GB1255795A - Earth leakage protection devices - Google Patents

Earth leakage protection devices

Info

Publication number
GB1255795A
GB1255795A GB5783768A GB5783768A GB1255795A GB 1255795 A GB1255795 A GB 1255795A GB 5783768 A GB5783768 A GB 5783768A GB 5783768 A GB5783768 A GB 5783768A GB 1255795 A GB1255795 A GB 1255795A
Authority
GB
United Kingdom
Prior art keywords
winding
windings
transformer
arrangement
earth leakage
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
GB5783768A
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.)
SERVODAN AS
Original Assignee
SERVODAN AS
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 SERVODAN AS filed Critical SERVODAN AS
Publication of GB1255795A publication Critical patent/GB1255795A/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
    • H02H3/33—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
    • H02H3/332—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 responsive to dc component in the fault current

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Breakers (AREA)
  • Relay Circuits (AREA)

Abstract

1,255,795. Protective systems. SERVODAN A.S. 5 Dec., 1968 [24 April, 1968], No. 57837/68. Heading H2K. An earth leakage protective arrangement comprises a circuit-breaker 6 having its tripping device 5 connected to the secondary winding 4 of a core-balance transformer 1, the device 5 being connected to an A.C. source through a first coupling including the secondary winding 4 and through a second coupling so arranged that they normally counterbalance each other, but when the sum of the currents in the primary windings differs from zero, the couplings are differently affected and the tripping device is energized. This arrangement enables response to be obtained when a D.C. earth leakage component exists on an A.C. supply, or when the arrangement is used as a D.C. earth leakage protective arrangement. As shown, the core-balance transformer 1 has an auxiliary winding 16 connected in series with the primary winding 17 of an auxiliary transformer to the supply conductors. The secondary windings 4 and 19 are connected in series to the device 5 in such a manner that the voltages induced in them from the windings 16, 17 cancel so the arrangement may function in the usual manner due to unbalance in the A.C. currents in the primary windings of the transformer 1 as well as to unbalanced D.C. currents in the primary windings altering the coupling between the windings 16, 4, resulting in the voltage induced in winding 19 predominating and causing tripping. In Fig. 6 (not shown) the transformers are combined, the windings 16, 17 being combined to form a common winding on the central limb of a three-limb transformer. In a further arrangement, Fig. 7 (not shown), only the corebalance transformer is used, the auxiliary winding and the secondary winding both being connected to an A.C. source.
GB5783768A 1968-04-24 1968-12-05 Earth leakage protection devices Expired GB1255795A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DK186268A DK146609C (en) 1968-04-24 1968-04-24 FAULT CURRENT RELAY

Publications (1)

Publication Number Publication Date
GB1255795A true GB1255795A (en) 1971-12-01

Family

ID=8108614

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5783768A Expired GB1255795A (en) 1968-04-24 1968-12-05 Earth leakage protection devices

Country Status (4)

Country Link
DE (1) DE1905505C3 (en)
DK (1) DK146609C (en)
FR (1) FR2009835A1 (en)
GB (1) GB1255795A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2247119A (en) * 1990-07-27 1992-02-19 Atomic Energy Authority Uk D C traction system earth fault protection
CN103368133A (en) * 2012-03-28 2013-10-23 施耐德电器工业公司 Earth leakage protection breaker capable of inter-phase line low current fault protection

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2555221C2 (en) * 1975-12-09 1984-10-25 Brown, Boveri & Cie Ag, 6800 Mannheim Procedure for the detection of residual currents of any kind
DE2555303C3 (en) * 1975-12-09 1982-03-04 Brown, Boveri & Cie Ag, 6800 Mannheim Residual current circuit arrangement
DE2555302C3 (en) * 1975-12-09 1982-02-25 Brown, Boveri & Cie Ag, 6800 Mannheim Residual current protection circuit
DE2602534A1 (en) * 1976-01-23 1977-07-28 Siemens Ag FAULT CURRENT CIRCUIT BREAKER
DE19534273A1 (en) * 1995-09-15 1997-03-20 Schupa Elektro Gmbh & Co Kg Protection device for surge arresters

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE567079C (en) * 1928-01-17 1933-01-03 H Smolinski Dr Ing Device for preventing the persistence of fault currents, for example in the event of earth faults in electrical systems
DE603108C (en) * 1929-10-29 1934-09-22 Siemens Schuckertwerke Akt Ges Protection circuit with a relay lying in series with an overcurrent release, which closes its contacts when the permissible current limit is exceeded or not reached
DE521553C (en) * 1929-12-21 1931-03-24 Aeg Current transformer for supplying tripping devices for overcurrent switches
DE1027297B (en) * 1953-10-24 1958-04-03 Licentia Gmbh Current and current direction-dependent protection arrangement for electrical systems
DE1146181B (en) * 1961-04-28 1963-03-28 Siemens Ag Residual current circuit breaker with summation current transformer and amplifier
DE1140275B (en) * 1961-05-12 1962-11-29 Vedder Gmbh Geb Residual current protection circuit
DK151524C (en) * 1984-02-23 1988-06-13 Nordischer Maschinenbau APPLICATION FOR OPENING THE BUGHOLE OF FISH

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2247119A (en) * 1990-07-27 1992-02-19 Atomic Energy Authority Uk D C traction system earth fault protection
GB2247119B (en) * 1990-07-27 1994-06-01 Atomic Energy Authority Uk Traction system earth fault protection
CN103368133A (en) * 2012-03-28 2013-10-23 施耐德电器工业公司 Earth leakage protection breaker capable of inter-phase line low current fault protection
CN103368133B (en) * 2012-03-28 2016-08-31 施耐德电器工业公司 There is the earth leakage circuit breaker of low current fault protection between phase line

Also Published As

Publication number Publication date
DE1905505B2 (en) 1973-01-11
DK146609C (en) 1984-04-30
FR2009835A1 (en) 1970-02-13
DE1905505C3 (en) 1982-04-22
DK146609B (en) 1983-11-14
DE1905505A1 (en) 1969-11-20

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