Technical Specifications: Incorporates zero-sequence current compensation; adjustable reach settings; frequency response 47–63 Hz.

Functional Features: Calculates fault distance accurately even in parallel line configurations; includes logic to prevent false tripping due to mutual inductance.

Application Scenarios: Primary protection for high-voltage transmission lines and substation feeders in utility grids.

Performance Parameters: High-speed tripping for close-in faults; zone selectivity for coordination with downstream devices.

Installation Requirements: Rack-mounted in a relay panel; requires CT and VT inputs with appropriate burden calculations.

Usage Notes: Regular testing using secondary injection kits is mandatory; ensure zero-sequence compensation factors are correctly programmed based on system studies.