FR2377106A1 - MOTOR PROTECTION AGAINST THERMAL OVERLOAD - Google Patents

MOTOR PROTECTION AGAINST THERMAL OVERLOAD

Info

Publication number
FR2377106A1
FR2377106A1 FR7800724A FR7800724A FR2377106A1 FR 2377106 A1 FR2377106 A1 FR 2377106A1 FR 7800724 A FR7800724 A FR 7800724A FR 7800724 A FR7800724 A FR 7800724A FR 2377106 A1 FR2377106 A1 FR 2377106A1
Authority
FR
France
Prior art keywords
motor protection
against thermal
thermal overload
switching relay
protection against
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.)
Pending
Application number
FR7800724A
Other languages
French (fr)
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of FR2377106A1 publication Critical patent/FR2377106A1/en
Pending 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
    • H02H5/04—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature
    • H02H5/042—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature using temperature dependent resistors

Landscapes

  • Protection Of Generators And Motors (AREA)
  • Thermally Actuated Switches (AREA)

Abstract

Montage de protection de moteur contre la surcharge thermique, comprenant un relais de commutation, un circuit de commande pour ce relais de commutation, ainsi qu'au moins un palpeur de température à conducteur à froid qui fait partie d'un diviseur de tension actionnant ce circuit de commande, celui-ci étant actionné et, par conséquent, le moteur étant débranché du relais de commutation, lorsqu'un rapport de division de tension déterminé est atteint Dans ce montage, un thermorupteur T ayant une température de commutation plus basse que le palpeur de température à conducteur à froid PTC est disposé de telle manière qu'il décale le rapport de division de tension dans le sens d'un verrouillage temporaire de l'état de coupure.Motor protection assembly against thermal overload, comprising a switching relay, a control circuit for this switching relay, as well as at least one cold conductor temperature probe which is part of a voltage divider actuating this control circuit, the latter being actuated and, therefore, the motor being disconnected from the switching relay, when a determined voltage division ratio is reached In this arrangement, a thermal switch T having a switching temperature lower than the PTC cold conductor temperature probe is arranged in such a way that it shifts the voltage dividing ratio in the direction of temporary locking of the cut-off state.

FR7800724A 1977-01-11 1978-01-11 MOTOR PROTECTION AGAINST THERMAL OVERLOAD Pending FR2377106A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19772700841 DE2700841A1 (en) 1977-01-11 1977-01-11 MOTOR PROTECTION CIRCUIT ARRANGEMENT

Publications (1)

Publication Number Publication Date
FR2377106A1 true FR2377106A1 (en) 1978-08-04

Family

ID=5998444

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7800724A Pending FR2377106A1 (en) 1977-01-11 1978-01-11 MOTOR PROTECTION AGAINST THERMAL OVERLOAD

Country Status (4)

Country Link
DE (1) DE2700841A1 (en)
FR (1) FR2377106A1 (en)
GB (1) GB1594036A (en)
IT (1) IT1089685B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2570820A1 (en) * 1984-09-21 1986-03-28 Provence Houilleres Device for detecting temperature variations
EP0176708A1 (en) * 1984-08-10 1986-04-09 Siemens Aktiengesellschaft Temperature protection circuit with hysteresis

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5797397A (en) * 1980-12-05 1982-06-17 Hitachi Ltd Driving device for variable speed motor
AT390673B (en) * 1985-12-05 1990-06-11 Oesterr Forsch Seibersdorf METHOD FOR CONTROLLING THE ROTOR SPEED FOR THICK FILM TREATMENT PLANTS AND ROTOR CONTROL
DE19540625B4 (en) * 1995-10-31 2004-11-18 Kriwan Industrie-Elektronik Gmbh Protection circuit and device for monitoring device and / or machine temperatures

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2096641A2 (en) * 1970-03-10 1972-02-25 Comp Generale Electricite

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2096641A2 (en) * 1970-03-10 1972-02-25 Comp Generale Electricite

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0176708A1 (en) * 1984-08-10 1986-04-09 Siemens Aktiengesellschaft Temperature protection circuit with hysteresis
FR2570820A1 (en) * 1984-09-21 1986-03-28 Provence Houilleres Device for detecting temperature variations

Also Published As

Publication number Publication date
DE2700841A1 (en) 1978-07-13
IT1089685B (en) 1985-06-18
GB1594036A (en) 1981-07-30

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