EP0470678A1 - Disjoncteur haute tension SF6 - Google Patents

Disjoncteur haute tension SF6 Download PDF

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Publication number
EP0470678A1
EP0470678A1 EP91250211A EP91250211A EP0470678A1 EP 0470678 A1 EP0470678 A1 EP 0470678A1 EP 91250211 A EP91250211 A EP 91250211A EP 91250211 A EP91250211 A EP 91250211A EP 0470678 A1 EP0470678 A1 EP 0470678A1
Authority
EP
European Patent Office
Prior art keywords
current
circuit breaker
time
circuit
voltage
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.)
Withdrawn
Application number
EP91250211A
Other languages
German (de)
English (en)
Inventor
Wolfgang Stephan
Norbert Dr. Trapp
Friedrich-Wilhelm Veuhoff
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 AG
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
Application filed by Siemens AG, Siemens Corp filed Critical Siemens AG
Publication of EP0470678A1 publication Critical patent/EP0470678A1/fr
Withdrawn legal-status Critical Current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
    • H01H33/59—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
    • H01H33/593—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 for ensuring operation of the switch at a predetermined point of 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
    • H01H33/006—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means adapted for interrupting fault currents with delayed zero crossings

Definitions

  • the invention relates to a high-voltage SF 6 pressure gas circuit breaker, in which the triggering of the switching-off movement of the switching elements of the interrupter unit designed for a specific short-circuit breaking capacity in 50 Hz operation is caused by a triggering control device which, regardless of the time of a command to switch off, the switching-off movement triggers the switching elements at a time which is in a fixed relationship to the zero crossing of the current to be interrupted, which ensures a zero crossing in the quenching area of the interrupter unit.
  • Such a high-voltage blower piston circuit breaker with synchronous control of the switch-off time is known from DD-A1 248 903.
  • the tripping control unit controls the switch-off movement by means of a delay generated by the zero crossing of the current to be interrupted, depending on the intrinsic switch time and the amount of the current Impulse so that a current zero crossing of the same polarity lies in the optimal quenching range of the switch and then interrupts the current with a minimum arc time when there is a switch-off command, such as manual switch-off or switch-off by mains protection.
  • a switch-off command such as manual switch-off or switch-off by mains protection.
  • the interrupter unit of the known switch with an enlarged arcing chamber and the installation of a burn-resistant insert in the nozzle is modified compared to a high-voltage circuit breaker corresponding to operation at 50 Hz, because it is known that the switching work at 163 Hz (as an integral over the arc time from the product of short-circuit current and arc voltage) per current half-wave or the amount of heat of the switching arc is three times greater than at the same current strengths at 50 Hz (see magazine "E and M", 1987, pages 261, 262).
  • Such an adaptation of the quenching chamber in the interrupter unit requires a high development effort for a relatively low requirement.
  • the invention has for its object to provide in a different, simple manner a high-voltage SF 6 pressure gas circuit breaker suitable for 16 Hz, in particular with a blowing piston.
  • a high-voltage SF 6 pressure gas circuit breaker of the type described at the outset ie a high voltage SF 6 pressure gas circuit breaker provided with a breaker unit designed for 50 Hz and with a trip control device intended for synchronous switching, according to the invention in operated a 16 Hz network and the trigger control unit is set so that a current zero crossing of the 16 Hz current is always in the extinguishing range of the 50 Hz interrupter unit.
  • a normal single-pole 50 Hz high-voltage SF 6 compressed gas circuit breaker be it an outdoor switch or a circuit breaker located in a compressed gas-insulated, high-voltage switchgear, can also switch off the short-circuit currents in a 16 Hz network, for which the breaker unit is designed to interrupt at 50 Hz is.
  • the trip control unit can be activated by the shutdown command. Only when there is a switch-off command, be it a manual switch-off command or a command given by a mains protection device, does the tripping control device record the measured data of the current to be switched off and, with the constant delay time set, triggers the switching-off movement of the switching elements in such a way that the zero current passage into the extinguishing area the breaker unit falls.
  • FIG. 1 shows a short-circuit current i plotted over time t in a 16 Hz network.
  • This short-circuit current i has a pure sine shape with a half cycle of 30 ms. If the high-voltage SF 6 blown-circuit breaker installed in this 16 network has received a shutdown command as a result of the occurrence of the short-circuit current i, a triggering control unit connected to the drive of the switch is activated, which detects the current zero crossings of the short-circuit current i.
  • This tripping control unit responds at the first current zero crossing 1 after the positive half-wave of the short-circuit current i, with which a certain time delay 2, which was previously set depending on the proper times of the measuring devices of the tripping control unit and the circuit breaker and the size of the quenching area of the interrupter unit, first becomes effective , which is indicated by arrows and is approximately 44 ms in the exemplary embodiment. After this time delay 2 has elapsed, the opening movement of the switching elements of the circuit breaker is triggered at time 3 of the contact separation.
  • the circuit breakers of the circuit breaker thus open and, after a certain lead time 4, represented by arrows 4, of approximately 9 ms at time 5, reach a position which corresponds to the minimum arcing time of the interrupter unit. This means that the extinguishing area 6 (also represented by arrows) begins at time 5, since the interrupter unit would then already have been able to prevent an arc from reigniting.
  • the extinguishing area 6 of the interrupter unit is approximately 15 ms in accordance with the usual conditions for 50 Hz high-voltage SFs compressed gas circuit breakers.
  • Figure 2 shows the current profile of such asymmetrical short-circuit currents i x and iy (shown in dashed lines), in which the DC element at the time of triggering the short-circuit current is approximately as large as its peak value.
  • the same reference numerals have been retained for the same time ranges, but are supplemented with x or y to clarify the assignment.
  • the short-circuit current i x which contains a positive direct current element, has the first two zero current crossings 8 a short time after the short circuit has occurred, so that it is assumed that at this point in time the zero-current crossings 8 has not yet sent the circuit breaker to the circuit breaker. Accordingly, the trigger control unit is only activated at the subsequent zero current crossing 9, so that the constant time delay now begins twice. This means that the tripping control unit triggers the opening movement of the circuit breakers of the circuit breaker at time 10, at which the contacts of the circuit breakers separate and thus the lead time 4x begins. According to the extinguishing area 6x the interrupter unit at the time begins 11. The next zero crossing 12 of the short-circuit current i x is now clearly within this flooding zone 6x, so that the short circuit current i x interrupted with certainty.
  • the short-circuit current iy with the negative DC link.
  • the first current zero crossing 13 occurs too early for the activation of the triggering device by the switch-off command. This is only activated at the next current zero crossing 14.
  • the time delay 2y therefore begins in this current zero crossing 14 and the command to trigger the switching-off movement of the switching elements is issued at the triggering time 15.
  • the deletion area 6y of the interrupter unit therefore begins at time 16.
  • the zero current crossing 17 after the time delay 2y has elapsed clearly falls within the extinguishing range 6y of the interrupter unit.
  • the short-circuit current iy is therefore also switched off by the 50 Hz interrupter unit of the circuit breaker without difficulty.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Keying Circuit Devices (AREA)
EP91250211A 1990-08-09 1991-07-30 Disjoncteur haute tension SF6 Withdrawn EP0470678A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP90250204A EP0470302A1 (fr) 1990-08-09 1990-08-09 Disjoncteur haute tension à SF6 sous pression
EP90250204 1990-08-09

Publications (1)

Publication Number Publication Date
EP0470678A1 true EP0470678A1 (fr) 1992-02-12

Family

ID=8205234

Family Applications (2)

Application Number Title Priority Date Filing Date
EP90250204A Withdrawn EP0470302A1 (fr) 1990-08-09 1990-08-09 Disjoncteur haute tension à SF6 sous pression
EP91250211A Withdrawn EP0470678A1 (fr) 1990-08-09 1991-07-30 Disjoncteur haute tension SF6

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP90250204A Withdrawn EP0470302A1 (fr) 1990-08-09 1990-08-09 Disjoncteur haute tension à SF6 sous pression

Country Status (2)

Country Link
EP (2) EP0470302A1 (fr)
DE (1) DE9116231U1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7698967B2 (en) 2004-10-29 2010-04-20 Compositech, Inc. Bicycle handlebar with removable and adjustable aerobar

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB718985A (en) * 1952-03-13 1954-11-24 Reyrolle A & Co Ltd Improvements relating to gas blast circuit breakers
DE2502810B1 (de) * 1969-11-08 1976-02-05 Reinhausen Maschf Scheubeck Kraftspeicher für Lastumschalter von Stufenschaltern für Regeltransformatoren
EP0338374A2 (fr) * 1988-04-16 1989-10-25 Asea Brown Boveri Aktiengesellschaft Procédé et dispositif de commande d'une installation d'actionnement d'un disjoncteur de moyenne ou haute tension

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB718985A (en) * 1952-03-13 1954-11-24 Reyrolle A & Co Ltd Improvements relating to gas blast circuit breakers
DE2502810B1 (de) * 1969-11-08 1976-02-05 Reinhausen Maschf Scheubeck Kraftspeicher für Lastumschalter von Stufenschaltern für Regeltransformatoren
EP0338374A2 (fr) * 1988-04-16 1989-10-25 Asea Brown Boveri Aktiengesellschaft Procédé et dispositif de commande d'une installation d'actionnement d'un disjoncteur de moyenne ou haute tension

Also Published As

Publication number Publication date
DE9116231U1 (de) 1992-06-11
EP0470302A1 (fr) 1992-02-12

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