A.12
SEL-421 Relay Instruction Manual Date Code 20171021
Firmware, ICD File, and Manual Versions
Instruction Manual
Command Summary
➤ Added COM PTP, CFG CTNOM, and CFG NFREQ.
20160615
➤ Initial version.
Table A.4 Instruction Manual Revision History (Sheet 3 of 3)
Date Code Summary of Revisions