The ANSI protective functions are functions present in protective devices such as a relay. They are identified by the ANSI standard device numbers (ANSI / IEEE Standard C37. 2 Standard for Electrical Power System Device Function Numbers, Acronyms, and Contact Designations).

What is ansi69?

69 – Permissive Control Device. 70 – Rheostat. 71 – Liquid Switch, Level Switch.

What is the device function number of directional power relay?

32. Directional Power Relay. Device that functions on a desired value of power flow in a given direction, or upon reverse power resulting from arcback in the anode or cathode circuits of a power rectifier.