EP0948112A2 - Appareil de protection d'un moteur - Google Patents

Appareil de protection d'un moteur Download PDF

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Publication number
EP0948112A2
EP0948112A2 EP99100908A EP99100908A EP0948112A2 EP 0948112 A2 EP0948112 A2 EP 0948112A2 EP 99100908 A EP99100908 A EP 99100908A EP 99100908 A EP99100908 A EP 99100908A EP 0948112 A2 EP0948112 A2 EP 0948112A2
Authority
EP
European Patent Office
Prior art keywords
protection device
housing
overload
transducers
secondary windings
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.)
Ceased
Application number
EP99100908A
Other languages
German (de)
English (en)
Other versions
EP0948112A3 (fr
Inventor
Andreas Dipl.-Phys. Wilmers
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 Patent GmbH
Original Assignee
ABB Patent 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 ABB Patent GmbH filed Critical ABB Patent GmbH
Publication of EP0948112A2 publication Critical patent/EP0948112A2/fr
Publication of EP0948112A3 publication Critical patent/EP0948112A3/fr
Ceased 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
    • H01H71/125—Automatic release mechanisms with or without manual release using a solid-state trip unit characterised by sensing elements, e.g. current transformers

Definitions

  • the invention relates to a motor protection device according to the preamble of the claim 1.
  • a motor protection device of the type mentioned is used to counter an engine To protect overload and switch it off in such a case.
  • Thermal overload relays have become known in which for monitoring the Current bimetallic metals are provided, which act on a release point, to turn off a switch in this way.
  • An electronic motor protection relay has become known in which in a housing three converters are housed, their primary windings through the power supply lines are formed to the engine; the secondary windings are electronics that are on a circuit board is applied and in which the signals of the secondary side of the converter are evaluated and connected.
  • the object of the invention is to provide a motor protection device of the type mentioned to improve.
  • the electronic overload protection device is connected to the secondary windings first converter connected, the secondary windings with the primary windings for the overload protection device converter are connected.
  • This, as well as others Transducers called overload protection device converters are together with evaluation elements housed in an overload relay housing.
  • the electronic Overload protection device and the converter are housed in an outer casing, which, in a special embodiment, has two shells.
  • the evaluation elements are used to detect overcurrents and, if necessary, a trigger relay to control and feed the detected values to the evaluation of a control center.
  • the user interface of the electronic overload protection device and those arranged thereon Auxiliary contact terminals are accessible through a recess in the housing, where appropriate, the electronic overload protection device with the user interface and the auxiliary contact terminals protrude from the housing.
  • a network RST which supplies a load 10 in the form of an electric motor three first transducers 11, 12 and 13 are provided, the conductors R, S, T being primary windings serve the first transducers 11, 12 and 13; the secondary windings 14, 15 and 16 are connected to an electronic overload relay 17 (also overload protection device called), in which the resulting in the secondary windings 14, 15 and 16 Signals are evaluated.
  • an electronic overload relay 17 also overload protection device called
  • a switch contact arrangement located in the relay 17 18 a supply line 19 is closed or interrupted, with which an electromagnetic system 20 of a contactor with contact points 21, 22, 23 in the network conductors R, S, T is controlled.
  • the relay 17 also has a signal contact point 24, and via a line 25 the switching state of the auxiliary contact point 24 is transmitted to an evaluation device.
  • FIG. 2 shows the arrangement according to FIG. 1 in a schematic constructive illustration.
  • Three first transducers 31, 32 and 33 are provided within a housing 30, whose cores 34, 35 and 36 are formed by laminated sheets that have an opening 37, 38 and 39, through which the network conductors R, S and T are passed through.
  • Around one of the legs 40, 41 and 42 is a winding 43, 44 and 45 put around, which serve as secondary windings.
  • An overload protection housing 46 is inserted into the housing 30, in the other Converters 47, 48, 49, also called overload converters 47, 48 and 49, are housed; the secondary windings 43, 44 and 45 are on the primary windings for the further Converters 47 to 49 connected, the secondary windings 50, 51 and 52 one Evaluation device 53 are assigned or supplied, for example the Switch contact arrangement 18 and the switch contact arrangement 24 opens or closes, so that the electromagnetic system 20 is controlled or the switching state of an evaluation unit be reported.
  • FIG. 3 shows the housing 30 and that which protrudes from the housing 30 Overload relay housing 46, transducers 31, 32 and 33 together with conductors R, S and T.
  • the secondary windings 40, 41 and 42 are designed as rigid conductors and inserted into the overload housing 46.
  • the housing 30 consists of two housing parts 30 a and 30 b, in the area of Parting line 30 c an opening 30 d is provided through which the housing 46 of the Overload protection device protrudes.
  • the surface facing the viewer in FIG. 4 has an area 46 a, which serves as a user interface, and an area 46 b, through which the connecting lines 19 and 25 are inserted into the overload protection device can be.
  • a contactor 54 connects to the network conductors R, S, T in which the electromagnetic system 20 and the contact points 21, 22 and 23 and any other components are.
  • a commercially available electronic overload relay can also used for currents of 100 A and more in the R, S, T network conductors be by using the first converter 11, 12 and 13 the nominal voltage or the nominal current in the conductors R, S, T is transformed down to values which are different from the electronic overload device 17 evaluated with the further converters 47, 48, 49 can be.
  • the cores 34, 35 and 36 can be designed as ring cores or square band cores be.
  • the windings 43, 44 and 45 could also consist of two connected to each other in series Partial windings can be composed, also on different Legs of the transducers 31, 32, 33 or their cores 34, 35 and 36 wound or are upset.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Protection Of Generators And Motors (AREA)
EP99100908A 1998-03-28 1999-01-20 Appareil de protection d'un moteur Ceased EP0948112A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19813888 1998-03-28
DE1998113888 DE19813888B4 (de) 1998-03-28 1998-03-28 Motorschutzeinrichtung

Publications (2)

Publication Number Publication Date
EP0948112A2 true EP0948112A2 (fr) 1999-10-06
EP0948112A3 EP0948112A3 (fr) 2000-09-13

Family

ID=7862759

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99100908A Ceased EP0948112A3 (fr) 1998-03-28 1999-01-20 Appareil de protection d'un moteur

Country Status (2)

Country Link
EP (1) EP0948112A3 (fr)
DE (1) DE19813888B4 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29917174U1 (de) 1999-09-30 2000-01-13 Abb Patent Gmbh, 68309 Mannheim Elektronisches Überlastrelais

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2349207A1 (fr) * 1976-04-21 1977-11-18 Unelec Declencheur interchangeable pour disjoncteur
US4209817A (en) * 1978-03-15 1980-06-24 Square D Company Circuit breaker having an electronic fault sensing and trip initiating unit
US4890081A (en) * 1988-08-01 1989-12-26 Westinghouse Electric Corp. CT quick change assembly
FR2688099B1 (fr) * 1992-03-02 1994-04-15 Merlin Gerin Bloc de connexion d'un relais moyenne tension a des capteurs de courant.
US5345158A (en) * 1992-10-02 1994-09-06 General Electric Company Electrical distribution equipment with torque estimating capability

Also Published As

Publication number Publication date
EP0948112A3 (fr) 2000-09-13
DE19813888A1 (de) 1999-09-30
DE19813888B4 (de) 2007-07-05

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