DE3410364A1 - Circuit arrangement for the protection of three-phase motors - Google Patents

Circuit arrangement for the protection of three-phase motors

Info

Publication number
DE3410364A1
DE3410364A1 DE19843410364 DE3410364A DE3410364A1 DE 3410364 A1 DE3410364 A1 DE 3410364A1 DE 19843410364 DE19843410364 DE 19843410364 DE 3410364 A DE3410364 A DE 3410364A DE 3410364 A1 DE3410364 A1 DE 3410364A1
Authority
DE
Germany
Prior art keywords
circuit arrangement
circuit
resistor
star
protection
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
DE19843410364
Other languages
German (de)
Other versions
DE3410364C2 (en
Inventor
Johann Dr. 8451 Poppenricht Hauer
Wilhelm 8450 Amberg Holzer
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Priority to DE19843410364 priority Critical patent/DE3410364A1/en
Priority to JP5625385A priority patent/JPS60213222A/en
Publication of DE3410364A1 publication Critical patent/DE3410364A1/en
Application granted granted Critical
Publication of DE3410364C2 publication Critical patent/DE3410364C2/de
Priority to JP4384293U priority patent/JPH079565Y2/en
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage

Landscapes

  • Emergency Protection Circuit Devices (AREA)
  • Motor And Converter Starters (AREA)

Abstract

The invention relates to a circuit arrangement for the protection of a three-phase motor (11), which can be switched by means of a vacuum contactor (4), against overvoltage. To this end, a star-connected circuit (12) is connected to the connecting terminals (8, 9, 10) of the three-phase motor (11) or to the terminals of the vacuum contactor on the load side, the star arms (13) of which star-connected circuit (12) consist of the series circuit of a resistor (14) and the parallel circuit of a resistor (15) with a capacitor (16) and a varistor (17). This results in a cost-effective and space-saving circuit arrangement since the load capacity properties of the capacitors can be considerably reduced. <IMAGE>

Description

Siemens Aktiengesellschaft Unser Zeichen Berlin und München VPA 84P 3 1 0 8 DESiemens Aktiengesellschaft Our symbol Berlin and Munich VPA 84P 3 1 0 8 DE

Schaltungsanordnung zum Schutz von DrehstrommotorenCircuit arrangement for the protection of three-phase motors

Die Erfindung bezieht sich auf eine Schaltungsanordnung zum Schutz von mit einem Vakuumschütz schaltbaren Drehstrommotoren gegen Überspannung unter Verwendung von einer an die Zuleitungen angeschlossenen Sternschaltung, deren Sternarme aus der Reihenschaltung von einem Widerstand mit der Parallelschaltung von Widerstand und Kondensator bestehen.The invention relates to a circuit arrangement for protecting three-phase motors that can be switched with a vacuum contactor against overvoltage using a star connection connected to the supply lines, their star arms from the series connection of a resistor with the parallel connection of resistor and capacitor exist.

Bei einer bekannten Schaltungsanordnung der obengenannten Art (Siemens-Betriebsanleitung für Bergbauschütz 3TL3, Seite 3, Fig. 3) sind zur Vermeidung der Überspannungen für die Kondensatoren relativ hohe zulässige Spitzenspannungswerte vorzusehen. In a known circuit arrangement of the type mentioned above (Siemens operating instructions for mining contactor 3TL3, Page 3, Fig. 3), relatively high permissible peak voltage values are to be provided for the capacitors to avoid overvoltages.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, eine Schaltungsanordnung der obengenannten Art zum Schutz gegen Überspannungen zu schaffen, die mit kostengünstigen Bauelementen aufbaubar ist. Dies wird bei einer Schaltungsanordnung der obengenannten Art dadurch erreicht, daß zu der Parallelschaltung ein nicht linearer Widerstand parallel geschaltet ist.The present invention is based on the object of a circuit arrangement of the type mentioned above for protection to create against overvoltages that can be built with inexpensive components. This is the case with a circuit arrangement of the type mentioned above achieved in that a non-linear resistance to the parallel connection is connected in parallel.

Besonders vorteilhaft ist es, wenn der nicht lineare Widerstand ein Varistor ist. Es ist an sich bekannt CDE-AS 20 23 8 72), zur Vermeidung von Überspannungen am Vakuumschalter einer Reihenschaltung von Vakuumschalter und Sättigungsdrossel die Reihenschaltung aus einem Hilfsschal· ter und einem Varistor parallel zu schalten. Diese An-Ordnung hat gegenüber der erfindungsgemäßen jedoch den Nachteil einer erhöhten Verlustleistung in der Sättigungsdrossel und einer voluminösen Baugröße für hohe Ströme. La 2 Syr / 14.03.1984It is particularly advantageous if the non-linear resistor is a varistor. It is known per se CDE-AS 20 23 8 72), to avoid overvoltages at the vacuum switch, a series connection of vacuum switch and Saturation choke to connect the series connection of an auxiliary switch and a varistor in parallel. This an-order However, compared to the invention, it has the disadvantage of increased power dissipation in the saturable reactor and a voluminous structural size for high currents. La 2 Syr / 03/14/1984

Anhand der Zeichnung wird eine Schaltungsanordnung gemäß der Erfindung beschrieben.A circuit arrangement according to the invention is described with reference to the drawing.

Der Motor 11 ist an die Phasen 1, 2 und 3 des Drehstromnetzes über die Anschlußklemmen 8, 9 und 10 des Motors 11 und den dreipoligen Vakuumschalter 4 und die Leitungen 5, 6 und 7 angeschlossen. An den Anschlußklemmen 8, 9, 10 des Motors 11 ist die Sternschaltung 12 angeschlossen. Die einzelnen Sternarme 13 bestehen aus der Reihenschaltung von Widerständen 14 mit der Parallelschaltung von Widerständen 15, Kondensatoren 16 und Varistoren 17.The motor 11 is connected to phases 1, 2 and 3 of the three-phase network via the terminals 8, 9 and 10 of the motor 11 and the three-pole vacuum switch 4 and the lines 5, 6 and 7 are connected. At the connection terminals 8, 9, 10 of the motor 11, the star connection 12 is connected. The individual star arms 13 consist of the series connection of resistors 14 with the parallel connection of resistors 15, capacitors 16 and varistors 17.

Die Verwendung der Varistoren 17 ermöglicht z.B. bei Auftreten gleich hoher Überspannungen gegenüber dem Stand der Technik eine Erniedrigung der Spitzenspannungswerte an den Kondensatoren und da folglich auch der Baugröße der Kondensatoren 16 um die Hälfte, so daß die Mehrkosten für die Varistoren 17 praktisch nicht ins Gewicht fallen. Durch die erfindungsgemäße Schaltungsanordnung ist somit eine kostengünstige und platzsparende Schaltungsanordnung zur Vermeidung von Überspannungen an Motoren, die durch Vakuumschütze geschaltet werden, erreicht worden.The use of the varistors 17 enables e.g. If overvoltages that are equally high compared to the prior art, a lowering of the peak voltage values on the capacitors and there consequently also the size of the capacitors 16 by half, so that the additional costs for the varistors 17 are practically negligible. By the circuit arrangement according to the invention is thus a cost-effective and space-saving circuit arrangement to avoid overvoltages on motors, which are switched by vacuum contactors has been achieved.

4 Patentansprüche
1 Figur4 claims
1 figure

- Leerseite -- blank page -

Claims (4)

PatentansprücheClaims ( 1. ^Schaltungsanordnung zum Schutz von mit einem Vakuumschütz schaltbaren Drehstrommotoren gegen Überspannung unter Verwendung von einer an die Zuleitungen angeschlossenen Sternschaltung, deren Sternarme aus der Reihenschaltung von einem Widerstand mit der Parallelschaltung von Widerstand und Kondensator bestehen, dadurch gekennzeichnet , daß zu der Parallelschaltung ein nicht linearer Widerstand (17) parallel geschaltet ist. ( 1. ^ Circuit arrangement for the protection of three-phase motors that can be switched with a vacuum contactor against overvoltage using a star connection connected to the supply lines, the star arms of which consist of the series connection of a resistor with the parallel connection of resistor and capacitor, characterized in that the parallel connection is a non-linear resistor (17) is connected in parallel. 2. Schaltungsanordnung nach Anspruch 1, dadurch gekennze ichnet , daß der nicht lineare2. Circuit arrangement according to claim 1, characterized in that the non-linear Widerstand ein Varistor (17) ist.Resistance is a varistor (17). 3. Schaltungsanordnung nach Anspruch 1, dadurch gekennzeichnet , daß die Beschaltung an der Lastseite des Vakuumschützes (4) angeschlossen ist.3. Circuit arrangement according to claim 1, characterized in that the circuit is on connected to the load side of the vacuum contactor (4). 4. Schaltungsanordnung nach Anspruch 3, dadurch gekennzeichnet , daß die Beschaltung integrierter Bestandteil des Vakuumschützes (4) ist.4. Circuit arrangement according to claim 3, characterized in that the circuitry is integrated Part of the vacuum contactor (4).
DE19843410364 1984-03-21 1984-03-21 Circuit arrangement for the protection of three-phase motors Granted DE3410364A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE19843410364 DE3410364A1 (en) 1984-03-21 1984-03-21 Circuit arrangement for the protection of three-phase motors
JP5625385A JPS60213222A (en) 1984-03-21 1985-03-20 Overvoltage protecting circuit device of 3-phase ac motor
JP4384293U JPH079565Y2 (en) 1984-03-21 1993-07-16 Overvoltage protection circuit device for three-phase AC motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19843410364 DE3410364A1 (en) 1984-03-21 1984-03-21 Circuit arrangement for the protection of three-phase motors

Publications (2)

Publication Number Publication Date
DE3410364A1 true DE3410364A1 (en) 1985-10-03
DE3410364C2 DE3410364C2 (en) 1992-10-08

Family

ID=6231188

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19843410364 Granted DE3410364A1 (en) 1984-03-21 1984-03-21 Circuit arrangement for the protection of three-phase motors

Country Status (2)

Country Link
JP (2) JPS60213222A (en)
DE (1) DE3410364A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4204559A1 (en) * 1992-02-13 1993-08-19 Slamecka Ernst Limitation of switching voltage on connecting inductive load e.g. compensation reactor coil in AC loop - connecting voltage limiter during high voltage periods and disconnecting during stationary operation of load

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19817231C1 (en) * 1998-04-17 1999-12-02 Siemens Ag Interference suppression module

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2023872B2 (en) * 1970-05-15 1973-07-12 ELECTRICAL SWITCHING DEVICE

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5379242A (en) * 1976-12-22 1978-07-13 Fuji Electric Co Ltd Enclosed-type housing equipment

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2023872B2 (en) * 1970-05-15 1973-07-12 ELECTRICAL SWITCHING DEVICE

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Siemens Betriebsanleitung für Bergbauschütz 3TL3, S.3, o.J. *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4204559A1 (en) * 1992-02-13 1993-08-19 Slamecka Ernst Limitation of switching voltage on connecting inductive load e.g. compensation reactor coil in AC loop - connecting voltage limiter during high voltage periods and disconnecting during stationary operation of load

Also Published As

Publication number Publication date
JPS60213222A (en) 1985-10-25
JPH079565Y2 (en) 1995-03-06
JPH0677441U (en) 1994-10-28
DE3410364C2 (en) 1992-10-08

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Legal Events

Date Code Title Description
8110 Request for examination paragraph 44
D2 Grant after examination
8364 No opposition during term of opposition
8320 Willingness to grant licences declared (paragraph 23)
8339 Ceased/non-payment of the annual fee