EP0604470B1 - Verfahren zur ermittlung mechanischer parameter eines elektrischen schaltgerätes - Google Patents

Verfahren zur ermittlung mechanischer parameter eines elektrischen schaltgerätes Download PDF

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Publication number
EP0604470B1
EP0604470B1 EP92918254A EP92918254A EP0604470B1 EP 0604470 B1 EP0604470 B1 EP 0604470B1 EP 92918254 A EP92918254 A EP 92918254A EP 92918254 A EP92918254 A EP 92918254A EP 0604470 B1 EP0604470 B1 EP 0604470B1
Authority
EP
European Patent Office
Prior art keywords
switching
time
speed
switching device
movement
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
EP92918254A
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German (de)
English (en)
French (fr)
Other versions
EP0604470A1 (de
Inventor
Bernd Besslein
Jürgen NÜTZEL
Werner Reinert
Peter Zinn
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
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Publication date
Application filed by Siemens AG, Siemens Corp filed Critical Siemens AG
Publication of EP0604470A1 publication Critical patent/EP0604470A1/de
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
    • H01H11/0062—Testing or measuring non-electrical properties of switches, e.g. contact velocity

Definitions

  • the invention relates to a method for determining mechanical parameters of an electrical switching device exposed to environmental influences, the at least one energy storage device for providing a switching movement for switching on, at least one switching chamber with switching contacts, a contact force spring to be tensioned by the energy storage device when switching on, and a drive device for transmitting a switching movement to the Switching chamber has.
  • the invention has for its object to design a method of the type mentioned in such a way that, based on a simple test to be carried out after the completion of a switching device, a statement can be made as to whether the switching device is suitable for a specific intended use.
  • a part of the drive device involved in the entire drive movement is provided with a measuring sensor for determining the Provide part speed; a selected environmental influence is impressed on the switching device with a certain intensity; the dependence of the speed of the part on time is determined; the measurement is repeated at different values of the intensity of the selected environmental influence.
  • the speed of the moving part of the drive device it is not necessary to determine the speed of the moving part of the drive device in a large number of times. Rather, it suffices to relate the speeds measured during a switching operation at at least two successive times during the movement of the part and to repeat this step for all measurements.
  • the speed of the part is determined at the point in time at which the switching contacts of the switching chamber touch and during the switching movement the speed of the part is determined at the point in time at which a latch securing the switch-on position takes effect. In this way, a statement is made as to whether sufficient residual energy is still available towards the end of the switching-on process in order to latch the drive device when the switching contacts of the switching device are properly closed.
  • switchgear from ongoing production can now be tested in such a way that the switchgear is subjected to a measurement at a normal value of the selected environmental influence and the determined values for obtaining the permissible range of use of the switchgear with reference values from measurements with variable values of selected environmental influence are compared.
  • Figure 1 shows schematically a vacuum circuit breaker as an example of switchgear to be examined.
  • FIG. 2 A block diagram is shown in FIG. 2 in order to obtain the procedure for obtaining measured values for the properties of switching devices.
  • FIG. 3 illustrates, likewise as a block diagram, the procedure for testing a switching device removed from ongoing production.
  • FIG. 4 shows the dependence of the energy of the drive device of a switching device as a function of a certain influence of the environment as a diagram.
  • Figure 5 is also a diagram showing the angle of rotation of a control shaft as a function of time.
  • FIG. 1 a vacuum circuit breaker is shown as an example of a type of switchgear to be examined, as is used in the voltage range from approximately 6 to 36 kV and for rated breaking currents up to approximately 50,000 A.
  • the main components of such a circuit breaker are shown in FIG. 1, a vacuum interrupter 1 with a fixed connecting pin 2, a movable connecting pin 3 and connecting bars 4 connected to connecting pins 2 and 3, and a drive device designated as a whole by 5.
  • the drive device 5 contains a closing spring 6 and a switch shaft 7, which absorbs the energy of the closing spring 6 and forwards it to one or more vacuum interrupters 1. Shown in FIG. 1 is the open position of the circuit breaker, in which the switch shaft 7 is blocked by a closing pawl 10.
  • Arrows E1, E2, E3 and En indicate any influences in the environment in FIG. 1 which act on the circuit breaker and can influence its mode of operation. Such influences can lead to a situation in the Figure 1 indicated, interacting with the switch shaft 7 opening pawl 11 can not be effective, so that the switch-on position of the circuit breaker is not fully reached.
  • the circuit breaker according to FIG. 1 is provided with a measuring device 14 which allows the speed of the switch shaft 7 to be recorded.
  • the measuring device 14 can comprise an inductive displacement sensor, as is customary in experimental fields of electrical engineering.
  • FIG. 2 illustrates that a number of circuit breakers with the symbols S1, S2, S3, S4 and Sn are available.
  • the identification Sn indicates that the number of circuit breakers to be examined may be arbitrary, but not too small to obtain sufficiently reliable results. This number of circuit breakers is exposed to environmental influences, each of which is activated to different degrees. In FIG. 2 it is assumed that a certain environmental influence E1, which can be, for example, the air pressure or the temperature, is brought into effect in different intensities I1, I2, I3, I4 and In, with the identification In it is indicated that the overall possible spectrum of intensities is provided with a desired or required fineness.
  • E1 which can be, for example, the air pressure or the temperature
  • FIG. 3 shows a circuit breaker Sp corresponding to FIG. 1 with a measuring device 14 which is set up specifically for detecting the rotational speed of the switch shaft 7 at a time t1 and at a further time t2.
  • the time t1 corresponds to the moment of contact of the switching contacts of the vacuum interrupter 1 in the course of the switching-on process and the time t2 corresponds to the engagement of the opening pawl 11.
  • FIG. 3 shows that the power switch Sp is operationally reliable up to the intensity I4 of the environmental influence E1.
  • FIG. 4 illustrates the energy balance of a circuit breaker of the type considered above as a function of the temperature as an example of one of the environmental influences that occur.
  • the switching energy is plotted against the temperature, specifically in such a way that low temperatures are labeled "- -” and higher temperatures are labeled "+ +". "-", "0" and "+” are intermediate values.
  • a straight line is drawn in the upper part of the diagram as a boundary line for the available energy supply.
  • the minimum required switching energy is also shown as a straight line in the lower part of the diagram.
  • the dependence of the internal friction of the circuit breaker under consideration on the temperature is illustrated by a curve falling from left to right.
  • An arrow labeled PR between the curve and a reference straight line parallel to the temperature axis illustrates the residual energy in the drive of the circuit breaker, which varies depending on the temperature.
  • the limit for the area of application of the circuit breaker is obviously reached at the point where the residual energy takes the value "0".
  • FIG. 5 shows the angle of rotation of the switch shaft 7 of a circuit breaker according to FIG. 1 as a function of time.
  • the curve shown in FIG. 5 crosses a reference line parallel to the time axis and approaches this reference line after one or more overshoots.
  • Exceeding the reference line in this case marks the point in time at which the opening pawl 11 engages in FIG. 1. If there were insufficient residual energy at this point in time, the latching would not be effective and the circuit breaker would not reach its closed position safely.
  • the point in time t1 is entered in FIG. 5, which marks the point in time at which the switching contacts of the vacuum interrupter 1 touch when switching on.
  • friction coefficients that are valid for a specific type of circuit breaker can be obtained according to the method according to FIG. 2 and are available for comparison when testing a circuit breaker taken from production according to FIG. 3.
  • the permissible area of application of a circuit breaker can thus be determined in an easily feasible manner.
  • the application of the invention is not to vacuum circuit breakers limited, but is also possible without any fundamental change in switchgear with switchgear chambers of another type, for example with sulfur hexafluoride or another extinguishing gas.
  • the method described is suitable for examining circuit breakers with drive devices which contain other energy stores instead of springs, e.g. B. Hydraulic or pneumatic based storage.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Testing Electric Properties And Detecting Electric Faults (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Control Of Electric Motors In General (AREA)
  • Gas-Insulated Switchgears (AREA)
  • Testing Or Calibration Of Command Recording Devices (AREA)
EP92918254A 1991-09-20 1992-08-26 Verfahren zur ermittlung mechanischer parameter eines elektrischen schaltgerätes Expired - Lifetime EP0604470B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4131828A DE4131828C1 (enrdf_load_stackoverflow) 1991-09-20 1991-09-20
DE4131828 1991-09-20
PCT/DE1992/000687 WO1993006612A1 (de) 1991-09-20 1992-08-26 Verfahren zur ermittlung mechanischer parameter eines elektrischen schaltgerätes

Publications (2)

Publication Number Publication Date
EP0604470A1 EP0604470A1 (de) 1994-07-06
EP0604470B1 true EP0604470B1 (de) 1995-06-28

Family

ID=6441407

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92918254A Expired - Lifetime EP0604470B1 (de) 1991-09-20 1992-08-26 Verfahren zur ermittlung mechanischer parameter eines elektrischen schaltgerätes

Country Status (7)

Country Link
US (1) US5530299A (enrdf_load_stackoverflow)
EP (1) EP0604470B1 (enrdf_load_stackoverflow)
JP (1) JPH06510853A (enrdf_load_stackoverflow)
AT (1) ATE124566T1 (enrdf_load_stackoverflow)
DE (2) DE4131828C1 (enrdf_load_stackoverflow)
DK (1) DK0604470T3 (enrdf_load_stackoverflow)
WO (1) WO1993006612A1 (enrdf_load_stackoverflow)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4408631C2 (de) * 1994-03-09 1996-11-14 Siemens Ag Einrichtung zur Funktionssicherheitsüberwachung von Leistungsschalteinrichtungen (Diagnosegerät)
ATE358325T1 (de) * 1999-07-14 2007-04-15 Abb Research Ltd Betätigung und steuervorrichtung für elektrische schaltanlage
DE10104392C2 (de) * 2001-01-19 2003-07-03 Siemens Ag Vakuumschalter sowie System und Verfahren zu seiner Steuerung
WO2009046746A1 (de) * 2007-10-08 2009-04-16 Siemens Aktiengesellschaft Verfahren zur prüfung des freiauslöseverhaltens eines mechanisch betätigbaren leistungsschalters und vorrichtung zur durchführung des verfahrens
WO2009046747A1 (de) * 2007-10-08 2009-04-16 Siemens Aktiengesellschaft Verfahren zur prüfung des freiauslöseverhaltens eines elektromechanisch betätigbaren, leistungsschalters und vorrichtung zur durchführung des verfahrens
US8552728B2 (en) * 2009-11-30 2013-10-08 Utility Relay Co., Ltd. Sluggish circuit breaker detection system and method
CN106569127A (zh) * 2016-11-02 2017-04-19 中国电力科学研究院 一种电能表负荷开关的可靠性评价方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56138835A (en) * 1980-03-31 1981-10-29 Tokyo Shibaura Electric Co Method of externally diagnosing malfunction of switch
JPS5776436A (en) * 1980-10-31 1982-05-13 Toshiba Corp External diagnosis for trouble of switching apparatus
JPH073465B2 (ja) * 1986-09-12 1995-01-18 オムロン株式会社 スイツチ機構
JPH0721981B2 (ja) * 1987-04-13 1995-03-08 株式会社日立製作所 開閉器の動作監視装置
DE3942836A1 (de) * 1989-12-23 1991-06-27 Daimler Benz Ag Verfahren zur bewegungs- und lagezustandserkennung eines durch magnetische wechselwirkung zwischen zwei endpositionen beweglichen bauteiles eines induktiven elektrischen verbrauchers
US5117189A (en) * 1990-02-21 1992-05-26 Eaton Corporation Automatic testing apparatus for electrical switches

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
CIGRE, 1988 Session, 28.08.-3.09. 13-11 'Electronic system for controlling and monitoring the mechanical and electrical integrity of HV circuit-breakers' by R. Jeanjean, M. Landry, A. Chenier and D. Demissy *

Also Published As

Publication number Publication date
DE59202756D1 (de) 1995-08-03
DE4131828C1 (enrdf_load_stackoverflow) 1993-04-08
WO1993006612A1 (de) 1993-04-01
JPH06510853A (ja) 1994-12-01
DK0604470T3 (da) 1995-11-13
ATE124566T1 (de) 1995-07-15
EP0604470A1 (de) 1994-07-06
US5530299A (en) 1996-06-25

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