WO1979001033A1 - Disposition pour la protection contre une sollicitation par suppression de l'encapsulage lors de decharge a arc accidentelle dans des dispositifs de commutation encapsules et isoles par gaz sous pression - Google Patents

Disposition pour la protection contre une sollicitation par suppression de l'encapsulage lors de decharge a arc accidentelle dans des dispositifs de commutation encapsules et isoles par gaz sous pression Download PDF

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Publication number
WO1979001033A1
WO1979001033A1 PCT/CH1979/000062 CH7900062W WO7901033A1 WO 1979001033 A1 WO1979001033 A1 WO 1979001033A1 CH 7900062 W CH7900062 W CH 7900062W WO 7901033 A1 WO7901033 A1 WO 7901033A1
Authority
WO
WIPO (PCT)
Prior art keywords
encapsulation
capsule
insulated
strain
strain gauges
Prior art date
Application number
PCT/CH1979/000062
Other languages
German (de)
English (en)
Inventor
G Kloetzner
Original Assignee
Bbc Brown Boveri & Cie
G Kloetzner
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 Bbc Brown Boveri & Cie, G Kloetzner filed Critical Bbc Brown Boveri & Cie
Publication of WO1979001033A1 publication Critical patent/WO1979001033A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H1/00—Details of emergency protective circuit arrangements
    • H02H1/0007—Details of emergency protective circuit arrangements concerning the detecting means
    • H02H1/0015—Using arc detectors
    • H02H1/0023—Using arc detectors sensing non electrical parameters, e.g. by optical, pneumatic, thermal or sonic sensors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
    • H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
    • H02B13/035—Gas-insulated switchgear
    • H02B13/065—Means for detecting or reacting to mechanical or electrical defects
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
    • H02H5/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal fluid pressure, liquid level or liquid displacement, e.g. Buchholz relays
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
    • H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
    • H02B13/035—Gas-insulated switchgear
    • H02B13/065—Means for detecting or reacting to mechanical or electrical defects
    • H02B13/0655—Means for detecting or reacting to mechanical or electrical defects through monitoring changes of gas properties

Definitions

  • the invention relates to a device for protection against overpressure of the encapsulation in the event of arcing faults in encapsulated, pressurized gas-insulated and divided into individual compartments, with an encoder, the signal of which is fed via an amplifier to a tripping device which switches off the short-circuit current so that the arc is extinguished .
  • a protective device with light-sensitive sensors for detecting the arc has become known.
  • the encoders are arranged inside the encapsulation.
  • the encapsulation has to be opened for this purpose in the event of revision work or work that has to be carried out on the protective device to eliminate faults. This is particularly cumbersome in the case of encapsulated, SE 6 -insulated switchgear, since the SF 6 gas must be removed from the corresponding compartment before the encapsulation is opened.
  • the bulkhead must be evacuated and refilled with Sf 6 gas.
  • the invention has for its object to arrange a sensor for detecting the pressure pulse in the event of arcing faults in encapsulated switchgear so that it is easily accessible at all times.
  • At least one strain sensor is arranged on the outer wall of the capsule for each bulkhead in order to detect a capsule stretch due to a pressure pulse.
  • the strain sensor consists of a strain gauge and that several strain gauges over the circumference of the encapsulation is distributed and in that the strain gauges are arranged on a form-fitting and force-fitting tensioning band which is stretched over a tensioning device to check the function of the strain gauges.
  • strain transducers can be attached to the outside of the switchgear in a simple manner. An intervention in the capsule interior is therefore not necessary. Furthermore, the change in resistance in strain gauges occurs practically without delay due to the change in strain, so that strain gauges are very suitable for dynamic measurements.
  • strain gauges that work on the basis of an induction or capacitance change.
  • 1 is a diagram of a measuring chain for measurement with a strain gauge
  • Fig. 3 shows an arrangement of strain gauges on a Tension band that is placed around the encapsulation.
  • the strain gauge 1 forms a branch of the Wheatstone 'see bridge circuit 2, which is detuned by the change in resistance of the strain gauge due to its mechanical expansion.
  • a voltage U. arises which, with the supply voltage U E , forms the relative value U A / U E from the energy source 3, which is proportional to the relative change in resistance of the strain gauge.
  • the relative output voltage of the bridge circuit is amplified in the downstream amplifier 4, which is likewise supplied from the energy source 3.
  • the output signal of the amplifier acts on a fast grounding device 5, the grounding contact of which provides a conductive connection between grounded encapsulation and a live part of the switchgear, so that the arc is short-circuited and extinguished, as a result of which no further pressure build-up takes place inside the encapsulation.
  • the short-circuit current is switched off via a protective device, for example busbar protection.
  • the fast grounding device can be constructed in such a way that the grounding contact, which is designed as a grounding bolt, is actuated by a propellant charge and quickly establishes the system (2 to 3 ms).
  • FIGS. 2 and 3 show an encapsulation 6 shown in detail with a phase conductor 7 coaxially guided therein.
  • several strain gauges 8 are arranged in a schematic representation distributed over the circumference of the encapsulation.
  • FIG. 3 shows strain gauges 8 arranged on a tensioning band 9 which is positively and non-positively placed around the encapsulation and which is stretched for a functional test of the strain gauges via a tensioning device, which in the simplest case consists of a screw connection 10.

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Measuring Fluid Pressure (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)

Abstract

Une disposition pour la protection contre une sollicitation par suppression de l'encapsulage (6), dans des dispositifs de commutation encapsules et isoles par gaz sous pression, repartis dans des compartiments etanches individuels. L'arc est court-circuite pour etre eteint a l'aide d'un emetteur dont le signal est transmis au moyen d'un amplificateur (4) a un dispositif d'extinction. Pour detecter la dilatation d'une capsule resultant d'une impulsion de pression on dispose sur la paroi exterieure de la capsule et pour chaque compartiment etanche au moins un detecteur de dilatation.
PCT/CH1979/000062 1978-05-05 1979-04-30 Disposition pour la protection contre une sollicitation par suppression de l'encapsulage lors de decharge a arc accidentelle dans des dispositifs de commutation encapsules et isoles par gaz sous pression WO1979001033A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2819721 1978-05-05
DE19782819721 DE2819721A1 (de) 1978-05-05 1978-05-05 Einrichtung zum schutz gegen ueberdruckbeanspruchung der kapselung bei stoerlichtboegen in gekapselten, druckgasisolierten schaltanlagen

Publications (1)

Publication Number Publication Date
WO1979001033A1 true WO1979001033A1 (fr) 1979-11-29

Family

ID=6038736

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CH1979/000062 WO1979001033A1 (fr) 1978-05-05 1979-04-30 Disposition pour la protection contre une sollicitation par suppression de l'encapsulage lors de decharge a arc accidentelle dans des dispositifs de commutation encapsules et isoles par gaz sous pression

Country Status (3)

Country Link
EP (1) EP0015959A1 (fr)
DE (1) DE2819721A1 (fr)
WO (1) WO1979001033A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR826225A (fr) * 1936-09-05 1938-03-25 Siemens Ag Dispositif de protection pour appareils électriques isolés par du liquide
FR2215615A1 (fr) * 1973-10-24 1974-08-23 Poclain Sa
DE2447240A1 (de) * 1974-09-11 1976-03-25 Bbc Brown Boveri & Cie Einrichtung zur erfassung und signalisierung von in einem geschlossenen behaelter auftretendem licht

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR826225A (fr) * 1936-09-05 1938-03-25 Siemens Ag Dispositif de protection pour appareils électriques isolés par du liquide
FR2215615A1 (fr) * 1973-10-24 1974-08-23 Poclain Sa
DE2447240A1 (de) * 1974-09-11 1976-03-25 Bbc Brown Boveri & Cie Einrichtung zur erfassung und signalisierung von in einem geschlossenen behaelter auftretendem licht

Also Published As

Publication number Publication date
EP0015959A1 (fr) 1980-10-01
DE2819721A1 (de) 1979-11-15

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