Self-learning field isolator. Self-learning. Stand-by loss only 0.8 Watt. The latest hybrid technology combines the advantages of wear-free electronic control with high switching capacity of special relays. The field isolator switches off the power supply after switching off downstream consumers and thus prevents interfering electromagnetic fields. Up to a current consumption of 200mA, small consumers are permitted, which do not prevent field activation after switching off larger loads. The limit value does not have to be set manually, but is learned by the FR12 with a patented procedure itself. Consumers with more than 200mA power consumption are always defined as consumers, which are supposed to cause the mains voltage to be switched on. As long as no larger load is switched on, the monitored circuit 1-pole remains switched off from the mains. Neutral and earth conductors are not switched to prevent an antenna effect. For monitoring, an adjustable DC voltage with low ripple is applie