DEPOSITION DETECTING DEVICE FOR BLOCKING THE ACTION ERROR OF A RELAY DUE TO THE DEPOSITION OF THE CONTACT POINT OF THE RELAY

摘要

PURPOSE: A deposition detecting device for a relay is provided to prevent accidents on a load side due to the malfunction or errors in a relay by detecting the deposition of the contact point of the relay using a deposition detection circuit connected to the output of the relay.;CONSTITUTION: A power supply unit (10) supplies power used inside a relay. A first relay unit (20) maintains or cuts the electric connection to a load (70) by switching the contact point of the relay. A second relay unit (30) outputs a signal to control the operation of the load by switching the contact point of the relay. A deposition sensor (40) generates a sensing signal according to the switching operation status of the second relay unit and sends feedback to a control unit. A switching power generation unit (50) launches and outputs switching power for use in the deposition sensor.;COPYRIGHT KIPO 2013;[Reference numerals] (10) Power supply unit; (20) First relay unit; (30) Second relay unit; (40) Deposition sensor; (50) Switching power generation unit; (60) Control unit; (70) Load