DE9314411U1 - Overheating protection for electric motor windings - Google Patents

Overheating protection for electric motor windings

Info

Publication number
DE9314411U1
DE9314411U1 DE9314411U DE9314411U DE9314411U1 DE 9314411 U1 DE9314411 U1 DE 9314411U1 DE 9314411 U DE9314411 U DE 9314411U DE 9314411 U DE9314411 U DE 9314411U DE 9314411 U1 DE9314411 U1 DE 9314411U1
Authority
DE
Germany
Prior art keywords
electric motor
motor windings
winding
overheating protection
motor
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.)
Expired - Lifetime
Application number
DE9314411U
Other languages
German (de)
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.)
BAUKHAGE HANNS
Original Assignee
BAUKHAGE HANNS
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 BAUKHAGE HANNS filed Critical BAUKHAGE HANNS
Priority to DE9314411U priority Critical patent/DE9314411U1/en
Publication of DE9314411U1 publication Critical patent/DE9314411U1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
    • H02H7/085—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load
    • H02H7/0852—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load directly responsive to abnormal temperature by using a temperature sensor
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/26—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents
    • H02H3/32—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
    • H02H3/33—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors using summation current transformers
    • H02H3/334—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors using summation current transformers with means to produce an artificial unbalance for other protection or monitoring reasons or remote control

Landscapes

  • Protection Of Generators And Motors (AREA)

Description

Beschreibung: Description :

Schutz der Elektronotorwicklung vor Überhitzung mit Sensoren beiProtection of the electric motor winding against overheating with sensors at Miederspannungs-Drehstromxtotoren (typische MotornennspannungLow voltage three-phase motors (typical motor rated voltage

230/400V, 50/eOHz) ohne zusätzliche Sensorenleitung zur230/400V, 50/eOHz) without additional sensor cable for

SchaltanlageSwitchgear

Bei herkömmlichem Wicklungsschutz wird der Temperaturverlauf in der Wicklung durch das Auslösegerät nachgebildet (Überstromauslöser - Motorschutzschalter) oder eine zusätzliche Leitung (Verbindung) zwischen den in der Motorwicklung eingebrachten Sensoren (Kaltleiter-Bimetall) hergestellt.With conventional winding protection, the temperature curve in the winding is simulated by the triggering device (overcurrent release - motor protection switch) or an additional line (connection) is created between the sensors installed in the motor winding (PTC bimetal).

Der neue Motorschutz besteht im wesentlichen aus zwei Teilen:The new engine protection essentially consists of two parts:

Teil 1: In die Motorwicklung eingebrachte Temperatursensoren (parallelgeschaltete Bimetallschließer), die an einem Ende mit einer Zuleitungsphase verbunden sind und am anderen Ende über einen geeigneten Widerstand mit dem Motorgehäuse.Part 1: Temperature sensors (parallel-connected bimetallic switches) incorporated in the motor winding, which are connected at one end to a supply line phase and at the other end to the motor housing via a suitable resistor.

Als Berechnungsgrundlage für den Widerstand dient die Mindestspannung der Zuleitungsphase gegen Masse und die Auslösecharakteristik des 2. Teils (Fi-Schutzschalter, zB. Summenstromwandler). Die Bimetallschließer haben in geöffnetem Zustand in Abhängigkeit der Nennschalttemperatur je nach Erfordernissen der maximalen Motorspannung und der daraus resultierenden Prüfspannung eine Spannungsfestigkeit bis zu max. 4000V effektiv.The minimum voltage of the supply phase to ground and the tripping characteristics of the second part (residual current circuit breaker, e.g. total current transformer) serve as the basis for calculating the resistance. When open, the bimetal contacts have a dielectric strength of up to max. 4000V effective, depending on the nominal switching temperature and the requirements of the maximum motor voltage and the resulting test voltage.

Teil 2: Ein handelsüblicher Fi-Schutzschalter im Hauptstromkreis oder als Summenstromwandler mit Fehlerstromauslösung im Meldekreis, je nach Anforderung in 2- oder 4poliger Ausführung.Part 2: A commercially available residual current device in the main circuit or as a summation current transformer with residual current release in the signaling circuit, in 2- or 4-pole version depending on requirements.

Die Neuerung besteht im wesentlichen in der Einsparung der zusätzlichen Leitung, kombiniert mit den Vorteilen der Sensoren in der Wicklung.The innovation essentially consists in saving the additional cable, combined with the advantages of the sensors in the winding.

Wirtschaftlich besonders interessant ist die Neuerung bei Anlagen mit Frequenzumrichter, in denen auch eine Fehlerstromauslösung als Leitungsschutz, zusätzlicher Berührungsschutz der aktiven Fu-Teile, sowie das frühzeitige Erkennen von Isolationsfehlern in der Motorwicklung (zB. durch Feuchtigkeit) sinnvoll ist. Je nach Auswahl des Fi-Schutzschalters können auch mehrere Antriebe über einen Schalter überwacht werden.The innovation is particularly economically interesting for systems with frequency converters, in which residual current tripping as line protection, additional contact protection of the active frequency converter parts, as well as the early detection of insulation faults in the motor winding (e.g. due to moisture) is useful. Depending on the choice of residual current device, several drives can also be monitored via one switch.

Claims (1)

ScHut2anspruch:ScHut2claim: Temperatursensoren in der Motorwicklung zum Schutz vor Überhitzung, wobei bei Erreichen einer Grenztemperatur in der Wicklung eine der Zuleitungsphasen über einen Widerstand mit dem Motorgehäuse verbunden wird und der damit verursachte Fehlerstrom -Temperature sensors in the motor winding to protect against overheating, whereby when a limit temperature is reached in the winding, one of the supply phases is connected to the motor housing via a resistor and the resulting fault current - a) eine Abschaltung durch einen Fehlerstromschutzschalter bewirkt odera) causes a shutdown by a residual current device or b) eine Meldung an geeigneter Stelle durch einen Summenstromwandler bewirkt.b) a signal is given at a suitable location by a summation current transformer.
DE9314411U 1993-09-24 1993-09-24 Overheating protection for electric motor windings Expired - Lifetime DE9314411U1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE9314411U DE9314411U1 (en) 1993-09-24 1993-09-24 Overheating protection for electric motor windings

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE9314411U DE9314411U1 (en) 1993-09-24 1993-09-24 Overheating protection for electric motor windings

Publications (1)

Publication Number Publication Date
DE9314411U1 true DE9314411U1 (en) 1993-12-16

Family

ID=6898475

Family Applications (1)

Application Number Title Priority Date Filing Date
DE9314411U Expired - Lifetime DE9314411U1 (en) 1993-09-24 1993-09-24 Overheating protection for electric motor windings

Country Status (1)

Country Link
DE (1) DE9314411U1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10216595A1 (en) * 2002-04-15 2003-06-05 Siemens Ag Device for switching off temperature monitored load has protection device controlled by earth fault monitoring device and connected in electric current supply line
EP1983631A1 (en) * 2007-04-20 2008-10-22 Consul Werkstattausrüstung GmbH Electrical circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10216595A1 (en) * 2002-04-15 2003-06-05 Siemens Ag Device for switching off temperature monitored load has protection device controlled by earth fault monitoring device and connected in electric current supply line
EP1983631A1 (en) * 2007-04-20 2008-10-22 Consul Werkstattausrüstung GmbH Electrical circuit

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