EP0924728B1 - High-voltage circuit breaker for high currents - Google Patents

High-voltage circuit breaker for high currents Download PDF

Info

Publication number
EP0924728B1
EP0924728B1 EP19980204267 EP98204267A EP0924728B1 EP 0924728 B1 EP0924728 B1 EP 0924728B1 EP 19980204267 EP19980204267 EP 19980204267 EP 98204267 A EP98204267 A EP 98204267A EP 0924728 B1 EP0924728 B1 EP 0924728B1
Authority
EP
European Patent Office
Prior art keywords
circuit breaker
spring
opening
insulator
rod
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
EP19980204267
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0924728A2 (en
EP0924728A3 (en
Inventor
Costante Piazza
Libero Sfondrini
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.)
ABB Trasmissione e Distribuzione SpA
Original Assignee
ABB Power Technologies SpA
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 ABB Power Technologies SpA filed Critical ABB Power Technologies SpA
Publication of EP0924728A2 publication Critical patent/EP0924728A2/en
Publication of EP0924728A3 publication Critical patent/EP0924728A3/en
Application granted granted Critical
Publication of EP0924728B1 publication Critical patent/EP0924728B1/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
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/42—Driving mechanisms

Definitions

  • the present invention relates to a circuit breaker for high-voltage currents.
  • circuit breakers for high-voltage currents must be actuated quickly and promptly.
  • the use of direct actuators of the electromechanical type would entail devices of unacceptable size; accordingly, systems for accumulating mechanical energy are generally used. Energy accumulation occurs over a few hundred seconds. Energy is then used and delivered over a few tens of milliseconds.
  • Patent application nr. FR-A-2589001 discloses a mechanism for operating circuit-breaker and suitable for causing a circuit-breaker to perform a rapid opening-closing-re-opening cycle.
  • a first spring is coaxially arranged around an operating rod that moves the movable contacts of the circuit breaker.
  • a second spring is arranged around a cylinder that surrounds the first spring.
  • Patent application nr. EP 788126 discloses a switch for hieh-voltage current, which is provided with a movable contact that can be actuated by means of an actuation rod made of insulating material.
  • the actuation rod accommodates a spring, which is operatively connected between the actuation rod and the body of the insulator that accommodates the switch.
  • Patent nr. US-5504289 discloses a switching mechanism for a high voltage circuit breaker.
  • the disclosed mechanism comprises a first spring and a second spring that is positioned coaxially with the first spring.
  • An operating rod member is operatively associated to said springs and to the movable contacts of the circuit breaker.
  • Main aim of the present invention is to provide a circuit breaker for high-voltage currents which allows to eliminate the complicated stroke multiplying mechanisms required to transmit motion to the movable parts of the pole of the circuit breaker.
  • an object of the present invention is to provide a circuit breaker for high-voltage currents which allows to reduce the energy required to transmit motion to the movable contacts of said circuit breaker so as to improve its performance in terms of speed and promptness of intervention.
  • Another object of the present invention is to provide a circuit breaker for high-voltage currents with a pole having a smaller number of components, a reduced weight and, insulation levels being equal, smaller size.
  • the circuit breaker according to the invention comprises a pole which is constituted by an insulator 4, by fixed contacts 1 and by movable contacts 2.
  • An electric power tap 3 protrudes from the insulator and supports a movable contact holder 10 by means of an intermediate flange 11.
  • elastic means which are conveniently constituted by two springs 6 and 7, respectively for opening and for closure, which are made of insulating material.
  • the opening spring 6 one end is connected to a movable drive rod 5, which is also made of insulating material and which, by actuating the movable contacts 2, allows to open and close the circuit breaker, and the other end is fixed to the flange 11.
  • the closure spring 7 one end is coupled to sliding support means 12 which are connected, by means of a tube 13, to circuit breaker actuation means 8, and the other end is connected to the flange 11.
  • the tube 13 is coupled to the drive rod 5 through engagement means 16 which are fixed to the tube 13 and have a pawl that engages a slot formed in the rod 5.
  • the circuit breaker actuation means 8 comprise a gearmotor 31, a worm screw 36, two electrical engagement devices 34 and 35, and two engagement means 19 and 20 and are directly connected to the flange 9 of the insulator 4 by means of the flange 14. In this manner they are rigidly coupled to the base of the insulator 4.
  • the gearmotor 31 starts by means of the stroke limiter switch 32 and can reload the closure spring 7 which, at the end of its loading, engages the engagement means 19; the wheel of the gearmotor disengages from the worm screw 36 and the gearmotor stops due to the stroke limiter 33.
  • Opening of the contacts which can be performed if necessary also during the reloading of the closure spring, occurs by energizing the electromagnet 34. In this manner, the engagement means 20 are released and the opening spring 6, as it is released, pushes down the rod 5, which opens the contacts.
  • circuit breaker according to the invention it is possible to perform quick opening-closure-opening with the following sequence.
  • the engagement means 19 are released and the circuit breaker, as described above, closes. In this situation, the opening spring is loaded and the insulating rod 5 is engaged with the engagement means 20.
  • the circuit breaker By re-energizing the electromagnet 34, the circuit breaker reopens.
  • Auxiliary contacts 18 of the insulator are switched at each actuation.
  • the opening and closure springs are contained in the insulator 5 of the pole of the circuit breaker and are made of insulating material.
  • the opening spring 3 one end is fixed to a flange 30 and the other end is fixed to an insulating rod 50 which, by actuating the movable contacts 2, allows to open and close the circuit breaker.
  • the closure spring 4 one end is fixed to the flange 30, while the other end is connected to a system constituted by a linkage 61 and a lever 62.
  • the actuating means comprise two electric engagement devices 39 and 41 and a gearmotor 42.
  • the closure spring 4 is loaded (compressed) and the opening spring 3 is released, energization of the electrical engagement device 40 releases the kinematic chain 62, 61 and 4.
  • the closure spring 4 is released and, by elongating, pushes the lever 62 which, by means of the linkage 63 and the levers 64 and 65, moves upward the rod 50, which causes the closure of the contacts and the loading (by compression) of the opening spring 3.
  • the lever 64 engages the electrical engagement device 41; at the same time, the lever 66 disengages the lever 64 from the lever 62, making the opening mechanism independent of the closure mechanism.
  • the gearmotor 42 can thus reload the closure spring 4.
  • the spring 4 engages the electrical engagement device 40 and the gearmotor 42 disengages from the lever 62 by means of a disengagement device 43.
  • the opening of the contacts which can be performed if necessary also during reloading of the closure spring, occurs by energizing the electrical engagement device 41, which releases the lever 64.
  • the opening spring 3 is no longer retained and is released, pushing the rod 50, which opens the contacts.
  • circuit breaker according to the invention is the fact that the insulator of the pole is monolithically made of composite material coated with polymeric material. Accordingly, this allows to reduce the number of components of the pole, its weight and, insulation levels being equal, its size.

Landscapes

  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Circuit Breakers (AREA)
  • Relay Circuits (AREA)
  • Circuit Arrangements For Discharge Lamps (AREA)
  • Oscillators With Electromechanical Resonators (AREA)
EP19980204267 1997-12-17 1998-12-16 High-voltage circuit breaker for high currents Expired - Lifetime EP0924728B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI972795 IT1296880B1 (it) 1997-12-17 1997-12-17 Interruttore per correnti ad alta tensione
ITMI972795 1997-12-17

Publications (3)

Publication Number Publication Date
EP0924728A2 EP0924728A2 (en) 1999-06-23
EP0924728A3 EP0924728A3 (en) 2001-03-28
EP0924728B1 true EP0924728B1 (en) 2007-01-24

Family

ID=11378388

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19980204267 Expired - Lifetime EP0924728B1 (en) 1997-12-17 1998-12-16 High-voltage circuit breaker for high currents

Country Status (3)

Country Link
EP (1) EP0924728B1 (it)
DE (1) DE69836952T2 (it)
IT (1) IT1296880B1 (it)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015208268A1 (de) * 2015-05-05 2016-11-10 Siemens Aktiengesellschaft Elektrisches Schaltgerät und entsprechende Schaltungsanlage
EP3204958A1 (en) * 2015-05-28 2017-08-16 SFA Elektromekanik Elektrik Sanayi Ve Ticaret Anonim Sirketi Switching mechanism comprising the combination of breaker, separator and grounding apparatus
DE102015218443A1 (de) * 2015-09-25 2017-03-30 Siemens Aktiengesellschaft Antrieb und Verfahren zum Antreiben eines Leistungsschalters
KR101918237B1 (ko) * 2017-03-28 2018-11-13 엘에스산전 주식회사 고속스위치

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH660256A5 (de) * 1983-01-25 1987-03-31 Sprecher Energie Ag Antriebsanordnung fuer einen hochspannungsschalter.
FR2589001A1 (fr) * 1985-10-23 1987-04-24 Alsthom Dispositif de manoeuvre d'un disjoncteur et disjoncteur muni de ce dispositif
US5508487A (en) * 1994-03-30 1996-04-16 Abb Power T&D Company Inc. High voltage circuit interrupting device operating mechanism including trip latch assembly
US5504289A (en) * 1994-03-30 1996-04-02 Abb Power T&D Company Inc. Circuit switching mechanism and charging system therefor
IT1282078B1 (it) * 1996-02-02 1998-03-09 Abb Research Ltd Interruttore per corrente ad alta tensione

Also Published As

Publication number Publication date
DE69836952D1 (de) 2007-03-15
ITMI972795A1 (it) 1999-06-17
IT1296880B1 (it) 1999-08-02
DE69836952T2 (de) 2007-11-08
EP0924728A2 (en) 1999-06-23
EP0924728A3 (en) 2001-03-28

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