EP 0200099 A3 19890517 - CONTROL CIRCUIT FOR AN ELECTROMAGNETIC RELAY TO INTERRUPT AN AC CIRCUIT UNDER TENSION
Title (en)
CONTROL CIRCUIT FOR AN ELECTROMAGNETIC RELAY TO INTERRUPT AN AC CIRCUIT UNDER TENSION
Publication
Application
Priority
DE 3514300 A 19850419
Abstract (en)
[origin: EP0200099A2] In a control circuit for a relay for switching an AC load, the zero transition of the AC voltage is sampled and is used to control the relay at a predetermined response time before the next zero transition. In this case, the relay is connected via a timer (R1, C1) to a supply voltage (UN) which is significantly greater than the rated voltage of the relay, such that when the semi conductor switch is switched on, a voltage surge initially occurs on the relay winding which reduces the range of variation of the response time to a minimum level. In this way, the load circuit can be switched on and off fairly precisely in the vicinity of the zero transition. <IMAGE>
IPC 1-7
IPC 8 full level
H01H 9/56 (2006.01); H01H 47/04 (2006.01)
CPC (source: EP)
H01H 9/56 (2013.01); H01H 47/043 (2013.01)
Citation (search report)
- DE 2929261 A1 19810205 - LICENTIA GMBH
- DE 1072678 B
- DE 2143292 A1 19730308 - ROUVET JAQUES
- FR 2488036 A3 19820205 - LANDIS & GYR AG [CH]
Designated contracting state (EPC)
AT CH DE FR LI NL
DOCDB simple family (publication)
EP 0200099 A2 19861105; EP 0200099 A3 19890517; EP 0200099 B1 19910911; AT E67341 T1 19910915; DE 3681326 D1 19911017
DOCDB simple family (application)
EP 86105271 A 19860416; AT 86105271 T 19860416; DE 3681326 T 19860416