NO20051268L - Method and device for fault current monitoring in an electric AC network - Google Patents
Method and device for fault current monitoring in an electric AC networkInfo
- Publication number
- NO20051268L NO20051268L NO20051268A NO20051268A NO20051268L NO 20051268 L NO20051268 L NO 20051268L NO 20051268 A NO20051268 A NO 20051268A NO 20051268 A NO20051268 A NO 20051268A NO 20051268 L NO20051268 L NO 20051268L
- Authority
- NO
- Norway
- Prior art keywords
- current values
- electric
- blocks
- network
- fault current
- Prior art date
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
Abstract
The invention relates to a method for monitoring fault currents in an electric AC mains having a predetermined mains frequency. According to the invention, current values of electric currents to be monitored are recorded (12a 12d), after which the recorded current values are converted into digitized current values (14). Afterwards, these digitized current values are used to calculate (16) cumulative current values, from which blocks comprised of the cumulative current values are formed (18) according to the phase position of a mains voltage signal. The blocks are then split (24) into spectral components. The spectral components of the blocks are then monitored (36) with regard to an exceeding of spectral limit values in order to evaluate the danger of the fault current.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10237342A DE10237342B4 (en) | 2002-08-14 | 2002-08-14 | Method and device for monitoring residual current in an electrical AC network |
PCT/EP2003/009037 WO2004017483A1 (en) | 2002-08-14 | 2003-08-14 | Method and device for monitoring fault currents in an electric ac mains |
Publications (2)
Publication Number | Publication Date |
---|---|
NO20051268L true NO20051268L (en) | 2005-03-11 |
NO334166B1 NO334166B1 (en) | 2013-12-23 |
Family
ID=31197025
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NO20051268A NO334166B1 (en) | 2002-08-14 | 2005-03-11 | Method and device for fault current monitoring in an electric AC network |
Country Status (8)
Country | Link |
---|---|
EP (1) | EP1479148B1 (en) |
AT (1) | ATE308148T1 (en) |
AU (1) | AU2003251708A1 (en) |
DE (2) | DE10237342B4 (en) |
DK (1) | DK1479148T3 (en) |
ES (1) | ES2251703T3 (en) |
NO (1) | NO334166B1 (en) |
WO (1) | WO2004017483A1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005028881B4 (en) * | 2005-06-22 | 2010-04-29 | Siemens Ag | Fault current analyzer for detecting a fault current and device with fault current detection function |
GB0614125D0 (en) * | 2006-07-15 | 2006-08-23 | Deepstream Technologies Ltd | Method and apparatus of detecting and compensating for DC residual fault currents on electrical systems |
DE102011107721B4 (en) | 2011-07-14 | 2014-02-13 | Ean Elektroschaltanlagen Gmbh | Method and device for measuring electrical currents using a current transformer |
EP2568557B1 (en) | 2011-09-07 | 2014-02-26 | Siemens Aktiengesellschaft | Method of operating a residual current circuit breaker and residual current circuit breaker for a frequency converter |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE459706B (en) * | 1987-11-12 | 1989-07-24 | Asea Ab | LAENGSDIFFERENTIALSKYDD |
GB2231216B (en) * | 1989-04-05 | 1993-04-14 | Mitsubishi Electric Corp | Zero-phase sequence current detector |
US5075619A (en) * | 1990-04-06 | 1991-12-24 | Tektronix, Inc. | Method and apparatus for measuring the frequency of a spectral line |
DE19634438A1 (en) * | 1996-08-26 | 1998-03-05 | Siemens Ag | Fault current or differential current (FI/DI) protection and G-type monitoring devices for dangerous shock currents |
DE59807747D1 (en) * | 1997-06-17 | 2003-05-08 | Walther Bender Gmbh & Co Kg Di | METHOD AND DEVICE FOR MONITORING INSULATION AND FAULT CURRENT IN AN ELECTRIC AC SYSTEM |
US6658360B1 (en) * | 2000-06-09 | 2003-12-02 | Siemens Aktiengesellschaft | Software-controlled evaluation of fault currents for protection and monitoring systems |
AT412047B (en) * | 2002-05-27 | 2004-08-26 | Moeller Gebaeudeautomation Kg | FAULT CIRCUIT BREAKER |
-
2002
- 2002-08-14 DE DE10237342A patent/DE10237342B4/en not_active Expired - Fee Related
-
2003
- 2003-08-14 ES ES03787796T patent/ES2251703T3/en not_active Expired - Lifetime
- 2003-08-14 DE DE50301495T patent/DE50301495D1/en not_active Expired - Lifetime
- 2003-08-14 AT AT03787796T patent/ATE308148T1/en active
- 2003-08-14 EP EP03787796A patent/EP1479148B1/en not_active Expired - Lifetime
- 2003-08-14 AU AU2003251708A patent/AU2003251708A1/en not_active Abandoned
- 2003-08-14 DK DK03787796T patent/DK1479148T3/en active
- 2003-08-14 WO PCT/EP2003/009037 patent/WO2004017483A1/en not_active Application Discontinuation
-
2005
- 2005-03-11 NO NO20051268A patent/NO334166B1/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
ES2251703T3 (en) | 2006-05-01 |
WO2004017483A1 (en) | 2004-02-26 |
NO334166B1 (en) | 2013-12-23 |
AU2003251708A1 (en) | 2004-03-03 |
DE10237342B4 (en) | 2004-07-29 |
EP1479148B1 (en) | 2005-10-26 |
DE10237342A1 (en) | 2004-03-04 |
DK1479148T3 (en) | 2006-03-13 |
EP1479148A1 (en) | 2004-11-24 |
ATE308148T1 (en) | 2005-11-15 |
DE50301495D1 (en) | 2005-12-01 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
MM1K | Lapsed by not paying the annual fees |