overcurrent protection (digital power) (OCP)

An overcurrent protection device, Overcurrent Protection (OCP), is an electronic device that breaks the circuit when an allowable current is exceeded, thereby preventing excessive temperature rise in the power conductors.

Overcurrent protection devices safeguard power lines, electronic components, switching contacts, and relay contacts against excessive currents. Unlike overload protection devices, electronic overcurrent protection circuits have short response times and respond to short circuits and momentary overcurrent conditions, such as those that occur during lightning strikes and high static discharges. The rating of overcurrent protection devices is based on the wire gauge or cable diameter and the potential fault current for the line-side connections of the equipment.

Overcurrent Protection Devices (OCPD) are used in main power lines, in feeder lines and in branch circuits in residential, commercial and industrial buildings.