ABB ret650 - Page 18

Frequency values...................................................................... 347
Setting guidelines...................................................................... 348
Test mode functionality TESTMODE..............................................353
Application................................................................................. 353
IEC 61850 protocol test mode..............................................353
Setting guidelines...................................................................... 354
Time synchronization TIMESYNCHGEN........................................354
Application................................................................................. 354
Setting guidelines...................................................................... 355
System time..........................................................................355
Synchronization....................................................................356
Process bus IEC/UCA 61850-9-2LE synchronization.......... 359
Section 19 Requirements...............................................................361
Current transformer requirements.................................................. 361
Current transformer basic classification and requirements....... 361
Conditions..................................................................................363
Fault current.............................................................................. 364
Secondary wire resistance and additional load......................... 364
General current transformer requirements................................ 365
Rated equivalent secondary e.m.f. requirements...................... 365
Transformer differential protection....................................... 365
Distance protection...............................................................366
Breaker failure protection..................................................... 368
Restricted earth fault protection (low impedance
differential)............................................................................368
Current transformer requirements for CTs according to
other standards..........................................................................371
Current transformers according to IEC 61869-2,
class P, PR...........................................................................371
Current transformers according to IEC 61869-2, class
PX, PXR (and old IEC 60044-6, class TPS
and old British Standard, class X)........................................ 371
Current transformers according to ANSI/IEEE..................... 372
Voltage transformer requirements.................................................. 372
SNTP server requirements............................................................. 373
PTP requirements...........................................................................373
IEC/UCA 61850-9-2LE Merging unit requirements ....................... 373
Section 20 Glossary....................................................................... 375
Table of contents
12 Transformer protection RET650 2.2 IEC
Application manual