US3622728A - High-voltage circuit breaking devices, notably for a shielded-type prefabricated electric station - Google Patents

High-voltage circuit breaking devices, notably for a shielded-type prefabricated electric station Download PDF

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US3622728A
US3622728A US10794A US3622728DA US3622728A US 3622728 A US3622728 A US 3622728A US 10794 A US10794 A US 10794A US 3622728D A US3622728D A US 3622728DA US 3622728 A US3622728 A US 3622728A
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Prior art keywords
contact
rods
rod
springs
lever
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US10794A
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English (en)
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Yves Bokshorn
Jean-Pierre H Boudiak
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COQ FRANCE
COQ-FRANCE
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COQ FRANCE
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
    • H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
    • H02B13/035—Gas-insulated switchgear
    • H02B13/075—Earthing arrangements
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B11/00—Switchgear having carriage withdrawable for isolation
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
    • H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing

Definitions

  • Vanderhye Attorney-Cushman, Darby & Cushman ABSTRACT Electric breaker device for high-voltage wiring system, which comprises a casing of electrically insulating material closed by a metal cover, a pair of movable contact rods per phase, adapted to be moved vertically by means ofa mechanism, said rods having their upper portions made of electrically insulating material or of an externally insulated conducting material and conducting lower portions, said conducting portions of said rods being interconnected by a conducting bridge, a pair of contact members each connected to a conductor, such as a cable head or bar, and adapted to be each connected to the other rod in one of their positions, and a ground circuit, characterized in that a third contact member connected to said ground circuit is disposed in the vicinity of the upper portion of said casing, said third contact member being electrically connected to one of said conductors, such as a cable head, through said conducting bridge and at least one of said rods in the grounding condition of the device.
  • the actuating mechanism includes two seper
  • charge-breaking switches are frequently used in conjunction with grounding sectionalizing switches the former for breaking the various circuits of the system and the latter for grounding the cable ends when the station unit is dead and it is desired to perform service of other operations on its cables.
  • This invention relates to a breaker device wherein neither auxiliary intervention intervention nor any change of position are required for converting the apparatus from its breaker function to its sectionalizing or grounding function, and vice versa.
  • the electric breaker device for high-voltage wiring system which comprises in a casing or vessel of electrically insulating material, closed by a metal cover, a pair of movable contact rods per phase, adapted to be moved vertically by means of a suitable mechanism, said rods having their upper portions made of a suitable electrically insulating material (or a conducting material lined externally with a suitable insulating material), and conducting lower portions, said conducting lower portions of said rods being interconnected by a conducting bridge, a pair of contact member each connected to a conductor (such as a cable heads or bar) and each adapted to be connected to one of said rods in one of their positions, and a ground circuit, is characterized essentially in that a third contact member connected to said ground circuit is provided in close vicinity of the upper portion of said casing and electrically connected to one of said conductors (cable heads) through said bridge and at least one of said rods in the grounding position of said device.
  • said conducting bridge comprises at least one through-contact adapted to slide along the conducting portion ofone ofsaid rods.
  • At least one of said rods can be separated both electrically and mechanically from said bridge.
  • one of said rods is replaced by a fully conducting grounding rod adapted to provide an electrical connection between said bridge and said ground circuit through said third contact member in the grounding position of the device.
  • said conducting bridge comprises a second through-contact permitting retracting of said second rod and the replacement thereof, in the grounding position of the device, by an insulated rod used for cable-testing purposes.
  • one of said rods is adapted on the one hand to be separated mechanically from said conducting bridge while preserving an electrical connection thereof, and on the other hand to be locked in relation to the metal cover of said casing.
  • the mechanical separation of said rod from said bridge and/or the locking of said rod in relation to said metal cover is or are obtained by simply rotating said rod about its axis.
  • said rod comprises a pair of studs projecting from two generatrices angularly spaced part, said studs being adapted, when said rod has been rotated through the good angle, to engage by turns a pair of fingers carried the one by said bridge and the other by the upper portion of said casing or vessel,
  • said rod actuating mechanism controlled by means of two separate members is characterized in that one of said control members operates both rods simultaneously and the other control member actuates only one of said rods.
  • said mechanism comprises a pair of springs (or groups of springs) one of said springs (or groups of springs) actuating one rod while the whole of said springs are adapted to move both rods simultaneously, the first spring or group of springs being tensioned and releasable by said first control member, and the whole of said springs are adapted to be tensioned and released by said second control member.
  • one of said control members consists of a first control ever provided with a handle disposed externally of the device and adapted to pivot about a fixed axis, another control lever being angularly rigid with said first lever and adapted to drive a finger engaging the studs rigid with one end of said springs to permit the stressing of all the springs in both sections of the mechanism when said first lever is moved from one to the other of its two extreme positions while holding the opposite ends of said springs by means of latches and allowing the springs to expand at the end of the stressing movement by releasing said latches through the inherent movement of said lever, whereby both rods are actuated simultaneously.
  • the second control member consists of a lever provided with a handle disposed externally of the breaking device and pivoted about a fixed axis (which may be the same as that of said first control member); another lever angularly rigid with said second lever is adapted to drive a finger engaging a stud rigid with the end of a spring and permits of stressing the setting spring of that section of the mechanism which is associated with only one of the contact rods when said second lever is moved from one to the other of its extreme positions while holding the other end of said spring by means of a latch and permitting the expansion of said spring at the end of the setting movement by releasing said latch by means of the inherent movement of said lever, so as to actuate one of the contact rods.
  • all the movements are obtained from a single spring or group of springs, the same spring or group or springs being adapted to actuate either a single section or both sections of the mechanism.
  • the mechanism comprises two control levers adapted to pivot about an axis, a first lever being provided with a cam contour adapted to engage with a coupling member adapted in turn to lock together the push members of said two rods and to actuate the lock bolt of a latch in order to release one of said pair of push members, the first lever further acting upon a link rigid with the spring stressing strap, a latch consisting of a lever fulcrumed about a fixed axis being adapted to hold the second push member at the end of the spring stressing movement, said latch being released during IOIOIO76 the spring stressing movement by the setting strap, thus permitting the downward stroke of the second push member and the coupling members of which a positioning stud runs along a fixed guide member and carries along the first push member.
  • a link solid with the spring stressing strap is pivoted to said second control lever.
  • clutch means are interposed in the kinematic chain between each control lever and the spring stressing strap.
  • FIG. I illustrates in vertical section a breaker device according to a first form of embodiment of this invention
  • FIG. 2 is a diagrammatic section of the device shown in FIG. I but converted into a sectionalizing grounding switch by means of a rod substitution in the open-circuit position, and
  • FIG. 3 is a similar diagram showing the closed position of the same member
  • FIG. 4 is a similar diagram showing the same device but in the case of a cable-testing operation
  • FIGS. 5 and 6 are diagrammatic sectional views showing a breaker device according to a second form of embodiment of this invention, in the open and closed positions, respectively, the transformation of the device into a sectionalizing grounding device taking place without any rod substitution;
  • FIGS. 7 and 8 are similar views of the same form of embodiment but converted into a sectionalizing grounding device
  • FIG. 9 is a diagrammatic elevational view of a three-phase breaker device according to a third form of embodiment of the invention.
  • FIG. I0 is a part-sectional diagram showing one phase of the device of the same third form of embodiment of the invention.
  • FIGS. 11, I2 and 13 are diagrammatic views showing, in the case of the same third form of embodiment of the invention.
  • FIGS. 14 and 15 illustrate diagrammatically, in the case of this third form of embodiment, the positions of the component elements of the device and of the second control member in the set and "closed" grounding sectionalizing-switch conditions, respectively;
  • FIGS. l6, l7 and 18 illustrate diagrammatically a fourth form of embodiment of the device wherein the component elements thereof and the first control member are in an open, set" and closed" conditions, respectively;
  • FIGS. I9 and 20 illustrate diagrammatically for this fourth form of embodiment, the positions of the component elements of the device and of the second control member thereof in the "set" and closed” conditions, respectively, and
  • FIG. 21 is a detail view showing the clutch means associated with one of the control levers.
  • the breaker device which is adapted to operate on the one hand as a device for breaking a high-voltage electric circuit and on the other hand as a grounding sectionalizing device, comprises an external casing characterized by a vessel 1 of electrically insulating material, filled with a suitable dielectric liquid substance 2 and closed at its top by a metal cover 3 (adapted on the other hand to constitute the base of a conventional mechanism, not shown).
  • the lower portion of this vessel I may be divided into two cups la and lb as described and illustrated in the copending patent application No. 10,792 filed Feb.
  • cups comprising each a transverse partition such as 10 through which extend a contact member 4 (or 5) provided with double plug-in contact means 4a, 4b (5a, 5b).
  • the upper contact means 40 and 5a are the breaking contacts of a breaker device and in the closed condition of this device they receive the ends of sliding rods 6 and 7 electrically interconnected through a conducting bridge piece 8.
  • the lower contact means 4b and 5b are likewise plug-in contacts adapted to be connected directly or indirectly to connecting conductors 9 and 10 (cable heads, set of bars, etc.
  • Another contact 14 connected to a ground circuit is provided at or near the upper portion of the vessel 1.
  • Each rod 6, 7 comprises an upper portion 6a (or 70) of electrically insulating material (or externally insulated conducting material) and a lower portion 6b (or 7b) of electrically conducting material; the conducting bridge 8 interconnecting said lower portions 6b and 717 also acts as a coupling yoke permitting the simultaneous translation of rods 6 and 7.
  • the breaker device comprises two poles per phase; it therefore affords a substantial reduction in the length of the opening stroke, due to the duality of rods 6 and 7.
  • the mode of operation is shown diagrammatically in FIGS. 2, 3 and 4, the yoke-bridge 8 actuated by an insulated rod II responsive to a conventional mechanism (not shown) comprises a pair of through contacts (of annular, segmental or other suitable and known configuration) resiliently engaging the conducting portions 6b, 7b of rods 6 and 7. It may also be noted that in this specific form of embodiment the presence of contacts of this character is justified by the fact that the rods 6 and 7 must be adapted to be separated from the bridge 8 in specific cases to be described presently.
  • FIG. I illustrates the breaker device in the position establishing a circuit between connecting conductors 9 and 10, such as 9, 4b, 4a, 6b, 8, 7b, 5a, 5b and 10.
  • the half-conducting, half-insulating rod 6 is replaced, as shown in FIG. 2, by a fully conducting rod 15 comprising two sections of different diameter, namely a section 15a of, greater diameter adapted to be clamped by contact 14 and a section 15b of smaller diameter adapted to slide through contact of bridge 8.
  • This assembly operates as follows: when the device is open (rods 6 and 7, bridge 8 in their upper positions), the rod 6 is removed and replaced by a rod 15 of the above-described type; then bridge 8 is grounded; the device is subsequently closed, rod 11 lowers the bridge 8 and also rods 7 and 15. Rod 7 is thus plugged in contact 5a (FIG. 3). Since rod 15 cannot reach contact 4, the ground circuit is obtained through elements I0, 5b, 5a, 7b, 12b, 8, 12a, 15b, 15a and 14.
  • the rod 7 can be removed and replaced by a cable-testing rod 16 so that the connection 10 can be tested, this connection leading for example to the cable head.
  • connection 9 connected for example to one of the bars constituting the set of bars of the device
  • connection 10 connected for instance to the cable head
  • the rods 6 and 7 are held or locked against movement in relation to the bridge 8 during the operation of the device.
  • This locking action may be obtained for example by using so-called bayonet coupling, rod 6 (or 7) carrying a stud l7 engaging a groove formed in an anchor member I3 rigid with bridge 8. It will be readily understood that it is only necessary to rotate the rods 6 and about their axes for locking or releasing them in relation to said bridge 8.
  • the grounding operation does not require a rod substitution as the same rod 18 is used both as a braking member and as a grounding sectionalizing member.
  • the two positions of rod 18 may be obtained by simply rotating this rod, possibly in synchronized relationship through mechanical coupling means provided between the different single-phase rods in case the station unit is of the multiphase type.
  • each rod 6 (or 7) comprises a radial stud such as 17 permitting of locking the bridge 8 by inserting this stud into a retaining member 13 somewhat as in a bayonet coupling.
  • This rod 18 like the rod 6 of the first form of embodiment, consists partly of conducting metal 18b and partly of insulating material 18a.
  • the conducting section 18b comprises at its junction with the insulating section a conducting projection 18c (enlarged portion, collar portion, etc.).
  • the rod 18 is mechanically and electrically connected or rigid with bridge 8 and moves bodily therewith during the upward and downward strokes.
  • the rod 18 is held against movement and its conducting projection 180 is, grounded in this case via contact 14, its conducting section 18b sliding through the contact 120 of bridge 8.
  • the rod 18 is held against movement by providing a second stud 19 carried by this rod 18 above the projection 18c (this stud 19 being located on one generatrix of rod 18 which is spaced 90 apart from that receiving the first stud 17), second stud 19 being adapted to engage a finger 20 rigid with the vessel 1 above the ground contact 14.
  • the device in its closing condition then acts as a sectionalizing device to provide a ground circuit between conductor and ground 14 via elements 10, 5b, 5a, 717, 1217, 8, 12a, 18b, 18c and 14.
  • the device is converted from a breaker device to a grounding sectionalizing device without requiring any manual intervention as far as contact rods are concerned; both functions are obtained through two separate control members 21 and 22.
  • the device according to this third modified form ofembodiment is shown in elevational view in FIG. 9 and comprises three chambers 1 (one per phase) and connections 9a, 9b and 90 (designated by the general reference numeral 9 in FIG. 10) connected to bars 23a, 23b and 230, respectively (general reference numeral 23 in FIG. 10).
  • the control mechanism is enclosed in a casing C from the opposite sides of which project the ends 24a and 24b of coaxial shafts which are provided with control levers 21, 22 ending with handles 21a and 22a, respectively, constituting the control members mentioned in the foregoing.
  • the breaker device properly so-called consisting essentially of a pair of parallel sliding rods 6 and 7 interconnected by a conducting bridge 8 is housed in the insulating chamber 1 of each phase, divided at its lower portion into two poles 1a and 1b containing the double contact members 4 and 5 respectively, as in the other forms of embodiment described hereinabove.
  • the conducting bridge 8 is rigid with rod 7 but comprises a through contact 12b engaged by the other rod 6; overlying this bridge 8 is a grounded sliding contact 14 adapted to coact with rod 6.
  • Each plug-in contact element 5b of member 5 is engaged by a rod 10 leading to a cable head 25.
  • a setting member 21 provided with a control handle 21a is adapted, when pivoted about the stationary axis of shafts 24a, 24b, to cause the angular movement of a lever 33 having one end rigid with said setting member 21 and its other end pivotally engaged in a push member 26 jointly engaging registering and coplanar ledges 27 and 28 rigidly connected to one end of compression springs 29 and 30, respectively.
  • lock or latch means of conventional and known type, for example as shown diagrammatically at 31 and 32, are adapted to release the ledges 27 and 28, respectively.
  • the device having previously been operated as a breaker has closed the circuit as explained hereinabove.
  • springs 29 and 30 are shown in their released condition in FIG. 11 and in their stressed condition in FIG. 12. When compressed or stressed these springs 29 and 30 can move the pair of rods 6 and 7 until their lower ends are clamped by the contact elements 4a and 5a respectively (FIG. 13).
  • control lever 22 provided with a handle 22a is fulcrumed about a fixed axis materialized by shaft 2412; it is angularly solid with an arm 34 having its outer end pivoted to a push member 35 holding a stud 36 rigid with the lower end of spring 29, a latch member 32 keeping the spring 29 in its compressed stressed condition.
  • the mechanism comprises a same and single spring for performing all the maneuvers contemplated.
  • control lever 21 provided with a handle 21a is fulcrumed about a fixed spindle or shaft 24 and comprises on the one hand a pivot pin to which is attached a link 100a rigid with a setting strap 101 and on the other hand a cam member 102 coacting with a coupling member 103 for engaging the two push movable members 104 and 105 to which the pair of contact rods 6 and 7 are attached.
  • the control lever 21 compresses through link 100a and setting strap 101 the spring 106 at causes jointly through its cam member 102 the movement of coupling member 103, thus providing a m'echanical 104 and 10S, and therefore the associated contact rods 6 and 7 connecting electrically the both conductors (for example the set of bars 23 and cable head 25, FIG. 18).
  • the coupling member 103 is provided with a positioning stud 110 which, during the movements of said push members, slides along a guide slot 111 formed in a fixed portion of the mechanism, thus ensuring an accurate positioning of said coupling member.
  • the latch 107 is double and has its two studs disposed on either side of the mechanism; the simultaneous movements of these studs are obtained by means of the transverse shaft 112, and the release takes place in the opposite direction with the assistance of latch member 113.
  • the lever 22 provided with a control handle 22a is fulcrumed about the fixed spindle 24a.
  • lt comprises a pivot pin 114 from which a link 115 solid with the setting strap 101 is suspended.
  • control lever 22 compresses the spring 106 through link 115 and setting strap 101, and at the end of this movement said strap releases the latch 109, thus permitting the expansion of spring 106 and therefore the movement of push member 104 to which contact 7 is attached (FIG. 20).
  • the second lever 22 has no cam portion and therefore does not actuate the coupling member; under these conditions, on the one hand the two push members are independent of each other and on the other hand the latch member 107 keeps holding in a fixed position the push member 105 and the rod 6 attached thereto and electrically connected via ground contact 14 to the metal cover of the breaker device.
  • the conducting bridge 8 rigid with rod 7 moves bodily with push member 105 by sliding along the fixed contact rod 6 to the'closed" position of the switch device when an electrical connection is established from the ground contact 14 through fixed rod 6, through contact 12b, conducting bridge 8, movable rod 7, and the breaking contact element a connected in turn to means (for example a cable head).
  • means for example a cable head.
  • these levers are adapted to be disconnected from each other as shown in diagrammatic form in FIG. 21. It is clear that in their inoperative positions these levers are urged by a spring 116 for engagement with the fixed portion 108 of the mechanism so as to be disconnected in relation to link 100a (position a").
  • Both levers are provided with this clutch device and a device of known type (not shown) is also provided for interlocking these levers and positively preventing the operation of one lever when the other lever has started its movement.
  • Electric breaker device for high-voltage wiring system which comprises a casing of electrically insulating material closed by a metal cover, a pair of movable contact rods per phase, adapted to be moved vertically by means of a mechanism, said rods having their upper portions made of electrically insulating material or of an externally insulated conducting material and conducting lower portions, said conducting portions of said rods being interconnected by a conducting bridge, a pair of contact members each connected to a conductor, such as a cable head or bar, and adapted to be each connected to the other rod in one of their positions, and a ground circuit, characterized in that a third contact member connected to said ground circuit is disposed in the vicinity of the upper portion of said casing, said third contact member being electrically connected to one of said conductors, such as a cable head, through said conducting bridge and at least one of said rods in the grounding condition of the device; a contact rod actuating mechanism for raising and lowering the contact rods; said actuating mechanism including two separate control members, actuating
  • said mechanism comprises two springs or groups of springs of which one actuates one rod while all of said springs actuate both rods simultaneously, the first spring or group of springs being stressed and released by the first control member and all of said springs being stressed and released by the second control member.
  • one of the control members consists of a lever provided with a handle disposed externally of the device and adapted to pivot about a fixed axis, an arm angularly rigid with said control lever and adapted to move a finger engaging studs rigid with one end of said springs whereby the springs associated with the two sections of the mechanism can be stressed jointly during the movement of said first control lever from one end to the other of its end positions while retaining the other end of said springs through latch means and allowing said springs to operate at the end of the setting movement by releasing said latch means through the inherent movement of the arm thus actuating simultaneously two rods.
  • the second control member consists of a lever provided with a handle disposed externally of the device and pivoted about a fixed axis which may be the same as that of the first control member, said second control lever being angularly solid with the end of a spring and permitting of stressing the setting spring of that section of the mechanism which is associated with only one of said contact rods when said second lever is moved from one to the other of its two end positions while holding the other spring end by means of a latch and allowing the spring to expand at the end of the setting movement by releasing the latch as a consequence of the inherent movement of said lever so as to actuate one of said contact rods.
  • Device characterized in that the two control members are pivotally mounted about a common axis, one of the control members being provided with a cam member engaging with its contour a coupling member adapted to operate jointly the push members of said contact rods and also to actuate the bolt of a latching device for releasing one of said push members, the one control member also acting upon a link attached to a spring stressing strap, a latch consisting of an arm fulcrumed to a fixed pivot pin being adapted to hold said second push member upon completion of the setting movement, said last-named latch being released during the setting movement of said strap so as to permit the downward movement of the second push member and the coupling members of which a positioning stud engages a fixed guide member and is adapted to carry along the first push member.
  • An electric circuit breaker for a high-voltage wiring system comprising:
  • each rod having a lower, electrically conductive portion and an upper, electrically insulating portion;
  • each contact member in said casing for each respective two movable contact rods, each contact member being constructed to connect with a respective conductor such as a cablehead or bar exteriorly of the casing and each contact member being positioned for electrical connection with the conductive portion of a respective one of said contact ro'ds upon movement of that contact rod to the lower position thereof;
  • a conducting bridge electrically connecting the conductive portions of the two contact rods via means including at least one annular contact on the bridge, said annular contact slidably receiving the respective contact rod conductive portion whereby said respective contact rod may be moved between the upper and lower positions thereof, moving relative to the conducting bridge, yet remaining in electrical contact therewith;
  • the third contact member being disposed so that it is electrically connected to said conductive portion of said respective contact rod only when said respective contact rod is in the upper position thereof;
  • the electric circuit breaker further comprising:
  • contact rod moving means selectively actuable to (a) raise and lower the two contact rods conjointly, and (b) raise and lower said respective contact rod independently of said other contact rod.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
US10794A 1969-12-09 1970-02-12 High-voltage circuit breaking devices, notably for a shielded-type prefabricated electric station Expired - Lifetime US3622728A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR6942447A FR2098470A5 (fr) 1969-12-09 1969-12-09

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US10794A Expired - Lifetime US3622728A (en) 1969-12-09 1970-02-12 High-voltage circuit breaking devices, notably for a shielded-type prefabricated electric station

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US (1) US3622728A (fr)
BE (1) BE745868A (fr)
CH (1) CH531804A (fr)
DE (1) DE2006394A1 (fr)
FR (1) FR2098470A5 (fr)
GB (1) GB1296131A (fr)
NL (1) NL7002022A (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090226256A1 (en) * 2008-02-20 2009-09-10 Roger Alain Asphalt melting device and system
CN111416284A (zh) * 2020-05-05 2020-07-14 赵芹 一种配电柜
CN112103119A (zh) * 2020-09-09 2020-12-18 贵州电网有限责任公司 一种多功能防滑落高压刀闸

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61141733U (fr) * 1985-02-22 1986-09-02

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2166590A (en) * 1936-11-17 1939-07-18 Nijland Hendrik A Hidde Electric circuit breaker
US2458792A (en) * 1946-01-16 1949-01-11 Hendrik A H Nijland Electric circuit breaker
US2700718A (en) * 1953-03-04 1955-01-25 Coq Nv Switching device for high tension
DE966204C (de) * 1939-01-17 1957-07-18 Siemens Ag Elektrische Unterbrechungseinrichtung, insbesondere fuer schlagwettergefaehrdete Betreibe
DE1203858B (de) * 1962-06-13 1965-10-28 Coq Nv Metallumschlossener Schalter fuer hohe Spannung
FR1438917A (fr) * 1964-07-06 1966-05-13 Nv Installation de distribution d'électricité sous enceinte métallique
US3317683A (en) * 1965-10-15 1967-05-02 Ark Les Switch Corp Electric switch with multiple contact actuator tie bar construction capable of multi- or single-switch selection

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2166590A (en) * 1936-11-17 1939-07-18 Nijland Hendrik A Hidde Electric circuit breaker
DE966204C (de) * 1939-01-17 1957-07-18 Siemens Ag Elektrische Unterbrechungseinrichtung, insbesondere fuer schlagwettergefaehrdete Betreibe
US2458792A (en) * 1946-01-16 1949-01-11 Hendrik A H Nijland Electric circuit breaker
US2700718A (en) * 1953-03-04 1955-01-25 Coq Nv Switching device for high tension
DE1203858B (de) * 1962-06-13 1965-10-28 Coq Nv Metallumschlossener Schalter fuer hohe Spannung
FR1438917A (fr) * 1964-07-06 1966-05-13 Nv Installation de distribution d'électricité sous enceinte métallique
US3317683A (en) * 1965-10-15 1967-05-02 Ark Les Switch Corp Electric switch with multiple contact actuator tie bar construction capable of multi- or single-switch selection

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090226256A1 (en) * 2008-02-20 2009-09-10 Roger Alain Asphalt melting device and system
CN111416284A (zh) * 2020-05-05 2020-07-14 赵芹 一种配电柜
CN112103119A (zh) * 2020-09-09 2020-12-18 贵州电网有限责任公司 一种多功能防滑落高压刀闸
CN112103119B (zh) * 2020-09-09 2022-12-09 贵州电网有限责任公司 一种多功能防滑落高压刀闸

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FR2098470A5 (fr) 1972-03-10
CH531804A (fr) 1972-12-15
GB1296131A (fr) 1972-11-15
DE2006394A1 (de) 1971-06-24
NL7002022A (fr) 1971-06-11
BE745868A (fr) 1970-07-16

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