EP0948112A2 - Motor protector apparatus - Google Patents

Motor protector apparatus 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
secondary windings
transducers
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)
French (fr)
Other versions
EP0948112A3 (en
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/en
Publication of EP0948112A3 publication Critical patent/EP0948112A3/en
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.

Abstract

The motor protection arrangement has a first transducer (11-13) per phase and an electronic overload protection circuit connected to the secondary windings (14-16) of the first transducer. The secondary windings of the first transducer form the primary conductors of further transducers inside the electronic overload protection device. The further transducers and evaluation elements are housed in an overload relay housing inside the motor protection device.

Description

Die Erfindung betrifft eine Motorschutzeinrichtung nach dem Oberbegriff des Anspruches 1.The invention relates to a motor protection device according to the preamble of the claim 1.

Eine Motorschutzeinrichtung der eingangs genannten Art dient dazu, einen Motor gegen Überlast zu schützen und diesen in einem solchen Falle abzuschalten.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.

Es sind thermische Überlastrelais bekannt geworden, bei denen zur Überwachung des Stromes Thermobimetalle vorgesehen sind, die auf eine Entklinkungsstelle einwirken, um auf diese Weise einen Schalter auszuschalten.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.

Es ist ein elektronisches Motorschutzrelais bekannt geworden, bei dem in einem Gehäuse drei Wandler untergebracht sind, deren Primärwicklungen durch die Netzzuleitungen zum Motor gebildet sind; die Sekundärwicklungen sind einer Elektronik, die auf einer Platine aufgebracht ist und in der die Signale der Sekundärseite der Wandler ausgewertet werden zugeführt und damit verbunden. 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.

Aufgabe der Erfindung ist es, eine Motorschutzeinrichtung der eingangs genannten Art zu verbessern.The object of the invention is to provide a motor protection device of the type mentioned to improve.

Diese Aufgabe wird erfindungsgemäß durch die Merkmale des Anspruches 1 gelöst.This object is achieved by the features of claim 1.

Danach ist die elektronische Überlastschutzeinrichtung an die Sekundärwicklungen der ersten Wandler angeschlossen, wobei die Sekundärwicklungen mit den Primärwicklungen für die Überlastschutzeinrichtungswandler verbunden sind. Diese, auch als weitere Wandler bezeichneten Überlastschutzeinrichtungswandler sind zusammen mit Auswerteelementen in einem Überlastrelaisgehäuse untergebracht. Die elektronische Überlastschutzeinrichtung und die Wandler sind in einem Umgehäuse untergebracht, welches in einer besonderen Ausgestaltung zweischalig ist.Then 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.

Die Auswerteelemente dienen dazu, Überströme zu detektieren und ggf. ein Auslöserelais anzusteuern sowie die detektierten Werte der Auswertung einer Zentrale zuzuführen.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.

Die Bedienoberfläche der elektronischen Überlastschutzeinrichtung sowie daran angeordnete Hilfskontaktklemmen sind durch eine Ausnehmung im Gehäuse zugänglich, wobei gegebenenfalls die elektronische Überlastschutzeinrichtung mit der Bedienoberfläche und den Hilfskontaktklemmen aus dem Gehäuse herausragen.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.

Anhand der Zeichnung, in der ein Ausführungsbeispiel der Erfindung dargestellt ist, sollen die Erfindung, sowie weitere vorteilhafte Ausgestaltungen und Verbesserungen der Erfindung näher erläutert und beschrieben werden.Using the drawing, in which an embodiment of the invention is shown, the invention, as well as further advantageous refinements and improvements the invention are explained and described in more detail.

Es zeigen

Fig. 1
ein Schaltbild für eine erfindungsgemäße Motorschutzeinrichtung,
Fig. 2
eine Einsicht in die Motorschutzeinrichtung,
Fig. 3
eine konkrete Ausgestaltung in Seitenansicht, und
Fig. 4
eine Aufsicht auf die Anordnung gemäß Fig. 3.
Show it
Fig. 1
1 shows a circuit diagram for a motor protection device according to the invention,
Fig. 2
an insight into the motor protection device,
Fig. 3
a concrete design in side view, and
Fig. 4
3 shows a top view of the arrangement according to FIG. 3.

In einem Netz RST, welches eine Last 10 in Form eines Elektromotors versorgt, sind drei erste Wandler 11, 12 und 13 vorgesehen, wobei die Leiter R, S, T als Primärwicklungen der ersten Wandler 11, 12 und 13 dienen; die Sekundärwicklungen 14, 15 und 16 sind mit einem elektronischen Überlastrelais 17 verbunden (auch Überlastschutzeinrichtung genannt), in dem die in den Sekundärwicklungen 14, 15 und 16 entstehenden Signale ausgewertet werden. Mittels einer in dem Relais 17 befindlichen Schaltkontaktanordnung 18 wird eine Versorgungsleitung 19 geschlossen oder unterbrochen, mit der ein Elektromagnetsystem 20 eines Schützes mit Kontaktstellen 21, 22, 23 in den Netzleitern R, S, T angesteuert wird. Wenn beispielsweise in dem Leiter R ein Überstrom entsteht, dann wird dieses in der Sekundärwicklung zu einem Signal führen, welches die Schaltkontaktstelle 18 schließt, so daß das Elektromagnetsystem 20 anziehen und die Schalter 21 bis 23 ausschalten kann; umgekehrt könnte es natürlich auch sein, daß die geschlossene Schaltkontaktanordnung geöffnet wird, so daß der Strom durch die Leitung 19 abgeschaltet wird, so daß das Elektromagnetsystem abfällt und die Kontaktstellen 21 bis 23 öffnet.In 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. By means of 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. For example, if in the conductor R a Overcurrent occurs, then this will lead to a signal in the secondary winding, which closes the switching contact point 18 so that the electromagnetic system 20 attract and can turn off switches 21 to 23; vice versa it could of course also be that the closed switching contact arrangement is opened so that the Current through line 19 is turned off so that the electromagnetic system drops out and opens the contact points 21 to 23.

Das Relais 17 besitzt weiterhin eine Signalkontaktstelle 24, und über eine Leitung 25 wird der Schaltzustand der Hilfskontaktstelle 24 einer Auswerteeinrichtung übermittelt.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.

Die Fig. 2 zeigt die Anordnung gemäß Fig. 1 in einer schematischen konstruktiven Darstellung. Innerhalb eines Gehäuses 30 sind drei erste Wandler 31, 32 und 33 vorgesehen, deren Kerne 34, 35 und 36 durch lamellierte Bleche gebildet sind, die eine Öffnung 37, 38 und 39 aufweisen, durch die die als Schienen ausgebildeten Netzleiter R, S und T hindurchgeführt sind. Um einen der Schenkel 40, 41 und 42 ist je eine Wicklung 43, 44 und 45 herumgelegt, die als Sekundärwicklungen dienen.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.

In das Gehäuse 30 ist ein Überlastschutzgehäuse 46 eingesetzt, in dem weitere Wandler 47, 48, 49, auch Überlastwandler 47, 48 und 49 genannt, untergebracht sind; die Sekundärwicklungen 43, 44 und 45 sind an die Primärwicklungen für die weitere Wandler 47 bis 49 angeschlossen, deren Sekundärwicklungen 50, 51 und 52 einer Auswerteeinrichtung 53 zugeordnet bzw. zugeführt werden, die beispielsweise die Schaltkontaktanordnung 18 und die Schaltkontaktanordnung 24 öffnet oder schließt, so daß das Elektromagnetsystem 20 angesteuert oder der Schaltzustand einer Auswerteeinheit gemeldet werden.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.

Man erkennt in der Fig. 3 das Gehäuse 30 sowie das aus dem Gehäuse 30 herausragende Gehäuse 46 des Überlastrelais, die Wandler 31, 32 und 33 nebst den Leitern R, S und T. Die Sekundärwicklungen 40, 41 und 42 sind als starre Leiter ausgebildet und in das Überlastgehäuse 46 eingeführt.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.

Das Gehäuse 30 besteht aus zwei Gehäuseteilen 30 a und 30 b, wobei im Bereich der Trennfuge 30 c eine Öffnung 30 d vorgesehen ist, durch die das Gehäuse 46 der Überlastschutzeinrichtung herausragt. Die in Fig. 4 dem Betrachter zugewandte Fläche besitzt einen Bereich 46 a, der als Bedienoberfläche dient, und einen Bereich 46 b, durch den die Anschlußleitungen 19 bzw. 25 in die Überlastschutzeinrichtung eingeführt werden können.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.

An den Netzleitern R, S, T schließt ein Schütz 54 an, in dem das Elektromagnetsystem 20 sowie die Kontaktstellen 21, 22 und 23 sowie eventuelle weitere Komponenten untergebracht sind.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.

Mit der erfindungsgemäßen Anordnung kann ein marktgängiges elektronisches Überlastrelais auch bei Stromstärken von 100 A und mehr in den Netzleitern R, S, T angewendet werden, indem über die ersten Wandler 11, 12 und 13 die Nennspannung bzw. der Nennstrom in den Leitern R, S, T auf Werte heruntertransformiert wird, die von der elektronischen Überlasteinrichtung 17 mit den weiteren Wandlern 47, 48, 49 ausgewertet werden können.With the arrangement according to the invention, 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.

Die Kerne 34, 35 und 36 können als Ringkerne oder eckige Bandkerne ausgebildet sein. Die Wicklungen 43, 44 und 45 könnten auch aus je zwei in Serie miteinander verbundenen Teilwicklungen zusammengesetzt sein, die auch auf unterschiedlichen Schenkeln der Wandler 31, 32, 33 bzw. deren Kerne 34, 35 und 36 aufgewickelt bzw. aufgebracht sind.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.

Claims (2)

In einem Gehäuse befindliche Motorschutzeinrichtung mit je einem ersten Wandler für jede Phase und mit einer elektronischen Überlastschutzeinrichtung, dadurch gekennzeichnet, daß die elektronische Überlastschutzeinrichtung an die Sekundärwicklungen (43, 44, 45) der ersten Wandler (31, 32, 33) angeschlossen ist, daß innerhalb der elektronischen Überlastschutzeinrichtung weitere Wandler (47, 48, 49) vorgesehen sind, deren Primärwicklungen mit den Sekundärwicklungen (43, 44, 45) der ersten Wandler (31, 32, 33) verbunden sind, daß die weiteren Wandler (47, 48, 49) zusammen mit Auswerteelementen (50) in einem Überlastrelaisgehäuse untergebracht sind, und daß das Überlastrelaisgehäuse in das Gehäuse (30) der Motorschutzeinrichtung eingesetzt ist.Motor protection device located in a housing, each with a first converter for each phase and with an electronic overload protection device, characterized in that the electronic overload protection device is connected to the secondary windings (43, 44, 45) of the first converter (31, 32, 33) in that Further transducers (47, 48, 49) are provided within the electronic overload protection device, the primary windings of which are connected to the secondary windings (43, 44, 45) of the first transducers (31, 32, 33) such that the further transducers (47, 48, 49) are housed together with evaluation elements (50) in an overload relay housing, and that the overload relay housing is inserted into the housing (30) of the motor protection device. Motorschutzeinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Bedienoberfläche sowie daran angeordnete Hilfskontaktklemmen durch eine Ausnehmung im Gehäuse zugänglich sind.Motor protection device according to claim 1, characterized in that the User interface and auxiliary contact terminals arranged on it through a recess are accessible in the housing.
EP99100908A 1998-03-28 1999-01-20 Motor protector apparatus Ceased EP0948112A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19813888 1998-03-28
DE1998113888 DE19813888B4 (en) 1998-03-28 1998-03-28 Motor protection equipment

Publications (2)

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EP0948112A2 true EP0948112A2 (en) 1999-10-06
EP0948112A3 EP0948112A3 (en) 2000-09-13

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DE (1) DE19813888B4 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4209817A (en) * 1978-03-15 1980-06-24 Square D Company Circuit breaker having an electronic fault sensing and trip initiating unit
EP0559580A1 (en) * 1992-03-02 1993-09-08 Schneider Electric Sa Connecting block for middle voltage relays with current sensors

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2349207A1 (en) * 1976-04-21 1977-11-18 Unelec INTERCHANGEABLE TRIGGER FOR CIRCUIT BREAKER
US4890081A (en) * 1988-08-01 1989-12-26 Westinghouse Electric Corp. CT quick change assembly
US5345158A (en) * 1992-10-02 1994-09-06 General Electric Company Electrical distribution equipment with torque estimating capability

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4209817A (en) * 1978-03-15 1980-06-24 Square D Company Circuit breaker having an electronic fault sensing and trip initiating unit
EP0559580A1 (en) * 1992-03-02 1993-09-08 Schneider Electric Sa Connecting block for middle voltage relays with current sensors

Also Published As

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

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