EP1113476A2 - Unité de déclenchement électronique avec fiche de calibrage pour disjoncteur, avec fonction commutable de protection de ligne ou de moteur - Google Patents

Unité de déclenchement électronique avec fiche de calibrage pour disjoncteur, avec fonction commutable de protection de ligne ou de moteur Download PDF

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Publication number
EP1113476A2
EP1113476A2 EP00311530A EP00311530A EP1113476A2 EP 1113476 A2 EP1113476 A2 EP 1113476A2 EP 00311530 A EP00311530 A EP 00311530A EP 00311530 A EP00311530 A EP 00311530A EP 1113476 A2 EP1113476 A2 EP 1113476A2
Authority
EP
European Patent Office
Prior art keywords
circuit breaker
rating
algorithms
function
tripping unit
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Withdrawn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
EP00311530A
Other languages
German (de)
English (en)
Other versions
EP1113476A3 (fr
Inventor
Zoltan Giday
Alan Joseph Messerli
James A. Marple
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.)
General Electric Co
Original Assignee
General Electric Co
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 General Electric Co filed Critical General Electric Co
Publication of EP1113476A2 publication Critical patent/EP1113476A2/fr
Publication of EP1113476A3 publication Critical patent/EP1113476A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/123—Automatic release mechanisms with or without manual release using a solid-state trip unit
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/74—Means for adjusting the conditions under which the device will function to provide protection
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/74—Means for adjusting the conditions under which the device will function to provide protection
    • H01H71/7409—Interchangeable elements

Definitions

  • the invention relates to the field of power distribution systems. More particularly, the invention relates to circuit breakers easily switchable between line protection and motor protection functions.
  • Circuit breakers are used to protect equipment for overcurrent situations caused for example by short circuits in or near such equipment. In the event an overcurrent condition occurs the circuit breaker will open resulting in the separation of contacts therein ending current flow. Circuit breakers open in a number of ways including magnetic fields, temperature, and by computerized systems commonly known as electronic tripping units which include software, running a particular algorithm to detect a particular undesirable current condition. When such condition is matched, the electronic tripping unit causes the circuit breaker to open. There are many different types of devices that can be protected by circuit breakers and circuit breakers themselves are unique to the intended function thereof. In one example, one type of circuit breaker would be designed and built to function as a line protection device while another type of circuit breaker would be designed and built to function as a motor protection device.
  • the electronic tripping units employed with each of these circuit breakers are different and each employ distinct software and algorithms. Additionally the current transformers are usually replaced together with a trip unit. In the older prior art distinct circuit breakers would need to be employed for each different type of function and for each different circuit breaker rating. In order to reduce the number of components in stock, it is known to provide a plurality of different rating plugs which are connectable to a single circuit breaker and electronic trip unit in order to change the rating of the circuit breaker without disassembly of the entire circuit breaker. Such rating plugs work well for their intended purpose and enable quick and easy changing of ratings in the circuit breakers with which they are intended to be used. The art still requires however that completely distinct circuit breakers be employed for line protection functions and for motor protection functions. In order to change a particular circuit from line protection to motor protection, the entire circuit breaker would need to be replaced or the electronic trip unit and current transformers would need to be replaced after disassembly of the circuit breaker.
  • a circuit breaker of the invention includes a contact arm tripable by an electronic tripping unit operably connected to the contact arm.
  • the electronic tripping unit preferably includes at least two independently selectable trip algorithms and a rating plug having a switch in communication with said electronic tripping unit, or a jumper enables rapid "in-the-field" selection between the at least two algorithms for selective functions.
  • FIG. 1 a perspective view of a circuit breaker 10 of the invention is depicted.
  • the breaker 10 includes a housing base 12 and a housing cover 14 each of which are conventional.
  • a contact arm (not shown) is disposed within circuit breaker 10.
  • Also visible in the drawing is a switch handle 16 recognizable by one of ordinary skill in the art.
  • the circuit breaker 10 provides for the connection electrically and mechanically of an electronic trip unit, a current transformer assembly and a rating plug. These are discussed hereunder in connection with Figure 2.
  • the configuration illustrated in Figure 1 is familiar to those of skill in the art.
  • a conventional current transformer carrier 20 carries current transformers 22 (illustrated as three in the drawing although four is also a preferred arrangement for the invention). Each current transformer 22 provides a load lug 24 for connection of the circuit breaker to a desired electrical connection (not shown).
  • Current transformer carrier 20 and the current transformer 22 are received within engagement area 18 as is known to one of ordinary skill in the art.
  • a push-to-trip assembly comprising components 26, 28, 30 and 32 which is conventional is illustrated.
  • an electronic trip unit 34 is mounted to carrier 20 on pins 36. The particular physical attributes of electronic trip unit 34 are known to the art since all of the hardware used therein is conventional.
  • Electronic trip unit 34 is, however, distinct from the prior art since the completed circuit breaker 10 of the invention is to be easily switchable from a line protection circuit breaker to a motor protection circuit breaker.
  • Electronic trip unit 34 (ETU) therefore includes at least two algorithms, one of which is directed to a motor protection function and one of which is directed to a line protection function.
  • the circuit breaker 10 is thus capable of performing either function and need only be "told" which function to undertake.
  • a rating plug 40 includes an electronics assembly 42 with preferably two switches 44a and 44b. Each of which preferably includes a knob 46 for ease of turning of switches 44a and 44b. Plug 40 further includes housing 48 and but for the additional switches are similar in structure to the prior art. Rating plugs of the prior art have employed one switch directed to the rating of the breaker (or in some cases two switches where one is a ground fault interruption); the invention provides two switches, one of which is adapted to select between two algorithms in the electronic trip unit 34 to determine the function (line protection or motor protection) of the breaker and the other of which is adapted to set the desired rating of the circuit breaker.
  • the rating switch preferably provides 32 gradations from .4x to 1x of the breaker fixed rating Ict for each of line protection and motor protection.
  • the 32 gradations are made up of 16 gradations at 63% (0.4x to 0.63 x Ict) and 16 gradations at 100% (0.625 to 1x Ict) of the Ict for each of line protection and motor protection.
  • the settings at 63% and 100% are switchable at one switch while the 16 positions are at the other switch. Since 32 gradations are available for each of line protection and motor protection it will be understood that 64 total settings are possible in the rating plug of the invention without disassembly. It will be understood that the nominal current rating In for the breaker as set by the rating plug is dictated by In ⁇ Ict.
  • the rating plug is connectable to the electronic tripping unit through an opening 50 in electronic tripping unit housing 52.
  • Rating plug 40 is protected by and accessible rating plug cover 54 which engages with cover 14 of circuit breaker 10 when in the completed condition. Because the rating plug 40 is accessible and is capable of switching the circuit breaker function simply and easily.
  • the invention further reduces necessary components for the manufacturer to stock since a single breaker and trip unit can be readily adapted to function as a line protector or a motor protector.
  • the rating plug 40 may dispense with switches in favor of jumpers.
  • the rating plug is removed and another installed when function or nominal current rating is desired to be changed. This embodiment of the invention still greatly simplifies function changeover since it avoids time consuming disassembly and replacement of electronic tripping units and current transformers.

Landscapes

  • Breakers (AREA)
  • Protection Of Generators And Motors (AREA)
  • Emergency Protection Circuit Devices (AREA)
EP00311530A 1999-12-27 2000-12-21 Unité de déclenchement électronique avec fiche de calibrage pour disjoncteur, avec fonction commutable de protection de ligne ou de moteur Withdrawn EP1113476A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US47323899A 1999-12-27 1999-12-27
US473238 1999-12-27

Publications (2)

Publication Number Publication Date
EP1113476A2 true EP1113476A2 (fr) 2001-07-04
EP1113476A3 EP1113476A3 (fr) 2003-03-05

Family

ID=23878731

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00311530A Withdrawn EP1113476A3 (fr) 1999-12-27 2000-12-21 Unité de déclenchement électronique avec fiche de calibrage pour disjoncteur, avec fonction commutable de protection de ligne ou de moteur

Country Status (5)

Country Link
EP (1) EP1113476A3 (fr)
CN (1) CN1302074A (fr)
HU (1) HUP0004986A3 (fr)
MX (1) MXPA00012699A (fr)
PL (1) PL344655A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2079091A1 (fr) * 2008-01-10 2009-07-15 Schneider Electric Industries SAS Boîtier de déclencheur électronique pour disjoncteur, dispositif de déclenchement électronique et procédé d'assemblage
FR2926392A1 (fr) * 2008-01-10 2009-07-17 Schneider Electric Ind Sas Boitier de declencheur electronique pour disjoncteur, dispositif de declenchement electronique et procede d'assemblage
EP2202773A2 (fr) * 2008-12-24 2010-06-30 General Electric Company Calibreur configurable de champ utilisant un signal de communication et de contrôle
EP2202860A2 (fr) * 2008-12-29 2010-06-30 General Electric Company Calibreur universel pour unité de déclenchement électronique

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10306548B4 (de) * 2003-02-17 2005-02-03 Wöhner GmbH & Co. KG Elektrotechnische Systeme Schutzschaltereinrichtung
FR2926393B1 (fr) * 2008-01-10 2009-12-18 Schneider Electric Ind Sas Bloc de transformation d'un declencheur electronique a double passage
US7948343B2 (en) * 2008-06-30 2011-05-24 Eaton Corporation Settings emulator for a circuit interrupter trip unit and system including the same

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2288498A (en) * 1994-04-13 1995-10-18 Gen Electric Circuit breaker
US5793595A (en) * 1993-08-11 1998-08-11 Schweitzer Engineering Laboratories, Inc. Multi-application relay for power systems
US5877925A (en) * 1996-12-17 1999-03-02 General Electric Company Ground fault-rating plug for molded case circuit breakers

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5793595A (en) * 1993-08-11 1998-08-11 Schweitzer Engineering Laboratories, Inc. Multi-application relay for power systems
GB2288498A (en) * 1994-04-13 1995-10-18 Gen Electric Circuit breaker
US5877925A (en) * 1996-12-17 1999-03-02 General Electric Company Ground fault-rating plug for molded case circuit breakers

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2079091A1 (fr) * 2008-01-10 2009-07-15 Schneider Electric Industries SAS Boîtier de déclencheur électronique pour disjoncteur, dispositif de déclenchement électronique et procédé d'assemblage
FR2926392A1 (fr) * 2008-01-10 2009-07-17 Schneider Electric Ind Sas Boitier de declencheur electronique pour disjoncteur, dispositif de declenchement electronique et procede d'assemblage
JP2009170422A (ja) * 2008-01-10 2009-07-30 Schneider Electric Industries Sas 回路遮断器用の電子式トリップ装置のケース、電子式トリップ装置、およびその組立方法
US8358188B2 (en) 2008-01-10 2013-01-22 Schneider Electric Industries Sas Electronic trip device case for a circuit breaker, electronic trip device and assembly method thereof
RU2481664C2 (ru) * 2008-01-10 2013-05-10 Шнейдер Электрик Эндюстри Сас Корпус устройства электронного разъединителя для автоматического выключателя, устройство электронного разъединителя и способ его сборки
EP2202773A2 (fr) * 2008-12-24 2010-06-30 General Electric Company Calibreur configurable de champ utilisant un signal de communication et de contrôle
EP2202773A3 (fr) * 2008-12-24 2014-11-12 General Electric Company Calibreur configurable de champ utilisant un signal de communication et de contrôle
EP2202860A2 (fr) * 2008-12-29 2010-06-30 General Electric Company Calibreur universel pour unité de déclenchement électronique
EP2202860A3 (fr) * 2008-12-29 2012-09-05 General Electric Company Calibreur universel pour unité de déclenchement électronique

Also Published As

Publication number Publication date
HU0004986D0 (fr) 2001-02-28
HUP0004986A2 (hu) 2001-07-30
EP1113476A3 (fr) 2003-03-05
MXPA00012699A (es) 2003-04-25
HUP0004986A3 (en) 2003-05-28
PL344655A1 (en) 2001-07-02
CN1302074A (zh) 2001-07-04

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