EP0806781A1 - Schaltung zur geschützten Versorgung einer elektrischen Last - Google Patents

Schaltung zur geschützten Versorgung einer elektrischen Last Download PDF

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Publication number
EP0806781A1
EP0806781A1 EP97400951A EP97400951A EP0806781A1 EP 0806781 A1 EP0806781 A1 EP 0806781A1 EP 97400951 A EP97400951 A EP 97400951A EP 97400951 A EP97400951 A EP 97400951A EP 0806781 A1 EP0806781 A1 EP 0806781A1
Authority
EP
European Patent Office
Prior art keywords
circuit
electronic switch
load
switch
contactor
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
EP97400951A
Other languages
English (en)
French (fr)
Other versions
EP0806781B1 (de
Inventor
Jean Abot
Alain Gousset
Nicolas Hertzog
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.)
Schneider Electric Industries SAS
Original Assignee
Schneider Electric SE
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 Schneider Electric SE filed Critical Schneider Electric SE
Publication of EP0806781A1 publication Critical patent/EP0806781A1/de
Application granted granted Critical
Publication of EP0806781B1 publication Critical patent/EP0806781B1/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
    • 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
    • H01H9/541—Contacts shunted by semiconductor devices
    • H01H9/542—Contacts shunted by static switch means
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H89/00—Combinations of two or more different basic types of electric switches, relays, selectors and emergency protective devices, not covered by any single one of the other main groups of this subclass
    • H01H89/06—Combination of a manual reset circuit with a contactor, i.e. the same circuit controlled by both a protective and a remote control device
    • 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
    • H01H9/548—Electromechanical and static switch connected in series

Definitions

  • the present invention relates to a circuit for the protected supply of an electrical load with alternating current, this circuit comprising an electromechanical protection switch and a bidirectional electronic switch placed in series, downstream of the protection switch, and controlled by a control device for ensuring gradual operation of the load; in parallel to the electronic switch is mounted a shunt switch which ensures continuous operation of the load.
  • Such a circuit is known from patent application EP 633584.
  • the electronic device is used for periods of starting and / or gradual stopping of the load while the shunt switch is operated outside of these periods to avoid overheating of the electronic switch.
  • the role of the protection switch is to protect the main current path in the event of detection of a fault current; however, its response time is too long to effectively protect the electronic switch or the bypass contactor during operation.
  • the present invention therefore aims to use a shunting contactor of standard dimensions, the protection of which is nevertheless ensured upon detection of a fault current.
  • the supply circuit is characterized in that an electrical component intended for establishing a DC voltage at the terminals of the electronic switch is connected in series to the shunt contactor and upstream of it.
  • the electrical component preferably consists of a resistor or a transformer, the impedance of which is chosen so as to make it conductive, when an overload current appears in the circuit and during a phase of continuous operation of the load, the electronic switch on which control pulses are sent periodically.
  • FIG. 1 shows a supply circuit 10 for an electric charge such as a single- or multi-phase motor M.
  • the supply circuit 10 is connected to the conductors of a three-phase distribution network U, V, W.
  • an electromechanical protection switch 20 and an electronic switch 30 there are placed on one or more phases and in series an electromechanical protection switch 20 and an electronic switch 30; the electronic switch 30 is controlled by a pulse modulation control device 40 to modulate the energy supplied to the motor.
  • a pulse modulation control device 40 to modulate the energy supplied to the motor.
  • the motor M is supplied only when the electromechanical protection switch 20, such as a circuit breaker comprising movable contacts cooperating with fixed contacts, is closed, then the control device 40 has closed the electronic switch 30, the current passing through a main current path C.
  • the electromechanical protection switch 20 such as a circuit breaker comprising movable contacts cooperating with fixed contacts
  • the electronic switch 30 is controlled by the pulse modulation control device 40 to thereby form an electronic dimmer in order to deliver graduated energy to the motor during the starting and deceleration phases so as to ensure its progressiveness.
  • the electronic switch 30 is constituted by two thyristors mounted head to tail in parallel or by any other controllable bi-directional semiconductor switch; it is connected by an upstream terminal 31 to the electromechanical protection switch 20 and by a downstream terminal 32 to the motor M.
  • an electromechanical shunt contactor 50 comprising main contacts 51, 52; the contactor also includes an electromagnet whose coil 53 has terminals connected to the control device 40 and which determines the opening and closing of the contacts 51, 52. These contacts are closed outside of a start-up phase or engine braking when it is desired to supply the motor with unmodulated energy.
  • the current bypass through the path C1 of the contactor 50 makes it possible not to overheat the thyristors.
  • an electrical component 60 capable of establishing a DC voltage V at the terminals of the thyristors when the contacts 51, 52 of the contactor are closed.
  • the electrical component 60 has an upstream terminal 61 connected to the upstream terminal 31 of the electronic switch 30 and a downstream terminal 62 connected to the upstream terminal 51 of the contactor 50, the downstream terminal 52 of which is connected to the static switch 30.
  • the electrical component 60 can be constituted by a resistor R (FIG. 1) or by a transformer T (FIG. 2).
  • the use of the transformer T can make it possible to supply a branch circuit 11 of the circuit 10.
  • the impedance of the resistance R or the impedance of the primary of the transformer T is chosen so as to establish a voltage V sufficient for the thyristors, on which the device 40 continuously sends control pulses, to be conductive to the passage of a overcurrent on the main current path C.
  • FIG 3 shows the circuit of Figure 1 to which is added an electric arc jump device 70 of known type associated with the switch 20.
  • the device 70 is for example an arc transfer electrode, located in a part at a short distance from the upstream fixed contact of the switch 20 connected to the network, and on the other hand connected to the downstream terminal 32 of the electronic switch 30.
  • the device 70 has the function of protecting the electronic switch 30, during a phase of its operation, by deriving the current when an overcurrent appears on the main current path C in order to avoid that the switch 30 is crossed by the arc current generated during the opening of the contacts of the switch 20.
  • the protection switch 20 is closed then the control device 40 applies on or off signals to the thyristor control electrode to make the thyristors conductive or non-conductive during the engine start-up phase while the contactor 50 remains open.
  • control device 40 bypasses the thyristors by closing the contactor 50 which supplies continuous energy to the motor, the current flowing in the thyristors is then zero.
  • the device 40 continuously sends control pulses to the thyristors which are however not conductive due to the voltage V at their terminals remaining below the ignition threshold voltage.
  • FIG. 4 illustrates the patterns of the current in the circuit and of the voltage at the terminals of the thyristors when an overload current, due for example to a short circuit, appears on the current path C.
  • the current I C of the main path C increases, causing an increase in the current I C1 passing through the current path C1 when the shunt contactor 50 is closed.
  • the increase in the current I C1 causes an increase in the voltage V at the terminals of the electronic switch 30 to reach the starting voltage, which causes the conduction of the thyristors and therefore the passage through them of a current I T , representing part of the current I C.
  • the current Here increases but remains lower than the repulsion current I R of the contactor corresponding to the welding of the contacts.

Landscapes

  • Emergency Protection Circuit Devices (AREA)
  • Control Of Ac Motors In General (AREA)
EP97400951A 1996-05-10 1997-04-28 Schaltung zur geschützten Versorgung einer elektrischen Last Expired - Lifetime EP0806781B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9605956 1996-05-10
FR9605956A FR2748612B1 (fr) 1996-05-10 1996-05-10 Circuit pour l'alimentation protegee d'une charge electrique

Publications (2)

Publication Number Publication Date
EP0806781A1 true EP0806781A1 (de) 1997-11-12
EP0806781B1 EP0806781B1 (de) 2002-09-11

Family

ID=9492097

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97400951A Expired - Lifetime EP0806781B1 (de) 1996-05-10 1997-04-28 Schaltung zur geschützten Versorgung einer elektrischen Last

Country Status (9)

Country Link
US (1) US5953189A (de)
EP (1) EP0806781B1 (de)
AU (1) AU716799B2 (de)
BR (1) BR9703106A (de)
CZ (1) CZ293753B6 (de)
DE (1) DE69715296T2 (de)
FR (1) FR2748612B1 (de)
TW (1) TW463440B (de)
ZA (1) ZA973974B (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1016791C2 (nl) * 2000-12-04 2002-06-05 Holec Holland Nv Hybride elektrische schakelinrichting.
ES2367936A1 (es) * 2008-02-05 2011-11-11 Ls Industrial Systems Co. Ltd Aparato limitador de corriente de pico.
EP2590314A1 (de) * 2011-11-03 2013-05-08 ABB Technology AG Umrichtersystem sowie leistungselektronisches System mit solchen Umrichtersystemen
WO2014029614A3 (de) * 2012-08-21 2014-10-23 Siemens Aktiengesellschaft Motorstarter
WO2017153098A1 (de) * 2016-03-08 2017-09-14 Siemens Aktiengesellschaft Motorstarter und diagnoseverfahren

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005099080A1 (de) 2004-04-05 2005-10-20 Siemens Aktiengesellschaft Schaltvorrichtung zum betreiben eines motors und entsprechendes verfahren
US8072723B2 (en) * 2007-06-19 2011-12-06 General Electric Company Resettable MEMS micro-switch array based on current limiting apparatus
FR2930091B1 (fr) * 2008-04-09 2011-10-28 Schneider Electric Ind Sas Systeme a relais statique comprenant deux transistors de type jfet en serie
US8922957B2 (en) * 2008-04-30 2014-12-30 Keysight Technologies, Inc. Dynamic switch contact protection
JP5286413B2 (ja) 2009-06-25 2013-09-11 東芝三菱電機産業システム株式会社 低周波遮断器
US8619395B2 (en) 2010-03-12 2013-12-31 Arc Suppression Technologies, Llc Two terminal arc suppressor
KR101044492B1 (ko) * 2010-04-23 2011-06-27 엘에스산전 주식회사 하이브리드 한류기
JP5106606B2 (ja) 2010-09-27 2012-12-26 三菱電機株式会社 放電システムおよび電動車両
CN102244510A (zh) * 2011-05-18 2011-11-16 广州市金矢电子有限公司 触发节能装置及晶闸管开关
US9954464B2 (en) 2012-11-19 2018-04-24 Siemens Aktiengesellschaft Switching device for controlling energy supply of a downstream electric motor
US9270119B2 (en) * 2013-05-24 2016-02-23 Eaton Corporation High voltage direct current transmission and distribution system
CN104660107A (zh) * 2013-11-21 2015-05-27 河南省济源市矿用电器有限责任公司 矿用隔爆兼本安质安全型双接触器低压交流软启动器
CN104730441B (zh) * 2013-12-20 2018-07-17 中国科学院宁波材料技术与工程研究所 晶闸管故障检测装置
CN104752080A (zh) * 2013-12-31 2015-07-01 北京新宇航世纪科技有限公司 具有消弧功能的感性负载直流开关
EP3410601A1 (de) * 2017-06-02 2018-12-05 General Electric Technology GmbH Schaltvorrichtung

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2227624A1 (de) * 1973-04-26 1974-11-22 Franklin Electric Co Inc
EP0633584A1 (de) * 1993-07-05 1995-01-11 Schneider Electric Sa Elektrischer Schutz- und Reglervorrichtung für elektrische Last

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2584529B1 (fr) * 1985-07-04 1995-01-06 Merlin Gerin Disjoncteur-contacteur electrique, notamment pour des batteries de condensateurs

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2227624A1 (de) * 1973-04-26 1974-11-22 Franklin Electric Co Inc
EP0633584A1 (de) * 1993-07-05 1995-01-11 Schneider Electric Sa Elektrischer Schutz- und Reglervorrichtung für elektrische Last

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1016791C2 (nl) * 2000-12-04 2002-06-05 Holec Holland Nv Hybride elektrische schakelinrichting.
WO2002047100A1 (en) * 2000-12-04 2002-06-13 Holec Holland N.V. Hybrid electrical switching device
US7339288B2 (en) 2000-12-04 2008-03-04 Eaton Electric N.V. Hybrid electrical switching device
US7612471B2 (en) 2000-12-04 2009-11-03 Eaton Electric N.V. Hybrid electrical switching device
ES2367936A1 (es) * 2008-02-05 2011-11-11 Ls Industrial Systems Co. Ltd Aparato limitador de corriente de pico.
EP2590314A1 (de) * 2011-11-03 2013-05-08 ABB Technology AG Umrichtersystem sowie leistungselektronisches System mit solchen Umrichtersystemen
WO2014029614A3 (de) * 2012-08-21 2014-10-23 Siemens Aktiengesellschaft Motorstarter
US10253742B2 (en) 2012-08-21 2019-04-09 Siemens Aktiengesellschaft Motor starter
WO2017153098A1 (de) * 2016-03-08 2017-09-14 Siemens Aktiengesellschaft Motorstarter und diagnoseverfahren
CN108781046A (zh) * 2016-03-08 2018-11-09 西门子股份公司 电机启动器和诊断方法
US10873279B2 (en) 2016-03-08 2020-12-22 Siemens Aktiengesellschaft Motor starter and diagnosis method
CN108781046B (zh) * 2016-03-08 2023-02-17 西门子股份公司 电机启动器和诊断方法

Also Published As

Publication number Publication date
BR9703106A (pt) 1998-06-30
AU2009897A (en) 1997-11-13
AU716799B2 (en) 2000-03-09
TW463440B (en) 2001-11-11
FR2748612B1 (fr) 1998-06-19
CZ142397A3 (cs) 1998-12-16
EP0806781B1 (de) 2002-09-11
ZA973974B (en) 1997-12-02
US5953189A (en) 1999-09-14
DE69715296D1 (de) 2002-10-17
FR2748612A1 (fr) 1997-11-14
CZ293753B6 (cs) 2004-07-14
DE69715296T2 (de) 2003-06-12

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