ABB RELION REB670, Applications Manual

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Example 1.....................................................................................69
Example 2.....................................................................................69
Example 3.....................................................................................70
Examples on how to connect, configure and set CT inputs
for most commonly used CT connections.................................... 73
Example on how to connect a wye connected three-phase
CT set to the IED..........................................................................74
Example how to connect delta connected three-phase CT
set to the IED................................................................................79
Example how to connect single-phase CT to the IED.................. 82
Relationships between setting parameter Base Current, CT
rated primary current and minimum pickup of a protection IED........ 84
Setting of voltage channels............................................................... 84
Example........................................................................................85
Examples how to connect, configure and set VT inputs for
most commonly used VT connections..........................................85
Examples on how to connect a three phase-to-ground
connected VT to the IED.............................................................. 86
Example on how to connect a phase-to-phase connected
VT to the IED................................................................................88
Example on how to connect an open delta VT to the IED for
high impedance grounded or ungrounded networks.................... 90
Example how to connect the open delta VT to the IED for
low impedance grounded or solidly grounded power systems.....93
Section 5 Local HMI............................................................................ 97
Display....................................................................................................98
LEDs.....................................................................................................101
Keypad..................................................................................................102
Local HMI functionality..........................................................................104
Protection and alarm indication....................................................... 104
Parameter management .................................................................105
Front communication....................................................................... 106
Section 6 Differential protection........................................................ 107
Busbar differential protection ...............................................................107
Identification.................................................................................... 107
Basic applications............................................................................109
General.......................................................................................109
Meshed corner application and T-connection application.......... 109
Busbar protection applications........................................................ 109
General.......................................................................................110
Table of contents
2 Busbar protection REB670 2.2 ANSI
Application manual