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Priority relays are used, among others, when the current circuit is connected to at least two high-power receivers that can work independently, and their simultaneous operation would cause the current protection to trip.
The potentiometer is used to set the value of current consumption in the priority circuit, above which the relay disconnects the non-priority circuit. A decrease in the current consumption in the priority circuit below the set threshold value will automatically switch on the non-priority circuit. In case the receiver is already enabled. the priority relay will prevent the load from being switched on.
The current of the priority and non-priority receiver cannot exceed 16A.