ABB 422B1275-1E Frequency Relay, Type 81, is a new ABB device designed to monitor electrical frequency in power systems. The unit lists voltage specifications of 48 125V and 120V 60Hz, and is identified by the part number 422B1275-1E with the Type 81 designation. This description confirms the model identity as 422B1275-1E, Type 81, in ABB's frequency relay lineup.
