ABB RELION 670 Series Applications Manual page 17

21.11.3 Setting guidelines............................................................................................................................288
21.12 Test mode functionality TEST............................................................................................................292
21.12.1 Application........................................................................................................................................ 292
21.12.1.1 IEC 61850 protocol test mode................................................................................................... 293
21.12.2 Setting guidelines............................................................................................................................294
21.13 Time synchronization.......................................................................................................................... 294
21.13.1 Application........................................................................................................................................ 294
21.13.2 Setting guidelines............................................................................................................................295
21.13.2.1 System time................................................................................................................................... 295
21.13.2.2 Synchronization............................................................................................................................ 295
21.13.2.3 Process bus IEC 61850-9-2LE synchronization.......................................................................296
Section 22 Requirements....................................................................................................... 297
22.1 Current transformer requirements...................................................................................................297
22.1.1 Current transformer classification...............................................................................................297
22.1.2 Conditions......................................................................................................................................... 298
22.1.3 Fault current..................................................................................................................................... 298
22.1.4 Secondary wire resistance and additional load.........................................................................298
22.1.5 General current transformer requirements................................................................................299
22.1.6 Rated equivalent secondary e.m.f. requirements..................................................................... 299
22.1.7 Current transformer requirements for CTs according to other standards......................... 299
22.1.7.1 Current transformers according to IEC 61869-2, class P, PR.............................................. 300
22.1.7.2 Current transformers according to IEC 61869-2, class PX, PXR (and old IEC
60044-6, class TPS and old British Standard, class X)..........................................................300
22.1.7.3 Current transformers according to ANSI/IEEE...................................................................... 300
22.2 Voltage transformer requirements...................................................................................................301
22.3 SNTP server requirements.................................................................................................................. 301
22.4 Sample specification of communication requirements for the protection and control
terminals in digital telecommunication networks........................................................................ 302
22.5 IEC 61850-9-2LE Merging unit requirements .................................................................................303
Section 23 Glossary................................................................................................................ 305
Application manual
Table of contents
11