Attributes . DIB02 and PIB02 are precise TRMS AC⁄DC over or under current (selectable by DIP switch) monitoring relays. The current is measured through an external shunt. 1-phase and 3-phase current up to 500 AAC can be monitored connecting MI or MP current transformers. Owing to the built-in latch function, the ON-position of the relay output can be maintained. Inhibit function can be used to avoid relay operation when not desired (maintenance, transitions). The LED . Names