2.35 Ancillary Functions
211
7UM61 Manual
C53000-G1176-C127-3
2.35.2 Measurement
A series of measured values and the values derived from them are constantly avail-
able for call up on site, or for data transfer (See table 2-12, as well as the following list).
2.35.2.1 Functional Description
Display of Mea-
sured Values
The operational measured values listed in Table 2-12 can be read out as secondary,
primary or percent values. A precondition for correctly displaying the primary and per-
centage values is complete and correct entry of the nominal values for the current
transformers and other equipment, as well as the transformation ratios of the current
and voltage transformers in the earth paths, in accordance with Subsections2.3 and
2.5. Table 2-12 lists the formulae for conversion of secondary into primary or percent-
age values.
Depending on the version ordered, the type of device connection and the configured
protection functions, only a part of the operational measured values listed in the fol-
lowing table may be available. The displacement voltage 3 U
0
is calculated from the
phase-earth voltages: 3 U
0
= |U
L1
+ U
L2
+ U
L3
|. All three voltage inputs must be phase-
ground connected for this.
Table 2-12
Conversion formulae between secondary values and primary/percentage
values
Measured
Values
Secondary
Primary
%
I
L1
, I
L2
,
I
L3
, I
1
, I
2
,
3I
0
I
sec.
I
Ns
I
EE sec.
U
L1E
,
U
L2E
,
U
L3E
,
U
0
, U
1
, U
2
U
Ph-N sec.
U
L1-L2
,
U
L2-L3
,
U
L3-L1
U
Ph Ph sec.
U
0
U
E sec.
U
E
measured:
U
E
computed:
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