ABB REL650 Applications Manual page 9

Application manual
Introduction............................................................................................. 89
Setting guidelines................................................................................... 89
Setting of the phase reference channel.............................................89
Relationships between setting parameter Base Current, CT rated
primary current and minimum pickup of a protection IED..................90
Setting of current channels................................................................90
Example 1.....................................................................................91
Example 2.....................................................................................92
Examples on how to connect, configure and set CT inputs for
most commonly used CT connections..........................................94
Example on how to connect a wye connected three-phase CT
set to the IED................................................................................95
Example how to connect single-phase CT to the IED.................. 98
Setting of voltage channels............................................................. 100
Example......................................................................................100
Examples how to connect, configure and set VT inputs for
most commonly used VT connections........................................100
Examples on how to connect a three phase-to-ground
connected VT to the IED............................................................ 101
Section 5 Local human-machine interface........................................ 105
Local HMI..............................................................................................105
Display.............................................................................................105
LEDs................................................................................................107
Keypad............................................................................................ 108
Local HMI functionality.................................................................... 110
Protection and alarm indication.................................................. 110
Parameter management ............................................................111
Front communication.................................................................. 111
Section 6 Impedance protection........................................................113
Five zone distance protection, quadrilateral and mho characteristic
ZQMPDIS (21)...................................................................................... 113
Identification.................................................................................... 113
Application....................................................................................... 113
System grounding.......................................................................114
Fault infeed from remote end..................................................... 117
Short line application.................................................................. 118
Long transmission line application..............................................119
Parallel line application with mutual coupling............................. 120
Tapped line application...............................................................125
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