EP2926359A1 - Appareil de coupure - Google Patents

Appareil de coupure

Info

Publication number
EP2926359A1
EP2926359A1 EP13802307.2A EP13802307A EP2926359A1 EP 2926359 A1 EP2926359 A1 EP 2926359A1 EP 13802307 A EP13802307 A EP 13802307A EP 2926359 A1 EP2926359 A1 EP 2926359A1
Authority
EP
European Patent Office
Prior art keywords
switching
switching device
connecting line
trip coil
circuit
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Withdrawn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
EP13802307.2A
Other languages
German (de)
English (en)
Inventor
Goran SARANCIC
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.)
Eaton Industries Austria GmbH
Original Assignee
Eaton Industries Austria GmbH
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 Eaton Industries Austria GmbH filed Critical Eaton Industries Austria GmbH
Publication of EP2926359A1 publication Critical patent/EP2926359A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
    • H01H83/14—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by imbalance of two or more currents or voltages, e.g. for differential protection
    • H01H83/144—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by imbalance of two or more currents or voltages, e.g. for differential protection with differential transformer
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H1/00—Details of emergency protective circuit arrangements
    • H02H1/04—Arrangements for preventing response to transient abnormal conditions, e.g. to lightning or to short duration over voltage or oscillations; Damping the influence of dc component by short circuits in ac networks

Definitions

  • the invention relates to a switching device according to the preamble of claim 1.
  • switching devices which are provided and designed to turn off automatically in certain electrical conditions and to separate a downstream electrical circuit of a supply network.
  • Such switching devices which are also referred to as a self-switch or circuit breaker, usually have a so-called.
  • Trigger on which operates a switching device to open the switch.
  • switching devices which have a trigger with a trip coil for electromagnetic actuation of the switching apparatus, wherein the trip coil derives their energy from the electrical network to be monitored.
  • a disadvantage of such trained switching devices is that they have a certain susceptibility to interference. Thus, with an increased occurrence of transient voltage peaks, false tripping may occur. Furthermore, it can come at very high voltage spikes, such as due to a lightning strike to a destruction of the trip coil, and this can lead to a failure of the relevant circuit breaker, which due to continue
  • closed switch contacts usually remains unrecognized, which human lives and equipment are at risk.
  • the object of the invention is therefore to provide a switching device of the type mentioned, with which the mentioned disadvantages can be avoided, which is a high
  • FIG. 1 shows a schematic representation of a switching device according to the invention with a tripping coil connected according to a first preferred embodiment
  • FIG. 2 shows a trip coil connected according to a second preferred embodiment for a switching device
  • Fig. 3 is a, connected according to a third preferred embodiment trip coil for a switching device.
  • FIG. 1 shows a schematic representation of a designed as a residual current circuit breaker switching device 1, with a first switching path 2 and a second switching path 3, which each have isolating contacts 4, wherein the switching device 1 a
  • Connecting line 7 is circuitally connected to the first switching path 2, and wherein the trip coil 6 by means of a second connecting line 8, in which a
  • Actuator 9 is arranged, is connected to the second switching path 3, wherein the first connecting line 7 is connected by means of a varistor 10 to the second connecting line 8.
  • a switching device 1 has virtually the same manufacturing effort as conventional switching devices.
  • the subject invention will be described below with reference to a preferred embodiment of the switching device 1 as a residual current circuit breaker, but can also be applied to other types of switching devices 1, circuit breakers or protective devices, such as those in which no self-switching is provided, but for example, a remote shutdown due an external shutdown signal.
  • a circuit breaker while a switching device 1 is referred to, which is able to automatically cause a switching operation when a predeterminable electrical state occurs and to separate an electrical circuit from a power supply.
  • the subject invention relates in particular to switching devices 1 for the low-voltage range, therefore for voltages up to approximately 400 V.
  • the switching device 1 has at least one first and one second switching path 2, 3.
  • Embodiments with further switching paths, in particular with three or four switching paths, are also preferred.
  • isolating contacts 4 are arranged, therefore switch contacts, which in a closed state, the respective switching paths 2, 3 close and thus enable a current flow over the relevant switching path 2, 3 by the switching device 1.
  • As a switching path 2, 3 while the corresponding conductive connection is designated by the switching device 1.
  • the switching device 1 preferably has an insulating housing, as well as terminals 20 which limit the switching paths 2, 3. It is provided that the switching paths 2, 3 of the switching device 1 are connected by means of the terminals 20 with electrical conductors of an electrical network, to which conductors different electrical potentials applied, such as an outer conductor L and a neutral conductor N.
  • a subject switching device 1 as a residual current circuit breaker, this has a humming current transformer 15, wherein the first and a second switching path 2, 3 form the primary windings 16, and wherein further a secondary winding 17 is provided, which circuitry with a
  • Trigger circuit 14 is connected.
  • the trigger circuit 14 is not described in detail, and has per se known means and devices for the evaluation of a by the
  • the trigger circuit 14 is designed as a mains voltage-dependent triggering circuit, and has a power supply.
  • the isolating contacts 4 are preferably connected to each other such that they at a Open and / or close are operated together. Preferred are the
  • the switching device 1 has a switching mechanism 5 and a tripping coil 6 for actuating the switching mechanism 5.
  • the switching mechanism 5 is preferably designed as a switch lock, which is in mechanical operative connection with the isolating contacts 4, in particular with the preferably provided switching shaft.
  • the trip coil 6 is part of an electromagnetic release, which in addition to the
  • Trigger coil 6 further comprises a plunger, which is under the action of the magnetic field, which is caused by the, supplied with electric power or energized trip coil 6, is moved.
  • the plunger in question is preferably arranged longitudinally displaceable in the interior of the trip coil 6, wherein other arrangements may be provided.
  • the electromagnetic release further comprises a yoke.
  • the electromagnetic release is preferably arranged in the switching device 1, that caused by the trip coil 6 movement of the - not shown plunger - the switching mechanism 5 is actuated and thus causes the opening of the isolating contacts 4.
  • the relevant mechanical operative connection between the electromagnetic release is illustrated in FIG. 1 by the double dashed line 19. In this case, an actual mechanical contact between the plunger and a part of the switching mechanism 5 preferably takes place only in the case of triggering.
  • the trip coil 6 is connected by means of a first connecting line 7 circuitry with the first switching path 2, and connected by means of a second connecting line 8 with the second switching path 3. It is particularly provided that the switching device 1 terminals 20, which are designated, with the electrical
  • connection is preferably provided that the first and the second connecting line 7, 8, the first and the second switching path 2, 3 between, for connecting the
  • an actuating element 9 is arranged, with which the trip coil 6 can be supplied controlled with electrical current.
  • the actuating element 9 is in particular a switch or switching element, in particular a semiconductor switching element, such as a thyristor. It is preferably provided that the actuating element 9 is formed as part of a trigger circuit 14.
  • the trigger circuit 14 is shown as a schematic block, wherein the actuating element 9 is shown schematically as a switch in this block.
  • the subject invention is provided that in the second connecting line 8, a rectifier circuit 12 is arranged, and that the actuating element 9 is connected to a DC voltage output 13 of the rectifier circuit 12. This can polarity problems in the formation of the actuating element 9 as
  • the rectifier circuit 12 which is designed according to the illustrated preferred embodiments as a Graetz bridge, is considered as part of the second connecting line 8, as well as any leads to
  • the first connecting line 7 is connected by means of a varistor 10 to the second connecting line 8.
  • a varistor 10 can be effective
  • the trip coil 6 can be dimensioned such that it can be operated even at low applied supply voltages of about 50 V, for actuating the
  • Switching mechanism 5 generates sufficient magnetic field, and at the same time survives voltage peaks of several kV non-destructive.
  • it is provided, and as shown in Fig. 1, that in the first connecting line 7 at least one resistor 11, with specifiable resistance, is arranged, whereby in the case of a switching of the varistor 10, which can be limited via these outflowing streams and such Varistor 10 can be protected.
  • It may also be provided, as shown in Fig. 3, and as known per se to arrange a plurality of resistors 11 in series. It can also be provided to arrange the at least one resistor 11 in the connecting line 8.
  • Fig. 2 shows a connected according to a second preferred embodiment
  • Connecting line 8 is arranged.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Breakers (AREA)

Abstract

L'invention concerne un appareil de coupure (1), en particulier un disjoncteur de protection, comprenant une première branche de commutation (2) et une seconde branche de commutation (3) comportant chacune des contacts de sectionnement (4). L'appareil de coupure (1) comporte un mécanisme de manœuvre (5) et une bobine d'excitation (6). Le mécanisme de manœuvre (5) est relié aux contacts de sectionnement (4). La bobine d'excitation (6) est reliée à la première branche de commutation (2) au moyen d'un premier circuit de liaison (7) et à la seconde branche de commutation (3) au moyen d'un second circuit de liaison (8) dans lequel est disposé un élément actionneur (9). Selon l'invention, le premier circuit de liaison (7) est relié par une varistance (10) au second circuit de liaison (8).
EP13802307.2A 2012-11-29 2013-11-29 Appareil de coupure Withdrawn EP2926359A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012111620 2012-11-29
PCT/EP2013/075177 WO2014083190A1 (fr) 2012-11-29 2013-11-29 Appareil de coupure

Publications (1)

Publication Number Publication Date
EP2926359A1 true EP2926359A1 (fr) 2015-10-07

Family

ID=49726736

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13802307.2A Withdrawn EP2926359A1 (fr) 2012-11-29 2013-11-29 Appareil de coupure

Country Status (2)

Country Link
EP (1) EP2926359A1 (fr)
WO (1) WO2014083190A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107863757A (zh) * 2017-11-28 2018-03-30 宁波伊顿电力科技有限公司 开关分合闸的应急保护方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5517165A (en) * 1991-07-22 1996-05-14 Pdl Holdings Limited Switch mechanism

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT385155B (de) * 1984-08-10 1988-02-25 Schrack Elektronik Ag Schaltungsanordnung zur steuerung einer netz-schalteinrichtung
IE880341L (en) * 1988-02-08 1989-08-08 Patrick Ward Ground fault current interrupter circuit
NZ524371A (en) * 2002-03-12 2004-03-26 H Circuit breaker having a primary contact, wherein the test and activation circuits are disconnected from mains when primary contact is open
US7719804B1 (en) * 2005-03-15 2010-05-18 Pass & Seymour, Inc. Protective device with improved surge protection

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5517165A (en) * 1991-07-22 1996-05-14 Pdl Holdings Limited Switch mechanism

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2014083190A1 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107863757A (zh) * 2017-11-28 2018-03-30 宁波伊顿电力科技有限公司 开关分合闸的应急保护方法
CN107863757B (zh) * 2017-11-28 2019-03-26 宁波伊顿电力科技有限公司 开关分合闸的应急保护方法

Also Published As

Publication number Publication date
WO2014083190A1 (fr) 2014-06-05

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