Display Of Measured Values - Siemens SIPROTEC 4 User Manual

Functions
2.25 Auxiliary Functions
Applications
•
Information on the actual status of the system
•
Conversion of secondary values to primary values and percentages
Prerequisites
Except for secondary values, the device is able to indicate the primary values and percentages of the measured
values.
A precondition correct display of the primary and percentage values is the complete and correct entry of the
nominal values for the instrument transformers and the protected equipment as well as current and voltage
transformer ratios in the ground paths when configuring the device. The following table shows the formulas
which are the basis for the conversion of secondary values to primary values and percentages.
2.25.3.1

Display of Measured Values

Table 2-28
Measured sekun-
Values dary
, Ι , Ι ,
Ι Ι
A B C sec.
, Ι
Ι
1 2
= 3 ·Ι
Ι Ι
E 0 e sec.
(calculated)
= measured
Ι Ι
N N sec.
value of Ι -input
N
Ι Ι
Ns Ns sec.
(ΙNs,
,
Ι
3I0real
)
Ι
3I0reakctiv
V , V , V , V
A B C Ph-N sec.
V , V , V ,
0 1 2
V
syn
V , V , V V
A–B B–C C–A Ph-Ph sec.
V V
N N sec.
P, Q, S (P and Q No secondary measured values
phase-segre-
gated)
Power Factor cos φ
(phase-segre-
gated)
Frequency f in Hz
Protection
Table 2-29
Parameter
CT PRIMARY
330
Conversion formulae between secondary values and primary/percentage values
primary
cos φ
f in Hz
Legend for the conversion formulae
Address
204
cos φ · 100 in %
Parameter
Ignd-CT PRIM
SIPROTEC 4, 7SJ62/64, Manual
C53000-G1140-C207-8, Edition 08.2016
%
Address
217