EP1334500B1 - Schaltvorrichtung - Google Patents

Schaltvorrichtung Download PDF

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Publication number
EP1334500B1
EP1334500B1 EP01965815A EP01965815A EP1334500B1 EP 1334500 B1 EP1334500 B1 EP 1334500B1 EP 01965815 A EP01965815 A EP 01965815A EP 01965815 A EP01965815 A EP 01965815A EP 1334500 B1 EP1334500 B1 EP 1334500B1
Authority
EP
European Patent Office
Prior art keywords
switching device
electric motor
test
contact part
contact parts
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
EP01965815A
Other languages
English (en)
French (fr)
Other versions
EP1334500A1 (de
Inventor
Sjoerd Bosga
Philip Kjaer
Magnus Backman
Mats Svensson
Per-Olof Thureson
Lars Jonsson
Freddy Magnussen
Per Larsson
Stefan Valdemarsson
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 AB
Original Assignee
ABB AB
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 AB filed Critical ABB AB
Publication of EP1334500A1 publication Critical patent/EP1334500A1/de
Application granted granted Critical
Publication of EP1334500B1 publication Critical patent/EP1334500B1/de
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
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
    • H01H3/26—Power arrangements internal to the switch for operating the driving mechanism using dynamo-electric motor
    • H01H3/264—Power arrangements internal to the switch for operating the driving mechanism using dynamo-electric motor using a travelling nut mechanism
    • 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
    • H01H33/28—Power arrangements internal to the switch for operating the driving mechanism
    • H01H33/36—Power arrangements internal to the switch for operating the driving mechanism using dynamo-electric motor
    • 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

Definitions

  • the present invention relates to a method for testing, controlling and regulating a switching device with contact parts, and to a switching device therefore.
  • the switching device comprises an electric motor and a mechanical coupling device for transforming motion from the electric motor to at least one of the contact parts.
  • the switching device may comprise one or more electric motors and one or more mechanical coupling devices for transforming motion from each electric motor to at least one of the contact parts. Position, speed and/or acceleration of the at least one contact part are obtained, and position, speed and/or acceleration of the at least one contact part during operation are controlled during operation.
  • the method and the switching device are particularly intended for application in medium and high voltage networks.
  • the spring In a switching device using a spring mechanism, the spring will apply the same force on the contact part at every operation, so it has to be designed to operate as if a worse case current were to be interrupted at every operation. In a spring mechanism, the time delay is not constant. Spring mechanisms provide only position information with a very limited resolution. In a spring mechanism system external measurement equipment must be connected to collect information regarding the operation of spring mechanism, and must remain connected during all switching device operation s from which one wants to obtain information. In practice this means that to test a switching device, it must be taken out of service, measuring equipment must be connected and some operations must be performed.
  • a control unit receives input information, which information includes information about the network condition, the movement of the mobile contact part, the movement of the rotor of the electric motor and/or instructions for an operator. Based on this information the control unit controls the motor movement by controlling the current supplied thereto. The movement follows a motion profile stored in the control unit and the movement is adapted to the feedback information from the input.
  • a method specified in the preamble of claim 1 includes the steps specified in the characterising portion of that claim.
  • the use of an electric motor for operating the mobile contact part makes such tests very easy and reliable to perform.
  • the tests contribute to attain an accurate control since it can be based on information from the tests.
  • the object of the present invention in a third aspect is to improve a switching device of the known kind of as described above so as to achieve a switching device in which the motion of the mobile contact part is optimised, with respect to timing and motion profile.
  • self-diagnostic test is performed on the switching device by making small motor movements.
  • the method offers the possibility to supervise the function of the switching device. Since a switching device normally is inactive during its lifetime and operates only during a few short moments there is always a degree of uncertainty whether the switching device is properly ready for operation. By initiating a short motor movement sufficient data for evaluating the condition of the switching device is obtained when controlled according to the present invention. By such a test, information is obtained about the function of the rotor positioning system, the function of a converter when such is present, the function of the motor, the function of the contact parts, the capacity of the electrical storage means, etc.
  • the small movement is only a fraction of a full breaking movement, which means less than a 10 th thereof or even less than a 20 th thereof and typically in the range of a few millimetres for a switching device operating on a medium or a high voltage system.
  • the contact parts thus are never separated during these tests.
  • self-diagnostic test is performed on storage means for storage of electrical energy for the breaking operation by slightly charging or discharging said storage means.
  • Advantage is taken of the possibility offered by the invented method to also check the condition of the electric storage means. Data obtained by this slight charging or discharging informs whether the storage means is ready for operation.
  • Self-diagnostic test may be performed either as a result of an external order or as a result of triggering by an internal condition.
  • the tests according to the embodiments described closest above and other similar tests, which the present invention makes possible, are advantageously initiated by external order. Such orders are given when it is considered relevant to check the status or are given at regular intervals. In the latter case ordering is performed automatically.
  • Another advantageous alternative is to initiate such tests in response to internal conditions of the switching device. In such a case the tests are automatically performed when internal conditions indicate that there might be risk for defective performance.
  • a processor is used for processing obtained information and/or providing relevant instructions.
  • the processor operates according to a computer program. Thereby control and regulation is performed with optimised efficiency.
  • the switching device is small in size and cheap to manufacture.
  • the embodiment also makes it easy to amend the way in which control is performed in response to obtained information.
  • a switching device of the kind specified in the preamble of claim 4 includes the specific features specified in the characterising portion of the claim.
  • Preferred embodiments of a switching device according to the fourth aspect of the invention are specified in the claims depending from claim 4. These embodiments offer advantages of similar kinds as those of the preferred embodiments of the corresponding invented method.
  • Fig. 1 schematically illustrates the principle of an electric switching device. It consists of a breaking chamber 1, actuating means 2 and an actuating rod 3.
  • a breaking chamber In the breaking chamber there is provided a stationary contact part 4 and a mobile contact part 5.
  • Each contact part is connected to a conduct respectively.
  • the two contact parts 4, 5 are in contact with each other and current flows from the one contact part to the other through the switching device.
  • the mobile contact part 5 moves away from the stationary contact part at high speed. Thereby initially an electric arc develops between the contact parts, which arc is extinguished shortly after contact part separation by means of an insulation gas.
  • Fig. 2 illustrates a first embodiment of the actuating means 2 of a switching device of a kind similar to that described in connection with fig. 1 .
  • the actuating means includes an electric motor 6 comprising a stator 12 and a rotor 13 enclosed by a hood 7.
  • One end of the hood 7 is attached to a mounting plate 8, which is carried by a support, e.g. by means of bolts through borings 9 in the plate 8.
  • a post 9 of Insulating material e.g. porcelain extends upwards in the figure.
  • the insulation post 9 is provided with flanges 10 on its exterior to attain an increased creep distance.
  • Inside the insulation post the actuating rod is arranged.
  • the breaking chamber is housed and its mobile contact part is rigidly connected to the actuating rod 3.
  • the actuating rod 3, the insulation rod and the motor 6 are all coaxial.
  • a motion transforming mechanism is provided for transforming the rotary motion of motor rotor 13 to translatory motions of the actuating the rod 3 in order to open or close the switching device in accordance with what has been described in connection to fig. 1 .
  • the motion transforming mechanism will be described more in detail in the following.
  • the rotor 13 of the motor is journalled by a bearing 14,15 at each end of the rotor.
  • the stator 12 of the motor is attached to the motor casing 1 and the motor housing in attached to the mounting plate 8.
  • the rotor 13 has a central axial boring 30 extending along the major part of the rotor length.
  • the mounting plate 8 has an opening coaxial with the motor shaft in which opening a nut 16 is journalled for rotation in a double acting angular contact ball bearing 18.
  • the outer ring 19 of the bearing 18 is attached to the mounting plate 8 by bolds, not shown, in borings 20 extending through a flange on the outer ring.
  • An inner ring 21 of the bearing is rigidly connected to a nut 16.
  • the inner ring 21 is also rigidly connected to the rotor 13.
  • a screw 17 extends through the nut, i.e. a rod having threads.
  • the threads of the nut 16 and the screw 17 co-operate in engagement with each other. Relative rotation between them thus results in that the screw is axially displaced in relation to the nut.
  • the end of the screw 17 that is remote from the motor, i.e. the upper end in the figure is connected to the actuating rod 3 of the switching device. This is accomplished in that the upper end of the screw extends into a boring 23 in the lower end 24 of the actuating rod.
  • the connection is received by diametrically arranged pin 25 extending through the ends of the screw and the actuating rod.
  • a guiding sleeve 26 extends enclosing the screw 17.
  • the guiding sleeve has diametrically located axially extending guide tracks 27.
  • the pin 25 extends out through each guide track 27 and is provided with a locking washer 28 at each end.
  • the guiding track 27 has a width corresponding to the diameter of the pin 25.
  • the screw 17 is secured against rotation in relation to the guiding sleeve 26.
  • the guiding sleeve 26 also is secured against rotation in that it is attached to the mounting plate 8 by means of not shown bolts through the borings 29.
  • the guiding sleeve 26 has an inner diameter such that the actuating rod 3 with small clearance is inserted therein.
  • Fig. 2 shows the switching device in its normal position when it is in closing position.
  • the motor is started so that its rotor 13 starts to rotate clockwise as seen from above in the figure. This forces the screw to move clockwise where through the mobile contact part 5 (see fig. 1 ) is withdrawn from contact with the stationary contact part.
  • the central boring 30 has a length giving space enough for the screw to be displaced a sufficient distance for completing breaking. During the breaking operation the lower part of the actuating rod will slide downwards in the guiding sleeve 26.
  • the screw thus relates together with the rotor and the nut is forced to translatory motion by its mesh with the screw.
  • Such an embodiment offers the advantage that the mass that is to be accelerated to a translatory motion becomes much smaller than In the embodiment according to fig. 2 .
  • Fig. 3 is a block diagram showing an example of a switching device according to the present invention. It comprises a breaking chamber 1 with contact parts 4, 5.
  • the switching device operates on a line 51 of an electric network, and each contact part 4, 5 is connected to a respective part of the line 51.
  • One of the contact parts is mobile and is mechanically connected to an electric motor 6 through a mechanical coupling device 41 for transforming rotary motion of the electric motor to translatory motion of the mobile contact part 5.
  • the arrangement of the breaking chamber, the mechanical coupling device and the electric motor can be as illustrated in figures 1 and 2 , but other arrangements can be used of course.
  • the electric motor 6 is connected by an electric coupling 52 to a converter 47.
  • the converter 47 is connected by an electric coupling 53 to a capacitor bank 44. Electric energy for operating the switching device is supplied from the capacitor bank 44 to the converter 47.
  • the converter converts the electricity and supplies it to the electric motor 6.
  • the capacitor bank is charged by a charger 48 connected to a network supply 49 or a battery supply 50.
  • a control unit 43 controls the operation of the switching device.
  • the control unit is arranged to obtain information related to the switching device and to provide control signals for its operation.
  • a plurality of signal lines thus connects the control unit 43 with other parts of the switching device.
  • a first signal line connects the control unit with a record means 42 in the electric motor 6.
  • the record means 42 is connected to the rotor of the electric motor to obtain data about its motion. These data can be position, speed or acceleration or a combination thereof. Since the movement of the rotor is transferred to the mobile contact part 5, the data of the rotor motion are indicative of the corresponding data of the mobile contact part 5.
  • the control unit 55 sends control signals to the converter 47, for controlling the operation of the electric motor 6.
  • the converter 47 governs the motion of the electric rotor such as its position, speed and/or acceleration, and thereby the corresponding motion of the mobile contact part 5.
  • the control signals are produced in response to the signals obtained from the record means 42 through the first signal line 54.
  • a storage means 70 is provided. In this storage means 70, measurements and events related to the switching device is logged and stored.
  • a third signal line 56 connects the control unit 43 with a measuring unit 57 in the line 51, on which the switching device operates.
  • the measuring unit is arranged to measure the current in line 51 and the voltage across the switching device. Information on these measurements is sent to the control unit 43 through the signal line 56. This information also affects the control signals from the control unit 43 to the converter 47 and therethrough the operation of the switching device.
  • the information signals from the measuring unit 57 are also used to synchronise the operation of the switching device with the current and/or the voltage.
  • the switching device can be synchronised so that contact part separation occurs at zero crossing of the current or at a predetermined time relation to zero crossing.
  • the switching device can be synchronised so that contact part meeting occurs at a predetermined moment in the voltage cycle.
  • Further inputs to the control unit are formed by fourth 67, fifth 58, sixth 59 and seventh 60 signal lines from various components of the switching device.
  • fourth signal line 67 signals are received from a current measuring unit 45 in the electric coupling 52 between the converter 47 and the electric motor.
  • fifth signal line 58 signals are received from the converter 47, which signals are representative of conditions in the converter, e.g. its temperature.
  • sixth signal line 59 signals are received from a voltage measuring unit 46 in the electric coupling 53 between the capacitor battery 44 and the converter 47.
  • the seventh signal line 60 signals are received from the charger 48.
  • the storage means includes a plurality of logs, namely an operations log, an event/failure log, a last-operation log and a long-time log.
  • the logs thus contain information on measurements, events and failures in the switching device and include operation parameters, such as contact parts position, speed and acceleration, rotor position, speed and acceleration, energy required for operation, temperature in the switching device during operation, voltage across and current through the switching device, data from the converter.
  • the switching device is further provided with a processor 71, operating according to a computer program of a computer program product such as a computer readable medium.
  • the computer program provides instructions to the processor 71 on how the information obtained from the different sources via the signal lines is to be processed in order to create control signals from the control unit 43 for the operation of the switching device.
  • the program also provides instructions on how the stored information affects the processing.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Control Of Electric Motors In General (AREA)
  • Keying Circuit Devices (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Seal Device For Vehicle (AREA)
  • Vehicle Body Suspensions (AREA)
  • Eye Examination Apparatus (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Massaging Devices (AREA)
  • Valve Device For Special Equipments (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Claims (6)

  1. Verfahren zum Auswerten des Zustands einer Schaltvorrichtung, wobei die Schaltvorrichtung Kontaktteile, einen elektrischen Motor (6) und eine mechanische Kopplungs-Vorrichtung (41) umfasst, um Bewegung von dem elektrischen Motor (6) zu mindestens einem der Kontaktteile zu übertragen, wobei ein Selbstdiagnosetest bei einer Komponente der Schaltvorrichtung ausgeführt wird, und dadurch gekennzeichnet, dass der Test ein Durchführen von einer oder mehreren kleinen Motorbewegungen einschließt und dass die Bewegung nur ein Anteil der vollen Unterbrechungs-Bewegung ist und dass durch den Test Daten zum Auswerten des Zustands der Schaltvorrichtung aufgedeckt werden.
  2. Verfahren nach Anspruch 1 auf einer Schaltvorrichtung, weiter umfassend Speichermittel zum Speichern von elektrischer Energie zum Betrieb der Schaltvorrichtung, dadurch gekennzeichnet, dass der Test geringes Laden oder Entladen der Speichermittel einschließt.
  3. Verfahren nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass der Test als ein Ergebnis einer externen Anforderung oder als ein Ergebnis eines Auslösens durch einen internen Zustand ausgeführt wird.
  4. Schaltvorrichtung, welche eingerichtet ist, das Verfahren von Anspruch 1 auszuführen, umfassend Kontaktteile (4, 5), einen elektrischen Motor (6) und eine mechanische Kopplungs-Vorrichtung (41), zur Übertragung von Bewegung von dem elektrischen Motor an das mindestens eine der Kontaktteile, wobei die Schaltvorrichtung weiter Testmittel zum Durchführen von Selbstdiagnosetests umfasst, und das Testmittel Mittel zum Durchführen von kleinen Motorbewegungen einschließt, wobei die Bewegung nur ein Anteil der vollen Unterbrechungs-Bewegung ist.
  5. Schaltvorrichtung nach Anspruch 4, wobei die Schaltvorrichtung weiter Speichermittel zum Speichern von elektrischer Energie zum Betrieb der Schaltvorrichtung umfasst, dadurch gekennzeichnet, dass die Mittel zum Durchführen von Selbstdiagnosetests Mittel zum geringen Laden oder Entladen der Speichermittel einschließt.
  6. Schaltvorrichtung nach einem der Ansprüche 4 oder 5, dadurch gekennzeichnet, dass sie Mittel zum Einleiten eines Selbstdiagnosetests als ein Ergebnis einer externen Anforderung und/oder als ein Ergebnis eines internen Zustands umfasst.
EP01965815A 2000-09-18 2001-09-17 Schaltvorrichtung Expired - Lifetime EP1334500B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE0003371 2000-09-18
SE0003371A SE520438C2 (sv) 2000-09-18 2000-09-18 Elkopplare metod och kontroll
PCT/SE2001/001985 WO2002023571A1 (en) 2000-09-18 2001-09-17 Switching device

Publications (2)

Publication Number Publication Date
EP1334500A1 EP1334500A1 (de) 2003-08-13
EP1334500B1 true EP1334500B1 (de) 2008-04-09

Family

ID=20281102

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01965815A Expired - Lifetime EP1334500B1 (de) 2000-09-18 2001-09-17 Schaltvorrichtung

Country Status (8)

Country Link
EP (1) EP1334500B1 (de)
JP (1) JP2004509435A (de)
CN (1) CN100477052C (de)
AT (1) ATE392002T1 (de)
AU (1) AU2001286373A1 (de)
DE (1) DE60133573T2 (de)
SE (1) SE520438C2 (de)
WO (1) WO2002023571A1 (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004002173A1 (de) * 2004-01-15 2005-08-04 Abb Technology Ag Verfahren zur Untersuchung eines Leistungsschalters
WO2005073992A1 (en) * 2004-01-30 2005-08-11 Abb Technology Ltd. Condition monitor for an electrical distribution device
ATE533063T1 (de) * 2009-04-22 2011-11-15 Omicron Electronics Gmbh Vorrichtung und verfahren zum überprüfen eines schaltvorgangs eines elektrischen schalters
WO2014118875A1 (ja) * 2013-01-29 2014-08-07 株式会社日立製作所 開閉装置
JP6053173B2 (ja) * 2013-11-01 2016-12-27 株式会社日立製作所 開閉装置
WO2022148539A1 (en) * 2021-01-08 2022-07-14 Hitachi Energy Switzerland Ag Power system, circuit breaker and controlling method thereof

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3224165A1 (de) * 1982-06-29 1983-12-29 Brown, Boveri & Cie Ag, 6800 Mannheim Elektromagnetische vorrichtung zum antrieb eines gekapselten schaltgeraetes fuer mittelspannungs- oder hochspannungsschalt- und -verteileranlagen
US5754386A (en) * 1996-06-28 1998-05-19 Siemens Energy And Automation, Inc. Trip device for an electric powered trip unit
DE19817942A1 (de) * 1998-04-17 1999-10-28 Siemens Ag Steuereinrichtung für einen Hochspannungsschalter und Verfahren zum Betreiben des Hochspannungsschalters
US6144235A (en) * 1998-08-31 2000-11-07 Square D Company Control circuit for a motor-operated switch
JP2002532842A (ja) * 1998-12-16 2002-10-02 エービービー エービー 電気開閉器の駆動及び制御装置

Also Published As

Publication number Publication date
SE520438C2 (sv) 2003-07-08
CN1475020A (zh) 2004-02-11
WO2002023571A1 (en) 2002-03-21
CN100477052C (zh) 2009-04-08
ATE392002T1 (de) 2008-04-15
SE0003371D0 (sv) 2000-09-18
JP2004509435A (ja) 2004-03-25
DE60133573T2 (de) 2009-06-04
DE60133573D1 (de) 2008-05-21
AU2001286373A1 (en) 2002-03-26
EP1334500A1 (de) 2003-08-13

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