of which has passing through it a support arm 16 of the movable contact 12. The arc extinguishing chamber 13 is almost. leaktight and communicates by a channel 17 of small cross-section with the outside of the molded case 10. The movable contact arm 16 is pivotally mounted on a bar 18 belonging to an operating mechanism 19, having a manual opening and closing handle 20 of the contacts 11, 12 and a latch 21 controling tripping of the mechanism 19. The movable contact 12 is biased by a spring 22 to the closed position, and is capable of pivoting counterclockwise due to the electrodynamic repulsion force generated by the current flowing in the contact arm 16 and contacts 11, 12..The latch 21 is controled by a trip bar 23 common to the different poles of the circuit breaker. The circuit breaker comprises a standard trip device with a bimetal strip 24, and electro-magnet9.e coil 25, both acting on the trip bar 23. A circuit breaker of this kind is well-known to those specialized in the art and does not need to be described in greater detail here. It is sufficient to recall that when- a short-circuit occurs, repulsion of the contacts 11, 12 brings about high-speed opening of these contacts, against the force of the spring 22, this high-speed opening causing limitation of the short-circuit current. Opening of the contacts 11. 12 is confirmed by the operation of the electromagnetic trip device 25 acting via the trip bar 23 on the latch 21, which opens the circuit breaker mechanism 19.
According to the present invention, the circuit breaker comprises an overpressure actuator comprising a piston 26 and cylinder 27 assembly cooperating with the trip bar 23. Referring more particularly to figure 2, it can be seen that the piston 26 slidingly mounted in the cylinder 27 bears a rod 28 capable of striking the trip bar 23. A return spring 29.keeps the piston 26 in the retracted position,' represented in figure 2. The face opposite the rod 28 of the piston 26 is subjected to the pressure in 'the chamber 30 which communicates via a duct 31 with the arc extinguishing chamber 13. In the example represented iri figure 1, the duct 31 opens onto the chamber 13 in the vicinity of the deionisation plates 14, but pressurization can be performed at any point of the chamber 13, uniformization of the pressure inside this chamber being almost instantaneous.
Operation of the circuit breaker according to the invention is derived from the above description. When the contacts 11, 12 open on a short-circuit, the arc drawn between these contacts produces heating of the gas contained in the arc extinguishing chamber 13 and consequently a pressure increase, as a direct function of the energy of the arc. This pressure increase is transmitted by the duct 31 to the chamber 30, and as soon as this overpressure overrides the force of the return spring 29, causes the piston 26 to slide to the left and actuation of the trip bar 23 causing the mechanism 19 to open, confirming the separation of the contacts. Detection of a strong current arc is extremely fast, whereas the overpressure actuator 26, 27 hardly operates for a normal break or a weak current, the overpressure generated in the arc extinguishing chamber 13 being insufficient to overcome the force of the return spring 29. This same spring 29 enables selectivity to be achieved between two circuit breakers of different ratings having the same short-circuit current flowing through them as the pressure developed will be less great than if it had broken on its own.
The circuit breaker can be multipole and in this case each pole can be equipped with its own overpressure actuator 26, 27 acting on the trip bar 23. When a short-circuit occurs, the most loaded . 7..
pole causes tripping by the pressure increase in its arc extinguishinc7 chamber 13,,this trip causing all the poles of the circuit breaker to open.
According to a preferred embodiment, illustrated by figure 3.
three poles P1, P2, P3 of a three-pole circuit breaker communicate via ducts 31 with a manifold 32, itself connected to the chamber 30 of the overpressure actuator 26, 27. The orifice via which the ducts 31 enter the manifold 32 is capable of being blocked off by a check valve 33, preventing the gases from flowing from one pole to the other. In the example represented in figure 3, the pressure increase in the arc extinguishing chamber of the first pole P1 is the quickest, and this pressure is 'transmitted via the duct 31 and manifold 32 to the overpressure actuator 26, 27, the valve 33 being open. The other two poles P2, P3 are isolated from 'the manifold 32 by closing of their corresponding valve 33, and the actuating device remains almost leaktight.
The invention is applicable to circuit breakers with solid-state trip devices using current transformers to detect an overload or short-circuit. These current transformers supply a signal to an electronic processing device which delivers a tripping order to a polarized relay 34 when preset thresholds are exceeded.
Referring to figure 4, it can be seen that the polarized relay 34 comprises a plunger core 35 held in the retracted position by a permanent magnet 36, and biased to the operating position of the trip bar 23, by means of a push-rod 38, by a spring 37. The tripping ~ order is transmitted to a 'coil 39 which releases the core 35. The overpressure actuator 26, 27 is adjacent to the polarized relay 34 and the rod 28 is located facing the trip bar 23 to actuate the latter when an overpressure occurs. The trip bar 23 bears a lug 40, capable of cooperating with the rear face of the head of the push-rod 38, leaving a clearance "j", sufficient for movement of the trip bar 23 due to the action of the overpressure actuator 26, 27, without the core 35 of the relay 34 moving.~This lug 40 causes discharging of the polarized relay 34 after the mechanism 19 has tripped.
Operation of the circuit breaker with solid-state trip device is naturally identical to that described above with a standard trip device. In both cases, the high-speed operation of the overpressure actuator allows a small time delay of the trip device on a fault, this time delay being able to be obtained by a simple clearance between the electromagnetic trip device and the trip bar, or between the polarized relay 34 and this trip bar 23. Any other delay means, for example of the runner type '.
can be used.
The curves in figure 5 show the mode of action of the trip device according to the invention. Curve "a" shows the separation distance of the contacts 11, 12, on opening on a short-circuit by electrodynamic repulsion of the movable contact 12. Curve "b" shows the variation of the arc voltage corresponding to opening of the contacts 11, 12. Curve "c"
illustrates the increase of the presumed short-circuit current, whereas curve "d" corresponds to the current limited by the electrodynamic repulsion of the contacts 11, 12. Curve "e" shows the pressure variation in the arc extinguishing chamber 13.
Separation of the contacts 11, 12 takes place at a time "tl" and the overpressure actuator causes opening of the machanism 19, and thereby that of the three poles of the circuit,breaker at a time "t2" confirming opening of the contacts by electrodynamic repulsion. A piston 26, with a diameter of lOmm, has enabled amply sufficient forces to be obtained to actuate the trip bar 23. A piston of this size can easily be housed i.n the molded case 10, and the duct 31 of small cross-section enables the pressure to be picked up at any point of the arc extinguishing chamber 13. The usual leaktightness of the arc extinguishing chambers 13 is amply sufficient to obtain the necessary overpressures, and it. is not necessary to provide additional leaktightness means of these chambers. The assembly is particularly simple and selectivity is obtained by using return springs 29 of suitable size.
;.
Claims (7)
1. An electrical circuit breaker comprising a molded case, having an arc extinguishing chamber, a pair of contacts housed in said arc extinguishing chamber, elastic means urging the contacts to the closed position, said contacts being capable of separating due to the action of electrodynamic repulsion forces when the current flowing through the contacts exceeds a preset threshold to generate limitation of said current, an opening and closing operating mechanism of said contacts, an overload and/or short-circuit fault trip device which actuates said operating mechanism, and an actuating device formed by a leaktight assembly having a duct communicating with said arc extinguishing chamber and a part reacting to the pressure transmitted by said duct arid actuating said operating mechanism when said pressure exceeds a preset threshold.
2. The electrical circuit breaker according to claim 1, having deionization plates and wherein said arc extinguishing chamber is partially leaktight and contains said pair of contacts and said plates.
3. The circuit breaker according to claim 1, wherein said actuator comprises a movable part such as a piston or membrane subjected to said pressure, and a weighted return device acting on said movable part, whose movement causes said circuit breaker opening mechanism to be actuated, said weighted return device being arranged to avoid spurious actuation on a simple overload or when a short-circuit occurs broken by another circuit breaker.
4. A multipole circuit breaker according to claim 1, wherein each pole cooperates with an actuating device to bring about opening of the multipole circuit breaker when the pressure in any one of said poles exceeds said threshold.
5. The circuit breaker according to claim 4, wherein the actuating device comprises a movable part subjected to said pressure and common to all the poles and ducts equipped with an anti-return device connecting said movable part to the arc extinguishing chamber of each pole.
6. The circuit breaker according to claim 5, having a manifold common to all the poles and communicating with the arc extinguishing chamber of each of the poles via ducts equipped with check valves, said movable part being connected to said manifold.
7. The circuit breaker according to claim 1, wherein said fault trip device comprises a thermal element and/or an electro-magnetic element through which the current flows and a trip bar on which said elements and said actuating device act, the action of the fault trip device being time delayed with respect to that of the actuating device so as to provide selectivity of tripping.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9005870A FR2661776B1 (en) | 1990-05-04 | 1990-05-04 | INSTANT TRIGGER OF A CIRCUIT BREAKER. |
| FR9005870 | 1990-05-04 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2040863A1 CA2040863A1 (en) | 1991-11-05 |
| CA2040863C true CA2040863C (en) | 2000-06-13 |
Family
ID=9396495
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002040863A Expired - Fee Related CA2040863C (en) | 1990-05-04 | 1991-04-19 | Instantaneous trip device of a circuit breaker |
Country Status (13)
| Country | Link |
|---|---|
| US (1) | US5103198A (en) |
| EP (1) | EP0455564B1 (en) |
| JP (1) | JP3004387B2 (en) |
| CN (1) | CN1047256C (en) |
| BR (1) | BR9101760A (en) |
| CA (1) | CA2040863C (en) |
| DE (1) | DE69110540T2 (en) |
| ES (1) | ES2075948T3 (en) |
| FR (1) | FR2661776B1 (en) |
| HK (1) | HK1006890A1 (en) |
| PT (1) | PT97556B (en) |
| TW (1) | TW208756B (en) |
| ZA (1) | ZA913343B (en) |
Families Citing this family (135)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH052962A (en) * | 1991-06-20 | 1993-01-08 | Fuji Electric Co Ltd | Dust shield device for electromagnetic contactor |
| FR2682530B1 (en) * | 1991-10-15 | 1993-11-26 | Merlin Gerin | RANGE OF LOW VOLTAGE CIRCUIT BREAKERS WITH MOLDED HOUSING. |
| DE19522603A1 (en) * | 1995-06-19 | 1997-01-09 | Siemens Ag | Protective device against overloading the switching contacts of a switching device |
| DE19526592C2 (en) * | 1995-07-21 | 1999-04-15 | Abb Patent Gmbh | Electrical switch, in particular circuit breaker |
| US5866996A (en) * | 1996-12-19 | 1999-02-02 | Siemens Energy & Automation, Inc. | Contact arm with internal in-line spring |
| US6087914A (en) * | 1996-12-19 | 2000-07-11 | Siemens Energy & Automation, Inc. | Circuit breaker combination thermal and magnetic trip actuator |
| US5894260A (en) * | 1996-12-19 | 1999-04-13 | Siemens Energy & Automation, Inc. | Thermal sensing bi-metal trip actuator for a circuit breaker |
| US5844188A (en) * | 1996-12-19 | 1998-12-01 | Siemens Energy & Automation, Inc. | Circuit breaker with improved trip mechanism |
| IT1292453B1 (en) | 1997-07-02 | 1999-02-08 | Aeg Niederspannungstech Gmbh | ROTATING GROUP OF CONTACTS FOR HIGH FLOW SWITCHES |
| DE19750875C1 (en) * | 1997-11-18 | 1999-03-18 | Hans Arnhold | Overcurrent release for protection switch |
| DE19819242B4 (en) | 1998-04-29 | 2005-11-10 | Ge Power Controls Polska Sp.Z.O.O. | Thermomagnetic circuit breaker |
| US6114641A (en) * | 1998-05-29 | 2000-09-05 | General Electric Company | Rotary contact assembly for high ampere-rated circuit breakers |
| DE19847155A1 (en) * | 1998-10-13 | 2000-04-20 | Kopp Heinrich Ag | Overcurrent trip device for circuit breakers, has heat conducting tubular body wound with coil, and with stop end and opposite expanded end for mounting and radial support of bimetallic spring plate |
| US6087913A (en) * | 1998-11-20 | 2000-07-11 | General Electric Company | Circuit breaker mechanism for a rotary contact system |
| US6037555A (en) * | 1999-01-05 | 2000-03-14 | General Electric Company | Rotary contact circuit breaker venting arrangement including current transformer |
| US6166344A (en) * | 1999-03-23 | 2000-12-26 | General Electric Company | Circuit breaker handle block |
| US6262872B1 (en) | 1999-06-03 | 2001-07-17 | General Electric Company | Electronic trip unit with user-adjustable sensitivity to current spikes |
| US6268991B1 (en) | 1999-06-25 | 2001-07-31 | General Electric Company | Method and arrangement for customizing electronic circuit interrupters |
| US6218917B1 (en) | 1999-07-02 | 2001-04-17 | General Electric Company | Method and arrangement for calibration of circuit breaker thermal trip unit |
| US6188036B1 (en) | 1999-08-03 | 2001-02-13 | General Electric Company | Bottom vented circuit breaker capable of top down assembly onto equipment |
| US6710988B1 (en) | 1999-08-17 | 2004-03-23 | General Electric Company | Small-sized industrial rated electric motor starter switch unit |
| US6252365B1 (en) | 1999-08-17 | 2001-06-26 | General Electric Company | Breaker/starter with auto-configurable trip unit |
| US6396369B1 (en) | 1999-08-27 | 2002-05-28 | General Electric Company | Rotary contact assembly for high ampere-rated circuit breakers |
| US6175288B1 (en) | 1999-08-27 | 2001-01-16 | General Electric Company | Supplemental trip unit for rotary circuit interrupters |
| US6232570B1 (en) | 1999-09-16 | 2001-05-15 | General Electric Company | Arcing contact arrangement |
| US6326869B1 (en) | 1999-09-23 | 2001-12-04 | General Electric Company | Clapper armature system for a circuit breaker |
| US6239395B1 (en) | 1999-10-14 | 2001-05-29 | General Electric Company | Auxiliary position switch assembly for a circuit breaker |
| US6229413B1 (en) | 1999-10-19 | 2001-05-08 | General Electric Company | Support of stationary conductors for a circuit breaker |
| US6317018B1 (en) | 1999-10-26 | 2001-11-13 | General Electric Company | Circuit breaker mechanism |
| US6232856B1 (en) | 1999-11-02 | 2001-05-15 | General Electric Company | Magnetic shunt assembly |
| EP1098343B1 (en) | 1999-11-03 | 2005-09-21 | AEG Niederspannungstechnik GmbH & Co. KG | Circuit breaker rotary contact arm arrangement |
| US6377144B1 (en) | 1999-11-03 | 2002-04-23 | General Electric Company | Molded case circuit breaker base and mid-cover assembly |
| US6300586B1 (en) | 1999-12-09 | 2001-10-09 | General Electric Company | Arc runner retaining feature |
| US6310307B1 (en) | 1999-12-17 | 2001-10-30 | General Electric Company | Circuit breaker rotary contact arm arrangement |
| US6172584B1 (en) | 1999-12-20 | 2001-01-09 | General Electric Company | Circuit breaker accessory reset system |
| US6184761B1 (en) | 1999-12-20 | 2001-02-06 | General Electric Company | Circuit breaker rotary contact arrangement |
| US6215379B1 (en) | 1999-12-23 | 2001-04-10 | General Electric Company | Shunt for indirectly heated bimetallic strip |
| US6281461B1 (en) | 1999-12-27 | 2001-08-28 | General Electric Company | Circuit breaker rotor assembly having arc prevention structure |
| US6346869B1 (en) | 1999-12-28 | 2002-02-12 | General Electric Company | Rating plug for circuit breakers |
| US6211758B1 (en) | 2000-01-11 | 2001-04-03 | General Electric Company | Circuit breaker accessory gap control mechanism |
| US6239677B1 (en) | 2000-02-10 | 2001-05-29 | General Electric Company | Circuit breaker thermal magnetic trip unit |
| US6429759B1 (en) | 2000-02-14 | 2002-08-06 | General Electric Company | Split and angled contacts |
| US6313425B1 (en) | 2000-02-24 | 2001-11-06 | General Electric Company | Cassette assembly with rejection features |
| US6281458B1 (en) | 2000-02-24 | 2001-08-28 | General Electric Company | Circuit breaker auxiliary magnetic trip unit with pressure sensitive release |
| US6204743B1 (en) | 2000-02-29 | 2001-03-20 | General Electric Company | Dual connector strap for a rotary contact circuit breaker |
| US6404314B1 (en) | 2000-02-29 | 2002-06-11 | General Electric Company | Adjustable trip solenoid |
| US6379196B1 (en) | 2000-03-01 | 2002-04-30 | General Electric Company | Terminal connector for a circuit breaker |
| US6340925B1 (en) | 2000-03-01 | 2002-01-22 | General Electric Company | Circuit breaker mechanism tripping cam |
| US6346868B1 (en) | 2000-03-01 | 2002-02-12 | General Electric Company | Circuit interrupter operating mechanism |
| US6448521B1 (en) | 2000-03-01 | 2002-09-10 | General Electric Company | Blocking apparatus for circuit breaker contact structure |
| US6366438B1 (en) | 2000-03-06 | 2002-04-02 | General Electric Company | Circuit interrupter rotary contact arm |
| US6211757B1 (en) | 2000-03-06 | 2001-04-03 | General Electric Company | Fast acting high force trip actuator |
| US6459349B1 (en) | 2000-03-06 | 2002-10-01 | General Electric Company | Circuit breaker comprising a current transformer with a partial air gap |
| US6496347B1 (en) | 2000-03-08 | 2002-12-17 | General Electric Company | System and method for optimization of a circuit breaker mechanism |
| US6429659B1 (en) | 2000-03-09 | 2002-08-06 | General Electric Company | Connection tester for an electronic trip unit |
| US6403909B1 (en) | 2000-03-13 | 2002-06-11 | General Electric Company | Trip override for rotary breaker |
| US6366188B1 (en) | 2000-03-15 | 2002-04-02 | General Electric Company | Accessory and recess identification system for circuit breakers |
| US6218919B1 (en) | 2000-03-15 | 2001-04-17 | General Electric Company | Circuit breaker latch mechanism with decreased trip time |
| US6232859B1 (en) | 2000-03-15 | 2001-05-15 | General Electric Company | Auxiliary switch mounting configuration for use in a molded case circuit breaker |
| US6421217B1 (en) | 2000-03-16 | 2002-07-16 | General Electric Company | Circuit breaker accessory reset system |
| US6459059B1 (en) | 2000-03-16 | 2002-10-01 | General Electric Company | Return spring for a circuit interrupter operating mechanism |
| US6476698B1 (en) | 2000-03-17 | 2002-11-05 | General Electric Company | Convertible locking arrangement on breakers |
| US6388213B1 (en) | 2000-03-17 | 2002-05-14 | General Electric Company | Locking device for molded case circuit breakers |
| DE10013099B4 (en) * | 2000-03-17 | 2004-08-26 | Aeg Niederspannungstechnik Gmbh & Co Kg | Tripping device for a circuit breaker |
| US6472620B2 (en) | 2000-03-17 | 2002-10-29 | Ge Power Controls France Sas | Locking arrangement for circuit breaker draw-out mechanism |
| FR2806548B1 (en) | 2000-03-17 | 2002-08-23 | Ge Power Controls France | EXTRACTABLE MECHANISM FOR CIRCUIT BREAKERS |
| US6639168B1 (en) | 2000-03-17 | 2003-10-28 | General Electric Company | Energy absorbing contact arm stop |
| US6373010B1 (en) | 2000-03-17 | 2002-04-16 | General Electric Company | Adjustable energy storage mechanism for a circuit breaker motor operator |
| US6586693B2 (en) | 2000-03-17 | 2003-07-01 | General Electric Company | Self compensating latch arrangement |
| US6479774B1 (en) | 2000-03-17 | 2002-11-12 | General Electric Company | High energy closing mechanism for circuit breakers |
| US6559743B2 (en) | 2000-03-17 | 2003-05-06 | General Electric Company | Stored energy system for breaker operating mechanism |
| US6747535B2 (en) | 2000-03-27 | 2004-06-08 | General Electric Company | Precision location system between actuator accessory and mechanism |
| US6995640B2 (en) * | 2000-05-16 | 2006-02-07 | General Electric Company | Pressure sensitive trip mechanism for circuit breakers |
| US6373357B1 (en) | 2000-05-16 | 2002-04-16 | General Electric Company | Pressure sensitive trip mechanism for a rotary breaker |
| US6232860B1 (en) | 2000-06-23 | 2001-05-15 | General Electric Company | Armature for latching a circuit breaker trip unit |
| US6400245B1 (en) | 2000-10-13 | 2002-06-04 | General Electric Company | Draw out interlock for circuit breakers |
| US6806800B1 (en) | 2000-10-19 | 2004-10-19 | General Electric Company | Assembly for mounting a motor operator on a circuit breaker |
| US6429760B1 (en) | 2000-10-19 | 2002-08-06 | General Electric Company | Cross bar for a conductor in a rotary breaker |
| US6531941B1 (en) | 2000-10-19 | 2003-03-11 | General Electric Company | Clip for a conductor in a rotary breaker |
| US6362711B1 (en) | 2000-11-10 | 2002-03-26 | General Electric Company | Circuit breaker cover with screw locating feature |
| US6380829B1 (en) | 2000-11-21 | 2002-04-30 | General Electric Company | Motor operator interlock and method for circuit breakers |
| US6448522B1 (en) | 2001-01-30 | 2002-09-10 | General Electric Company | Compact high speed motor operator for a circuit breaker |
| US6476337B2 (en) | 2001-02-26 | 2002-11-05 | General Electric Company | Auxiliary switch actuation arrangement |
| US6882258B2 (en) * | 2001-02-27 | 2005-04-19 | General Electric Company | Mechanical bell alarm assembly for a circuit breaker |
| US6678135B2 (en) | 2001-09-12 | 2004-01-13 | General Electric Company | Module plug for an electronic trip unit |
| US6469882B1 (en) | 2001-10-31 | 2002-10-22 | General Electric Company | Current transformer initial condition correction |
| US6804101B2 (en) | 2001-11-06 | 2004-10-12 | General Electric Company | Digital rating plug for electronic trip unit in circuit breakers |
| RU2294575C2 (en) * | 2002-09-12 | 2007-02-27 | Чжецзианг Чинт Электрикс Ко., Лтд. | Low voltage circuit interrupter with fast disabling function |
| FR2844915B1 (en) * | 2002-09-19 | 2005-05-06 | Schneider Electric Ind Sa | TRIGGER DEVICE FOR ELECTRICAL DEVICE SWITCH |
| US6750743B1 (en) * | 2003-05-13 | 2004-06-15 | General Electric Company | Integrated thermal and magnetic trip unit |
| KR100616084B1 (en) * | 2004-10-07 | 2006-08-25 | 엘에스산전 주식회사 | Pressure trip device of the circuit breaker |
| ITMI20042234A1 (en) * | 2004-11-19 | 2005-02-19 | Abb Service Srl | AUTOMATIC SWITCH WITH RELEASE KINEMATISM USED BY MOBILE CONTACT |
| DE102006027140A1 (en) | 2006-06-12 | 2007-12-13 | Ellenberger & Poensgen Gmbh | breaker |
| DE102008005101A1 (en) | 2008-01-16 | 2009-07-23 | Siemens Aktiengesellschaft | Switching device, in particular power switching device |
| JP5149667B2 (en) * | 2008-03-26 | 2013-02-20 | パナソニックエコソリューションズ電路株式会社 | Contact device |
| DE102008049554A1 (en) | 2008-09-30 | 2010-04-01 | Siemens Aktiengesellschaft | Electrical switch, particularly circuit-breaker in low-voltage range for disconnecting flow paths in case of short-circuit or over-current, has two switch contacts for disconnecting flow path |
| DE102008049998A1 (en) | 2008-09-30 | 2010-04-01 | Siemens Aktiengesellschaft | Electrical switch e.g. molded case circuit breaker, for breaking current path during e.g. short-circuit, has wall with section formed such that strength of section against external pressure is smaller than strength against internal pressure |
| DE102009010229A1 (en) | 2009-02-24 | 2010-08-26 | Siemens Aktiengesellschaft | Tripping device for electrical switching arrangement, has switch, which is operated by pressure, where electrical signal of converter is provided with operating element |
| DE102009010227A1 (en) | 2009-02-24 | 2010-08-26 | Siemens Aktiengesellschaft | Tripping device e.g. energy tripping device, has switch that exhibits pressure transducer with electrical output, where electrical output emits electrical signal that is proportional to pressure for operating switching mechanism |
| DE102009010900A1 (en) | 2009-02-27 | 2010-09-02 | Siemens Aktiengesellschaft | Actuator for electrical switching arrangement, has flow path arranged in Bowden cable, where two switching contacts are separated, when current flowing through switching contacts has exceeded certain threshold |
| DE102009015222A1 (en) | 2009-03-31 | 2010-10-07 | Siemens Aktiengesellschaft | Tripping device e.g. pressure detecting unit, for electrical switching arrangement e.g. individual electrical switchgear, has movable element forming channel section of flow channel, where channel section is guided outward by housing |
| DE102009015126A1 (en) * | 2009-03-31 | 2010-10-14 | Siemens Aktiengesellschaft | Trigger for an electrical switching arrangement |
| CN101604601B (en) * | 2009-06-05 | 2012-10-03 | 上海诺雅克电气有限公司 | Quick trip breaker with function of pneumatic actuation trip |
| FI122546B (en) | 2010-10-28 | 2012-03-15 | Metso Paper Inc | Headbox |
| US8471655B2 (en) | 2011-01-05 | 2013-06-25 | Schneider Electric USA, Inc. | Piston trip reset lever |
| DE102011075727A1 (en) | 2011-05-12 | 2012-11-15 | Siemens Aktiengesellschaft | Device for triggering an electrical switch |
| DE102011077359A1 (en) * | 2011-06-10 | 2012-12-13 | Siemens Aktiengesellschaft | Trigger for an electrical switching arrangement |
| EP2544207B1 (en) * | 2011-07-05 | 2017-03-29 | Siemens Aktiengesellschaft | Short circuit trigger with optimised coil connection |
| CN103021750B (en) * | 2011-09-22 | 2015-11-18 | 上海电器股份有限公司人民电器厂 | With the low-voltage circuit breaker of pneumatic trip gear |
| US8698024B2 (en) | 2011-11-18 | 2014-04-15 | Schneider Electric USA, Inc. | Pressure sensitive trip mechanism with debris control |
| JP5872260B2 (en) * | 2011-11-22 | 2016-03-01 | 株式会社東芝 | Gas insulation device for electric power and its manufacturing method |
| US8471657B1 (en) * | 2011-12-06 | 2013-06-25 | Eaton Corporation | Trip mechanism and electrical switching apparatus including a trip member pushed by pressure arising from an arc in an arc chamber |
| CN103094014B (en) * | 2013-01-21 | 2015-07-01 | 贵州长征开关制造有限公司 | Pneumatic and electromagnet integrated protection device used for circuit breaker |
| DE102014107265B4 (en) * | 2014-05-22 | 2020-01-02 | Eaton Intelligent Power Limited | switchgear |
| FR3029350B1 (en) | 2014-12-01 | 2016-12-23 | Hager-Electro Sas | DEVICE FOR DIFFERENTIAL PROTECTION |
| CN105185669A (en) * | 2015-10-16 | 2015-12-23 | 江苏大全凯帆电器股份有限公司 | Circuit breaker gas protection device |
| US9865418B2 (en) * | 2015-12-08 | 2018-01-09 | Siemens Industry, Inc. | Circuit breakers, arc expansion chambers, and operating methods |
| CN105533970B (en) * | 2015-12-16 | 2017-07-07 | 杭州特保物业管理有限公司 | The shellproof bag of folded |
| CN105569383B (en) * | 2015-12-22 | 2018-04-27 | 浙江工业大学义乌科学技术研究院有限公司 | Motor wire connects reliable revolving stage |
| DK3206219T3 (en) * | 2016-02-10 | 2019-08-12 | Abb Spa | SWITCHING EQUIPMENT FOR ELECTRIC LOW VOLTAGE INSTALLATIONS |
| CN106024535A (en) * | 2016-07-29 | 2016-10-12 | 李聪 | Low-voltage circuit breaker |
| FR3055420B1 (en) * | 2016-08-31 | 2018-09-28 | Schneider Electric Industries Sas | CONTROL UNIT OF AN ELECTRIC CIRCUIT BREAKER AND CIRCUIT BREAKER COMPRISING SUCH A CONTROL UNIT |
| FR3063174B1 (en) * | 2017-02-22 | 2019-04-19 | Schneider Electric Industries Sas | APPARATUS FOR CUTTING AN ELECTRICAL CURRENT WITH SEPARABLE ELECTRICAL CONTACTS AND CUTTING IN THE AIR |
| KR102349751B1 (en) * | 2017-03-21 | 2022-01-11 | 엘에스일렉트릭(주) | Circuit breaker with single pole switching unit |
| KR101901618B1 (en) * | 2017-03-27 | 2018-09-27 | 엘에스산전 주식회사 | Circuit breakers |
| DE102018211995B4 (en) | 2017-08-01 | 2020-12-10 | Siemens Aktiengesellschaft | Push button for an electrical switch and electrical switch with such a push button |
| EP3439005A1 (en) | 2017-08-01 | 2019-02-06 | Siemens Aktiengesellschaft | Pressure trigger for an electric switch and electric switch with such a pressure trigger |
| US10535484B2 (en) * | 2017-11-29 | 2020-01-14 | Schneider Electric USA, Inc. | Noncontact solenoid for miniature circuit breakers with a movable frame and magnetic coupling |
| DE102017131442B4 (en) * | 2017-12-29 | 2023-11-23 | Eaton Electrical Ip Gmbh & Co. Kg | Single-pole or multi-pole circuit breaker and modular system comprising such a circuit breaker |
| EP3557597B1 (en) | 2018-04-20 | 2024-01-17 | ABB S.p.A. | Low-voltage circuit breaker |
| TWI686833B (en) * | 2018-12-12 | 2020-03-01 | 陳錫瑜 | High-voltage circuit breaker with self-powered tripping |
| DE102019220433B4 (en) * | 2019-12-20 | 2022-03-31 | Siemens Aktiengesellschaft | Reset element and electric switch with such a reset element |
| CN112635265B (en) * | 2021-01-08 | 2022-02-15 | 南通理工学院 | Quick tripping high-voltage circuit breaker for fire early warning system |
| CN115172109A (en) | 2021-04-01 | 2022-10-11 | 上海正泰智能科技有限公司 | Quick tripping device and circuit breaker |
| CN115621091A (en) | 2021-07-15 | 2023-01-17 | 上海正泰智能科技有限公司 | Quick tripping device of circuit breaker and circuit breaker |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3631369A (en) * | 1970-04-27 | 1971-12-28 | Ite Imperial Corp | Blowoff means for circuit breaker latch |
| FR2452175A1 (en) * | 1979-03-23 | 1980-10-17 | Alsthom Unelec Sa | ELECTRICAL AIR CUT-OFF APPARATUS PROVIDED WITH A SHORT-CIRCUIT INDICATOR DEVICE |
| FR2621748B1 (en) * | 1987-10-09 | 1996-07-05 | Merlin Gerin | STATIC TRIGGER OF A MOLDED CASE CIRCUIT BREAKER |
-
1990
- 1990-05-04 FR FR9005870A patent/FR2661776B1/en not_active Expired - Fee Related
-
1991
- 1991-04-15 ES ES91420127T patent/ES2075948T3/en not_active Expired - Lifetime
- 1991-04-15 DE DE69110540T patent/DE69110540T2/en not_active Expired - Fee Related
- 1991-04-15 EP EP91420127A patent/EP0455564B1/en not_active Expired - Lifetime
- 1991-04-16 US US07/685,634 patent/US5103198A/en not_active Expired - Lifetime
- 1991-04-19 CA CA002040863A patent/CA2040863C/en not_active Expired - Fee Related
- 1991-04-26 JP JP3124979A patent/JP3004387B2/en not_active Expired - Fee Related
- 1991-04-30 BR BR919101760A patent/BR9101760A/en not_active IP Right Cessation
- 1991-05-03 CN CN91102771A patent/CN1047256C/en not_active Expired - Fee Related
- 1991-05-03 ZA ZA913343A patent/ZA913343B/en unknown
- 1991-05-03 PT PT97556A patent/PT97556B/en not_active IP Right Cessation
- 1991-10-07 TW TW080107883A patent/TW208756B/zh active
-
1998
- 1998-06-22 HK HK98105884A patent/HK1006890A1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| CA2040863A1 (en) | 1991-11-05 |
| BR9101760A (en) | 1991-12-17 |
| PT97556B (en) | 1999-04-30 |
| HK1006890A1 (en) | 1999-03-19 |
| CN1056374A (en) | 1991-11-20 |
| ES2075948T3 (en) | 1995-10-16 |
| TW208756B (en) | 1993-07-01 |
| JPH04229524A (en) | 1992-08-19 |
| PT97556A (en) | 1993-05-31 |
| JP3004387B2 (en) | 2000-01-31 |
| EP0455564B1 (en) | 1995-06-21 |
| ZA913343B (en) | 1992-02-26 |
| DE69110540D1 (en) | 1995-07-27 |
| CN1047256C (en) | 1999-12-08 |
| DE69110540T2 (en) | 1996-02-29 |
| US5103198A (en) | 1992-04-07 |
| FR2661776A1 (en) | 1991-11-08 |
| FR2661776B1 (en) | 1996-05-10 |
| EP0455564A1 (en) | 1991-11-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2040863C (en) | Instantaneous trip device of a circuit breaker | |
| CA1086361A (en) | Anti-rebound latch for current limiting switches | |
| US3631369A (en) | Blowoff means for circuit breaker latch | |
| AU592782B2 (en) | Low voltage circuit breaker with remote switching function | |
| US8063334B2 (en) | Switching device, in particular power switching device | |
| CA1252192A (en) | Shunt effect low-voltage circuit-breaker | |
| CA1070360A (en) | Circuit breaker with thermal and magnetic trip means | |
| JPH0338694B2 (en) | ||
| AU2010201535A1 (en) | Test assembly for a circuit breaker | |
| KR100191480B1 (en) | Circuit breaker | |
| CA1144214A (en) | Circuit interrupter trip unit | |
| CA1073021A (en) | Multipole circuit breaker with contact arms individually biased by torsion springs | |
| GB2034119A (en) | Circuit interrupter with high speed magnetic trip device | |
| GB1592291A (en) | Circuit breaker with latch mechanism | |
| US4129843A (en) | Magnetic trip means for circuit breaker | |
| CN109994346B (en) | Single-pole or multi-pole circuit breaker and modular system | |
| JPH01176621A (en) | Overcurrent trip gear of circuit breaker | |
| EP3671799B1 (en) | Neutral circuit breaker having a double break and line side powered electronic board | |
| CA1101025A (en) | Current limiting circuit breaker | |
| US3158711A (en) | Current limiting circuit breaker | |
| EP0688464A1 (en) | Blade transfer runner and arc shunt for a double break circuit breaker | |
| US2709731A (en) | Circuit breaker | |
| US2700082A (en) | Circuit breaker | |
| CN110808197B (en) | Circuit breaker with multiple quick acting contacts | |
| CN109950104B (en) | Thermomagnetic trip assembly and electrical switch unit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |