US1745187A - Circuit interrupter - Google Patents

Circuit interrupter Download PDF

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Publication number
US1745187A
US1745187A US125570A US12557026A US1745187A US 1745187 A US1745187 A US 1745187A US 125570 A US125570 A US 125570A US 12557026 A US12557026 A US 12557026A US 1745187 A US1745187 A US 1745187A
Authority
US
United States
Prior art keywords
circuit
coil
blowout
arc
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
US125570A
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English (en)
Inventor
William E Paul
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.)
General Electric Co
Original Assignee
General Electric Co
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 BE343786D priority Critical patent/BE343786A/xx
Application filed by General Electric Co filed Critical General Electric Co
Priority to US125570A priority patent/US1745187A/en
Priority to GB18697/27A priority patent/GB275208A/en
Priority to FR33937D priority patent/FR33937E/fr
Application granted granted Critical
Publication of US1745187A publication Critical patent/US1745187A/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
    • 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
    • H01H9/44—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet

Definitions

  • This invention relates to circuit interrupters, particularly those having magnetic blow out coils arranged to be connected in the arc circuit for rupturing the are occurring upon interruption of the circuit.
  • blowout coil In an interrupter of the above type it is common practice to arrange the blowout coil so that it is connected in shunt with the main circuit while the interrupter is closed, thereby eliminating a loss of energy in the coil during the normal operating conditions and permitting a coil of relatively small cross sec tion to be used.
  • the blowout magnet With such an arrangement the blowout magnet is. so connected that it is energized by the current in the arc circuit immediately upon the opening operation of the interrupter.
  • This ordinarily is accomplished by providing the circuit interrupter with an auxiliary arcing contact through which the blowout coil is connected in the circuit after the main current carrying contact is opened.
  • the auxiliary arcing contact arrangement is intended to localize the arcing at the auxiliary contact which is subjected to the action of the blowout coil.
  • the principal object of my present invention is to overcome the above difficulty by counteracting or substantially neutralizing the reactance of the blowout coil when it is initially inserted in the arc circuit.
  • this may be accomplished by providing a closed circuit or winding in inductive relation with the blowout coil so as to effectively counteract. or neutralize the reactance thereof.
  • the closed circuit then is arranged to be opened after the main current carrying contact of the interrupter is opened, thereby permitting the blowout coil to supply its full value of blowout flux for dissipating the are occurring at the auxiliary arcing contact.
  • FIG. 1 is a side view of the interrupter with certain parts in section
  • Fig. 2 is a back view of the interrupter showing more in detail the arrangement of the closed circuit in inductive relation with the blowout coil.
  • the circuit interrupter comprises a main current carrying contact 10, which is pivotally mounted upon the base 11 so as to bridge the main circuit contact terminals 12 and 13.
  • the interrupter also is provided with the auxiliary arcing contact 14, which is arranged to en gage with the cooperating arcing terminal 15, before closureof the main contact 10, as well as to disengage the contact 15 after the openin of the main contact.
  • the blowout coil 16 is connected between the main circuit terminal 12 and the arcing contact 15 so as to be inserted in the arc circuit upon the opening operation of the interrupter.
  • the blowout coil 16, in accordance with the usual practice, is wound about and suitably insulated from the core 17 of mag netic material, from the ends of which the blowout flux conducting plates 18 and 19 extend on the outside of the restricting arc chute formed by the walls 20 and 21.
  • the arcing contact 14 and terminal 15 are enclosed within the restricted arc chute so that the are drawn therebetween is subjected to the strong blowout action of the flux passing between the plates 18 and 19 through the arc chute.
  • a winding 22 of relatively low resistance is formed about the blowout coil 16 so as to constitute a closed circuit in inductive relation with the blowout coil 16.
  • a suitable insulating ring 23 serves to insulate the auxiliary winding 22 from the voltage impressed upon the blowout coil 16.
  • the continuity of the closed circuit formed by the low resistance winding 22 is controlled by the switch member 24 WhlCh is associated with the movable contact 10 of ithe' circuit interrupter to be operated consecutivel therewith.
  • the switch 24 is thus arrange to be opened after the opening of the main interrupter contact 10 and before the opening of the auxiliary arcing contact 14 of the interrupter.
  • the closed circuit formed by the winding 22 is effective to counteract orneutralize the reactance of the blowout coil 16 and thereby control the impedance of the coil when the main cur.- rent carrying contact 10 of the interrupter 1S opened.
  • the neutralizing action of the winding 22 is discontinued thereby permitting the blowout coil 16 to magnetize the magnetic blowout flux path to full value preparatory to theopening of the arcing contact 14.
  • a magnetic arc blowout coil means for connecting the blowout coil to be energized in accordance with the current in the arc circuit to set up a blowout flux transverse the arc path, and electrical means controlled by said first means for temporarily reducing the reactance of the coil while the coil is being energized.
  • a circuit-controlling switch a magnetic blowout coil connected to be energized in accordance with the current in the arc occurring upon the opening of the switch, and electrical-means controlled by said switch for temporarily preventing the building up of a reactive voltage across the terminals of the blowout coil when the switch is opened.
  • circuit interrupting device having three circuit controlling elements operable in sequence, a magnetic arc blowout coil connected to be inserted in the arc circuit upon operation of the first element, electrical means controlled by the second element for temporarily substantially neutralizing the reactance of said coil when the coil is inserted in the arc circuit, and means con-. trolled by the third element for establishing an are under the magnetic influence of said are blowout coil.
  • circuit interrupter having a movable switch member, a magnetic arc blowout connected to be short circuited by said member when the member is in the closed position and inserted in the arc circuit when the member is operated to the open position, and electrical means for preventing the building up of a reactive voltage across the terminals of the blowout coil when the coil is initially inserted in'the arc circuit.
  • circuit interrupter having a movable switch member, a magnetic arc blowout coil connected to be short oircuited by said switch member when the member is in the closed position and inserted in the arc circuit when the member is operated to the open position, a closed circuitinductively related with said blowout coil for counteracting the reactance thereof when the blowout coil is initially inserted in the arc circuit, and means responsive to predetermined movement of said switch member toward the open position for opening said circuit.
  • circuit interrupter having a main current carrying contact and a secondary arcing contact, arranged to be operated in sequence upon the opening of the interrupter, a blowout coil connected in circuit with said arcing contact to be energized in accordance with the current in the are produced upon the opening thereof, a short circuited winding for substantially neutralizing the reactance of said coil when the main contact is opened, and switch mechanism for open circuiting said winding before the arcing contact is opened.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
US125570A 1922-01-24 1926-07-28 Circuit interrupter Expired - Lifetime US1745187A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
BE343786D BE343786A (en(2012)) 1926-07-28
US125570A US1745187A (en) 1926-07-28 1926-07-28 Circuit interrupter
GB18697/27A GB275208A (en) 1926-07-28 1927-07-14 Improvements in and relating to electric circuit interrupters
FR33937D FR33937E (fr) 1922-01-24 1927-07-27 Perfectionnements aux interrupteurs électriques

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US125570A US1745187A (en) 1926-07-28 1926-07-28 Circuit interrupter

Publications (1)

Publication Number Publication Date
US1745187A true US1745187A (en) 1930-01-28

Family

ID=22420351

Family Applications (1)

Application Number Title Priority Date Filing Date
US125570A Expired - Lifetime US1745187A (en) 1922-01-24 1926-07-28 Circuit interrupter

Country Status (3)

Country Link
US (1) US1745187A (en(2012))
BE (1) BE343786A (en(2012))
GB (1) GB275208A (en(2012))

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2611060A (en) * 1945-10-20 1952-09-16 Monitor Controller Co Circuit controlling apparatus
US2697154A (en) * 1951-05-26 1954-12-14 Westinghouse Electric Corp Circuit interrupter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2611060A (en) * 1945-10-20 1952-09-16 Monitor Controller Co Circuit controlling apparatus
US2697154A (en) * 1951-05-26 1954-12-14 Westinghouse Electric Corp Circuit interrupter

Also Published As

Publication number Publication date
GB275208A (en) 1928-03-01
BE343786A (en(2012))

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