FR2374762A2 - Electronic insulation fault detection system - is for electrical machine and has self supervising circuit for detecting faults in protection circuit - Google Patents

Electronic insulation fault detection system - is for electrical machine and has self supervising circuit for detecting faults in protection circuit

Info

Publication number
FR2374762A2
FR2374762A2 FR7638428A FR7638428A FR2374762A2 FR 2374762 A2 FR2374762 A2 FR 2374762A2 FR 7638428 A FR7638428 A FR 7638428A FR 7638428 A FR7638428 A FR 7638428A FR 2374762 A2 FR2374762 A2 FR 2374762A2
Authority
FR
France
Prior art keywords
circuit
circuits
detection system
electrical machine
fault detection
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
FR7638428A
Other languages
French (fr)
Other versions
FR2374762B2 (en
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
Priority to FR7638428A priority Critical patent/FR2374762A2/en
Publication of FR2374762A2 publication Critical patent/FR2374762A2/en
Application granted granted Critical
Publication of FR2374762B2 publication Critical patent/FR2374762B2/fr
Granted legal-status Critical Current

Links

Classifications

    • 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
    • H02H3/02—Details
    • H02H3/05—Details with means for increasing reliability, e.g. redundancy arrangements
    • 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
    • H02H3/16—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 fault current to earth, frame or mass
    • H02H3/162—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 fault current to earth, frame or mass for ac systems
    • H02H3/165—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 fault current to earth, frame or mass for ac systems for three-phase systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)

Abstract

The insulation fault detection system has a supervisory circuit which permanently applies a continuous voltage to the terminals of a protection circuit. The supervisory circuit is connected by diode bridges (11) to the supply circuit of the machine to be protected. The systems power circuits, switching circuits and transistorised circuits are connected so as to form two independent parallel protection circuits (100, 200). They are connected to operate in opposite sense under the effect of a fault signal. Each of the protection circuits supervises the other. The protection circuits are connected to the electrical machine circuit, to the frame and to an earth connection by two independent connections. The terminals of these connections are separated from the supply circuit, the frame and earth by pairs of zener diodes (206, 204). The zener diodes (206, 204) have a determined trigger level.
FR7638428A 1976-12-14 1976-12-14 Electronic insulation fault detection system - is for electrical machine and has self supervising circuit for detecting faults in protection circuit Granted FR2374762A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7638428A FR2374762A2 (en) 1976-12-14 1976-12-14 Electronic insulation fault detection system - is for electrical machine and has self supervising circuit for detecting faults in protection circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7638428A FR2374762A2 (en) 1976-12-14 1976-12-14 Electronic insulation fault detection system - is for electrical machine and has self supervising circuit for detecting faults in protection circuit

Publications (2)

Publication Number Publication Date
FR2374762A2 true FR2374762A2 (en) 1978-07-13
FR2374762B2 FR2374762B2 (en) 1982-02-19

Family

ID=9181289

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7638428A Granted FR2374762A2 (en) 1976-12-14 1976-12-14 Electronic insulation fault detection system - is for electrical machine and has self supervising circuit for detecting faults in protection circuit

Country Status (1)

Country Link
FR (1) FR2374762A2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2415894A2 (en) * 1978-01-26 1979-08-24 Parrier Andre Earth line leakage current detector - has duplicated safety system with each circuit acting inversely to other circuit and using DC supply
FR2511204A1 (en) * 1981-03-23 1983-02-11 Pavlodarsk Ind I Phase difference protection for electric motor - compares series current converter phases to control motor disconnection block

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2415894A2 (en) * 1978-01-26 1979-08-24 Parrier Andre Earth line leakage current detector - has duplicated safety system with each circuit acting inversely to other circuit and using DC supply
FR2511204A1 (en) * 1981-03-23 1983-02-11 Pavlodarsk Ind I Phase difference protection for electric motor - compares series current converter phases to control motor disconnection block

Also Published As

Publication number Publication date
FR2374762B2 (en) 1982-02-19

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Legal Events

Date Code Title Description
CL Concession to grant licences
CL Concession to grant licences
GR Lien (pledge) cancelled due to a court decision