110/35 kV Salkhit Substation Earth Fault Protection

Highlights:

– Improved relay protection sensitivity and fast fault clearance — the core requirements of relay protection. First implementation in Mongolia of Multi-Frequency Adaptive Digital Protection for Single-phase-to-Earth (MFADPSDE) function.
– IEC61850-compliant microprocessor relay protection equipment installed at the substation

Works performed:

New earth fault protection solution with MFADPSDE function for 35 kV Feeders 1, 2, 3, and 4 — design, installation, and commissioning
Setting, configuration, and testing works

Solution:

REF615N relay with MFADPSDE earth fault protection function