Global Patent Index - EP 0917169 A3

EP 0917169 A3 2000-03-08 - Method for monitoring a tap changer

Title (en)

Method for monitoring a tap changer

Title (de)

Verfahren zur Überwachung eines Stufenschalters

Title (fr)

Procédé de surveillance d'un sélecteur de prises

Publication

EP 0917169 A3 (DE)

Application

EP 98116787 A

Priority

DE 19744465 A

Abstract (en)

[origin: DE19744465C1] Control of a multi-contact switch is achieved by measurement of the effective values of current and voltage, which are then used to determine the torque of a drive axle, which leads from the motor to the contact switch. Further steps permit comparison of measured and design torques and from comparisons prediction of a trend towards severe differences which can be used to shut off the motor.

IPC 1-7 (main, further and additional classification)

H01H 9/00

IPC 8 full level (invention and additional information)

H02P 13/06 (2006.01); G05F 1/147 (2006.01); H01H 9/00 (2006.01); H02J 13/00 (2006.01); H01H 1/00 (2006.01)

CPC (invention and additional information)

H01H 9/0005 (2013.01); H01H 1/0015 (2013.01); H01H 2009/0061 (2013.01)

Citation (search report)

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

DE 19744465 C1 19990311; AT 251794 T 20031015; BG 102768 A 19990430; BG 63480 B1 20020228; BR 9803833 A 19991228; CA 2249975 A1 19990408; CA 2249975 C 20070109; CN 1155027 C 20040623; CN 1215215 A 19990428; CZ 9803233 A3 19990414; DK 0917169 T3 20040216; EP 0917169 A2 19990519; EP 0917169 A3 20000308; EP 0917169 B1 20031008; ES 2203861 T3 20040416; HK 1021068 A1 20040206; HU 223544 B1 20040928; HU 9802216 A2 19990528; HU 9802216 A3 20010129; HU 9802216 D0 19981228; JP H11191998 A 19990713; RU 2209500 C2 20030727; US 6124726 A 20000926

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