US3815059A - Circuit interrupter comprising electromagnetic opening means - Google Patents

Circuit interrupter comprising electromagnetic opening means Download PDF

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Publication number
US3815059A
US3815059A US00331077A US31107772A US3815059A US 3815059 A US3815059 A US 3815059A US 00331077 A US00331077 A US 00331077A US 31107772 A US31107772 A US 31107772A US 3815059 A US3815059 A US 3815059A
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United States
Prior art keywords
circuit interrupter
contact arm
contact
slot
magnetic
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 - Lifetime
Application number
US00331077A
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English (en)
Inventor
L Spoelman
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CBS Corp
Original Assignee
Westinghouse Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Westinghouse Electric Corp filed Critical Westinghouse Electric Corp
Priority to US00331077A priority Critical patent/US3815059A/en
Priority to ZA738632A priority patent/ZA738632B/xx
Priority to AU62538/73A priority patent/AU486719B2/en
Priority to CA186,137A priority patent/CA985722A/en
Priority to BR9229/73A priority patent/BR7309229D0/pt
Priority to PH15266A priority patent/PH11797A/en
Priority to BE1005543A priority patent/BE808016A/xx
Priority to IT31841/73A priority patent/IT1002055B/it
Priority to JP1973136929U priority patent/JPS5345256Y2/ja
Priority to AR251316A priority patent/AR201297A1/es
Priority to DE2360439A priority patent/DE2360439B2/de
Priority to ES420998A priority patent/ES420998A1/es
Priority to CH1685373A priority patent/CH583968A5/xx
Priority to FR7342831A priority patent/FR2209203B1/fr
Priority to GB5590973A priority patent/GB1412705A/en
Application granted granted Critical
Publication of US3815059A publication Critical patent/US3815059A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • H01H77/10—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 electrodynamic opening
    • H01H77/107—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 electrodynamic opening characterised by the blow-off force generating means, e.g. current loops
    • H01H77/108—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 electrodynamic opening characterised by the blow-off force generating means, e.g. current loops comprising magnetisable elements, e.g. flux concentrator, linear slot motor
    • 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
    • H01H77/06—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 electromagnetic opening

Definitions

  • ABSTRACT A circuit interrupter is constructed to utilize the electromagnetic forces generated by an overload current condition in order to, drive a movable contact arm to open the contacts of the interrupter.
  • a circuit interrupter is constructed such that an overload current in an elongated current carrying contact arm generates electromagnetic forces that operate in a magnetic device to drive the contact arm to an open position at high speed to provide current limiting and to interrupt the overload current.
  • a magnetic-drive circuit interrupter comprising an insulating housing and acircuit interrupter structure supported in the housing.
  • the circuit interrupter structure comprises a stationary contact, a movable contact cooperable with the stationary contact, and an elongated generally flatcontact arm carrying the movable contact in proximity to one end thereof.
  • the contact arm is supported for pivotal movement in proximity to the other end thereof.
  • An arcextinguishing structure is supported in the housing in proximity to the cooperable contacts;
  • the elongated contact arm which carries the current through the breaker, is biased by spring biasing means, into the closed position.
  • a magnetic device comprising a plurality of plates of magnetic material, is provided with a slot open at one end thereof and closed at the other end thereof'The magnetic device is supported in the housing over the contact arm.
  • the contact arm in the closed position thereof, is disposed in the slot of the magnetic device in proximity to the open end of the slot.
  • the spring biasing means is strong enough to maintain the contact arm in the closed position under normal current conditions.
  • the magnetic flux that is generated by the overload current, operates in the magnetic device to drive the movable contact arm upward in the slot toward the closed end of the slot to thereby open the contacts at high speed.
  • the are formed between the contacts during opening operations is extinguished in the arc-extinguishing structure.
  • the contact arm is opened at such high speeds upon the occurrence of fault currents that the circuit interrupter serves as a current limiter as well as a circuit interrupter.
  • the current-limiting action protects the circuit, and the apparatus connected therein, from the destructive effects of the maximum available shortreturn the contact arm to the closed position.
  • the invention has particular utility in a combination where the magnetic-drive circuit interrupter is supported in an end-to-end series relationship with a standard stored-energy type circuit interrupter.
  • the magnetic-drive circuit interrupter takes the place of current-limiting fuse means utilized in prior art combinations of the type disclosed in the. patent to Dyer US. Pat. No. 3,077,525.
  • An advantage of a magnetic drive circuit interrupter over current limiting fuse means is that the magnetic-drive circuit interrupter can be reset and reused without requiring replacement of fuses.
  • two elongated contact arms are provided.
  • the contact arms are biased toward eachother into a closed position.
  • Two magnetic devices of the'type previously described are provided, and the contact arms are connected, by gear means, for simultaneous movement in opposite directions.
  • the contact arms are driven in opposite directions toward the open position upon the occurrence of overload current conditions above a predetermined value. Since the contact arms are both moving the contact arms are opened at'a higher speed.
  • the magnetic device is modified in that the slot therein is generally T-shaped, and a flexible current carrying conductor is wound about a part of the magnetic device through the upper arm of the T-shaped slot.
  • FIG. 1 is a top plan view, with parts broken away, of a circuit interrupting structure constructed in accordance with principles of this invention.
  • FIG. 2 is a sectional view taken generally along the line II--II of FIG.'1;
  • FIG. 3 is a sectional view of one pole unit of the magnetic-drive circuit interrupter seen in FIG. 2 and taken along the line III-III of FIG. 2;
  • FIG. 4 is a side sectional view, with parts broken away, illustrating another magnetic-drive circuit interrupter constructed in accordance with the principles of this invention
  • FIG. 5 is a sectional view, taken generally along the line VV of FIG. 4;
  • FIG. 6 is a partial side sectional view, with parts broken' away, illustrating another embodiment of the invention.
  • FIG. 7 is a sectional view taken generally along the line VII-VII of FIG. 6.
  • FIGS. 1 and 2 DESCRIPTION OF THE PREFERRED EMBODIMENTS
  • a three pole circuit interrupting device 5 comprising a stored-energy type circuit interrupter or circuit breaker 7,and a magnetic-drive circuit interrupter interrupter 7 is a three-pole circuit interrupter comprising an insulating housing 11 and a circuit-interrupter mechanism 13 supported in the housing 11.
  • the housing 11 comprises a back insulating housing base 15 and a front insulating housing cover '17 cooperating with the base 15 to enclose the circuit-interrupter mechanism
  • the circuit interrupter mechanism 13 comprises an operating mechanism 19, a latch mechanism 2 and a thermal and magnetic trip device 23.
  • a stationary contact 25, a movable contact 27 and an arc-extinguishing structure 29 are providedfor each pole unit of the stored-energy circuit interrupter 7.
  • the stationary contact 25 for each pole unit is fixedly mounted on the inner end of a conducting strip 31' that extends outward to an external cavity where a wellknown type of solderless terminal connector 33 is secured to the end of the conductor 31.
  • the movable contact 27, for each pole unit is mounted ona contact arm 35 that is mounted on a switch arm 37 that is fixedly secured to a common insulating tie bar 39.
  • the operating mechanism 19 comprises an inverted generally U-shaped operating lever 41, an overcenter spring means 43 and a toggle 45.
  • An insulating handle 47 is connected to the lever 41, with the handle 47 protruding through a suitable opening in the front of the housing 11.
  • the lever 41 is mounted for pivotal movement about the inner ends of the legs thereof.
  • the toggle 45 is pivotally connected at one end thereof to a trip member 49 and at the other end thereof to the switch arm 37 of the center pole unit.
  • the toggle 45 comprises two links pivotally connected together at a knee pivot 50.
  • the contacts are manually opened by movement of the handle 47 from the on or closed position to the off" or open position. This movement moves the lines of action of the overcenter springs 43 to cause collapse of the toggle 45 to thereby cause opening movement of the switch arm 37 in the center pole unit. Since all three switch arms are connected to the tie bar 39 for simultaneous movement. this movement simultaneously moves the three switch arms 37 to the open po-' sition.
  • the contacts are manually closed by reverse movement of the handle 47 from the off to the on" position, which movement moves the line of action of the overcenter springs 43 to erect the toggle 45 to thereby move the'center pole switch arm 37, and therefore all the switch arms 37, to the closed position seen in FIG. 2.
  • the operating mechanism 19 comprises the trip member 49 that is latched by means of a latch device 21.
  • the trip device 23 comprises a bimetal 51, a magnetic yoke 53 and a magnetic armature 55.
  • the bimetal 51 is heated and flexes to the right with a time delay whereupon an ad- 5 justing screw 57 engages a common trip bar 59 to move the trip bar 59 to a releasing position to release a latch 61 which thenreleases the trip member 49.
  • the springs 43 are in a stored energy charged condition.
  • the circuit breaker is reset and relatched by movement of the handle 47 to the full of? position whereupon a part 62 of the lever 41 engages a shoulder 63 of the trip member 49 to move the trip member 49 back to the latched position.
  • the armature 55 When the stored energy circuitinterrupter 7 is subjected to an overload above a second predetermined value higher than the first predetermined value, the armature 55 is instantaneously attractedto the yoke 53 pivoting about a pivot 64 in a clockwisedirection whereupon an upper portion of the armature 55 engages the trip bar 59 to move the trip bar 59 to the tripped position to effect a tripping operation in the same manner as was hereinbefore described with regard to the thermal tripping operation.
  • the circuit through each pole unit of the stored energycircuit interrupter 7 extends from a generally L -shaped conductor 65 through a flexible conductor 67, the bimetal 51, a flexible conductor 71, the contact arm 35, the movable contact 27, the stationary contact 25, the conductor 31, to the solderless terminal connector 33.
  • each pole unit there is in each pole unit a pair of cavities at the opposite ends of the housing.
  • the conductor 33 is supported in the cavity on the right and the conductor 65 extends into the cavity on the left.
  • the conductor 65 is positioned to be connected to one of the terminals of the magneticdrive circuit interrupter 9 in a manner to be hereinafter more specifically described.
  • the magnetic-drive circuit interrupter 9 comprises three pole units 77 supported in a side-by-side relationship to. each other and in an end-to-end relationship with the three pole units of the stored energy type circuit interrupter 7. Since the three pole units are of identical construction, only one of the pole units will be specifically described herein.
  • the pole unit comprises an insulating housing 78 comprising an insulating base 79 and an insulating cover 81 secured to the base'79.
  • a stationary contact 83 is supported on a terminal 85 that extends out through an opening in the housing 78 and that is providedwith' an opening therein for receiving a screw 87 that secures the terminal conductor 85 to the associated conductor 65 of the stored energy circuit interrupter 7.
  • a movable contact 91 is supported on one end of an elongated flat current carrying contact arm 93 that is supported for movement between open and closed positions about a pivot pin 95.
  • the contact arm 93 is provided with a latch extension 97 that cooperates with a latch 99 in a manner to be hereinafter described.
  • a compression coil spring 101 is supported between tension 97 to bias the contact arm 93 in a clockwise direction to the closed position seen in FIG. 2.
  • the latch 99 is supported for movement on a pivot pin 105 and biased toward the latching position seen in FIG. 2 by means of a coil spring 107.
  • An insulating plunger 111 which extends out through a suitable opening in the housing 78, is biased to the inoperative position seen in FIG. 2 by means of a spring 113.
  • a solderless terminal connector 115 is supported on a conductor 117 that is secured to the insulating base 78 by means of a screw 119.
  • a flexible conductor 121 is connected at one end thereof to the conductor 117 and at the other end thereof to the contact arm 93. As can be seen in FIG.
  • a magnetic device 133 is supported on the housing 78 by means of the molded insulating housing and also by means of an elongated pin 134 that extends through the magnetic device 133 and is secured in suitable slots in the housing 78.
  • the magnetic device 133 comprises a plurality of lamina tions of relatively thin generally U-shaped plates 135 of soft magnetic material, such as iron, that are secured together in a face-toface relationship.
  • a thin insulation coating is provided over the surface area of the magnetic device 133.
  • each of the plates 135 is formed as an inverted generally U-shaped plate to provide a slot 137 in the magnetic device 133 for receiving the contact arm 93.
  • the slot 137 starts at the leftwith a small height dimension, which height dimension increases going to the right so that the slot 137 can receive the pivoted contact arm 93 in. the fully open position.
  • the slot 137 is a relatively narrow slot that is open at the bottom and closedat the top of the magnetic device 133.
  • the magnetic-drive circuit interrupter 9 is shown in the closed position in FIG. 2. in this position, a circuit extends from the solderless terminal connector 115 through the conductor 117, flexible conductor 121, elongated current carrying contact arm 93, movable contact 91, stationary contact 83, conductor 85, to the associated conductor 65 of the associated pole unit of the stored energy circuit interrupter 7.
  • the contacts 91, 93 are disposed in an arc-extinguishing structure 141.
  • the arc-extinguishing structure 141 comprises an insulating wrapper or support 143 and a plurality of flat, generally U-shaped plates 145 of magnetic material.
  • the magnetic plates 145 are supported in a stacked spaced face-to-face remined value higher than the second predetermined value, the spring 101 (FIG. 2) has a force that overcomes the electromagnetic forces so that the contact arm 93 remains in the closed position.
  • the electromagnetic forces are sufficient to overcome the bias of the spring 101 and rapidly drive the contact arm 93 in a counterclockwise F IG. 2) direction about the pivot to an open position determined by the engagement of the contact arm 93 with a stop surface 146.
  • the high current conditions under the severe overload or short circuit generate large magnetic forces on the contact arm 93 so that the contact 93 is moved to the open position at a very high speed, limiting the severe overload or fault current to a more tolerable value to provide a current limiting action.
  • an arc is drawn between the contacts 91, 83, and the arc is magnetically drawn into the bight portions of the spaced magnetic plates where it is broken up into a plurality of serially related arcs to be extinguished in a well-known manner.
  • the let-through current is sufficient to start the magnetic armature 55 of the circuit interrupter 7 in a tripping direction and the inertia of this moving part causes the armature to continue in motion after the current is interrupted with the result that the trip member 59 is unlatched and the contacts of all three pole units are opened by the tripping of the'circuit interrupter 7.
  • the magnetic force which drives the contact arm at high speed under fault conditions is powered by the fault current itself.
  • B is the flux density in the gap where the conductor is located, in gauss.
  • the latch 97 which cams past the latch 99, is engaged and latched in the open position by the latch 99.
  • Suitable stop means such as the surface 146 stops movement of the contact arm 93 in the open position.
  • the plunger 111 is depressed, moving the latch 99 in a clockwise releasing direction to release the latch 97 whreupon the spring 101 returns the contact arm 93 to the closed position seen in FIG. 2.
  • the circuit interrupter 7 is relatched following a tripping operation in the same manner as was hereinbefore described.
  • the flat contact arm 93 moves in the relatively narrow slot 137 in an endwise direction which is alongthe planes of the generally flat sides thereof.
  • FIGS. 4 and 5 Another embodiment of the invention is illustrated in FIGS. 4 and 5 wherein parts similar to the parts of the first embodiment are identified with reference characters that are primed.
  • the circuit interrupter 9 of FIGS. 4 and 5 would be mounted in a series relationship with a stored energy type circuit breaker of the type disclosed in FIG. 2 in a manner similar to that disclosed in FIG. 2 and the flexible conductor 155 would be extended to be connected to a terminal similar to the terminal 85 of FIG. 2 that would in turn be connected to the terminal 65 of FIG. 2.
  • An additional flexible conductor 157 (FIG. 4) would be connected to a solderless terminal connector similar to the solderless terminal connector 115 of FIG. 2.
  • FIGS. 4 Another embodiment of the invention is illustrated in FIGS. 4 and 5 wherein parts similar to the parts of the first embodiment are identified with reference characters that are primed.
  • the circuit interrupter 9 of FIGS. 4 and 5 would be mounted in a series relationship with a stored energy type circuit breaker of the type disclosed in FIG. 2 in
  • two elongated current carrying generally flat contact arms 93 are supported on pivots 95 within the insulating housing 78.
  • Each ofthe contact arms 93' carries a movable contact 91' at the free end thereof, and springs 101 bias the contact arms 93 in opposite directions to the closed position seen in FIG. 4 wherein the contacts 91 are engaged.
  • An arcextinguishing structure 141. comprising aplurality of spaced generally U-shaped magnetic plates 145, I is supported in proximity to the free ends of the contact arms 93 and the contact arms move to an open position in the aligned slots of the magnetic plates 145.
  • a pair of magnetic devices 133 are supported in the housing by means of the pins 135', and the contact arms 93' move within the slots 137' of the respective magnetic devices 133.
  • Each of the contact arms 93' is provided with a gear part 161 at the pivoted end thereof, and the gear parts 161 mesh to provide for simultaneous movement of the contact arm 93' in opposite directions.
  • the circuit through the circuit interrupter 9 extends from a solderless terminal connector similar to the terminal connector 115 of FIG. 2, through the flexible conductor 157, the upper contact arm 93. the movable contacts 91. the lower contact arm 93, the flexible conductor 155 to a terminal similar to the terminal 85 of FIG. 2.
  • the biasing force of the springs 101' is sufficient to maintain the contact arms 93' in the closed position seen in FIGS. 4 and 5.
  • the current through the contact arms 93' generates magnetic flux which operates in the associated magnetic devices 133 along the flux paths indicated by the arrows in FIG. 5.
  • the electromagnetic forces generated by the current in the contact arms 93' overcome the bias of the springs 101 and move the contact arms 93 in opposite directions (the upper contact arm 93 moving counterclockwise and the lower contact arm 93' moving clockwise in FIG. 4) to the open position at high speed under the large electromagnetic forces.
  • the gear 161 serves to provide for simultaneous opening movement of the contact arms 93.
  • the latch part 97 of the upper contact arm 93' cooperates with a de featable latch structure similar to the latch structure in FIG. 2 so that the contacts will remain in the open position until defeat of the latch structure by depression of a plunger similar to the plunger 111 in FIG. 2 whereupon the springs 101 will return the contact arms 93 to the closed position.
  • the contact arms 93 move at high speed to provide current limiting action during the interruption of the circuit.
  • FIGS. A third embodiment of the invention is disclosed in FIGS. (Sand 7.
  • a circuit interrupter 165 comprises a housing 167 that comprises an insulating base 169 and an insulating cover 171 secured to the base 169.
  • a stationary Contact 173 issupported on a conducting terminal 175, and a movable contact 177 is supported at the free end of an elongated flat current carrying contact arm 179 that is supported for pivotal movement about the pivot 181.
  • An arcextinguishing structure 183 similar to that disclosed at 141 in FIG. 2, is supported in the housing to interrupt arcs drawn between the separating contacts 177, 173.
  • a magnetic device 187 comprising a plurality of plates 189 of magnetic material, is supported in the housing by means of the molded insulating housing and a supporting pin 191 that is secured to the housing.
  • the plates 189 are slotted so that the magnetic device 187 is formed with a generally T-shaped slot 193 therein.
  • a flexible conductor 195 extends from the left (FIG. 6) and is formed to provide a plurality of turns about the upper part of the magnetic device 187 with the conductor extending through the upper portion of the T-shaped slot I93v in the manner disclosed in FIGS. 6 and 7.
  • the one end of the conductor 195 is secured to the contact arm 179.
  • the circuit through the circuit interrupter 165 extends through the conductor 195 from the left (FIG. 6) through the coil portion of the conductor 195, the contact arm 179, the contacts 177, 173 to the conductor I75. Terminals (not shown) are provided at opposite ends of the circuit interrupter 165 to enable connection of the circuit interrupter in an electric circuit.
  • the magnetic-flux generated by the current in the conductor 195 and the elongated contact arm 179 operates in the magnetic device 187 in a path indicated by the arrows in FIG. 7.
  • Biasing means biases the contact arm 179 to the closed position seen in FIG. 6.
  • the contact arm 179 is driven to the open position at high speed to limit the current during circuit interrup tion.
  • the are drawn between the contacts 173, 177 is drawn into the magnetic plates 184 of the arcextinguishing structure 183 to be broken up into a plurality of serially related arcs and extinguished in a well known manner.
  • a circuit interrupter comprising a housing, a circuit interrupter structure supported in said housing, said circuit interrupterstructure comprising a stationary contact, a movable contact cooperable with said stationary contact, a contact arm carrying said movable contact, means supporting said contact arm for movement between closed and open positions, means biasing said contact arm into the closed position, a magnetic drive structure comprising a magnetic device of magnetic material having an open slot therein open at one end thereof and closed at the other end thereof, said contact arm being positioned in said slot in proximity to the open end of said slot, the circuit through said circuit interrupter passing-through said contact arm and said contacts in the closed position of said contact arm, upon the occurrence of an overload current above a predetermined value through said contact arm the magnetic flux generated by said current in said contact arm operating in said magnetic device to drive said contact arm into said slot toward'the closed end of said slot to thereby open said contacts.
  • a circuit interrupter according to claim 1 and an arc-extinguishing structure supported in said housing in proximity to said contacts to effect extinction of arcs drawn between said contacts during opening operations of said circuit interrupten 3.
  • said circuit interrupter according to claim 2 said circuit interrupter comprising a first terminal means at one end thereof and a second terminal means at the other end thereof to enable connection of said circuit interrupter in an electric circuit.
  • said contact arm being an elongated contact arm
  • said magnetic device comprising a plurality of laminations of plates of magnetic material with said slot being an elongated slot elongated in the direction of elongation of said contact arm, and said elongated contact arm in the closed position thereof extending lengthwise through said elongated slot in proximity to the open end of said elongated slot.
  • a circuit interrupter according to claim 4, said contact arm being a generally flat contact arm positioned to move in said slot along planes coexistent with the planes of the flat sides of said contact arm.
  • a circuit interrupter according to claim 4, latch means automatically latching said contact arm in the open position. and latch release means releasable to unlatch said contact arm whereupon said biasing means automatically moves said contact arm to the closed position.
  • pivot support means supporting said elongated contact arm in proximity to one end of said elongated contact arm for pivotal movement about a fixed pivot, said pivot support means being disposed at one end of said magnetic device, said contact arm carrying said movable contact thereon at the opposite end of said contact arm and at the opposite end of said magnetic device. and said slot means in said magnetic device having a reduced height dimension in proximity to said pivot support means and an increased height dimension in proximity to said movable contact.
  • A' circuit interrupter said magnetic device being formed with said slot therein such that in the cross section of said magnetic device said slot is a generally T-shaped slot, a main conductor for carrying current in said circuit'interrupter, said main conductor forming a plurality of turns around a portion of said magnetic device with said turns going over the top of said magnetic device and through the upper arm of said T-shaped slot and with said main conductor being connected to one end of said contact arm such that the current through said circuit interrupter extends in series relation through said turns of said main conductor and said elongatedcontact arm whereby the current through said turns of said main conductor-and said elongated contact arm generates magnetic flux in said magnetic device to force said contact arm rapidly to the open position upon the occurrence of said overload current above said predetermined value.
  • a circuit interrupter according to claim 8, and an arc-extinguishing structure supported in said housing in proximity to'said contacts to .effect extinction of arcs drawn between said contacts during opening operations of said circuit interrupter.
  • said contact arm being a generally flat contact arm positioned to move in said slot along planes coexistent with the planes of the flat sides of said contact arm.
  • a circuit interrupter according to claim 10 said circuit interrupter comprising a first terminal means at one end thereof and a second terminal means at the other end thereof to enable connection of said circuit interrupter in an electric circuit.
  • a circuit interrupter comprising a housing, a circuit interrupter structure supported in said housing, said circuit interrupter structure comprising a pair of elongated contact arms, a separate movable contact supported on each of said elongated contact arms, means supporting said contact arms for movement toward each other to a closed position wherein said movable contacts are engaged and for movement away from each other toward an open position wherein said movable contacts are disengaged, means biasing said contact arms into the closed position, a separate magnetic drive structure for each of said movable contact arms, each of said magnetic drive structures comprising a magiiiiwvre dfiiiagnetic material having an open slot therein open at one end thereof and closed at the other end thereof, each of said contact arms being positioned in the slot of the associated magnetic device in proximity to the open end of the slot of the associated magnetic device in the closed position of said contacts, the circuit through said circuit interrupter passing first through one of said contact arms then through the engaged movable contacts and then through the other of said contact arms, upon the occurrence of an
  • each of said contact arms being an elongated contact arm
  • each of said magnetic devices comprising a plurality of laminations of generally flat magnetic plates of magnetic material supported in a face-to-face relationship with the associated slot extending from one end thereof to the other end and with the associated elongated contact arm extending lengthwise in the associated slot.
  • each of said contact arms being a generally flat contact arm positioned to move in the associated slot along planes coexistent with the planes of the flat sides thereof.
  • a circuit interrupter according to claim 15, and a separate pivot support means for each of said contact arms pivotally supporting the associated contact arm for a pivotal movement about a fixed pivot.
  • a circuit interrupter according to claim 16, and a gear means in proximity to the pivoted ends of said contact arms connecting said contact arms for simultaneous movement between open and closed positions.
  • a circuit interrupter according to claim 17 releasable latch means automatically operable to latch said contact arms in the open position, and manually,
  • latch release means operable to release said latch means whereupon said biasing means automatically biases said contact arms back to the closed position following opening operations of said circuit interrupter.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Breakers (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Emergency Protection Circuit Devices (AREA)
US00331077A 1972-12-01 1972-12-01 Circuit interrupter comprising electromagnetic opening means Expired - Lifetime US3815059A (en)

Priority Applications (15)

Application Number Priority Date Filing Date Title
US00331077A US3815059A (en) 1972-12-01 1972-12-01 Circuit interrupter comprising electromagnetic opening means
ZA738632A ZA738632B (en) 1972-12-01 1973-11-09 An improvement in or relating to circuit interrupter comprising electromagnetic opening means
AU62538/73A AU486719B2 (en) 1972-12-01 1973-11-15 Improvements in or relating to circuit interrupter comprising electromagnetic opening means
CA186,137A CA985722A (en) 1972-12-01 1973-11-19 Circuit interrupter comprising electromagnetic opening means
BR9229/73A BR7309229D0 (pt) 1972-12-01 1973-11-26 Interruptor de circuito
PH15266A PH11797A (en) 1972-12-01 1973-11-28 Circuit interrupter comprising electromagnetic opening means
IT31841/73A IT1002055B (it) 1972-12-01 1973-11-29 Interruttore di circuito compren dente mezzi elettromagnetici di apertuta
BE1005543A BE808016A (fr) 1972-12-01 1973-11-29 Interrupteur de circuit muni d'un moyen d'ouverture electromagnetique
JP1973136929U JPS5345256Y2 (ja) 1972-12-01 1973-11-30
AR251316A AR201297A1 (es) 1972-12-01 1973-11-30 Interruptor de circuito, que comprende medios electromagneticos de apertura
DE2360439A DE2360439B2 (de) 1972-12-01 1973-11-30 Selbsttätiges Schaltgerät mit durch Stromkräfte bewegbarem Schaltstück
ES420998A ES420998A1 (es) 1972-12-01 1973-11-30 Un dispositivo interruptor de circuito.
CH1685373A CH583968A5 (ja) 1972-12-01 1973-11-30
FR7342831A FR2209203B1 (ja) 1972-12-01 1973-11-30
GB5590973A GB1412705A (en) 1972-12-01 1973-12-03 Circuit interrupter comprising electromagnetic opening means

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Application Number Priority Date Filing Date Title
US00331077A US3815059A (en) 1972-12-01 1972-12-01 Circuit interrupter comprising electromagnetic opening means

Publications (1)

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US3815059A true US3815059A (en) 1974-06-04

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US00331077A Expired - Lifetime US3815059A (en) 1972-12-01 1972-12-01 Circuit interrupter comprising electromagnetic opening means

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US3943473A (en) * 1974-04-29 1976-03-09 Square D Company Current limiting circuit breaker
US3943472A (en) * 1974-04-29 1976-03-09 Square D Company Current limiting circuit breaker
US3959753A (en) * 1974-01-25 1976-05-25 Westinghouse Electric Corporation Circuit interrupter with load side short circuit
US3991391A (en) * 1974-01-29 1976-11-09 Westinghouse Electric Corporation Circuit interrupter with electromagnetic opening means
US3999155A (en) * 1974-09-25 1976-12-21 Westinghouse Electric Corporation Circuit interrupter including a current-limiting reactor
FR2326027A1 (fr) * 1975-09-23 1977-04-22 Westinghouse Electric Corp Disjoncteur a limitation de courant
US4025883A (en) * 1975-11-11 1977-05-24 Westinghouse Electric Corporation Modular integral motor controller
US4144513A (en) * 1977-08-18 1979-03-13 Gould Inc. Anti-rebound latch for current limiting switches
EP0004801A2 (fr) * 1978-03-31 1979-10-17 Merlin Gerin Disjoncteur à dispositif électromagnétique d'ouverture rapide du contact mobile
US4220934A (en) * 1978-10-16 1980-09-02 Westinghouse Electric Corp. Current limiting circuit breaker with integral magnetic drive device housing and contact arm stop
US4227161A (en) * 1978-10-16 1980-10-07 Westinghouse Electric Corp. Current limiting circuit breaker with pivoting contact arm
EP0018454A1 (en) * 1977-10-04 1980-11-12 Dorman Smith Switchgear Limited Electric circuit breaker
US4255732A (en) * 1978-10-16 1981-03-10 Westinghouse Electric Corp. Current limiting circuit breaker
EP0030872A2 (en) * 1979-12-17 1981-06-24 Gould Inc. Current-limiting circuit breaker adapter
US4325041A (en) * 1979-11-10 1982-04-13 Terasaki Denki Sangyo Kabushiki Kaisha Circuit interrupter
US4409573A (en) * 1981-04-23 1983-10-11 Siemens-Allis, Inc. Electromagnetically actuated anti-rebound latch
FR2531565A1 (fr) * 1982-08-06 1984-02-10 Telemecanique Electrique Dispositifs modulaires de limitation de courant
US4458224A (en) * 1982-04-20 1984-07-03 Siemens-Allis, Inc. Current-limiting circuit breaker adapter
US4467298A (en) * 1981-08-07 1984-08-21 La Telemecanique Electrique Automatic short-circuit current limiting device
US4470027A (en) * 1982-07-16 1984-09-04 Eaton Corporation Molded case circuit breaker with improved high fault current interruption capability
US4516182A (en) * 1981-01-16 1985-05-07 Ga Technologies Inc. Current limiting apparatus
US4527027A (en) * 1982-07-16 1985-07-02 Eaton Corporation Molded case circuit breaker with improved high fault current interruption capability
US4612430A (en) * 1984-12-21 1986-09-16 Square D Company Anti-rebound latch
US4620171A (en) * 1984-01-09 1986-10-28 Westinghouse Electric Corp. Molded case circuit breaker with resettable combined undervoltage and manual trip mechanism
US4630017A (en) * 1984-10-01 1986-12-16 Siemens Energy & Automation, Inc. Magnetic structure for calibrating a circuit breaker
US4630019A (en) * 1984-09-28 1986-12-16 Westinghouse Electric Corp. Molded case circuit breaker with calibration adjusting means for a bimetal
US4644307A (en) * 1985-06-12 1987-02-17 Kabushiki Kaisha Toshiba Current limiting type circuit breaker
US4680564A (en) * 1984-10-01 1987-07-14 Siemens-Allis, Inc. Multi-pole molded case circuit breaker with a common contact operating crossbar member
US4827231A (en) * 1988-01-28 1989-05-02 Westinghouse Electric Corp. Molded case circuit breaker with viewing window and sliding barrier
US4945326A (en) * 1988-04-18 1990-07-31 Fuji Electric Co., Ltd. Circuit breaker
US4951015A (en) * 1989-10-05 1990-08-21 Westinghouse Electric Corp. Circuit breaker with moving magnetic core for low current magnetic trip
EP0410257A1 (de) * 1989-07-26 1991-01-30 Siemens Aktiengesellschaft Elektromechanischer Schnellschalter
EP0418755A2 (en) * 1989-09-18 1991-03-27 Mitsubishi Denki Kabushiki Kaisha Current limiting circuit breaker
US5231365A (en) * 1990-12-11 1993-07-27 Hitachi, Ltd. Circuit breaker
US5394126A (en) * 1994-04-18 1995-02-28 Eaton Corporatiion Circuit breaker with improved magnetic trip assembly
US5428329A (en) * 1994-05-24 1995-06-27 Eaton Corporation Springclip means for a latchable operating mechanism on a circuit breaker
US5471184A (en) * 1994-07-13 1995-11-28 Eaton Corporation Circuit breaker
US5861596A (en) * 1997-04-01 1999-01-19 Eaton Corporation Dual baffle apparatus for electrical switching device
US5874873A (en) * 1997-08-22 1999-02-23 Eaton Corporation Electric control apparatus
US5973280A (en) * 1998-03-23 1999-10-26 Eaton Corporation Circuit breaker with an anti-lift pivot handle
US6034586A (en) * 1998-10-21 2000-03-07 Airpax Corporation, Llc Parallel contact circuit breaker
WO2002035571A1 (en) * 2000-10-24 2002-05-02 Siemens Energy & Automation, Inc. Auxiliary contact molded case circuit breaker
US20030016105A1 (en) * 2000-03-17 2003-01-23 Johann Bauer Electromagnetic switching device, in particular a contactor
US6831536B1 (en) 2003-08-29 2004-12-14 Eaton Corporation Circuit breaker slot motor having a stepped out portion
US20050128033A1 (en) * 2003-12-11 2005-06-16 Mueller Robert W. Slot motor including legs engaging openings of circuit breaker housing and electrical switching apparatus employing the same
US20070241081A1 (en) * 2006-04-12 2007-10-18 Eaton Corporation Slot motor and circuit breaker including the same
EP2251887A1 (en) 2009-05-15 2010-11-17 Abb Ag Electromagnetic trip device
US20120182096A1 (en) * 2011-01-19 2012-07-19 Abb Ag Installation switching device
US20130206729A1 (en) * 2010-06-07 2013-08-15 Eaton Electrical Ip Gmbh & Co. Kg Switch unit with arc-extinguishing units
US20150048911A1 (en) * 2011-11-29 2015-02-19 Eaton Electrical Ip Gmbh & Co. Kg Permanent magnet assembly for an arc driver assembly and switching device
CN113284773A (zh) * 2021-05-26 2021-08-20 上海电器科学研究所（集团）有限公司 一种内置限流熔断器的开关

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FR2351483A1 (fr) * 1976-05-12 1977-12-09 Merlin Gerin Disjoncteur rapide limitateur
US4245203A (en) * 1978-10-16 1981-01-13 Westinghouse Electric Corp. Circuit interrupter with pivoting contact arm having a clinch-type contact
DE59008339D1 (de) * 1989-07-26 1995-03-09 Siemens Ag Elektromechanischer Schnellschalter.
DE19952179A1 (de) * 1999-10-29 2001-05-03 Moeller Gmbh Elektrisches Schutzschaltgerät
CN114878953B (zh) * 2022-07-07 2022-09-23 国网辽宁省电力有限公司 继电保护出口矩阵测试仪

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Cited By (74)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3959753A (en) * 1974-01-25 1976-05-25 Westinghouse Electric Corporation Circuit interrupter with load side short circuit
US3991391A (en) * 1974-01-29 1976-11-09 Westinghouse Electric Corporation Circuit interrupter with electromagnetic opening means
US3943473A (en) * 1974-04-29 1976-03-09 Square D Company Current limiting circuit breaker
US3943472A (en) * 1974-04-29 1976-03-09 Square D Company Current limiting circuit breaker
US3999155A (en) * 1974-09-25 1976-12-21 Westinghouse Electric Corporation Circuit interrupter including a current-limiting reactor
FR2326027A1 (fr) * 1975-09-23 1977-04-22 Westinghouse Electric Corp Disjoncteur a limitation de courant
US4056798A (en) * 1975-09-23 1977-11-01 Westinghouse Electric Corporation Current limiting circuit breaker
US4025883A (en) * 1975-11-11 1977-05-24 Westinghouse Electric Corporation Modular integral motor controller
US4144513A (en) * 1977-08-18 1979-03-13 Gould Inc. Anti-rebound latch for current limiting switches
FR2400761A1 (fr) * 1977-08-18 1979-03-16 Gould Inc Systeme de verrouillage anti-rebond pour des interrupteurs de limitation de courant
EP0018454A1 (en) * 1977-10-04 1980-11-12 Dorman Smith Switchgear Limited Electric circuit breaker
EP0004801A2 (fr) * 1978-03-31 1979-10-17 Merlin Gerin Disjoncteur à dispositif électromagnétique d'ouverture rapide du contact mobile
FR2421458A1 (fr) * 1978-03-31 1979-10-26 Merlin Gerin Disjoncteur multipolaire a dispositif electromagnetique d'ouverture rapide du contact mobile
EP0004801A3 (en) * 1978-03-31 1979-10-31 Merlin Gerin Circuit breaker with an electromagnetic device for a fast opening operation of the movable contact
US4219790A (en) * 1978-03-31 1980-08-26 Merlin Gerin Current limiting circuit breaker
US4220934A (en) * 1978-10-16 1980-09-02 Westinghouse Electric Corp. Current limiting circuit breaker with integral magnetic drive device housing and contact arm stop
US4227161A (en) * 1978-10-16 1980-10-07 Westinghouse Electric Corp. Current limiting circuit breaker with pivoting contact arm
US4255732A (en) * 1978-10-16 1981-03-10 Westinghouse Electric Corp. Current limiting circuit breaker
US4325041A (en) * 1979-11-10 1982-04-13 Terasaki Denki Sangyo Kabushiki Kaisha Circuit interrupter
EP0030872A2 (en) * 1979-12-17 1981-06-24 Gould Inc. Current-limiting circuit breaker adapter
US4346357A (en) * 1979-12-17 1982-08-24 Gould Inc. Current-limiting circuit breaker adapter
EP0030872A3 (en) * 1979-12-17 1982-03-17 Gould Inc. Current-limiting circuit breaker adapter
US4516182A (en) * 1981-01-16 1985-05-07 Ga Technologies Inc. Current limiting apparatus
US4409573A (en) * 1981-04-23 1983-10-11 Siemens-Allis, Inc. Electromagnetically actuated anti-rebound latch
US4467298A (en) * 1981-08-07 1984-08-21 La Telemecanique Electrique Automatic short-circuit current limiting device
US4458224A (en) * 1982-04-20 1984-07-03 Siemens-Allis, Inc. Current-limiting circuit breaker adapter
US4527027A (en) * 1982-07-16 1985-07-02 Eaton Corporation Molded case circuit breaker with improved high fault current interruption capability
US4470027A (en) * 1982-07-16 1984-09-04 Eaton Corporation Molded case circuit breaker with improved high fault current interruption capability
EP0102867A1 (fr) * 1982-08-06 1984-03-14 Telemecanique Dispositifs modulaires de limitation de courant
FR2531565A1 (fr) * 1982-08-06 1984-02-10 Telemecanique Electrique Dispositifs modulaires de limitation de courant
US4620171A (en) * 1984-01-09 1986-10-28 Westinghouse Electric Corp. Molded case circuit breaker with resettable combined undervoltage and manual trip mechanism
US4630019A (en) * 1984-09-28 1986-12-16 Westinghouse Electric Corp. Molded case circuit breaker with calibration adjusting means for a bimetal
US4630017A (en) * 1984-10-01 1986-12-16 Siemens Energy & Automation, Inc. Magnetic structure for calibrating a circuit breaker
US4680564A (en) * 1984-10-01 1987-07-14 Siemens-Allis, Inc. Multi-pole molded case circuit breaker with a common contact operating crossbar member
US4612430A (en) * 1984-12-21 1986-09-16 Square D Company Anti-rebound latch
US4644307A (en) * 1985-06-12 1987-02-17 Kabushiki Kaisha Toshiba Current limiting type circuit breaker
US4827231A (en) * 1988-01-28 1989-05-02 Westinghouse Electric Corp. Molded case circuit breaker with viewing window and sliding barrier
US4945326A (en) * 1988-04-18 1990-07-31 Fuji Electric Co., Ltd. Circuit breaker
EP0410257A1 (de) * 1989-07-26 1991-01-30 Siemens Aktiengesellschaft Elektromechanischer Schnellschalter
EP0418755A2 (en) * 1989-09-18 1991-03-27 Mitsubishi Denki Kabushiki Kaisha Current limiting circuit breaker
EP0418755A3 (en) * 1989-09-18 1992-03-25 Mitsubishi Denki Kabushiki Kaisha Current limiting circuit breaker
US5159304A (en) * 1989-09-18 1992-10-27 Mitsubishi Denki Kabushiki Kaisha Current limiting circuit breaker
US4951015A (en) * 1989-10-05 1990-08-21 Westinghouse Electric Corp. Circuit breaker with moving magnetic core for low current magnetic trip
AU628648B2 (en) * 1989-10-05 1992-09-17 Westinghouse Electric Corporation Circuit breaker with moving magnetic core for low current magnetic trip
US5231365A (en) * 1990-12-11 1993-07-27 Hitachi, Ltd. Circuit breaker
US5394126A (en) * 1994-04-18 1995-02-28 Eaton Corporatiion Circuit breaker with improved magnetic trip assembly
US5428329A (en) * 1994-05-24 1995-06-27 Eaton Corporation Springclip means for a latchable operating mechanism on a circuit breaker
US5471184A (en) * 1994-07-13 1995-11-28 Eaton Corporation Circuit breaker
EP0692806A1 (en) 1994-07-13 1996-01-17 Eaton Corporation Improved circuit breaker
US5861596A (en) * 1997-04-01 1999-01-19 Eaton Corporation Dual baffle apparatus for electrical switching device
US5874873A (en) * 1997-08-22 1999-02-23 Eaton Corporation Electric control apparatus
US5973280A (en) * 1998-03-23 1999-10-26 Eaton Corporation Circuit breaker with an anti-lift pivot handle
US6034586A (en) * 1998-10-21 2000-03-07 Airpax Corporation, Llc Parallel contact circuit breaker
US6420948B1 (en) * 1998-10-21 2002-07-16 Airpax Corporation, Inc. Parallel contact circuit breaker
US20030016105A1 (en) * 2000-03-17 2003-01-23 Johann Bauer Electromagnetic switching device, in particular a contactor
US6870450B2 (en) * 2000-03-17 2005-03-22 Siemens Aktiengesellschaft Electromagnetic switching device, in particular a contactor
WO2002035571A1 (en) * 2000-10-24 2002-05-02 Siemens Energy & Automation, Inc. Auxiliary contact molded case circuit breaker
US6831536B1 (en) 2003-08-29 2004-12-14 Eaton Corporation Circuit breaker slot motor having a stepped out portion
US20050128033A1 (en) * 2003-12-11 2005-06-16 Mueller Robert W. Slot motor including legs engaging openings of circuit breaker housing and electrical switching apparatus employing the same
US6970059B2 (en) 2003-12-11 2005-11-29 Eaton Corporation Slot motor including legs engaging openings of circuit breaker housing and electrical switching apparatus employing the same
US20070241081A1 (en) * 2006-04-12 2007-10-18 Eaton Corporation Slot motor and circuit breaker including the same
US7348514B2 (en) 2006-04-12 2008-03-25 Eaton Corporation Slot motor and circuit breaker including the same
WO2010130414A1 (en) * 2009-05-15 2010-11-18 Abb Ag Electromagnetic trip device
EP2251887A1 (en) 2009-05-15 2010-11-17 Abb Ag Electromagnetic trip device
CN102449720A (zh) * 2009-05-15 2012-05-09 Abb股份公司 电磁脱扣装置
US8373523B2 (en) 2009-05-15 2013-02-12 Abb Ag Electromagnetic trip device
US20130206729A1 (en) * 2010-06-07 2013-08-15 Eaton Electrical Ip Gmbh & Co. Kg Switch unit with arc-extinguishing units
US8921728B2 (en) * 2010-06-07 2014-12-30 Eaton Electrical Ip Gmbh & Co. Kg Switch unit with arc-extinguishing units
US20120182096A1 (en) * 2011-01-19 2012-07-19 Abb Ag Installation switching device
US8451076B2 (en) * 2011-01-19 2013-05-28 Abb Ag Installation switching device
US20150048911A1 (en) * 2011-11-29 2015-02-19 Eaton Electrical Ip Gmbh & Co. Kg Permanent magnet assembly for an arc driver assembly and switching device
US10290439B2 (en) * 2011-11-29 2019-05-14 Eaton Intelligent Power Limited Permanent magnet assembly for an arc driver assembly and switching device
CN113284773A (zh) * 2021-05-26 2021-08-20 上海电器科学研究所（集团）有限公司 一种内置限流熔断器的开关
CN113284773B (zh) * 2021-05-26 2022-12-20 上海电器科学研究所（集团）有限公司 一种内置限流熔断器的开关

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Publication number Publication date
CA985722A (en) 1976-03-16
JPS49119762U (ja) 1974-10-14
ES420998A1 (es) 1976-04-01
IT1002055B (it) 1976-05-20
JPS5345256Y2 (ja) 1978-10-30
AU6253873A (en) 1975-05-15
CH583968A5 (ja) 1977-01-14
ZA738632B (en) 1974-09-25
DE2360439B2 (de) 1978-07-06
AR201297A1 (es) 1975-02-28
DE2360439A1 (de) 1974-06-06
GB1412705A (en) 1975-11-05
PH11797A (en) 1978-07-05
BE808016A (fr) 1974-05-29
FR2209203A1 (ja) 1974-06-28
BR7309229D0 (pt) 1974-08-29
FR2209203B1 (ja) 1980-05-23

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