21.11.3 Setting guidelines............................................................................................................................28821.12 Test mode functionality TEST............................................................................................................29221.12.1 Application........................................................................................................................................ 29221.12.1.1 IEC 61850 protocol test mode................................................................................................... 29321.12.2 Setting guidelines............................................................................................................................29421.13 Time synchronization.......................................................................................................................... 29421.13.1 Application........................................................................................................................................ 29421.13.2 Setting guidelines............................................................................................................................29521.13.2.1 System time................................................................................................................................... 29521.13.2.2 Synchronization............................................................................................................................ 29521.13.2.3 Process bus IEC 61850-9-2LE synchronization.......................................................................296Section 22 Requirements....................................................................................................... 29722.1 Current transformer requirements...................................................................................................29722.1.1 Current transformer classification...............................................................................................29722.1.2 Conditions......................................................................................................................................... 29822.1.3 Fault current..................................................................................................................................... 29822.1.4 Secondary wire resistance and additional load.........................................................................29822.1.5 General current transformer requirements................................................................................29922.1.6 Rated equivalent secondary e.m.f. requirements..................................................................... 29922.1.7 Current transformer requirements for CTs according to other standards......................... 29922.1.7.1 Current transformers according to IEC 61869-2, class P, PR.............................................. 30022.1.7.2 Current transformers according to IEC 61869-2, class PX, PXR (and old IEC60044-6, class TPS and old British Standard, class X)..........................................................30022.1.7.3 Current transformers according to ANSI/IEEE...................................................................... 30022.2 Voltage transformer requirements...................................................................................................30122.3 SNTP server requirements.................................................................................................................. 30122.4 Sample specification of communication requirements for the protection and controlterminals in digital telecommunication networks........................................................................ 30222.5 IEC 61850-9-2LE Merging unit requirements .................................................................................303Section 23 Glossary................................................................................................................ 305Table of contents11Application manual
