ABB REB650 - Page 8

Example how to connect delta connected three-phase
CT set to the IED....................................................................46
Example how to connect single-phase CT to the IED............ 49
Relationships between setting parameter Base Current, CT
rated primary current and minimum pickup of a protection IED.. 51
Setting of voltage channels......................................................... 51
Example................................................................................. 51
Examples how to connect, configure and set VT inputs
for most commonly used VT connections.............................. 52
Examples on how to connect a three phase-to-earth
connected VT to the IED........................................................ 53
Example on how to connect a phase-to-phase
connected VT to the IED........................................................ 55
Example on how to connect an open delta VT to the IED
for high impedance earthed or unearthed networks...............57
Example how to connect the open delta VT to the IED
for low impedance earthed or solidly earthed
power systems....................................................................... 60
Section 5 Local HMI....................................................................... 63
Display..............................................................................................64
LEDs.................................................................................................66
Keypad............................................................................................. 67
Local HMI functionality..................................................................... 69
Protection and alarm indication................................................... 69
Parameter management .............................................................70
Front communication................................................................... 71
Section 6 Differential protection..................................................... 73
High impedance differential protection, single phase HZPDIF ........ 73
Identification................................................................................ 73
Application................................................................................... 73
The basics of the high impedance principle........................... 74
Connection examples for high impedance differential
protection.....................................................................................80
Connections for three-phase high impedance differential
protection................................................................................80
Connections for 1Ph High impedance differential
protection HZPDIF..................................................................81
Setting guidelines........................................................................ 82
Configuration.......................................................................... 82
Settings of protection function................................................ 82
T-feeder protection................................................................. 83
Tertiary reactor protection...................................................... 86
Alarm level operation..............................................................89
Table of contents
2 Busbar protection REB650 2.2 IEC
Application manual