Scaling The Rated Values Of The Protected Unit For Analog Channels - ABB REF 54 Series Technical Reference Manual, General

REF 54_
5.1.6.1.
38
Feeder Terminal
Technical Reference Manual, General
Table 5.1.6-1 Physical analog channels of the feeder terminals
Current Voltage Transformer
Ch
Transformer (CT) (VT)
No.
1
Current
2 Transformer CT1
(I = 1 A/5 A)
n
Current
3
Transformer CT2
(I = 1 A/5 A)
n
Current
4
Transformer CT3
(I = 1 A/5 A)
n
Current
5
Transformer CT4
(I = 1 A/5 A)
n
Current
Transformer CT5
6
(I = 0.2 A/1 A)
n
Voltage Transformer
7
VT1 (U
n
115V/120V)
Voltage Transformer
8
VT2 (U
n
115V/120V)
Voltage Transformer
9 VT3 (U
n
115V/120V)
Voltage Transformer
10 VT4 (U
n
115V/120V)
The letters b and c after the signal type are used to distinguish between signals of the same type.
Scaling the rated values of the protected unit for analog
channels
A separate scaling factor can be set for each analog channel. The factors enable
differences between the ratings of the protected unit and those of the measuring
device (CTs, VTs and so on) The setting value 1.000
the protected unit is exactly the same as that of the measuring device.
When scaling factors are used, it should be noted that they affect the operation
accuracy and the dynamic measuring range of the terminal. The accuracies stated in
the description of each function block (see the CD-ROM "Technical Descriptions of
Functions") only apply with the default values of the scaling factors. For example,
a high factor affects the operation of sensitive protection functions, such as the
directional earth-fault protection.
1. Prior to Release 2.5 with two decimals only.
Measuring units
Rogovski coil/- Voltage
sensor (RS) divider (VD)
RS 1...10 VD 1...10
RS 1...10 VD 1...10
RS 1...10 VD 1...10
=100V/110V/
=100V/110V/
=100V/110V/
=100V/110V/
1MRS750527-MUM
General Signal type (selectable
measure- alternatives)
ment
Gen. meas. Not in use,
1...3 I , I , I ,
L1 L2 L3
I I I
L1b, L2b, L3b,
U , U , U ,
1 2 3
U , U , U ,
1b 2b 3b
U ,
1c
GE1, GE2, GE3
Gen. meas. Not in use,
1...3 I , I , I ,
L1 L2 L3
I I I
L1b, L2b, L3b,
I , I ,
0 0b
U , U , U ,
1 2 3
U , U , U ,
1b 2b 3b
U ,
1c
GE1, GE2, GE3
Not in use,
I , I , I ,
L1 L2 L3
I I I
L1b, L2b, L3b,
I I
0, 0b
Gen. meas. Not in use,
1...3 I , I , I ,
L1 L2 L3
I I I
L1b, L2b, L3b,
U , U , U ,
12 23 31
U , U , U
12b 23b 31b
U ,
12c
U , U , U ,
1 2 3
U , U , U ,
1b 2b 3b
U ,
1c
U , U ,
0 0b
GE1, GE2, GE3
1
means that the rated value of
,