INGEPAC™ EF ZT is a distance protection relay with five independent zones of operation on which MHO or quadrilateral characteristic can be set independently, suitable for transmission lines or multibreaker configurations such as breaker and a half or ring. It determines the type of fault, differentiating among three-phase, two-phase and earth faults.

INGEPAC™ EF ZT includes backup units for one or two breakers, synchronism checking functions or automatic reclose with different timings for single-pole or three-pole trips. It also provides teleprotection schemes or fault locator function that provides distance to the fault.