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GB1201877A - Earth leakage protection arrangements - Google Patents

Earth leakage protection arrangements

Info

Publication number
GB1201877A
GB1201877A GB6044768A GB6044768A GB1201877A GB 1201877 A GB1201877 A GB 1201877A GB 6044768 A GB6044768 A GB 6044768A GB 6044768 A GB6044768 A GB 6044768A GB 1201877 A GB1201877 A GB 1201877A
Authority
GB
United Kingdom
Prior art keywords
secondary winding
transformer
earth leakage
oscillator
transistor
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
Application number
GB6044768A
Inventor
Heinz Zimmermann
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.)
Landis and Gyr AG
Original Assignee
Landis and Gyr 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 Landis and Gyr AG filed Critical Landis and Gyr AG
Publication of GB1201877A publication Critical patent/GB1201877A/en
Expired 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
    • H02H3/34—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 of a three-phase system
    • H02H3/347—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 of a three-phase system using summation current transformers

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Dc-Dc Converters (AREA)

Abstract

1,201,877. Protective arrangements. LANDIS & CYR A.G. 19 Dec., 1968 [29 Dec., 1967], No. 60447/68. Heading H2K. An earth leakage protective arrangement comprises a differential transformer 6, and an oscillator the input of which is connected to the secondary winding 7 of the transformer 6 and the output of which is connected to a primary winding 19 of a transformer 20 having a secondary winding 27 connected by way of a rectifier 28 to a relay 16. When earth leakage occurs, the output from the secondary winding 7 stops the oscillator oscillating and the relay 16 releases. The oscillator includes a transistor 18 and a feedback winding 22 of the transformer 20 is connected to the base of the transistor or, as shown, to the emitter of the transistor. The arrangement may receive its power supply from a cell 37 through auxiliary contacts 36 which close before main contacts 35 of a switch arrangement 34 close. The secondary winding 7 of the differential transformer may be of resistance wire with the circuit constants such that open circuiting or short-circuiting of the secondary winding 7 stops the oscillator oscillating.
GB6044768A 1967-12-29 1968-12-19 Earth leakage protection arrangements Expired GB1201877A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1838667A CH460922A (en) 1967-12-29 1967-12-29 Detector device, in particular residual current circuit breaker

Publications (1)

Publication Number Publication Date
GB1201877A true GB1201877A (en) 1970-08-12

Family

ID=4432649

Family Applications (1)

Application Number Title Priority Date Filing Date
GB6044768A Expired GB1201877A (en) 1967-12-29 1968-12-19 Earth leakage protection arrangements

Country Status (6)

Country Link
AT (1) AT305421B (en)
CH (1) CH460922A (en)
DE (1) DE1638059C3 (en)
FR (1) FR1569741A (en)
GB (1) GB1201877A (en)
NL (1) NL6816846A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2244397A (en) * 1990-05-25 1991-11-27 Mk Electric Ltd Residual current protective device

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH607057A5 (en) * 1975-03-03 1978-11-30 Bbc Brown Boveri & Cie
DE2602534A1 (en) * 1976-01-23 1977-07-28 Siemens Ag FAULT CURRENT CIRCUIT BREAKER
DE2653453C3 (en) * 1976-11-25 1986-10-02 Felten & Guilleaume Energietechnik GmbH, 5000 Köln Circuit arrangement for an auxiliary voltage derived from the mains voltage via rectifier elements for multi-pole residual current circuit breakers
DE3412273A1 (en) * 1984-04-02 1985-10-10 Heinrich Kopp Gmbh & Co Kg, 8756 Kahl Line protection circuit breaker having a differential-current trip device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2244397A (en) * 1990-05-25 1991-11-27 Mk Electric Ltd Residual current protective device
GB2244397B (en) * 1990-05-25 1994-02-16 Mk Electric Ltd Electrical protection devices

Also Published As

Publication number Publication date
AT305421B (en) 1973-02-26
DE1638059B2 (en) 1972-07-13
FR1569741A (en) 1969-06-06
CH460922A (en) 1968-08-15
DE1638059C3 (en) 1974-07-25
NL6816846A (en) 1969-07-01
DE1638059A1 (en) 1971-03-11

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees