GB962658A - Safety means for protection against leakage currents - Google Patents
Safety means for protection against leakage currentsInfo
- Publication number
- GB962658A GB962658A GB33448/60A GB3344860A GB962658A GB 962658 A GB962658 A GB 962658A GB 33448/60 A GB33448/60 A GB 33448/60A GB 3344860 A GB3344860 A GB 3344860A GB 962658 A GB962658 A GB 962658A
- Authority
- GB
- United Kingdom
- Prior art keywords
- earth
- conductor
- switch
- winding
- leakage current
- 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
Links
- 238000004804 winding Methods 0.000 abstract 9
- 239000004020 conductor Substances 0.000 abstract 8
- 230000004907 flux Effects 0.000 abstract 3
- 230000007935 neutral effect Effects 0.000 abstract 3
- 230000001681 protective effect Effects 0.000 abstract 2
- 235000002779 Morchella esculenta Nutrition 0.000 abstract 1
- 240000002769 Morchella esculenta Species 0.000 abstract 1
- 230000002950 deficient Effects 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
- H01H83/14—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by imbalance of two or more currents or voltages, e.g. for differential protection
- H01H83/144—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by imbalance of two or more currents or voltages, e.g. for differential protection with differential transformer
-
- 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
- H02H3/167—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 combined with other earth-fault protective 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
- H02H3/26—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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
962,658. Protective arrangements. R. MOSER, and J. MOREL. Sept. 29, 1960 [Oct. 2, 1959], No. 33448/60. Heading H2K. An earth-leakage protective arrangement includes a core-balance transformer 5 having primary windings 6, 7 connected in series with the phase, neutral and earth conductors, the winding 7 in series with the earth conductor T having a number of turns different from that of the other windings 6. In operation, should a person touch the unearthed frame of an apparatus 3 which has become defective, a small leakage current, e.g. 40 mA., causes sufficient unbalance between the windings 6 for the secondary winding 8 of the transformer to energize the release coil 9 of a switch 12 which opens. Should earth leakage occur on an apparatus 2 to which the earth conductor is connected, then the leakage current produces a flux in the core of the transformer due to the unbalance between the windings 6 and an opposing flux due to the leakage current in the winding 7 and the switch is released when the resultant of these fluxes induces sufficient current in the winding 8. Hence a higher leakage current to earth through the earth conductor is permitted before release of the switch occurs than would be the case when the leakage current does not flow through the conductor T. A resistance 16 connected between the neutral conductor N and the earthing conductor T, permits current to flow to earth through the appropriate winding 6 should the potential of the neutral rise above that of earth and so cause the release of the switch. The resistance 16 is also effective to produce the release of the switch should the earth resistance of the conductor T become too high and an earth fault occur on the apparatus 2.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR806618A FR1246800A (en) | 1959-10-02 | 1959-10-02 | Safety switch for protection against electric leakage currents |
Publications (1)
Publication Number | Publication Date |
---|---|
GB962658A true GB962658A (en) | 1964-07-01 |
Family
ID=8719765
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB33448/60A Expired GB962658A (en) | 1959-10-02 | 1960-09-29 | Safety means for protection against leakage currents |
Country Status (8)
Country | Link |
---|---|
US (1) | US3214638A (en) |
BE (1) | BE595274A (en) |
CH (1) | CH366588A (en) |
DE (1) | DE1140634B (en) |
ES (1) | ES261758A1 (en) |
FR (1) | FR1246800A (en) |
GB (1) | GB962658A (en) |
NL (2) | NL110540C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0018502A1 (en) * | 1979-03-28 | 1980-11-12 | Holger Dr. Lueder | Process and installation for the homogeneous-radiation air conditioning of a space, closed on all sides, especially of a tepidarium |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3280375A (en) * | 1963-01-17 | 1966-10-18 | Ite Circuit Breaker Ltd | Tripping device |
AT258340B (en) * | 1963-05-31 | 1967-11-27 | Benno Palatini | Device for electrical heating of extensive coverings |
AT251631B (en) * | 1963-09-16 | 1967-01-10 | Herbert Dipl Ing Pferschy | Device for heating floor surfaces |
US3376477A (en) * | 1965-12-06 | 1968-04-02 | Hubbell Inc Harvey | Protective circuit |
US3374398A (en) * | 1966-01-07 | 1968-03-19 | Sanders Associates Inc | Magnetic circuit protective device |
AT259054B (en) * | 1966-01-25 | 1967-12-27 | Uninorm Anstalt | Residual current circuit breaker with additional overcurrent release |
US3407337A (en) * | 1966-11-15 | 1968-10-22 | Purex Corp Ltd | Leak detector for swimming pool lights and the like |
US3473091A (en) * | 1967-04-14 | 1969-10-14 | Hubbell Inc Harvey | Ground leakage differential protective apparatus |
US3506906A (en) * | 1967-12-18 | 1970-04-14 | Rucker Co | Ground fault circuit interrupter with inadvertent ground sensor |
US3753205A (en) * | 1971-06-07 | 1973-08-14 | Wiggins Inc E | Coupler device for tubing ends providing mechanical and electrical connections therewith |
US3864581A (en) * | 1973-01-22 | 1975-02-04 | Varahur Srinivas Satyanarayana | Shock prevention device |
FR2444359A1 (en) * | 1978-12-12 | 1980-07-11 | Barthelemy Louis | Power equipment circuit for electrocution protection - overcomes sensitivity problems by measuring imbalance between abnormal earth leakage currents, power input and power output currents |
FR2454198A2 (en) * | 1979-04-09 | 1980-11-07 | Osmond Max | Enhanced sensitivity earth leakage cut=out - has toroidal transformer with differential line and neutral windings |
US4707759A (en) * | 1985-02-27 | 1987-11-17 | Bodkin Lawrence E | Universal fault circuit interrupter |
WO2007133169A1 (en) * | 2006-05-12 | 2007-11-22 | Great Man Made River Co. For Reclamation And Construction | Description electro-ageeb electrical safety device |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1667655A (en) * | 1924-10-03 | 1928-04-24 | Reyrolle A & Co Ltd | Controlling or tripping apparatus for alternating-current electric circuits |
US1776130A (en) * | 1927-10-19 | 1930-09-16 | Gen Electric | Protection of electric circuits |
GB350751A (en) * | 1930-07-01 | 1931-06-18 | Paul Berger | Improvements in protective cut-out devices for electrical installations |
GB429503A (en) * | 1933-11-23 | 1935-05-23 | Reyrolle A & Co Ltd | Improvements in or relating to earthing arrangements for electric apparatus |
FR900437A (en) * | 1942-11-20 | 1945-06-28 | Hermes Patentverwertungs Gmbh | Contact protection for electrical devices |
GB648207A (en) * | 1948-12-16 | 1951-01-03 | British Insulated Callenders | Improvements in protective devices for electric circuits |
DE1053639B (en) * | 1956-08-13 | 1959-03-26 | August Stuke | Circuit arrangement for the protection of electrical systems |
-
0
- NL NL256426D patent/NL256426A/xx unknown
- NL NL110540D patent/NL110540C/xx active
-
1959
- 1959-10-02 FR FR806618A patent/FR1246800A/en not_active Expired
-
1960
- 1960-09-21 BE BE595274A patent/BE595274A/en unknown
- 1960-09-26 US US58427A patent/US3214638A/en not_active Expired - Lifetime
- 1960-09-28 DE DEM46684A patent/DE1140634B/en active Pending
- 1960-09-29 GB GB33448/60A patent/GB962658A/en not_active Expired
- 1960-09-29 ES ES0261758A patent/ES261758A1/en not_active Expired
- 1960-09-30 CH CH1106660A patent/CH366588A/en unknown
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0018502A1 (en) * | 1979-03-28 | 1980-11-12 | Holger Dr. Lueder | Process and installation for the homogeneous-radiation air conditioning of a space, closed on all sides, especially of a tepidarium |
Also Published As
Publication number | Publication date |
---|---|
US3214638A (en) | 1965-10-26 |
CH366588A (en) | 1963-01-15 |
ES261758A1 (en) | 1960-12-16 |
FR1246800A (en) | 1960-11-25 |
DE1140634B (en) | 1962-12-06 |
BE595274A (en) | 1961-01-16 |
NL256426A (en) | |
NL110540C (en) |
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