Schematic Case of Secondary Circuit Transformation of Power-off Delay Relay
In industrial production,it is often encountered"voltage sag"situations that cause stoppage of controlled equipment.The power-off delay relay is widely used in the voltage sag protection of motors in factories due to convenient installation and maintenance.The principle of power-off delay relay is not complicated,but various problems will be encountered during commissioning,such as the failure of part of the function of the secondary circuit due product promotion,or the relay with other functions in the secondary circuit may cause conflicts.This paper reports the application of interrupt power delay relays for a retrofit project.
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