ABB REC650 Applications Manual page 8

Table of contents
2
Calculating settings for step 1...................................................... 44
Calculating settings for four step phase overcurrent protection 3-
phase output, LV-side OC4PTOC (51_67)........................................ 46
Calculating general settings......................................................... 47
Calculating settings for step 1 ..................................................... 47
Calculating settings for step 4...................................................... 48
Calculating settings for four step residual overcurrent protection,
zero or negative sequence direction HV-side EF4PTOC (51N/67N).50
Calculating general settings......................................................... 51
Calculating settings for step 1...................................................... 52
Calculating settings for step 2...................................................... 54
Calculating settings for step 4...................................................... 55
Calculating settings for two step residual overvoltage protection
LV-side, ROV2PTOV (59N)............................................................... 55
Calculating settings for HV-side breaker failure protection,
CCRBRF (50BF)................................................................................57
Calculating settings for LV-side breaker failure protection,
CCRBRF (50BF)................................................................................58
Section 4 Analog inputs.......................................................................61
Introduction............................................................................................. 61
Setting guidelines................................................................................... 61
Setting of the phase reference channel.............................................61
Relationships between setting parameter Base Current, CT rated
primary current and minimum pickup of a protection IED..................62
Setting of current channels................................................................62
Example 1.....................................................................................63
Example 2.....................................................................................64
Examples on how to connect, configure and set CT inputs for
most commonly used CT connections..........................................66
Example on how to connect a wye connected three-phase CT
set to the IED................................................................................67
Setting of voltage channels............................................................... 70
Example........................................................................................71
Examples how to connect, configure and set VT inputs for
most commonly used VT connections..........................................71
Examples on how to connect a three phase-to-ground
connected VT to the IED.............................................................. 72
Example on how to connect a phase-to-phase connected VT
to the IED......................................................................................73
Section 5 Local human-machine interface.......................................... 77
Application manual