EP1017071A2 - Leistungsschalter - Google Patents

Leistungsschalter Download PDF

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Publication number
EP1017071A2
EP1017071A2 EP99204309A EP99204309A EP1017071A2 EP 1017071 A2 EP1017071 A2 EP 1017071A2 EP 99204309 A EP99204309 A EP 99204309A EP 99204309 A EP99204309 A EP 99204309A EP 1017071 A2 EP1017071 A2 EP 1017071A2
Authority
EP
European Patent Office
Prior art keywords
circuit breaker
moving contact
active device
breaker according
motion
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.)
Granted
Application number
EP99204309A
Other languages
English (en)
French (fr)
Other versions
EP1017071B1 (de
EP1017071A3 (de
Inventor
Renzo Bazzocchi
Stefano Poretta
Carlo Cereda
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 Service SRL
Original Assignee
ABB Ricerca SpA
ABB Service SRL
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 Ricerca SpA, ABB Service SRL filed Critical ABB Ricerca SpA
Publication of EP1017071A2 publication Critical patent/EP1017071A2/de
Publication of EP1017071A3 publication Critical patent/EP1017071A3/de
Application granted granted Critical
Publication of EP1017071B1 publication Critical patent/EP1017071B1/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
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/44—Devices 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
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/60—Mechanical arrangements for preventing or damping vibration or shock
    • H01H3/605—Mechanical arrangements for preventing or damping vibration or shock making use of a fluid damper
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H7/00—Devices for introducing a predetermined time delay between the initiation of the switching operation and the opening or closing of the contacts
    • H01H7/16—Devices 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
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/54—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
    • H01H9/56—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere for ensuring operation of the switch at a predetermined point in the ac cycle
    • H01H9/563—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere for ensuring operation of the switch at a predetermined point in the ac cycle for multipolar switches, e.g. different timing for different phases, selecting phase with first zero-crossing

Definitions

  • the present invention relates to a circuit breaker provided with an active device for modulating the motion of the contacts of the circuit breaker.
  • the present invention is particularly suitable for use in medium- and high-voltage applications (i.e. for a voltage range higher than 1 KV) and is now described with reference to these applications without intending to limit the scope of its application in any way.
  • Conventional circuit breakers particularly for medium and high voltage applications, generally comprise at least a fixed contact and a moving contact that can be mutually coupled/separated for performing a closing/opening operation.
  • Said moving contact is generally operated by actuators, that are provided according to different types.
  • said actuators comprise mechanical devices, such as for example spring-operated controls, in which there is no dynamic control over the motion of the contact of the circuit breaker during transition.
  • These actuators are applied both in circuit breakers being single-or three-phased and are provided, for example, with a spring-operated control for each pole of the circuit breaker.
  • a second type of actuators comprises electromechanical devices, wherein the stroke of the moving contact is controlled by modulating the active force that moves the contact.
  • These electromechanical devices comprise, for example, two coils that are excited following an actuation command and supply, by means of the magnetic field that they produce, the traction force required to control the contacts of the circuit breaker both during closure and during opening.
  • the first type of actuators described falls in the category of the so-called “non-synchronized controls", whereas the second type within the category of the so-called “synchronized controls”.
  • the main drawback is that it is not possible to synchronize the transition of the contacts with the phase of the electric line. This fact does not allow optimizing the management of electric power in the power distribution network.
  • the synchronized controls even if they represent a step forward in the state of the art, have the drawback of entailing high power consumption and very high energy levels. So, it is necessary to use large capacitors and coils in order to ensure the electric power required to perform the corresponding mechanical movement. Moreover, complicated algorithms are used to control the stroke of the moving contact during opening/closing operations. Finally, for circuit breakers with three-phase control the cost of synchronized-type controls is remarkably high.
  • the aim of the present invention is to provide an improved circuit breaker, which can overcome the mentioned drawbacks in a simple and reliable manner, both for single- or three-phased circuit breakers.
  • an object of the present invention is to provide a circuit breaker provided with an active device for the synchronous movement of the contacts with the electric phase of each pole.
  • Another object of the present invention is to provide a circuit breaker provided with an active device for the synchronous movement of the moving contact in which the response times and the power levels used to move the contacts are modest with respect to circuit breakers provided with conventional actuators.
  • Another object of the present invention is to provide a circuit breaker provided with an active device for the synchronous movement of the moving contact which is compact and does not require capacitors for the transition of the contacts.
  • Another object of the present invention is to provide a circuit breaker provided with an active device for the synchronous movement of the moving contact in which the algorithms for controlling the stroke during the transition of the contacts are more simple than the control algorithms currently being used.
  • Another object of the present invention is to provide a circuit breaker provided with an active device for the synchronous movement of the moving contact, which is relatively easy to manufacture and at competitive costs.
  • circuit breaker comprising:
  • the present invention is characterized by the fact of comprising an active device which is operatively connected to said moving contact and modulates the motion of said moving contact by applying an adjustable force.
  • a circuit breaker according to the invention of the type with single-pole control, is shown schematically by means of its fixed contact 1 and its corresponding moving contact 2 which can be operated by actuating means 4 in order to perform a closing/opening operation, according to requirements.
  • the moving contact 2 is operatively connected to an active device 3.
  • Figure 1 illustrates the case in which the moving contact 2 is in the open position and Figure 2 illustrates the case in which said moving contact 2 moved into the closed position against the fixed contact 1.
  • the actuation means 4 can comprise, for example, elastic means, as shown in Figures 1 and 2, or an electromagnetic device or in any actuator that provides the energy for operating the moving contact 2.
  • FIG. 1 and 2 therefore provides for the use of an active device 3, shown schematically also in Figure 3, which comprises a body 5, for example cylindrical, which contains a fluid with variable viscosity.
  • a magneto-rheological fluid can be used. Fluids of this type have the property of monotonically varying their viscosity according to the magnetic field applied to them.
  • the active device 3 included in the circuit breaker allows to modulate the energy transmitted to the moving contact 2 by the actuation means 4.
  • a stem 6 can move; said stem can be connected to the moving contact 2 of the circuit breaker 2.
  • the active device 3 preferably comprises control magnetic circuits 7 for inducing a magnetic field and control circuits 9 for exciting said magnetic circuits 7.
  • the stem 6 preferably comprises gauged holes 8 for the flow of the magneto-rheological fluid 10 contained inside the body 5.
  • the body 5 can be closed by a breech 14.
  • the actuation means 4 provide the energy for moving the moving contact 2 so that it opens and closes.
  • the sensor means 13 report the position of the moving contact 2 to the control circuits 9, which modulate the excitation current of the magnetic circuits 7.
  • the intensity of the magnetic field applied to the fluid 10, and therefore the viscosity of said fluid are thus modulated according to the position of the moving contact 2.
  • the breech 14 is connected to a fixed point of the circuit breaker, while the stem 6 is connected to the movable contact 2.
  • the actuation means 4 are operatively connected to said moving contact 2 so as to transmit the motion to said moving contact in parallel to said active device 3.
  • the modulation of the viscosity of the fluid 10 allows modulating the stroke of the stem 6 of the active device 3, in contrast with the motion imparted to the moving contact by the actuation means 4.
  • the active device 3 applies an adjustable force to the movement of the moving contact which, in this embodiment, consists of an adjustable capacity of braking the motion of the moving contact.
  • the modulation of the braking force applied by the active device 3 to the force applied to the actuation means 4 of Figure 1 is useful for compensating all the phenomena that contribute to the deterioration of the behavior of circuit breakers over time, i.e., higher friction, aging of the components, etcetera, which alter their response times to an opening or closure command.
  • the active device 3 can comprise a breech 14, which is movable and is connected to motion transmission means 11 that are moved by the actuation means 4.
  • the stem 6 is operatively connected to the moving contact 2 of the circuit breaker.
  • the block 120 can be a pole of a single-phase circuit breaker or, as represented in figure 4, a pole of a three-phase circuit breaker.
  • the actuation means 4 can be present for each individual pole of the circuit breaker or can constitute a single actuation device, as shown in Figure 4.
  • the actuation means 4 provide the energy for moving the moving contacts 2 of the circuit breaker by means of the motion transmission means 11, which are operatively connected to breeches 14 of each active device 3.
  • the breeches 14 can move and are rigidly coupled to the motion transmission means 11.
  • the movement of each moving contact can be modulated independently by virtue of the modulation of the viscosity of the magneto-rheological fluid contained in each one of the active devices 3.
  • the control circuits 9 of each active device 3 modulate the excitation current of the magnetic circuits 7 contained in each active device 3.
  • the modulation can be done on the basis of:
  • the magnetic field applied to the fluid, and therefore the viscosity of said fluid, is modulated accordingly.
  • the modulation of the viscosity of the magneto-rheological fluid implies, thanks to the above-described serial-type connection, a modulation of the capacity of the movable breech 14 to transmit rigidly to the stem 6, and accordingly to the moving contact 2, in a rigid manner.
  • the breech 14 transmits the motion to the stem 6 and therefore to the moving contact 2 in a rigid manner.
  • each active device 3 applies an adjustable force to the movement of the moving contact, which in this case consists of an adjustable capacity to transmit the motion to the moving contact.
  • the actuation means 4 can preferably comprise a single actuator operatively connected with the active devices of each pole.
  • each active device 3 can act independently.
  • the movement of the three moving contacts 2 occurs in different times for each one of the moving contacts 2 and the time difference is correlated to the different viscosity of the fluid 10 that is present in the active devices 3, which therefore entails a different response of said active devices 3.
  • phase difference of the three transitions of the three moving contacts 2 on the three phases and their synchronization are achieved with different elongations along the directrix of movement of each moving contact 2.
  • the transmission of the motion between said actuation means and said moving contact inside the circuit breaker can also be of the rotary type.
  • FIG. 5 An embodiment of a circuit breaker with three-phase control according to the present invention, in which motion transmission is of the rotary type, is illustrated with reference to Figure 5.
  • actuation means 20 constituted for example by elastic means, impart a translatory motion to a link 22.
  • the motion transmission means 23 are constituted, in this case, for example by a rod-and-link system.
  • the rotary motion is transmitted by means of the active devices 24 to the moving contact 30 that rotates toward the fixed contact 31.
  • the rotational motion transmitted to the moving contact can be re-transformed in a linear motion by second motion transmission means, which are operatively connected between the active device 24 and the moving contact 30.
  • the active devices 24 can comprise sensor means 33 for sensing the position of the moving contact and measuring means 32 for detecting the electrical phase.
  • the sensor means 33 and the measuring means 32 send signals to the control devices 29, which modulate the excitation current of the magnetic circuits of each active device 24 (not shown in Figure 5).
  • the active device 3 can comprise a first disks 25 and a second disk 26 that are spaced by a gap 28 filled with magneto-rheological fluid.
  • the disks 25 and 26 can be concentric as illustrated in figure 5 or positioned so as to face each other. This kinds of structures can be used also for other embodiments of the circuit breaker, according to the present invention, in which a rotary transmission of the motion is considered.
  • the first disk 25 is operatively connected to the motion transmission means 23, while the second disk 26 is operatively connected, for example through a shaft 35, to the moving contact 30 or to said second motion transmission means (not illustrated).
  • Bearings 34 can be provided between the disk 25 and the shaft 35.
  • Magnetic circuits 27 Proximate to the gap 28 there are magnetic circuits 27 for inducing a magnetic field in the magneto-rheological fluid.
  • the magnetic circuits 27 are connected to the power supply and control circuits 29.
  • the disk 25 is turned by the motion transmission means 23.
  • the power supply and control devices 29 of each active device 24 on the basis of the knowledge of the behavior of the electrical phase by means of the measurement means 32 and of the knowledge of the position of the moving contact thanks to the sensor means 33, modulate the excitation current of the magnetic circuits 27 contained in each active device 24.
  • the magnetic field applied to the fluid, and therefore the viscosity of said fluid, are modulated accordingly.
  • the modulation of the viscosity of the magneto-rheological fluid entails, thanks to the above-described serial-type connection, a modulation of the capacity of the disk 25 to transmit motion to the disk 26 and accordingly to the moving contact 30. If the viscosity of the magneto-rheological fluid is high, the disk 25 transmits the rotary motion to the disk 26 and therefore to the moving contact 30 in a rigid fashion.
  • each active device 24 applies an adjustable force to the movement of the moving contact which in this case consists of an adjustable capacity to transmit the rotary motion to the moving contact.
  • Each device 24 can act independently.
  • the active device 3 can apply an adjustable force to the moving contact which can consist of an adjustable capacity of braking the rotary motion of said moving contact operated by said actuation means.
  • said first disk can be connected to a fixed point of the circuit breaker while said second disk can be operatively connected to the moving contact.
  • the active means can be operatively connected to the moving contact so as to transmit it the motion in parallel to said second disk.
  • circuit breaker according to the present invention fully achieves the intended aim, since it allows, both in the single-phase case and in the three-phase case, to have control over the actuation force of said moving contact in a simple amd reliable manner both for sigle- and three-phased circuit breakers.
  • circuit breaker thus conceived is susceptible of numerous modifications and variations, all of which are within the scope of the inventive concept; all the details may also be replaced with other technically equivalent elements.
  • the materials employed may be any according to requirements and to the state of the art.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Breakers (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Push-Button Switches (AREA)
  • Switch Cases, Indication, And Locking (AREA)
  • Saccharide Compounds (AREA)
EP99204309A 1998-12-30 1999-12-15 Leistungsschalter Expired - Lifetime EP1017071B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT1998MI002862A IT1304072B1 (it) 1998-12-30 1998-12-30 Interruttore di corrente avente funzionalita' migliorata
ITMI982862 1998-12-30

Publications (3)

Publication Number Publication Date
EP1017071A2 true EP1017071A2 (de) 2000-07-05
EP1017071A3 EP1017071A3 (de) 2002-11-06
EP1017071B1 EP1017071B1 (de) 2006-06-07

Family

ID=11381383

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99204309A Expired - Lifetime EP1017071B1 (de) 1998-12-30 1999-12-15 Leistungsschalter

Country Status (5)

Country Link
EP (1) EP1017071B1 (de)
AT (1) ATE329358T1 (de)
DE (1) DE69931743T2 (de)
ES (1) ES2267224T3 (de)
IT (1) IT1304072B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2899717A1 (fr) * 2006-04-11 2007-10-12 Schneider Electric Ind Sas Dispositif de coupure electrique destine a la mise sous tension ou a la mise hors tension d'un equipement electrique
EP3475964B1 (de) * 2016-08-22 2021-04-14 Siemens Energy Global GmbH & Co. KG Vorrichtung und verfahren zum schalten von mittel- und/oder hochspannungen mit bestimmter antriebscharakteristik

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3610855A (en) * 1968-12-30 1971-10-05 Inoue Electric Mfg Co Ltd Oil circuit breaker including contact braking device
US4195211A (en) * 1976-06-18 1980-03-25 I-T-E Imperial Corporation Single pole trip and ganged pole closing for multiphase high-voltage power circuit breakers
US4387280A (en) * 1978-05-29 1983-06-07 General Electric Company High speed hydraulically-actuated operating system for an electric circuit breaker
US4535208A (en) * 1983-01-25 1985-08-13 Sprecher & Schuh Ag Actuating device for a high-voltage switch
US5389905A (en) * 1992-04-22 1995-02-14 Matsushita Electric Works, Ltd. Damper, electromagnet assembly employing the damper, and relay employing the electromagnet assemblies
EP0817225A1 (de) * 1996-06-26 1998-01-07 GEC Alsthom T&D AG Mehrpoliger Schalter, insbesondere für Hochspannung

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3610855A (en) * 1968-12-30 1971-10-05 Inoue Electric Mfg Co Ltd Oil circuit breaker including contact braking device
US4195211A (en) * 1976-06-18 1980-03-25 I-T-E Imperial Corporation Single pole trip and ganged pole closing for multiphase high-voltage power circuit breakers
US4387280A (en) * 1978-05-29 1983-06-07 General Electric Company High speed hydraulically-actuated operating system for an electric circuit breaker
US4535208A (en) * 1983-01-25 1985-08-13 Sprecher & Schuh Ag Actuating device for a high-voltage switch
US5389905A (en) * 1992-04-22 1995-02-14 Matsushita Electric Works, Ltd. Damper, electromagnet assembly employing the damper, and relay employing the electromagnet assemblies
EP0817225A1 (de) * 1996-06-26 1998-01-07 GEC Alsthom T&D AG Mehrpoliger Schalter, insbesondere für Hochspannung

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2899717A1 (fr) * 2006-04-11 2007-10-12 Schneider Electric Ind Sas Dispositif de coupure electrique destine a la mise sous tension ou a la mise hors tension d'un equipement electrique
EP3475964B1 (de) * 2016-08-22 2021-04-14 Siemens Energy Global GmbH & Co. KG Vorrichtung und verfahren zum schalten von mittel- und/oder hochspannungen mit bestimmter antriebscharakteristik

Also Published As

Publication number Publication date
ITMI982862A0 (it) 1998-12-30
ITMI982862A1 (it) 2000-06-30
DE69931743D1 (de) 2006-07-20
EP1017071B1 (de) 2006-06-07
ES2267224T3 (es) 2007-03-01
ATE329358T1 (de) 2006-06-15
IT1304072B1 (it) 2001-03-07
DE69931743T2 (de) 2007-05-31
EP1017071A3 (de) 2002-11-06

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