CN1070512A - A kind of equipment that is used for interrupting current without natural zero-crossing - Google Patents

A kind of equipment that is used for interrupting current without natural zero-crossing Download PDF

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Publication number
CN1070512A
CN1070512A CN 92110512 CN92110512A CN1070512A CN 1070512 A CN1070512 A CN 1070512A CN 92110512 CN92110512 CN 92110512 CN 92110512 A CN92110512 A CN 92110512A CN 1070512 A CN1070512 A CN 1070512A
Authority
CN
China
Prior art keywords
arc
circuit breaker
equipment
contact
breaking capacity
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.)
Pending
Application number
CN 92110512
Other languages
Chinese (zh)
Inventor
丹尼斯·杜夫尼特
米切尔·皮瑞特
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.)
Alstom Holdings SA
Original Assignee
GEC Alsthom SA
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 GEC Alsthom SA filed Critical GEC Alsthom SA
Publication of CN1070512A publication Critical patent/CN1070512A/en
Pending 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
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/12—Auxiliary contacts on to which the arc is transferred from the main contacts
    • H01H33/121—Load break switches
    • 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
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/14—Multiple main contacts for the purpose of dividing the current through, or potential drop along, the arc
    • H01H33/143—Multiple main contacts for the purpose of dividing the current through, or potential drop along, the arc of different construction or type
    • 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
    • H01H33/006—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means adapted for interrupting fault currents with delayed zero crossings
    • 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
    • H01H33/59—Circuit arrangements not adapted to a particular application of the switch and not otherwise provided for, e.g. for ensuring operation of the switch at a predetermined point in the ac cycle
    • 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
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/98—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being initiated by an auxiliary arc or a section of the arc, without any moving parts for producing or increasing the flow

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  • Circuit Breakers (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)

Abstract

Be used to interdict the not breaker apparatus of natural zero-crossing electric current, the characteristics of this equipment are that it comprises two circuit breakers that are in series, and a circuit breaker (100) has good breaking capacity; A circuit breaker (200) has more weak breaking capacity, but is provided with the device that is used to elongate electric arc and increases arc voltage.

Description

A kind of equipment that is used for interrupting current without natural zero-crossing
The present invention relates to a kind of on electric the equipment of blocking current without natural zero-crossing.
The modern electric net just uses increasing series compensation to be used for voltage levvl on the control circuit by means of capacitor.If break down, its consequence is the electric current that zero passage can occur not containing, and this electric current can be referred to as " non-zero passage " electric current.
In order to extinguish the electric arc that when contact separates, produces, present sulphur hexafluoride (SF 6) circuit breaker requires this electric current to pass through null value.This passing through may be nature, and every half period takes place once under symmetrical operating mode.This passing through under the situation that also may force current over-zero at the circuit breaker arc blow-out produced by " copped wave ".Pacify to 20 ampere-hours when this electric current surpasses 15, if there is not for example oscillation circuit of optional equipment, then circuit breaker can not force current over-zero.
An object of the present invention is to provide a kind of breaker apparatus that can both make current over-zero in all cases, thereby make conventional SF 6Circuit breaker might blow-out.
Principle of the present invention is based on the actuality that requires target for reaching, and this need increase arc voltage so that reduce the aperiodic component of fault current.
The invention provides a kind of breaker apparatus is not used for interdicting and can passes through the electric current of null value naturally, the characteristics of this equipment are, it is in series by a circuit breaker with good breaking capacity and the circuit breaker with more weak breaking capacity and forms, and the latter has the device that is used to extend electric arc and increases arc voltage.
In a certain embodiments, the circuit breaker with low breaking capacity comprises a can, is full of the gas with good insulation characteristic in it, for example sulphur hexafluoride; First and second arc contacts; This second arc contact is movable by means of a driving mechanism; Also have the arc blow-out nozzle of this second arc contact by wherein, and be used for making this first arc contact along the device that moves with the second arc contact rightabout, its motion originates in the moment that this arc contact begins to separate.
Above-mentioned first contact is fixed on the piston that moves in cylinder and obtains this moving is very easily.Under the effect of the heat that electric arc produced, the blocking chamber that is arranged in arc blow-out nozzle upstream place pressure occurs and increases, and this piston is moved.
The present invention can not obscure mutually with the equipment described in file EP-A2-0239783, this document has been described two circuit breakers that are associated, one of them blocking resistive and inductive load, and another disconnects than first slightly a little later, the breaking cpacity electric current.In this circuit, there is not problem that does not have the electric current of zero passage of blocking.
Above-mentioned situation also is suitable for file DPS641604, and it has described the equipment of being made up of the block switch of a circuit breaker and a series connection with it, and this block switch disconnects early than this circuit breaker, and is also different with the present invention.This equipment is not suitable for interdicting the electric current that does not have zero passage.
Please refer to accompanying drawing, wherein:
Fig. 1 is the curve chart of an asymmetric fault;
Fig. 2 is the block diagram of a present device;
Fig. 3 is the employed axial section that extends the electric arc circuit breaker of current trip device of the present invention.
Fig. 1 is the current curve diagram after a fault occurs.This curve shows this electric current around aperiodic component i pThe minimum value that is presented behind the vibration several times.
Fig. 2 shows that breaker apparatus of the present invention comprises two circuit breakers that are in series, and reference number is that 100 circuit breaker has good electric current breaking capacity; Another reference number is that 200 circuit breaker has more weak electric current breaking capacity, but is equiped with the device that is used for increasing tolerance electric arc ability.These two circuit breakers are driven simultaneously, and perhaps circuit breaker 100 than circuit breaker 200 actions slightly a little later.
Circuit breaker 100 is existing types, for example can be the sort of circuit breaker of being narrated in the French patent application number 8900009 of application on January 2nd, 1989 with applicant's name.This air blowing type sulfur hexafluoride breaker only needs lower driving energy, has remarkable breaking capacity when current over-zero.As a kind of modification, also may use an automatic air circuit breaker or the circuit breaker that certain oil-filled volume is arranged.
Circuit breaker 200 has lower electric current breaking capacity, but it is equiped with the device that is used to increase arc voltage, and in the embodiment shown in fig. 3, the device that is used to increase arc voltage is to be made of the device that extends above-mentioned electric arc.
The circuit breaker of Fig. 3 comprises an insulation crust 1, the housing of making by airtight porcelain for example, and be full of gas sulphur hexafluoride (SF for example with good insulation performance 6), pressure is several crust.
In this enclosure interior a metallic cylinder 2 is arranged, define an arc blow-out volume V 1, and decide contact as nonvolatil.This cylinder is fixed on the metallic plate 3, and this plate seals an end of housing, and is connected to first current terminal 4.Cylinder 2 is being supported an arc blow-out nozzle 5 of being made by insulating material.
A metal tube 6 is installed in cylinder 2 inside, and itself has a piston 7 that slides within it, and this piston has a Metallic rod 8, and its end is made by a kind of alloy, can tolerate the effect of electric arc.This Metallic rod is used as arc contact.This piston is withstood by a spring 10, and this spring is pressed over again on the metallic plate 3.A litzendraht wire 9 couples together plate 3 and bar 8 on electric.
The mobile device that is connected to a driving mechanism (not shown) comprises that a nonvolatil moving contact 12 is used for matching with cylinder 2, and an arc contact that is made of bar 14, and its end 14A is made by the material that can tolerate arcing.
Contact 12 and 14 is connected to the second current terminal (not shown) on electric.
When this circuit breaker disconnected, permanent contact 2 separated with 12, so electric current is switched to arc contact 8 and 14.When these two contacts separate, between end 8A and 14A, just trigger out electric arc.This electric arc institute liberated heat draws temperature and raises, thereby has increased the pressure in the volume V 1.Piston 7 is postponed pressured this spring, has elongated electric arc thus, and the resistance that has so just increased it has also just increased arc voltage, and this makes electric current pass through null value.Circuit breaker 100 disconnects simultaneously with circuit breaker 200 or several milliseconds of disconnections in evening, thereby guarantees that electric current is disconnected.
The present invention mainly is applicable at the electrical network that adopts series capacitor equipment compensating reactive power energy and breaks electric current.

Claims (3)

1, be used to interdict the not breaker apparatus of natural zero-crossing electric current, the characteristics of this equipment are that it comprises two circuit breakers that are in series, and a circuit breaker (100) has good breaking capacity; A circuit breaker (200) has more weak breaking capacity, but is provided with the device that is used to elongate electric arc and increases arc voltage.
2, according to the equipment in the claim 1, its characteristics are that the circuit breaker with low breaking capacity comprises a seal casinghousing (1), is full of the gas with good insulation performance, for example sulphur hexafluoride (SF 6); First and second arc contacts (8,14); This second arc contact (14) is transportable by means of a driving mechanism; One second arc contact (14) passes arc blow-out nozzle (5) wherein in addition; And making this first arc contact (8) along the device (6,7) that moves with the second arc contact rightabout, this motion originates in the moment that this arc contact begins to separate.
3, according to the equipment in the claim 2, its characteristics are that above-mentioned motion upward obtains by above-mentioned first contact (8) being fixed to a piston (7), and piston (7) moves in a cylinder (6); Under the heat effect that electric arc produced, increased pressure appears in the blocking chamber that is arranged in arc blow-out nozzle (5) upstream end, and this piston is moved.
CN 92110512 1991-09-11 1992-09-11 A kind of equipment that is used for interrupting current without natural zero-crossing Pending CN1070512A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9111220A FR2681185B1 (en) 1991-09-11 1991-09-11 CURRENT DEVICE WITHOUT NATURAL PASSAGE BY ZERO OF THE CURRENT.
FR9111220 1991-09-11

Publications (1)

Publication Number Publication Date
CN1070512A true CN1070512A (en) 1993-03-31

Family

ID=9416847

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 92110512 Pending CN1070512A (en) 1991-09-11 1992-09-11 A kind of equipment that is used for interrupting current without natural zero-crossing

Country Status (6)

Country Link
EP (1) EP0532394A1 (en)
JP (1) JPH05205581A (en)
CN (1) CN1070512A (en)
BR (1) BR9203516A (en)
CA (1) CA2077928A1 (en)
FR (1) FR2681185B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100403471C (en) * 2004-07-16 2008-07-16 日本Ae帕瓦株式会社 High voltage large capcity breaker

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0950743A (en) * 1995-08-08 1997-02-18 Mitsubishi Electric Corp Dc circuit breaker

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE641604C (en) * 1934-03-22 1937-02-06 Frida Strauss Geb Ruppel Switching arrangement
DE689916C (en) * 1938-05-17 1940-04-09 Voigt & Haeffner Akt Ges High-performance liquid switch with two interruption points in series
CH297152A (en) * 1943-07-05 1954-03-15 Licentia Gmbh Compressed gas switch with several interruption points.
DE1465375A1 (en) * 1964-06-13 1969-01-16 Calor Emag Elek Zitaets Ag Voltage separation point
CH654950A5 (en) * 1980-07-18 1986-03-14 Bbc Brown Boveri & Cie HIGH VOLTAGE CIRCUIT BREAKERS.
JPS60167221A (en) * 1984-02-10 1985-08-30 株式会社日立製作所 Dc breaker
DE3611270C2 (en) * 1986-04-04 1995-08-17 Sachsenwerk Ag Electrical switching device for high switching voltages

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100403471C (en) * 2004-07-16 2008-07-16 日本Ae帕瓦株式会社 High voltage large capcity breaker

Also Published As

Publication number Publication date
FR2681185B1 (en) 1995-01-13
FR2681185A1 (en) 1993-03-12
CA2077928A1 (en) 1993-03-12
BR9203516A (en) 1993-04-13
EP0532394A1 (en) 1993-03-17
JPH05205581A (en) 1993-08-13

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