Improvements in and relating to electromechanical relays

Details Improvements in and relating to electromechanical relays Improvements in and relating to electromechanical relays

H - Electricity

01

H

H01H 47/00 (2006.01) H02H 3/24 (2006.01)

Patent

CA 2141848

2141848 9502254 PCTABS00035 A device for preventing welding of the switch contacts of a heavy duty electromechanical relay comprises means (15, 16 and 17) adapted in use for monitoring the voltage supply to the relay coil (2) and detecting low voltage excursions therein. A counter (14) counts the number of low voltage excursions in the voltage supply to the relay coil (2) and an electronic switch (12) disconnects the voltage supply to the relay (2) if the number of low voltage excursions counted exceeds a predetermined number.

Dispositif servant à empêcher la fusion des contacts de commutation d'un relai électromécanique à capacité élevée et comprenant des moyens (15, 16 et 17) conçus pour contrôler l'alimentation en tension de la bobine du relais (2), ainsi que pour détecter les écarts de basse tension dans ladite alimentation. Un compteur (14) compte le nombre d'écarts de basse tension dans l'alimentation en tension de la bobine (2) et un commutateur électronique (12) coupe l'alimentation en tension du relais (2) si le nombre d'écarts de basse tension comptés dépasse un nombre prédéterminé.

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