AU679574B2 - Differential current protective switch - Google Patents

Differential current protective switch

Info

Publication number
AU679574B2
AU679574B2 AU78836/94A AU7883694A AU679574B2 AU 679574 B2 AU679574 B2 AU 679574B2 AU 78836/94 A AU78836/94 A AU 78836/94A AU 7883694 A AU7883694 A AU 7883694A AU 679574 B2 AU679574 B2 AU 679574B2
Authority
AU
Australia
Prior art keywords
secondary winding
conductor
oscillator
relay
produced
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
AU78836/94A
Other versions
AU7883694A (en
Inventor
Hans-Jurgen Fleckenstein
Norbert Holscher
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.)
Heinrich Kopp GmbH and Co KG
Original Assignee
Heinrich Kopp GmbH and Co KG
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 Heinrich Kopp GmbH and Co KG filed Critical Heinrich Kopp GmbH and Co KG
Publication of AU7883694A publication Critical patent/AU7883694A/en
Application granted granted Critical
Publication of AU679574B2 publication Critical patent/AU679574B2/en
Anticipated expiration legal-status Critical
Ceased 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
    • H02H3/26—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
    • H02H3/335—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 the main function being self testing of the device

Abstract

A residual current device, in particular for insulation monitoring of electrical circuits, having a summing current transformer which has a secondary winding and a primary winding which is formed from a phase conductor and a neutral conductor. The secondary winding controls a relay (which acts on switching contacts) via an amplifier and a limiter circuit. An oscillator is provided between the limiter circuit and the relay and is connected to a voltage supply circuit such that a resistance is connected to the electrical mains power supply, which consists of a live conductor and a neutral conductor. A fault current is produced which flows continuously through the primary winding, as a result of which a low-frequency signal is produced in the secondary winding, which signal causes the oscillator to oscillate. <IMAGE>
AU78836/94A 1993-11-30 1994-11-16 Differential current protective switch Ceased AU679574B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4340737A DE4340737A1 (en) 1993-11-30 1993-11-30 Residual current circuit breaker
DE4340737 1993-11-30

Publications (2)

Publication Number Publication Date
AU7883694A AU7883694A (en) 1995-06-08
AU679574B2 true AU679574B2 (en) 1997-07-03

Family

ID=6503778

Family Applications (1)

Application Number Title Priority Date Filing Date
AU78836/94A Ceased AU679574B2 (en) 1993-11-30 1994-11-16 Differential current protective switch

Country Status (7)

Country Link
EP (1) EP0655820B1 (en)
AT (1) ATE152299T1 (en)
AU (1) AU679574B2 (en)
DE (2) DE4340737A1 (en)
FI (1) FI944860A (en)
NO (1) NO943983L (en)
NZ (1) NZ270016A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19618279A1 (en) 1996-05-07 1997-11-13 Kopp Heinrich Ag DI protection switch
DE19636975A1 (en) * 1996-09-12 1998-03-19 Turck Werner Kg Earth leakage circuit-breaker e.g. for protection of electrical equipment
DE19818054A1 (en) * 1998-04-22 1999-10-28 Siemens Ag Protective switching device especially difference current (DI) protective circuit-breaker
DE19938315A1 (en) * 1999-08-12 2001-03-15 Moeller Gmbh Current detection device
DE10120570A1 (en) * 2001-04-26 2002-11-21 Siemens Ag Error-voltage protection device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3786356A (en) * 1972-06-30 1974-01-15 Federal Pacific Electric Co Ground fault detector
US4833564A (en) * 1987-09-24 1989-05-23 Siemens Energy & Automation, Inc. Current sensing relay circuit with adjustable sensitivity and tracking test circuit
EP0220408B1 (en) * 1985-10-18 1990-03-07 Werner Turck GmbH & Co. KG Self-monitoring fault current breaker

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU855829A1 (en) * 1979-11-29 1981-08-15 Всесоюзный Научно-Исследовательский Институт Информации И Технико-Экономических Исследований В Электротехнике Device for protective disconnection of electric installation in electric network
SU1116490A1 (en) * 1983-02-21 1984-09-30 Всесоюзный Научно-Исследовательский И Проектно-Конструкторский Институт Механизированного И Ручного Строительно-Монтажного Инструмента,Вибраторов И Строительно-Отделочных Машин Device for protective de-energization of three-phase a.c.installation
GB2204198B (en) * 1987-03-09 1991-04-24 Qualcast Garden Prod Residual current circuit breakers
SU1444913A1 (en) * 1987-04-13 1988-12-15 Харьковское Высшее Военное Командно-Инженерное Училище Ракетных Войск Им.Маршала Советского Союза Крылова Н.И. Arrangement for protective disconnection in a.c. network
SU1735958A1 (en) * 1990-05-03 1992-05-23 Всесоюзный научно-исследовательский, проектно-конструкторский и технологический институт низковольтного аппаратостроения Leakage-current protective device for ac lines
DE4205208A1 (en) * 1992-02-20 1993-08-26 Siemens Ag Fault current protection switch

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3786356A (en) * 1972-06-30 1974-01-15 Federal Pacific Electric Co Ground fault detector
EP0220408B1 (en) * 1985-10-18 1990-03-07 Werner Turck GmbH & Co. KG Self-monitoring fault current breaker
US4833564A (en) * 1987-09-24 1989-05-23 Siemens Energy & Automation, Inc. Current sensing relay circuit with adjustable sensitivity and tracking test circuit

Also Published As

Publication number Publication date
FI944860A (en) 1995-05-31
AU7883694A (en) 1995-06-08
EP0655820A1 (en) 1995-05-31
NO943983L (en) 1995-05-31
ATE152299T1 (en) 1997-05-15
NZ270016A (en) 1996-12-20
DE4340737A1 (en) 1995-06-01
DE59402511D1 (en) 1997-05-28
FI944860A0 (en) 1994-10-14
NO943983D0 (en) 1994-10-20
EP0655820B1 (en) 1997-04-23

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Legal Events

Date Code Title Description
MK14 Patent ceased section 143(a) (annual fees not paid) or expired