EP 0771518 A1 19970507 - ELECTRICAL POWER CONTROL SYSTEM
Title (en)
ELECTRICAL POWER CONTROL SYSTEM
Title (de)
LEISTUNGSSTEUERUNGSSYSTEM
Title (fr)
SYSTEME DE REGULATION D'ALIMENTATION ELECTRIQUE
Publication
Application
Priority
- GB 9501729 W 19950720
- GB 9414665 A 19940720
- GB 9504282 A 19950303
Abstract (en)
[origin: WO9603018A1] The present invention relates to an electrical power control circuit for loads such as fluorescent lighting systems. A winding (3) has a positive end (13) connected to a positive rail (1) and is tapped at a predetermined position (18) for supplying an output terminal (T) with a selected voltage. A first relay contact (200A) can electrically connect a neutral end (14) of the winding to a neutral rail (2) to provide one selected voltage or a second relay contact (100A) can electrically short-circuit a predetermined number of turns of the winding in response to a request for a second selected voltage. When a fault condition is monitored, a third relay contact (300A) can electrically short-circuit the neutral end (14) of the winding to said predetermined position (18) to put the system into a failsafe condition which prevents turns of the winding being open circuit.
IPC 1-7
IPC 8 full level
H05B 37/02 (2006.01); G05F 1/14 (2006.01); H01F 29/02 (2006.01); H05B 41/16 (2006.01); H05B 41/40 (2006.01)
CPC (source: EP)
G05F 1/14 (2013.01); H05B 41/40 (2013.01)
Citation (search report)
See references of WO 9603018A1
Designated contracting state (EPC)
AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
WO 9603018 A1 19960201; AT E176118 T1 19990215; AU 2988495 A 19960216; AU 700796 B2 19990114; BR 9508791 A 19971230; CA 2226498 A1 19960201; CA 2226498 C 20030218; CN 1087585 C 20020710; CN 1155967 A 19970730; DE 69507484 D1 19990304; DE 69507484 T2 19990902; EP 0771518 A1 19970507; EP 0771518 B1 19990120; ES 2129838 T3 19990616; GB 2307119 A 19970514; GB 2307119 B 19980527; GB 9703695 D0 19970409; HK 1011517 A1 19990709; JP 3746295 B2 20060215; JP H10504122 A 19980414; MX 9700481 A 19981031; NZ 289906 A 19981028
DOCDB simple family (application)
GB 9501729 W 19950720; AT 95925944 T 19950720; AU 2988495 A 19950720; BR 9508791 A 19950720; CA 2226498 A 19950720; CN 95194706 A 19950720; DE 69507484 T 19950720; EP 95925944 A 19950720; ES 95925944 T 19950720; GB 9703695 A 19950720; HK 98112015 A 19981114; JP 50484196 A 19950720; MX 9700481 A 19970117; NZ 28990695 A 19950720