US2515994A - Operating mechanism for circuit breakers - Google Patents

Operating mechanism for circuit breakers Download PDF

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Publication number
US2515994A
US2515994A US716104A US71610446A US2515994A US 2515994 A US2515994 A US 2515994A US 716104 A US716104 A US 716104A US 71610446 A US71610446 A US 71610446A US 2515994 A US2515994 A US 2515994A
Authority
US
United States
Prior art keywords
operating
toggle
lever
latch
closing
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
US716104A
Other languages
English (en)
Inventor
Jr Joseph D Findley
Alvin W Ogg
Fritz E Florschutz
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
Priority to BE483223D priority Critical patent/BE483223A/xx
Priority to FR957213D priority patent/FR957213A/fr
Application filed by Westinghouse Electric Corp filed Critical Westinghouse Electric Corp
Priority to US716104A priority patent/US2515994A/en
Application granted granted Critical
Publication of US2515994A publication Critical patent/US2515994A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/50—Manual reset mechanisms which may be also used for manual release
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
    • H01H3/30—Power arrangements internal to the switch for operating the driving mechanism using spring motor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/11—Tripping mechanism

Definitions

  • This invention relates to circuit breakers and more particularly to operating mechanisms for circuit breakers
  • An object of the invention is to provide a circuit breaker with an improved high-speed operating mechanism wherein the breaker contact means are trip-free of the closing means.
  • Another object of the invention is to provide a circuit breaker with an improved operating mechanism having a few parts, the elements of which are arranged in compact form to improve the eiiiciency of operation.
  • Another object of the invention is to provide a circuit breaker with an improved operating mechanism which is simple in construction, reliable and efficient in operation and inexpensive to manufacture.
  • Fig. 1 is a side elevational view, partly in section, of a circuit breaker embodying the principles of the invention
  • Fig. 2 is a detailed sectional view taken through the operating mechanism showing the mechanism in the closed circuit position.
  • Fig. 3 is a sectional view similar to Fig, 2 but showing the operating mechanism in the tripped position just before the mechanism is reset;
  • Fig. 4 is a sectional view taken through the operating mechanism showing the mechanism in the automatically reset position
  • Fig. 5 is an enlarged detail view of the latching mechanism.
  • the circuit breaker is of the roll-out type and is mounted on a truck comprising a pair of side plates (only one being shown) which are rigidly joined by cross members I3,
  • the truck is mounted on wheels 28 to facilitate rolling the circuit breaker into and out of a cubicle in order to connect and disconnect the breaker in an electrical circuit.
  • the circuit breaker is of the multi-pole type (only one pole being shown) and comprises a plurality of pairs of separable contact means (only one pair being shown) indicated senerally at 2
  • the contact means comprises stationary contacts 23 and 3
  • the back plate 31 is rigidly supported by angular brackets 33 (only one being shown) rigidly secured to the side plates of the truck.
  • pivotally mounted at 43 on the terminal member 35 carries a bridging contact member 45 for cooperating with the stationary contacts 29 and 3
  • the switch arm also carries a movable arcing contact 41 which cooperates with a stationary arcing contact 49 mounted on the terminal 33 for drawing an arc upon opening movement of the switch arm 4
  • for each pole of the breaker is operatively connected by means of an insulating operating rod 5
  • is pivotally connected by means of a pivot pin 53 to the switch arm 4
  • the cross bar 59 is pivotally connected by means of pivot pins 52 at its ends to ar: operating levercomprising a pair of spaced levers 5
  • and 63 are rigidly connected by an integral U-shaped cross member and are pivotally supported on a shaft 61.
  • the shaft E1 is mounted in the side members of a generally U-shaped frame 69 (Fig. 1) supported on the cross members
  • the operating mechanism comprises a closing lever 15 (Figs. 2, 3 and 4) also pivotally mounted on the shaft 61.
  • the closing lever 15 comprises a pair of spaced levers (only one being shown) rigidly connected by an integral cross bar 11.
  • the closing lever 15 is connected by means of a pivot pin 18 to one end of a link 8
  • the operating lever 63 and the closing lever 15 are operatively connected by means of a thrust transmitting toggle comprising toggle links 81 and 88 pivotally connected together by means of a knee pivot pin 3
  • the toggle link l1 is pivotally connected to the operating lever by means of a pivot pin 93 and the toggle link 83 which comprises a pair of spaced parallel links is pivotally connected by means of the pivot pin 19 to the closing lever 15.
  • 'Ihe closinglever15 is held in closed position (Fig. 2) by means of a latch 95 pivotally mounted on a rod 91 supported in the side members of the frame 69 (Fig. 1).
  • the latch 95 is biased by means of a spring 99 to latching position wherein a shoulder formed by a recess therein engages a roller mounted on the pin 19.
  • the toggle 81-89 is normally held in a slightly underset position by means of a. latch member
  • 03, have one end pivotally connected by means of a pivot pin
  • 03 is normally releasably restrained in latching position by means of the latching and tripping mechanism 25 which is more clearly shown in Fig. 5.
  • the latching and tripping mechanism comprises a U-shaped trip member
  • the bracket 3 is rigidly secured to a bracket
  • 5 is also secured to the cross members I3 (Fig. 1) by means of ⁇ spacers 1.
  • 09 carries a latch roller
  • 09 is so constructed that it will not, of itself, restrain the latch member
  • a trigger latch comprising a channel-shaped latch member
  • 21 is pivotally supported on a pin
  • the latch member 21 is biased by means of a spring
  • the tripping electromagnet comprises a yoke member
  • -63 (Figs. 1 and 2) is biased in a clockwise or opening direction by means of a coil spring
  • 63 disposed forl reciprocal movement in the cylinder is connected by means of a link
  • 63 also serve as a dash pot to absorb the shock of the final opening movement of the operating mechanism.
  • 59 is transmitted by means of the underset toggle 91-69 to the closing lever 15 which is normally restrained in the position shown in Fig. 2 by the latch 95.
  • 59,therefore, tends to cause the toggle 81-89 to collapse toward the right (Fig. 2) which is prevented by the link
  • the tripping electromagnet includes an energizing coil
  • the closing solenoid 21 (Fig. l), in addition to the movable armature 65, also comprises a fixed core member
  • the closing; solenoid 21 is supported between the frame 69 (Fig. 1) and an end plate
  • an abnormal condition such for instance as an overload current in ping electromagnet
  • an abnormal condition such for instance as an overload current in ping electromagnet
  • the movable armature (not shown) thrusts the trip rod
  • the toggle 81-89 is reset to its underset posi tion and the latch member
  • 03 is eiected by means of a pair of springs
  • the contacts are closed by energization of the closing solenoid 21.
  • the solenoid 21 may be energized from any suitable source either automatically or by means of a manually operated switch means. When energized, the solenoid 21 attracts its armature 85 and through the link 8
  • a circuit breaker comprising relatively movable contact means, operating means for said contact means comprising an operating lever operable to effect opening of said contact means, a closing lever for operating said operating lever to close said contact means, thrust transmitting means connecting said levers, releasable means normally restraining said thrust transmitting means in thrust transmitting position, a single l pivot upon which said operating lever, said closclosed position by the movable armature 85 of the closing solenoid striking the stationary core
  • is prevented from going over center to the left of a line drawn through the pivots 53-61 by means of a projection
  • the contact means of thebreaker are tripfree of the closing means. That is, if, when the circuit breaker is operated to the closed position, the overload current condition has been cleared the breaker will remain in the closed contact position. However, should the overload current still persist the tripping electromagnet
  • operating means for said contact means comprising an operating lever operable to eiect opening of said Contact means, a closing lever operable to close said contact means, a single shaft pivotally supporting both of said levers, a thrust transmitting toggle operatively relating said levers, a releasable member also pivotally mounted on said shaft but independently of said levers, means operatively relating said toggle and said releasable member to normally maintain said toggle in thrust transmitting position, and trip means operable to release said releasable means to thereby permit collapse of said toggle and opening of said contact means.
  • operating means for said contact means comprising an operating lever operatively related to said contact means and operable to eiect opening of said contact means, a closing lever for actuating said operating lever to close said contact means, a shaft pivotally supporting said levers, latch means releasably restraining said closing lever in closed position, a thrust transmitting toggle operatively relating said levers, a releasable member pivoted on said shaft for restraining said toggle in thrust transmitting position, trip means operable to release said releasable member to permit collapse of said toggle and -opening of said contact means, and means operable upon collapse of said toggle to cause said latch means to release said closing lever to thereby reset said toggle to thrust transmitting position.
  • a circuit breaker comprising relatively movable contact means, operating mechanism for said contact means comprising an operating lever operable to effect opening of said contact means, a closing lever for operating said operating lever to close said contact means, thrust transmitting s 7 means operatively relating said levers, a releasable member normally restraining said thrust transmitting means in thrust transmitting position, a single shaft upon which both of said levers and said releasable member are ⁇ concentrically pivoted, trip means operable to release of said releasable means to thereby effect collapse of said thrust transmitting means and opening oi' said contact means, means operable by said thrust transmitting means upon collapse thereof for effecting resetting of said thrust transmitting means to thrust transmitting position, and power means for operating said levers to close said conber, releasable means pivoted on said common pivot means for normally restraining said thrust transmitting means in thrust transmitting position, and trip means operable to release said releasable means to-cause said thrust y
  • a circuit breaker comprising relatively movable contact means, power operating means for actuating saidcontactmeans to closed position comprising a closing lever, power means for actuating said closing lever, anv operating lever operatively related to said contact means, a pivot common to both of said levers for pivotally supporting said lever for independent movement, a thrust transmitting toggle operatively relating said closing lever and said operating lever for transmitting the movement of said closing lever to said operating lever to close said contact means,-
  • latch means pivoted on said common pivot re- .leasably restraining said toggle in thrust transmitting position, and trip means operable to eifect release of said toggle and opening of said contacts irrespective of the position of said closing lever.
  • a pivoted closing member a pivot common to both oi' said members for pivotally supporting 'said'- members, power means for actuating said closing member, a lthrust transmitting toggle operatively relating said operating member and said closing member for normally restraining said operating member in closed position, and means pivoted on said common pivot independently of said members for causing said toggle to permit opening movement of 'said operating member irrespective of the position of said closing member.
  • a circuit breaker comprising a movable switch member biased to open circuit position, operating mechanism therefor comprising an operating lever movable about a, fixed pivot and operatively related to said movable switch member, a closing lever movable about said flxed pivot, an operating toggle operatively relating said levers, a first holding means also movable about said xed pivot for releasably holdingsaid operating toggle in an underset position to hold said movable switch member in closed position, a second holding means for holding said closing lever in closed positions, trip means operable in response to overload currents for causing said nrs-t holding means to release said operating toggle to REFERENCES CITED
  • the following references are of record in le of this patent: l

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US716104A 1946-12-13 1946-12-13 Operating mechanism for circuit breakers Expired - Lifetime US2515994A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
BE483223D BE483223A (sr) 1946-12-13
FR957213D FR957213A (sr) 1946-12-13
US716104A US2515994A (en) 1946-12-13 1946-12-13 Operating mechanism for circuit breakers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US716104A US2515994A (en) 1946-12-13 1946-12-13 Operating mechanism for circuit breakers

Publications (1)

Publication Number Publication Date
US2515994A true US2515994A (en) 1950-07-18

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Family Applications (1)

Application Number Title Priority Date Filing Date
US716104A Expired - Lifetime US2515994A (en) 1946-12-13 1946-12-13 Operating mechanism for circuit breakers

Country Status (3)

Country Link
US (1) US2515994A (sr)
BE (1) BE483223A (sr)
FR (1) FR957213A (sr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2725442A (en) * 1950-02-11 1955-11-29 Westinghouse Electric Corp Circuit breakers
US2754389A (en) * 1951-10-29 1956-07-10 Ite Circuit Breaker Ltd Operating mechanism for circuit breakers
US2813950A (en) * 1953-08-18 1957-11-19 Ite Circuit Breaker Ltd Circuit breaker operating mechanism

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE302042C (sr) *
US1190060A (en) * 1913-06-04 1916-07-04 Gen Electric Electric switch.
US1950162A (en) * 1932-02-25 1934-03-06 Gen Electric Electric switch
US1957273A (en) * 1930-03-18 1934-05-01 Westinghouse Electric & Mfg Co Circuit breaker

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE302042C (sr) *
US1190060A (en) * 1913-06-04 1916-07-04 Gen Electric Electric switch.
US1957273A (en) * 1930-03-18 1934-05-01 Westinghouse Electric & Mfg Co Circuit breaker
US1950162A (en) * 1932-02-25 1934-03-06 Gen Electric Electric switch

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2725442A (en) * 1950-02-11 1955-11-29 Westinghouse Electric Corp Circuit breakers
US2754389A (en) * 1951-10-29 1956-07-10 Ite Circuit Breaker Ltd Operating mechanism for circuit breakers
US2813950A (en) * 1953-08-18 1957-11-19 Ite Circuit Breaker Ltd Circuit breaker operating mechanism

Also Published As

Publication number Publication date
FR957213A (sr) 1950-02-17
BE483223A (sr)

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