ABB REC670 Applications Manual page 25

Bay control REC670 2.2 ANSI
Application manual
Section 24 Requirements.................................................................... 627
Current transformer requirements........................................................ 627
Current transformer basic classification and requirements............. 627
Conditions........................................................................................629
Fault current.....................................................................................630
Secondary wire resistance and additional load............................... 630
General current transformer requirements...................................... 631
Rated equivalent secondary e.m.f. requirements............................ 631
Breaker failure protection........................................................... 632
Non-directional instantaneous and definitive time, phase
and residual overcurrent protection............................................ 632
Non-directional inverse time delayed phase and residual
overcurrent protection.................................................................633
Directional phase and residual overcurrent protection............... 634
Current transformer requirements for CTs according to other
standards.........................................................................................635
Current transformers according to IEC 61869-2, class P, PR.... 635
Current transformers according to IEC 61869-2, class PX,
PXR (and old IEC 60044-6, class TPS
and old British Standard, class X).............................................. 635
Current transformers according to ANSI/IEEE........................... 636
Voltage transformer requirements........................................................ 637
SNTP server requirements................................................................... 637
PTP requirements.................................................................................637
Sample specification of communication requirements for the
protection and control terminals in digital telecommunication
networks............................................................................................... 638
Section 25 Glossary............................................................................ 641
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