CA1083672A - Ground fault detector - Google Patents
Ground fault detectorInfo
- Publication number
- CA1083672A CA1083672A CA282,282A CA282282A CA1083672A CA 1083672 A CA1083672 A CA 1083672A CA 282282 A CA282282 A CA 282282A CA 1083672 A CA1083672 A CA 1083672A
- Authority
- CA
- Canada
- Prior art keywords
- signal
- ground fault
- output circuit
- cycles
- sensing coil
- 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
- 230000035945 sensitivity Effects 0.000 claims abstract description 24
- 239000004020 conductor Substances 0.000 claims description 56
- 230000001360 synchronised effect Effects 0.000 claims description 41
- 238000001914 filtration Methods 0.000 claims description 10
- 238000004804 winding Methods 0.000 claims description 8
- 230000010355 oscillation Effects 0.000 claims description 7
- 230000008878 coupling Effects 0.000 claims 9
- 238000010168 coupling process Methods 0.000 claims 9
- 238000005859 coupling reaction Methods 0.000 claims 9
- 230000001747 exhibiting effect Effects 0.000 claims 9
- 238000001514 detection method Methods 0.000 description 11
- 230000007935 neutral effect Effects 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 5
- 239000003990 capacitor Substances 0.000 description 5
- 238000009826 distribution Methods 0.000 description 2
- 230000005669 field effect Effects 0.000 description 2
- 229920000136 polysorbate Polymers 0.000 description 2
- YVPYQUNUQOZFHG-UHFFFAOYSA-N amidotrizoic acid Chemical compound CC(=O)NC1=C(I)C(NC(C)=O)=C(I)C(C(O)=O)=C1I YVPYQUNUQOZFHG-UHFFFAOYSA-N 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- VMXUWOKSQNHOCA-UKTHLTGXSA-N ranitidine Chemical compound [O-][N+](=O)\C=C(/NC)NCCSCC1=CC=C(CN(C)C)O1 VMXUWOKSQNHOCA-UKTHLTGXSA-N 0.000 description 1
- 230000000306 recurrent effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/145—Indicating the presence of current or voltage
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/52—Testing for short-circuits, leakage current or ground faults
-
- 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
- H02H3/337—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 avoiding disconnection due to reactive fault currents
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Emergency Protection Circuit Devices (AREA)
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BE354543D BE354543A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1977-07-07 | ||
| US229469A US1895143A (en) | 1977-07-07 | 1927-10-28 | Incandescent lamp |
| FR660796D FR660796A (fr) | 1977-07-07 | 1928-09-21 | Perfectionnement aux lampes à incandescence |
| GB27533/28A GB298077A (en) | 1977-07-07 | 1928-09-25 | Improvements in or relating to electric incandescent lamps |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US704,323 | 1976-07-12 | ||
| US05/704,323 US4080641A (en) | 1976-07-12 | 1976-07-12 | Ground fault detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1083672A true CA1083672A (en) | 1980-08-12 |
Family
ID=24828999
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA282,282A Expired CA1083672A (en) | 1976-07-12 | 1977-07-07 | Ground fault detector |
Country Status (6)
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2538179B1 (fr) * | 1982-12-21 | 1985-10-04 | Merlin Gerin | Declencheur differentiel residuel a detection de variation d'etat |
| US4520417A (en) * | 1983-02-14 | 1985-05-28 | Raychem Corporation | Electrical monitoring systems |
| GB8324442D0 (en) * | 1983-09-13 | 1983-10-12 | Matburn Holdings Ltd | Electrosurgical system |
| IE56011B1 (en) * | 1985-01-29 | 1991-03-13 | Atreus Enterprises Limited | Improved residual current device |
| GB8512133D0 (en) * | 1985-05-14 | 1985-06-19 | Dorman Smith Switchgear Ltd | Residual current detector |
| US4809123A (en) * | 1986-04-14 | 1989-02-28 | Isco, Inc. | Ground fault detector for high-voltage DC power supplies |
| GB2251741A (en) * | 1991-01-09 | 1992-07-15 | Wellong Trading Ltd | Rapid response ground fault circuit interrupter |
| GB2258095B (en) * | 1991-07-26 | 1995-02-08 | Paul Victor Brennan | Residual current device |
| CN109725229B (zh) * | 2019-01-04 | 2023-09-29 | 中国南方电网有限责任公司超高压输电公司梧州局 | 一种区分电容性与电阻性瞬时接地故障支路的检测装置及方法 |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3787709A (en) * | 1971-12-13 | 1974-01-22 | Sci Systems Inc | Ground fault-sensitive detector and circuit breaker device |
| US3852642A (en) * | 1972-11-01 | 1974-12-03 | Westinghouse Electric Corp | Sensing amplifier and trip circuit particularly for ground fault circuit interrupter |
| US3953767A (en) * | 1974-04-15 | 1976-04-27 | Rca Corporation | Ground fault detection apparatus |
| US3963963A (en) * | 1975-04-22 | 1976-06-15 | Rca Corporation | Ground-fault detection system |
-
1976
- 1976-07-12 US US05/704,323 patent/US4080641A/en not_active Expired - Lifetime
-
1977
- 1977-07-07 CA CA282,282A patent/CA1083672A/en not_active Expired
- 1977-07-08 JP JP8248277A patent/JPS5310040A/ja active Granted
- 1977-07-11 GB GB29058/77A patent/GB1585783A/en not_active Expired
- 1977-07-12 FR FR7721548A patent/FR2358663A1/fr active Granted
- 1977-07-12 DE DE2731453A patent/DE2731453C3/de not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE2731453B2 (de) | 1979-06-13 |
| FR2358663B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1982-01-08 |
| GB1585783A (en) | 1981-03-11 |
| JPS5310040A (en) | 1978-01-30 |
| DE2731453A1 (de) | 1978-02-09 |
| US4080641A (en) | 1978-03-21 |
| JPS5736816B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1982-08-06 |
| FR2358663A1 (fr) | 1978-02-10 |
| DE2731453C3 (de) | 1980-02-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA1063224A (en) | Ground fault circuit interrupter utilizing a single transformer | |
| US4150411A (en) | Ground fault circuit interrupter utilizing a single transformer | |
| US4280162A (en) | Ground fault circuit interrupter | |
| CA2202738C (en) | Apparatus for detecting and responding to series arcs in ac electrical systems | |
| US4034269A (en) | Protective relay circuits | |
| US4216515A (en) | Ground fault interrupter | |
| US3754221A (en) | Ground fault detector and method of ground fault detection | |
| US3700967A (en) | Ground fault detector circuit | |
| US3891895A (en) | Ground fault detection | |
| US3852642A (en) | Sensing amplifier and trip circuit particularly for ground fault circuit interrupter | |
| US4180841A (en) | Ground fault circuit interrupter with grounded neutral protection | |
| CA1083672A (en) | Ground fault detector | |
| SE7713411L (sv) | Releskydd med funktionsverdesomkoppling | |
| US3974446A (en) | Polyphase fault current flow detecting and resetting means | |
| US3895263A (en) | Grounded neutral detector drive circuit for two pole ground fault interrupter | |
| GB2258095A (en) | Residual current device | |
| US3857069A (en) | Ground fault circuit interrupter and module therefor | |
| US3963963A (en) | Ground-fault detection system | |
| JPS58133037A (ja) | 電力スイツチ回路 | |
| US3723814A (en) | Phase-sensitive ground fault protective systems | |
| US3838314A (en) | Detector for reverse and open phase in a three phase circuit | |
| US3633071A (en) | Differential protective circuit | |
| US4045822A (en) | Ground fault interrupter apparatus | |
| US4091431A (en) | Ground leakage relay circuit | |
| WO1991019340A1 (en) | Electrical protection devices |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |