EP 0806781 B1 20020911 - A circuit for the protected supply of an electrical load
Title (en)
A circuit for the protected supply of an electrical load
Title (de)
Schaltung zur geschützten Versorgung einer elektrischen Last
Title (fr)
Circuit pour l'alimentation protégée d'une charge électrique
Publication
Application
Priority
FR 9605956 A 19960510
Abstract (en)
[origin: EP0806781A1] The load (M) may be a single-phase or polyphase motor fed from a three-phase network (U,V,W) via an electromechanical switch (20) and an inverse-parallel thyristor switch (30) operated by a controller (40), which energises the coil (53) of a shunt contactor (50) connected in series with a resistor or transformer (60) across the thyristor switch. The resistor or transformer establishes a DC voltage (V) across the thyristor switch when the contactor is closed. Its impedance is chosen such that the thyristor switch is rendered conductive when an overcurrent appears and closes the shunt.
IPC 1-7
IPC 8 full level
H01H 9/54 (2006.01); H01H 73/00 (2006.01); H02H 9/00 (2006.01); H01H 89/06 (2006.01)
CPC (source: EP US)
H01H 9/542 (2013.01 - EP US); H01H 9/548 (2013.01 - EP US); H01H 89/06 (2013.01 - EP US)
Designated contracting state (EPC)
DE IT SE
DOCDB simple family (publication)
EP 0806781 A1 19971112; EP 0806781 B1 20020911; AU 2009897 A 19971113; AU 716799 B2 20000309; BR 9703106 A 19980630; CZ 142397 A3 19981216; CZ 293753 B6 20040714; DE 69715296 D1 20021017; DE 69715296 T2 20030612; FR 2748612 A1 19971114; FR 2748612 B1 19980619; TW 463440 B 20011111; US 5953189 A 19990914; ZA 973974 B 19971202
DOCDB simple family (application)
EP 97400951 A 19970428; AU 2009897 A 19970508; BR 9703106 A 19970509; CZ 142397 A 19970509; DE 69715296 T 19970428; FR 9605956 A 19960510; TW 86107571 A 19970530; US 85416497 A 19970509; ZA 973974 A 19970508