Two terminal arc suppressor

摘要

A two terminal arc suppressor for protecting switch, relay or contactor contacts and the like comprises a two terminal module adapted to be attached in parallel with the contacts to be protected and including a circuit for deriving an operating voltage upon the transitioning of the switch, relay or contactor contacts from a closed to an open disposition, the power being rectified and the resulting DC signal used to trigger a power triac switch via an optoisolator circuit whereby arc suppression pulses are generated for short predetermined intervals only at a transition of the mechanical switch, relay or contactor contacts from an closed to an open transition and, again, at an open to a close transition during contact bounce conditions.

主权项

1. An arc suppressor, comprising:
a contact separation detector circuit, coupled to electrical contacts, configured to detect a separation of the electrical contacts and output a signal indicative of the separation; and a contact bypass circuit, connected between the electrical contacts and coupled to the contact separation detector, configured to switch from a non-conductive state to a conductive state upon receiving the signal indication of the separation of the electrical contacts.