US3624327A - Liquid-poor power circuit breaker - Google Patents

Liquid-poor power circuit breaker Download PDF

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Publication number
US3624327A
US3624327A US73036A US3624327DA US3624327A US 3624327 A US3624327 A US 3624327A US 73036 A US73036 A US 73036A US 3624327D A US3624327D A US 3624327DA US 3624327 A US3624327 A US 3624327A
Authority
US
United States
Prior art keywords
slider
switching
tube
mechanism housing
switching chamber
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
US73036A
Other languages
English (en)
Inventor
Siegfried Jahrig
Irmgard Rehner
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.)
Siemens AG
Siemens Corp
Original Assignee
Siemens 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 claimed from DE19691948079 external-priority patent/DE1948079C3/de
Application filed by Siemens Corp filed Critical Siemens Corp
Application granted granted Critical
Publication of US3624327A publication Critical patent/US3624327A/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
    • H01H9/52—Cooling of switch parts
    • 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
    • H01H9/52—Cooling of switch parts
    • H01H2009/526—Cooling of switch parts of the high voltage switches

Definitions

  • the liquid-poor power circuit breaker has a vertical pole column composed of a metallic mechanism housing, a switching chamber above the housing, and a metallic switching head on top of the chamber.
  • a circulatory system for-quenching liquid includes a thin insulating tube between the switching head and the mechanism housing outside of the switching chamber.
  • a slider coupled with the movable switch pin of the power breaker blocks the insulating tube when the switch pin is in the break position.
  • a liquid-poor power circuit breaker having a vertical column composed of a metallic mechanism housing, a switching chamber above the housing, and a metallic switch head on top of the switching chamber.
  • the circuit breaker is provided with a circulation system for circulating quenching-liquid by thermosyphon action.
  • the switching head and the mechanism housing are connected outside of the switching chamber by means of a thin tube made of insulating material, the tube being thin in relation to the switching chamber.
  • the tube enables the circulation system to include a path outside of the switchingchamber. This arrangement enables a cooling action to be achieved so that the breaker may be installed with a single switching chamber, that is, without parallel switching chambers, to accommodate the largest rated current in the mid and high voltage area up to the present time.
  • the insulating tube connecting the switching head with the mechanism housing is blocked by a slider when the switch pin of the circuit breaker moves to open the latter, the slider being coupled with the movable switch pin.
  • the liquid circulation system stands available for cooling when the current flowing through the circuit breaker introduces heat losses.
  • First in the open circuit condition position is the liquid circulation produced by thermosyphon action interrupted.
  • the interior of the switching chamber can be viewed as a sealed space wherein the light arc or a mechanical pumping action can develop the pressure necessary to extinguish the are without requiring a pressure balance via the insulating tube serving for cooling purposes.
  • the slider member is arranged at the lower portion of the insulating tube and is directly connected with the switching pin.
  • direct is meant that no connection is provided that influences the movement relationship of the slider and the switch pin.
  • the slider makes the same movement as does the switching pin.
  • a covering over of the upper end of the insulating tube can in most instances be dispensed with since this opening lies in the vicinity of the switching head of the circuit breaker, so that at this location no significant overpressure is to be expected which could damage the insulating tube.
  • the slider is configured as a tubular member having a bore which works together with a bore of the mechanism housing.
  • the slider is configured as a tube of which one end is connected to the insulating tube and which works in cooperative relation with a bore of the mechanism housing.
  • the mechanism housing is then used as a portion of the arrange ment needed for blocking the flow of liquid. This is achieved by arranging the connecting bore joining into the insulating tube so as to open into a bore corresponding to the cross section of the tube used as a slider.
  • the control of a passage of sufficiently large cross section with a small movable mass is achieved with a slider.
  • quenching liquid issuing from the insulating tube can be directed to the lower portion of the mechanism housing. In this manner the deepest portions of the circuit breaker that participate in developing heat are reached with cooled quenching liquid without the necessity of bringing the insulating tube to the deepest location of the mechanism housing.
  • the drawing illustrates one pole of a liquid-poor power circuit breaker for medium voltage for example 10 kw. and 4000 A. rated current and is usually constructed as a three-pole assembly.
  • Each pole has a pole column that is vertically positioned and is provided with supporting insulators for mounting on an actuating housing; the latter is not illustrated in the drawing.
  • the pole columns have a metallic mechanism housing 1.
  • a driving shaft 2 is borne within the housing 1 and passes liquidtight trough the metallic housing.
  • the drive shaft is coupled with a hollow switch pin 5 by a crank 3 and link member 4.
  • the switch pin 5 is in electrical connection with the current lead-in rods 7 via contact roller pairs 6.
  • the switching chamber 10 contains a fixedly positioned switching member 11.
  • the insulating portions 12 and 13 are mounted on the wall of the switching chamber 10 and function to direct the oil required for quenching the light are that occurs when the circuit breaker opens, the pole column being filled with this oil.
  • a switching head 15 On top of the switching chamber 10 is secured a switching head 15.
  • the fixedly mounted switching member 11 is connected with the switching head 15 via a star-shaped carrier 16.
  • the current flows via carrier part 16 to a not illustrated connection surface on the switching head 15.
  • a similar connecting surface on the mechanism housing is connected with the switching pin 5 via the current lead-in rod 7.
  • a metal elbow 20 is secured to the switching head 15 and has bores which run toward each other at right angles; one bore 21 communicates with the switching head 15 while the other bore communicates with a tube 22 made of insulating material.
  • Tube 22 is spatially disposed parallel to the switching chamber 10 and ends in an elbow member 23 that is configured like the elbow 20 and is connected to a bore 24 of the mechanism housing 1.
  • the bore 24 functions in cooperative relation with a tubular body 26 as a slider on the inner side of the mechanism housing 1, the slider being movable in a direction parallel to the switching pin 5 with the assistance of a guide 27.
  • the tubular body 26 is starlike coupled with a guiding member 28 through the assistance of two attachments.
  • the guide member 28 is screw connected to the switching pin 5 and constitutes the mounting location for the linking member 4.
  • the tubular body 26 together with the wall of the mechanism housing in the region of the bore 24 controls the circulation of the quenching liquid through the tube 22, the liquid serving to cool the circuit breaker.
  • the quenching medium heated by means of the heat losses in the circuit breaker can enter the tube 22 from the switching head 15 in the direction of the arrow 30.
  • the quenching liquid is cooled in the insulating tube 22 because in this region no heat can be developed, whereas, the heat given off to the air surrounding breaker is much stronger than the heat imparted to the switching chamber itself. This occurs among other reasons because the diameter of the insulating tube 22 is substantially smaller than the diameter of the switching chamber. In the illustrated embodiment the insulating tube diameter is only about one-quarter of the switching chamber diameter.
  • the cooled quenching liquid flows in the direction of the arrow 31 at the bottom end of the insulating tube 22 through bore 24 and a corresponding opening 32 of the tube member 26 in the lower portion of the mechanism housing.
  • the tube member 26 directs the cooled liquid to locations beneath the bore 24 from where the quenching liquid can again travel upwardly with increasing heat along the current passover locations between the switching pin 5 and the current lead-in rods 7.
  • the quenching medium also passes between the insulating members 12 and 13 of the quenching chamber as indicated by arrow 34 as well as into the bore 35 of the switching rod 5.
  • the cooling liquid flows further around the fixedly positioned switching member 1] as indicated by arrow 37 as well as through the switching member as shown by arrow 36 until the warm quenching medium is a region of bore 21 of the switching head 15.
  • the tube body 26 moves downwardly directly and simultaneously with the switching pin 5. Therefore, the bore 24 in the mechanism housing is closed before the point of the switching rod leaves the fixedly position switching member 11. Now the switching pin 5 extending further into the mechanism housing can develop a pressure that causes a flow of the quenching liquid through the bore of the switching rod 5 and into the switching head. When the light arc is formed, the pressure developed by the quenching liquid decomposed by the arcing action can effectively act in the same direction.
  • the circulation of fluid is checked in the open circuit position of the circuit breaker of the illustrated embodiment.
  • the circulation of the cooling medium in the open circuit position of the breaker can be renewed in the lower portions of the tube body 26 and the switching pin 5.
  • the circuit breaker of the invention can also be configured so that with a single tube body 5, the lower connections of several insulating tubes arranged parallel to the switching chamber can be controlled on a mechanism housing.
  • a switching chamber can be provided with several parallel insulating tubes wherein each tube has it own slider.
  • Liquid-poor power circuit breaker comprising a vertical pole column having a metallic mechanism housing, a switching chamber above said housing and a metallic switch head supported above said switching chamber, circulation means for providing a quenching liquid circulation by thermosyphon action, an insulating tube which is thin in comparison with said switching chamber and which connects said switch head with said mechanism housing outside of the switching chamber, said tube forming part of said circulation means, a slider for selectively blocking and opening said tube, circuit interrupting means disposed in said switching chamber and comprising an axially displaceably switch pin, said slider being coupled with said switch pin to block said tube when said switch pin is in circuit breaking position.

Landscapes

  • Circuit Breakers (AREA)
  • Multiple-Way Valves (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
US73036A 1969-09-18 1970-09-17 Liquid-poor power circuit breaker Expired - Lifetime US3624327A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19691948079 DE1948079C3 (de) 1969-09-18 Flüssigkeitsarmer Leistungsschalter

Publications (1)

Publication Number Publication Date
US3624327A true US3624327A (en) 1971-11-30

Family

ID=5746273

Family Applications (1)

Application Number Title Priority Date Filing Date
US73036A Expired - Lifetime US3624327A (en) 1969-09-18 1970-09-17 Liquid-poor power circuit breaker

Country Status (3)

Country Link
US (1) US3624327A (enrdf_load_stackoverflow)
JP (1) JPS5016510B1 (enrdf_load_stackoverflow)
CH (1) CH515603A (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106356241A (zh) * 2016-11-15 2017-01-25 通用森源（深圳）电气有限公司 一种高稳定性高压真空断路器
CN106531545A (zh) * 2016-11-15 2017-03-22 通用森源（深圳）电气有限公司 一种高压真空断路器

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62163688U (enrdf_load_stackoverflow) * 1986-04-07 1987-10-17

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2724756A (en) * 1951-07-11 1955-11-22 Siemens Ag Low liquid-content power-circuit breakers
FR1145488A (fr) * 1956-02-24 1957-10-25 Perfectionnements apportés aux disjoncteurs pour courants électriques de haute tension
US2909633A (en) * 1957-02-11 1959-10-20 Donald M Umphrey High tension oil switch
FR1281324A (fr) * 1960-11-28 1962-01-12 Perfectionnements aux disjoncteurs hydrauliques à grand pouvoir de coupure
FR1381892A (fr) * 1963-02-18 1964-12-14 Siemens Ag Disjoncteur électrique à liquide

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2724756A (en) * 1951-07-11 1955-11-22 Siemens Ag Low liquid-content power-circuit breakers
FR1145488A (fr) * 1956-02-24 1957-10-25 Perfectionnements apportés aux disjoncteurs pour courants électriques de haute tension
US2909633A (en) * 1957-02-11 1959-10-20 Donald M Umphrey High tension oil switch
FR1281324A (fr) * 1960-11-28 1962-01-12 Perfectionnements aux disjoncteurs hydrauliques à grand pouvoir de coupure
FR1381892A (fr) * 1963-02-18 1964-12-14 Siemens Ag Disjoncteur électrique à liquide

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106356241A (zh) * 2016-11-15 2017-01-25 通用森源（深圳）电气有限公司 一种高稳定性高压真空断路器
CN106531545A (zh) * 2016-11-15 2017-03-22 通用森源（深圳）电气有限公司 一种高压真空断路器
CN106356241B (zh) * 2016-11-15 2018-06-26 通用森源（深圳）电气有限公司 一种高稳定性高压真空断路器

Also Published As

Publication number Publication date
DE1948079B2 (de) 1972-06-22
CH515603A (de) 1971-11-15
JPS5016510B1 (enrdf_load_stackoverflow) 1975-06-13
DE1948079A1 (de) 1971-04-08

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