ABB Relion 670 Series Applications Manual page 24

Table of contents
24.13.2 Setting guidelines..................................................................................................................595
24.13.2.1
24.13.2.2
24.13.2.3
Section 25 Requirements............................................................................................. 599
25.1 Current transformer requirements...................................................................................... 599
25.1.1 Current transformer basic classification and requirements........................................ 599
25.1.2 Conditions.............................................................................................................................. 600
25.1.3 Fault current............................................................................................................................601
25.1.4 Secondary wire resistance and additional load............................................................... 601
25.1.5 General current transformer requirements......................................................................602
25.1.6 Rated equivalent secondary e.m.f. requirements........................................................... 602
25.1.6.1
25.1.6.2
25.1.6.3
25.1.6.4
25.1.7 Current transformer requirements for CTs according to other standards...............604
25.1.7.1
25.1.7.2
25.1.7.3
25.2 Voltage transformer requirements......................................................................................606
25.3 SNTP server requirements..................................................................................................... 606
25.4 PTP requirements.................................................................................................................... 606
25.5 Sample specification of communication requirements for the protection and
control terminals in digital telecommunication networks..............................................606
25.6 IEC/UCA 61850-9-2LE Merging unit requirements .......................................................... 607
Section 26 Glossary ......................................................................................................609
18
System time.......................................................................................................................596
Synchronization................................................................................................................ 596
Process bus IEC/UCA 61850-9-2LE synchronization.................................................598
Breaker failure protection.............................................................................................. 602
Non-directional instantaneous and definitive time, phase and residual
overcurrent protection....................................................................................................603
Non-directional inverse time delayed phase and residual overcurrent
protection.......................................................................................................................... 603
Directional phase and residual overcurrent protection........................................... 604
Current transformers according to IEC 61869-2, class P, PR.................................. 605
Current transformers according to IEC 61869-2, class PX, PXR (and old IEC
60044-6, class TPS and old British Standard, class X)............................................. 605
Current transformers according to ANSI/IEEE.......................................................... 605
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1MRK 511 401-UEN Rev. K
Bay control REC670
Application manual