Section 2 Available functions2.1 Main protection functionsIEC 61850 orFunction nameANSI Function description GeneratorREG650REG650 (B01A)Gen diffREG650 (B05A)Gen+Trafo diffDifferential protectionT3WPDIF 87T Transformer differential protection, three winding 0–1 1REFPDIF 87N Restricted earth fault protection, low impedance 0–1HZPDIF 87 1Ph High impedance differential protection 0–1 1 1GENPDIF 87G Generator differential protection 0–1 1Impedance protectionZMRPSB 68 Power swing detection 0–1ZGCPDIS 21G Underimpedance protection for generators and transformers 0–1 1 1LEXPDIS 40 Loss of excitation 0–1 1 1LEPDIS Load encroachment 0–1 1 12.2 Back-up protection functionsIEC 61850 orFunction nameANSI Function description GeneratorREG650REG650 (B01A)Gen diffREG650 (B05A)Gen+Trafo diffCurrent protectionOC4PTOC 51/67 Four step phase overcurrent protection, 3-phase output 0–2 2 2EF4PTOC 51N/67N Four step residual overcurrent protection, zero/negativesequence direction0–2 2 2SDEPSDE 67N Sensitive directional residual overcurrent and power protection 0–1 1 1Table continues on next page1MRK 502 048-UUS A Section 2Available functions39Technical manual
