Calculating General Settings For Analogue Aim Inputs 6I 4U - ABB Relion 650 Series Applications Manual

Section 3
REB650 setting examples
3.1.2

Calculating general settings for analogue AIM inputs 6I 4U

The analogue input module (AIM) has the capability of 6 current inputs (tapped to 1 or 5 A) and 4
voltage inputs.
The high impedance differential protection (HZPDIF, 87) zone 2 external differential circuits are
connected to inputs 1 – 3 (A, B and C).
The bus coupler phase CTs (three-phase current transformer group) are connected to inputs 4 – 6
(A, B and C).
The 145 kV busbar section 1 phase VT is connected to inputs 7 - 9 (A, B and C).
The 145 kV busbar section 1 open delta-connected VT is connected to input 10.
1. Set the current transformer inputs.
1.1.
1.2.
1.3.
1.4.
1.5.
1.6.
1.7.
2. Set the voltage transformer inputs.
2.1.
2.2.
2.3.
3. Set
(The rated secondary voltage of the VT)
4. Set
This gives equivalent of ratio
32
Set CTStarPoint1 to To Object . This setting has no effect on the performance of the
protection function.
CTSec1 to 1 A .
Set
CTPrim1 to 1 A .
Set
Set the same values for current inputs 2 and 3.
CTStarPoint4 to To Object .
Set
The CT secondary is grounded towards the bus coupler.
CTSec4 to 1 A .
Set
(The rated secondary current of the CT)
Set CTPrim4 to 600 A .
(The rated primary current of the CT)
Set VTSec7 to 110 V
(The rated secondary voltage of the VT, given as phase-to-phase voltage)
VTPrim7 to 145 kV .
Set
(The rated secondary voltage of the VT, given as phase-to-phase voltage)
Set the same values for voltage inputs 8 and 9.
VTSec10 to 110 V .
VTPrim10 to 145 kV .
© Copyright 2013 ABB. All rights reserved
145 145 0.11
=
/ kV
0.11
3 3
145 145 0.11
=
/ kV
0.11
3 3
1MRK 505 287-UUS B
GUID-71ACF875-0859-402B-9900-FFD586F7553D v2
Busbar protection REB650
Application manual