ABB RET670 - Default Chapter; Table of Contents

Table of contents
Section 1 Introduction..........................................................................15
Introduction to the application manual....................................................15
About the complete set of manuals for an IED..................................15
About the application manual............................................................16
Intended audience.............................................................................17
Related documents............................................................................17
Revision notes...................................................................................17
Section 2 Requirements......................................................................19
Current transformer requirements..........................................................19
Current transformer classification......................................................19
Conditions..........................................................................................20
Fault current.......................................................................................21
Secondary wire resistance and additional load.................................21
General current transformer requirements........................................22
Rated equivalent secondary e.m.f. requirements..............................22
Transformer differential protection................................................22
Distance protection.......................................................................23
Restricted ground fault protection (low impedance
differential)....................................................................................24
Current transformer requirements for CTs according to other
standards...........................................................................................27
Current transformers according to IEC 60044-1,
class P, PR...................................................................................27
Current transformers according to IEC 60044-1, class PX,
IEC 60044-6, class TPS (and old British Standard, class X)........28
Current transformers according to ANSI/IEEE.............................28
Voltage transformer requirements..........................................................29
SNTP server requirements.....................................................................29
IEC 61850-9-2LE Merging unit requirements ........................................30
Section 3 IED application....................................................................31
General IED application..........................................................................31
Analog inputs..........................................................................................33
Introduction........................................................................................33
Setting guidelines..............................................................................33
Setting of the phase reference channel........................................33
Table of contents
1
Application manual