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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 network

Info

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
Application number
NO20051268A
Other languages
Norwegian (no)
Other versions
NO334166B1 (en
Inventor
Hans-Peter Hohe
Josef Sauerer
Original Assignee
Fraunhofer Ges Forschung
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 Fraunhofer Ges Forschung filed Critical Fraunhofer Ges Forschung
Publication of NO20051268L publication Critical patent/NO20051268L/en
Publication of NO334166B1 publication Critical patent/NO334166B1/en

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

Landscapes

  • Emergency Protection Circuit Devices (AREA)
  • Remote Monitoring And Control Of Power-Distribution Networks (AREA)
  • Locating Faults (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
  • Measurement Of Current Or Voltage (AREA)

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.
NO20051268A 2002-08-14 2005-03-11 Method and device for fault current monitoring in an electric AC network NO334166B1 (en)

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 (5)

* Cited by examiner, † Cited by third party
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
DE102023133033A1 (en) 2023-11-27 2025-05-28 Doepke Schaltgeräte GmbH Device and method for differential current monitoring

Family Cites Families (7)

* Cited by examiner, † Cited by third party
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
EP0990292B1 (en) * 1997-06-17 2003-04-02 Dipl.-Ing. Walther Bender GmbH & Co. KG Method and device for monitoring insulation and fault current in an electrical alternating current network
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

Also Published As

Publication number Publication date
DK1479148T3 (en) 2006-03-13
AU2003251708A1 (en) 2004-03-03
DE10237342A1 (en) 2004-03-04
ES2251703T3 (en) 2006-05-01
EP1479148B1 (en) 2005-10-26
ATE308148T1 (en) 2005-11-15
EP1479148A1 (en) 2004-11-24
DE50301495D1 (en) 2005-12-01
WO2004017483A1 (en) 2004-02-26
NO334166B1 (en) 2013-12-23
DE10237342B4 (en) 2004-07-29

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