US3774137A - Latch and guide assembly for a dropout electrical fuse - Google Patents

Latch and guide assembly for a dropout electrical fuse Download PDF

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Publication number
US3774137A
US3774137A US00291467A US3774137DA US3774137A US 3774137 A US3774137 A US 3774137A US 00291467 A US00291467 A US 00291467A US 3774137D A US3774137D A US 3774137DA US 3774137 A US3774137 A US 3774137A
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United States
Prior art keywords
fuse
ferrule
latch
assembly
disposed
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
US00291467A
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English (en)
Inventor
J Carothers
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
Application granted granted Critical
Publication of US3774137A publication Critical patent/US3774137A/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
    • H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
    • H01H31/02—Details
    • H01H31/12—Adaptation for built-in fuse
    • H01H31/122—Fuses mounted on, or constituting the movable contact parts of, the switch
    • H01H31/127—Drop-out fuses

Definitions

  • ABSTRACT A fuse assembly including a pivotally mounted fuse holder having a fusible element disposed therein.
  • the fuse assembly is of the dropout type and adapted for indoor or outdoor use in relatively high voltage circuit applications, such as 34.5 KV.
  • the fuse holder is disposed in the fuse assembly generally vertically with the lower end of the fuse holder being supported by a hinge assembly on which the fuse holder may pivot.
  • the upper end is latched in place by a simplified latch assembly which includes a cantilevered span and locking recess into which a complementary locking and retaining protrusion on the fuse holder may be captured upon the placing of the fuse holder in a normal electrically conductive position.
  • FIG. I is a side view in elevation of a fuse assembly inthe closed position and which shows the latch assembly of the present invention
  • FIG. 5 is a top cutaway view of the latch assembly shown in FIG. 4;
  • a fuse unit or fuse means 24 comprising a fuse holder 25 inside of which is disposed a fusible element 25F and adjacent the ends of which are disposed an upper end ferrule or terminal 26 and a lower end ferrule or terminal 28.
  • Lower end terminal 28 has as part thereof a support trunnion 38 which is pivotably disposed in a corresponding opening or groove in frame 22.
  • FIG. 2 a front elevation of the fuse structure shown in FIG. I is depicted.
  • Base 11 and upper and lower insulating support members 12 and 14 combine to form a combination support member for fuse unit 24. It can be seen from this view that housing or weather protecting cover 18 for kickout latch assembly 16 flares outwardly and upwardly from the region of base 11 to avoid contacting end ferrule 26 of fuse holder 25 while it moves into the latching and kickout mechanism 27.
  • the upper ferrule is adapted to be swung, pivoted or moved into electrical contact with the combination kickout and latch bracket assembly 16L.
  • Fuse assembly 24R on the right has a corresponding fuse holder 25R, the lower ferrule of which is pivotally disposed in lower hinge assembly 20R and the upper end ferrule of which is adapted to be pivotally swung into connection with upper hinge assembly 16R.
  • Fuse holder 24R also has a lower terminal 47R for connection with an external electrical circuit to be protected by fuse 24R.
  • fuse units 24L and 24R may be connected to the same electrical circuit to provide parallel fusing for that circuit.
  • FIG. 4 an upper kickout and latch assembly or bracket means 16 such as shown in FIGS. 1 and 2 and similar to the kickout latch assembly 16L and 16R shown in FIG. 3 is illustrated.
  • the combination kickout latch assembly 16 is disposed upon a vertically oriented base means 50 having holes 52 therein for specific mounting purposes.
  • a vertically oriented base means 50 having holes 52 therein for specific mounting purposes.
  • a vertically oriented base means 50 having holes 52 therein for specific mounting purposes.
  • a vertically oriented base means 50 having holes 52 therein for specific mounting purposes.
  • a vertically oriented base means 50 having holes 52 therein for specific mounting purposes.
  • a vertically oriented base means 50 having holes 52 therein for specific mounting purposes.
  • a vertically oriented base means 50 having holes 52 therein for specific mounting purposes.
  • a vertically oriented base means 50 having holes 52 therein for specific mounting purposes.
  • a vertically oriented base means 50 having holes 52 therein for specific mounting purposes.
  • the kickout latch assembly 16 shown in FIGS. 4 and 5 is especially adapted for an outdoor dropout type fuse assembly, that is, a fuse assembly meant to be applied outdoors in an electrical substation where weather, especially ice producing weather, may affect the operation of the fuse.
  • This fuse is also meant to dropout or kickout once a fuse element such as 25F shown in FIG. 1 has blown or fused.
  • the kickout member 70 is adapted to provide an outward counterclockwise force to dropout fuse when the fuse element has blown so that the fuse may pivot clockwise outwardly away from kickout and latch assembly 16.
  • FIG. 6 an indoor non-dropout type fuse employing similar component parts as the outdoor dropout type fuse shown in FIGS. 4 and 5, is shown;
  • Latch mechanism 27' has three identifiable portions, namely a top or upper portion 54, a lower portion 56' and an intermediate or joining portion 58, all of which may be integral and constructed from the same piece of electrically conductive material which may bebent into the various required shapes.
  • Lower portion 56 includes the previously described grasping members 68' which are similar to members 68 shown in FIGS. 4' and 5.
  • Upper member 54 includes a cantilevered portion 60', a rectangular hole 73', a top piece 62', a corresponding angularly oriented upper guide means 64' and left and right guide means 61 shown as part of the top piece 62, the hole or recess 73' being intermediate to the upper top piece 62 and the cantilevered section 60'.
  • the axially projecting portion 94 makes contact with the lower part of top piece 62 whereupon the upper part of the virtually axially projecting portion 94 tracks virtually horizontally along the lower portion of top piece 62 for the period of time it takes the axially projecting portion 94 to reach the hole 73.
  • ferrule 26 contacts the wheel 76 of the spring-loaded lever or kickout means 70 causing lever 70 to rotate in the direction of rotation 84 about pivot pin or rod 72 to charge the spring 78. This operation will continue until the actually projecting portion 94 is engaged or captured by outer perimeter of hole 73 as described previously.
  • a dropout fuse assembly comprising:
  • a chargeable spring means disposed to be mechanically charged upon engagement of said first ferrule with said unitary latch-guide means by moving about a pivot point on a portion of said latch guide means to a charged position from which said spring member may move against said first ferrule of said fuse means during an opening operation of said dropout fuse assembly to assist inactuating said fuse means during said opening operation;

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US00291467A 1972-09-22 1972-09-22 Latch and guide assembly for a dropout electrical fuse Expired - Lifetime US3774137A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US29146772A 1972-09-22 1972-09-22

Publications (1)

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US3774137A true US3774137A (en) 1973-11-20

Family

ID=23120414

Family Applications (1)

Application Number Title Priority Date Filing Date
US00291467A Expired - Lifetime US3774137A (en) 1972-09-22 1972-09-22 Latch and guide assembly for a dropout electrical fuse

Country Status (3)

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US (1) US3774137A (no)
JP (1) JPS5257409Y2 (no)
CA (1) CA977801A (no)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5274349A (en) * 1992-09-17 1993-12-28 Cooper Power Systems, Inc. Current limiting fuse and dropout fuseholder for interchangeable cutout mounting
US5440287A (en) * 1992-09-17 1995-08-08 Cooper Industries, Inc. Current responsive latching apparatus for disconnecting and isolating an electrical device
US5463366A (en) * 1992-09-17 1995-10-31 Cooper Industries, Inc. Current limiting fuse and dropout fuseholder
US5485136A (en) * 1992-09-17 1996-01-16 Cooper Industries, Inc. Load break disconnecting device with solid arc suppression means
US5583729A (en) * 1992-09-17 1996-12-10 Cooper Industries, Inc. Terminal bushing having integral overvoltage and overcurrent protection
US5936506A (en) * 1992-09-17 1999-08-10 Cooper Industries, Inc. Delay mechanism for retarding relative movement between two members
US6359229B1 (en) * 1999-05-26 2002-03-19 George J. Larson Power line fuse bypass
US20060174638A1 (en) * 2004-12-20 2006-08-10 Riopka William W Switch with improved protection from ice conditions
US9245705B1 (en) 2014-09-04 2016-01-26 Ryan Beers Cutout box fuse bypass jumper

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2399495A (en) * 1944-03-06 1946-04-30 Gen Electric Circuit interrupter
US3267235A (en) * 1962-10-24 1966-08-16 S & C Electric Co Dropout fuse for high voltage electric power circuits
US3447114A (en) * 1967-08-24 1969-05-27 Westinghouse Electric Corp Dropout fuse structure

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3002070A (en) * 1960-09-01 1961-09-26 Mc Graw Edison Co Fuse cutout

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2399495A (en) * 1944-03-06 1946-04-30 Gen Electric Circuit interrupter
US3267235A (en) * 1962-10-24 1966-08-16 S & C Electric Co Dropout fuse for high voltage electric power circuits
US3447114A (en) * 1967-08-24 1969-05-27 Westinghouse Electric Corp Dropout fuse structure

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5274349A (en) * 1992-09-17 1993-12-28 Cooper Power Systems, Inc. Current limiting fuse and dropout fuseholder for interchangeable cutout mounting
US5355111A (en) * 1992-09-17 1994-10-11 Cooper Power Systems, Inc. Nested contact and cap assembly for fuseholder
US5440287A (en) * 1992-09-17 1995-08-08 Cooper Industries, Inc. Current responsive latching apparatus for disconnecting and isolating an electrical device
US5463366A (en) * 1992-09-17 1995-10-31 Cooper Industries, Inc. Current limiting fuse and dropout fuseholder
US5485136A (en) * 1992-09-17 1996-01-16 Cooper Industries, Inc. Load break disconnecting device with solid arc suppression means
US5559488A (en) * 1992-09-17 1996-09-24 Cooper Industries, Inc. Current limiting fuse having compact structure
US5583729A (en) * 1992-09-17 1996-12-10 Cooper Industries, Inc. Terminal bushing having integral overvoltage and overcurrent protection
US5760673A (en) * 1992-09-17 1998-06-02 Cooper Industries, Inc. Current limiting fuse and dropout fuseholder
US5805046A (en) * 1992-09-17 1998-09-08 Cooper Industries, Inc. Current responsive latching apparatus for disconnecting and isolating an electrical device
US5936506A (en) * 1992-09-17 1999-08-10 Cooper Industries, Inc. Delay mechanism for retarding relative movement between two members
US6359229B1 (en) * 1999-05-26 2002-03-19 George J. Larson Power line fuse bypass
US20060174638A1 (en) * 2004-12-20 2006-08-10 Riopka William W Switch with improved protection from ice conditions
US7223928B2 (en) * 2004-12-20 2007-05-29 S&C Electric Canada Ltd. Switch with improved protection from ice conditions
US9245705B1 (en) 2014-09-04 2016-01-26 Ryan Beers Cutout box fuse bypass jumper

Also Published As

Publication number Publication date
JPS4989639U (no) 1974-08-03
JPS5257409Y2 (no) 1977-12-26
CA977801A (en) 1975-11-11

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