US2739205A - Circuit breaker with contact inspection device - Google Patents

Circuit breaker with contact inspection device Download PDF

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Publication number
US2739205A
US2739205A US323221A US32322152A US2739205A US 2739205 A US2739205 A US 2739205A US 323221 A US323221 A US 323221A US 32322152 A US32322152 A US 32322152A US 2739205 A US2739205 A US 2739205A
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US
United States
Prior art keywords
drive
arc
chute
arc chute
interrupter
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
US323221A
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English (en)
Inventor
Fritz E Florschutz
William H Stuellein
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.)
Westinghouse Electric 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 BE524651D priority Critical patent/BE524651A/xx
Application filed by Westinghouse Electric Corp filed Critical Westinghouse Electric Corp
Priority to US323221A priority patent/US2739205A/en
Priority to FR1091106D priority patent/FR1091106A/fr
Priority to JP2184953A priority patent/JPS303722B1/ja
Application granted granted Critical
Publication of US2739205A publication Critical patent/US2739205A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • H02B11/12—Switchgear having carriage withdrawable for isolation with isolation by horizontal withdrawal
    • H02B11/127—Withdrawal mechanism
    • H02B11/133—Withdrawal mechanism with interlock
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • H01H9/345—Mounting of arc chutes

Definitions

  • WITNESSES INVENTORS Z FritzE.Florschu1z and 477/ Wi
  • This invention relates to circuit interrupters in general, and, more particularly, to a contact inspection device more particularly adapted for use with a circuit interrupter of the type having a levering-in or drive-in device for moving the same into an operative position within a cubicle or other enclosed housing.
  • a general object of our invention is to provide an improved contact inspection device which may be utilized with the already existing levering-in or drive-in device.
  • Such drive-in device when manually operated, causes the interrupter to move into final position Within the cubicle.
  • Still further object is to provide an improved contact inspection device which may be readily attached to, and detached from, the interrupter, and which may utilize the motive power already existing in the form of a manuallyoperated leveriug-in or drive-in device.
  • the arc-chute structure is generally necessarily heavy and cumbersome, and when inspection of the contacts is desired, or inspection of internal parts of the arc chute is desired, it is generally necessary to utilize some sort of lifting crane to raise the arc chute away from the contact structure so that the latter may be visually inspected.
  • Gne object of our invention is toeliminate any such crane device, and to eliminate the necessity for a chain-pulley system for attachment to the arc chute to raise the same and thereby permit accessibility to the contact structure for maintenance or replacement.
  • Figure 1 is a side elevational view of a multipole circuit interrupter, somewhat diagrammatic, and partially broken away and showing the interrupter out of its cell and in the position in which the linkage has been attached to the interrupter for the purpose of raising the arc chute;
  • Fig. 2 is a fragmentary front elevational view of the multipole circuit interrupter shown in Fig. 1;
  • Fig. 3 is an elevational view of one of the side framework members illustrating the stop and raceway bracket for the circuit interrupter, a portion of the circuit breaker being fragmentary and diagrammatically illustrated in the position in which it is initially stopped by the stop bracket;
  • Fig. 4 is a fragmentary view similar to that shown in Fig. 3, but indicating the position in which the interrupter has been forced by partial actuation of the leveling-in or drive-in device;
  • Fig. 5 is a view similar to that shown in Fig. 4 but indicating the final operative position of the circuit interrupter with respect to the cubicle;
  • Fig. 6 diagrammatically illustrates a station attendant effecting manual operation of the levering-in device just after the point at which the interrupter has been halted by the stop bracket;
  • Fig. 7 is an enlarged elevational view of the leveling-in device plate and stop bracket
  • Fig. 8 is an end elevational view device plate of Fig. 7;
  • Fig. 9 is a diagrammatic representation of an alternative form of our invention.
  • the reference numeral 1 generally designates a circuit interrupter out of its cubicle or cell, and including contact structure 2, terminal studs 3, 4, an arc chute 5, in which the arc is extinguished, and a levering-in or drive-in device 6.
  • the circuit interrupter 1 as well known by those skilled in the art, is assembled in framework manner, and is mounted for movement on a plurality of wheels 7.
  • the wheels 7 may have two rims, an outer rim 7a for moving on the floor and an inner rim 7b, of smaller diameter, for engaging with a track, not shown, associated with the cell or cubicle 8, more clearly shown in Fig. 6 of the drawings.
  • the cubicle or cell 8 not only provides greater safety for a station attendant 9 (Fig. 6), but also such a cell construction improves the appearance and permits substitution of the interrupter 1, whereby a spare may be utilized at a time when maintenance work is being done on the original interrupter.
  • the stop bracket 11 is of angular structure, as indicated in Figs. 7 and 8, and is welded to a drive-in channel plate 12, the latter being secured to angle members 13 associated with the side framework 8:! or" the cubicle 8, as more clearly shown in Pig. 3 of the drawings.
  • the foregoing arrangement provides a great mechanical advantage for forcing the interrupter 1 finally into its operative position by actuation of the gear mechanism 17, 18, and moreover provides a means for associating interlocking mechanism, not shown, with the drive-in rod 16 to perform various functions, .not pertinent to our present invention.
  • the drive-in mechanism 6 is not being used. It is a purpose of our invention to provide a movable arc chute 5 and a detachable mechanism such as a linkage, which will interconnect the drive-in device 6 with the arc chute 5 to cause the raising thereof to enable visual inspection of the contact structure 2. As more clearly shown in Fig. l, the arc chute 5 may be rotated about a pivot 25. It may be of the type set out and claimed in United States patent application Serial No. 720,165, filed January 4, 1947, now U. S. Patent 2,616,007, issued October 28, 1952, to Russell E. Frink and Robert C. Dickinson, and assigned to the assignee of the instant application.
  • Such an arc chute if constructed according to the aforesaid patent, involves a relatively heavy H-type magnet 26 having depending pole pieces 27 associated therewith, together with a pair of arc-chute stack structures 28, 29, which effect subdivision of the established are drawn between the stationary contact 36 and the movable contact 31.
  • Arc horns 48 and 49 are provided.
  • Arc horn 48 has a detachable bolted connection 48a with a conductor 50, the'latter being fixedly secured to the lower terminal stud 4.
  • the arc horn '49 has a separable blade and jaw connection 49a with the stationary contact 30.
  • the initially established arc is divided into two portions, each of which is moved by the magnetic structures 26, 27 upwardly on are horns 48, 49 into the arc-chute stack structures 28, 29 in which extinction is assured.
  • Each stack 28, 29 may comprise a plurality of spaced rectangularly-shaped ceramic slotted plates, not shown, which eifect restricting and cooling of the arc portions.
  • a pair of compression links 33 at the two opposite sides of the breaker and having slots 34 at their lower ends, are engaged with the rollers 10.
  • At the upper ends of the compression links 33 are pivotally connected the ends of a pair of tension links 35, the latter having their other ends pivotally mounted on fixed pins 36 by a detachable connection.
  • a rod 37 extends across the circuit breaker beneath the arc chutes and interconnects the two pairs of compression links and tension links 33, '35, as more clearly shown in Fig. 2.
  • a pair of bevelled rollers 40 Surrounding the laterally extending rod 37 are spacing sleeves 38, 39 and a pair of bevelled rollers 40, spaced laterally apart, and arranged to engage the lower sides 41, 42 of the arc chutes 5. As shown in Fig. 2, there are a pair of bevelled rollers 40 for each of the several arc chutes 5 of the interrupter 1.
  • our invention utilizes an existing mechanism which provides all the mechanical advantage needed to rotate the heavy arc chute 5. All that is required are a few interconnecting links 33, 35 and a rod 37, which may be attached to the rollers 10 and to the pivots 36 when the breaker 1 is out of its cell 8, and at a time when the levering-in device 6 is not being used. The result is elimination of any crane or chain pulley arrangement, which might otherwise be required to raise the arc chute 5 for contact inspection.
  • Fig. 9 shows an alternative form of our invention using the same principles :as set out heretofore, but eliminating the tension links 35. This is done by providing the outer free end 45 of each arc chute 5 with a slot 46 which is engaged by the rod 37 during its upward movement.
  • the compression links 33 and their attachment to the rollers 10 may be the same as that provided heretofore.
  • This modified form merely eliminates the tension links 35, andin effect forces the arc chute 5 itself to become a tension member during its upward rotative travel about the pivot 25.
  • An arc-chute mover for use with a circuit interrupter having a drive-in device to facilitate inspection of the arc chute and associated contact structure, including linkage means interconnecting the drive-in device with the arc chute, the drive-in device being normally actuable to force the circuit interrupter into 'an operative position, and the actuation of the drive-in device with the linkage means moving the arc chute for inspection purposes while the remainder of the circuit interrupter is relatively stationary.
  • An arc-chute mover for use with a circuit interrupter having a rotatable drive-in device to facilitate maintenance and inspection, including detachable linkage means interconnecting the rotatable drive-in device with the "arc chute, the drive-in device being normally actuable to force the circuit interrupter into an operative position, and the actuation of the drive-in device moving the arc chute and the linkage means for inspection purposes while the remainder of the circuit interrupter is relatively stationary.
  • An arc-chute lifter for use with a circuit interrupter having a manually-operated rotatable drive-in device aud a rotatable arc chute, including detachable linkage means interconnecting the rotatable drive-in device with the rotatable arc chute, the actuation of the drive-in device causing rotation of the are chute, and the drivein device being normally actuable to force the circuit interrupter into an operative position.
  • An arc-chute lifter for use with a circuit interrupter having a rotatable drive-in device and a rotatable arc chute, including detachable linkage means interconnecting the rotatable drive-in device with the rotatable arc chute, the actuation of the drive-in device causing rotation of the are chute, said linkage means including a compression link and a tension link, and the tension link having one end thereof pivoted adjacent the axis of rotation of the arc chute.
  • An arc-chute lifter for use with a circuit interrupter having a manuaily-operated rotatable drive-in device and a rotatable arc chute, including detachable linkage means interconnecting the rotatable drive-in device with the rotatable arc chute, the actuation of the drive-in device causing rotation of the arc chute, said linkage means including a compression link abutting the free end of the arc chute and the drive-in device being normally actuable to force the circuit interrupter into an operative position.
  • An arc-chute rotator for use with a circuit interrupter having a drive-in device, including one or more detachable compression links interconnecting the drivein device with the free end of the arc chute, whereby the arc chute may be rotated for inspection purposes and the drive-in device being normally actuable to force the cir- I interrupter into an operative position.
  • Au arc chute rotator for use with a circuit interrupter having a rotatable drive-in device, inciuding a pair of detachable compression links, the drive-device being norzuaily actuabie to force the circuit interrupter into an or ative position, the free end of the arc chute havtag a slot provided therein, a rod connecting the ends of the links, the other ends of the links being connected with the drive-in device, and rotation of the drive-in device effecting engagement of the rod with the slot to effect thereby rotation of the arc chute.
  • a circuit interrupter including a movable frame, a pair of bushings having terminal studs therethrough, a pair of disconnect contacts at the outer ends of the terminal studs, stationary and movable contacts for completing a circuit between the inner ends of the terminal studs, a movable arc chute structure having an H-type blowout magnet at a floating potential, a drive-in device for moving the frame into and out of operative position, and a mechanism interconnecting the drive-in device and the arc chute structure for moving the arc chute structure away from the contacts by actuation of the drive-in device.
  • a circuit interrupter including a movable frame, said frame having a pair of bushings having terminal studs theretl'rrough, a pair of disconnect contacts at the outer ends of the terminal studs, stationary and movable contacts for completing a circuit between the inner ends of the terminal studs, an arc extinguishing structure movably mounted relative to the frame, a drive-in device for moving the frame into and out of operative position, and mechanism interconnecting the drive-in device and the arc extinguishing structure for moving the arc extinguishing structure away from the contacts by actuation of the drive-in device.
  • a circuit interrupter including a movable frame, a pair of bushings having terminal studs therethrough, a pair of disconnect contacts at the outer ends of the terminal studs, stationary and movable contacts for completing a circuit between the inner ends of the terminal studs, an arc-extinguishing structure movably mounted relative to the frame, a rotatable drive-in device for moving the frame into and out of operative postion, and detachable mechanism interconnecting the rotatable drive-in device and the arc-extinguishing structure for moving the arc-extinguishing structure away from the contacts by actuation of the drive-in device.
  • a circuit interrupter including a movable frame, a pair of bushings having terminal studs therethrough, a pair of disconnect contacts at the outer ends of the terminal studs, stationary and movable contacts for completing a circuit between the inner ends of the terminal studs, an arc-extinguishing structure rotatably mounted relative to the frame, a rotatable drive-in device for moving the frame into and out of operative position, and detachable linkage means interconnecting the drive-in device and the arc-extinguishing structure for rotating the arc-extinguishing structure away from the contacts by actuation of the drive-in device.
  • a switchgear cell and a circuit interrupter including a movable frame movable thereinto and thercout of, said frame having a pair of bushings having terminal studs therethrough, a pair of disconnect contacts at the outer ends of me terminal studs, sta' tionary and movable contacts for completing a circuit between the inner ends of the terminal studs, an are extinguishing structure movably mounted relative to the frame, a drive-in device for moving the frame into and out of operative position within the switchgear cell, and mechanism interconnecting the drive-in device and the arc extiuguishng structure from moving the arc extinguishing structure away from the contacts by actuation of the drivein device.
  • a switchgear cell and a circuit interrupter including a movable frame movable thereinto and thereout of, said frame having a pair of bushings having terminal studs therethrough, a pair of discon- .ect contacts at the outer ends of the terminal studs, stationary and movable contacts for completing a circuit between the inner ends of the terminal studs, an arc extinguishing structure movably mounted relative to the frame, a drive-in device for moving the frame into and out of operative position within the switchgear cell, and detachable mechanism interconnecting the drive-in device and the arc extinguishing structure for moving the arc extinguishing structure away from the contacts by actuation of the drive-in device.
  • a circuit interrupter having a movable contact and a movable arc chute, said are chute including are extinguishing members, a complete magnetic circuit and a coil for energizing the magnetic circuit all mounted for movement as a unit, a manually operable device on the circuit interrupter, a mechanism giving a mechanical advantage mechanically interconnecting the manually operable device with the arc chute, said manually operable device and mechanism being independent of the movable contact whereby the are chute may be moved by operation of the manually operabie device without movement of the movable contact.
  • a circuit interrupter including a movable truck, an arc extinguishing device mounted upon the truck and having a movable contact associated therewith, said are extinguishing device including a movable are chute, a manually operable device mounted on the truck, a mechanism mounted upon the truck giving a mechanical advantage mechanically interconnecting the manually operable device with the movable arc chute, said manually operable device and mechanism being independent of the 7 movable contacnwherehy the arc chute may be moved by operation of the manually operable device Without movement of the movable contact.
  • a circuit interrupter including a movable truck, an arc extinguishing device mounted upon the truck and havinga movable contact asosciated therewith, said are extinguishing device including a movable arc chute, a manually operable drive-in device mounted upon the truck and actu'able to drive the truck into an operative position, the manually operable drive-in device being independent of the movable contact, and means interconnecting the manually '8 oia'erable diiven device with the movable arc chute to effect the movement of the arc chute.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Trip Switchboards (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Mechanisms For Operating Contacts (AREA)
US323221A 1952-11-29 1952-11-29 Circuit breaker with contact inspection device Expired - Lifetime US2739205A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
BE524651D BE524651A (en, 2012) 1952-11-29
US323221A US2739205A (en) 1952-11-29 1952-11-29 Circuit breaker with contact inspection device
FR1091106D FR1091106A (fr) 1952-11-29 1953-11-27 Disjoncteur avec dispositif de vérification des contacts
JP2184953A JPS303722B1 (en, 2012) 1952-11-29 1953-11-28

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US323221A US2739205A (en) 1952-11-29 1952-11-29 Circuit breaker with contact inspection device

Publications (1)

Publication Number Publication Date
US2739205A true US2739205A (en) 1956-03-20

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US323221A Expired - Lifetime US2739205A (en) 1952-11-29 1952-11-29 Circuit breaker with contact inspection device

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US (1) US2739205A (en, 2012)
JP (1) JPS303722B1 (en, 2012)
BE (1) BE524651A (en, 2012)
FR (1) FR1091106A (en, 2012)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3128359A (en) * 1960-01-06 1964-04-07 Westinghouse Electric Corp Circuit interrupters having arc extinguishing means
US3171008A (en) * 1961-11-22 1965-02-23 Mc Graw Edison Co Latchable raising and lowering means for disconnecting switch of metal enclosed switchgear
US4012609A (en) * 1972-11-21 1977-03-15 Westinghouse Electric Corporation Circuit-interrupters using spaced-apart bars for conductor-assemblies
WO2006048382A1 (de) * 2004-11-02 2006-05-11 Siemens Aktiengesellschaft Schaltanlage mit einer entriegelnden lichtbogenbegrenzung

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3545781A1 (de) * 1985-12-20 1987-06-25 Siemens Ag Elektrisches schaltgeraet mit zum verfahren innerhalb einer schaltzelle dienenden fuehrungsmitteln

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1993273A (en) * 1930-12-30 1935-03-05 Trumbull Electric Mfg Co Electric switch
US2259005A (en) * 1938-08-27 1941-10-14 Ite Circuit Breaker Ltd Circuit controlling device
US2405454A (en) * 1941-01-03 1946-08-06 Ite Circuit Breaker Ltd Circuit interrupter and control therefor
US2412931A (en) * 1943-12-15 1946-12-17 Westinghouse Electric Corp Switchgear apparatus
US2554510A (en) * 1946-09-12 1951-05-29 Ite Circuit Breaker Ltd Drawout mechanism for compartmented circuit breakers

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1993273A (en) * 1930-12-30 1935-03-05 Trumbull Electric Mfg Co Electric switch
US2259005A (en) * 1938-08-27 1941-10-14 Ite Circuit Breaker Ltd Circuit controlling device
US2405454A (en) * 1941-01-03 1946-08-06 Ite Circuit Breaker Ltd Circuit interrupter and control therefor
US2412931A (en) * 1943-12-15 1946-12-17 Westinghouse Electric Corp Switchgear apparatus
US2554510A (en) * 1946-09-12 1951-05-29 Ite Circuit Breaker Ltd Drawout mechanism for compartmented circuit breakers

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3128359A (en) * 1960-01-06 1964-04-07 Westinghouse Electric Corp Circuit interrupters having arc extinguishing means
US3171008A (en) * 1961-11-22 1965-02-23 Mc Graw Edison Co Latchable raising and lowering means for disconnecting switch of metal enclosed switchgear
US4012609A (en) * 1972-11-21 1977-03-15 Westinghouse Electric Corporation Circuit-interrupters using spaced-apart bars for conductor-assemblies
WO2006048382A1 (de) * 2004-11-02 2006-05-11 Siemens Aktiengesellschaft Schaltanlage mit einer entriegelnden lichtbogenbegrenzung
CN101040411B (zh) * 2004-11-02 2010-12-22 西门子公司 具有去联锁的电弧限制器的开关设备

Also Published As

Publication number Publication date
JPS303722B1 (en, 2012) 1955-05-31
FR1091106A (fr) 1955-04-07
BE524651A (en, 2012)

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