EP 2145369 A4 20140122 - ZERO SEQUENCE CURRENT GENERATOR
Title (en)
ZERO SEQUENCE CURRENT GENERATOR
Title (de)
NULLSEQUENZSTROMGENERATOR
Title (fr)
GENERATEUR DE COURANT HOMOPOLAIRE
Publication
Application
Priority
RU 2007000213 W 20070428
Abstract (en)
[origin: WO2008133543A1] A facility for an identification of an earth-fault feeder in networks with an isolated neutral comprises filters of zero sequence currents, which are included in a circuit of each outgoing filter, and the filter of the zero sequence voltage, which is connected to busbars. A generator of zero sequence current is connected to busbars through a switch, which is controlled by means of control and operation module, which is connected to the zero sequence voltage filter and which accomplishes temporarily closing the above- mentioned switch, when zero sequence voltage exceeds its definite level. The control and operation module comprises a time delay and provides with an identification of one phase-to-ground fault with respect to the zero sequence. The zero sequence current generator comprises a reactor with three-phase non-saturable iron circuit and with windings, which are connected in star with a grounded neutral. To the control and operation module there is connected a drive in the form of series-connected selector and vacuum switching module with three vacuum switches.
IPC 8 full level
G01R 31/02 (2006.01); H02H 3/17 (2006.01); H02H 7/26 (2006.01)
CPC (source: EP)
H02H 3/17 (2013.01)
Citation (search report)
- [A] WO 2005038474 A1 20050428 - ABB OY [FI], et al
- See references of WO 2008133543A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 2008133543 A1 20081106; CN 101711447 A 20100519; EA 016235 B1 20120330; EA 200901464 A1 20100430; EP 2145369 A1 20100120; EP 2145369 A4 20140122
DOCDB simple family (application)
RU 2007000213 W 20070428; CN 200780052774 A 20070428; EA 200901464 A 20070428; EP 07834948 A 20070428