Measurement; Display Of Measured Values - Siemens 7SC80 Manual

Functions
2.26 Auxiliary Functions

Measurement

2.26.3
A series of measured values and values derived from these are constantly available for call-up by the Web
Monitor, or for data transfer.
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.
When using the Vab, Vbc type of connection for the voltage transformers (address 213VT Connect.
3ph), the measured values for power P, Q, S, power factor, energy, and the values derived from these, e.g.
mean values, etc., are not available.
Measured values which cannot be calculated due to the selected voltage connection are shown as dots.
2.26.3.1

Display of Measured Values

Measured Secon-
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 e sec.
value from the
input
Ι
N
V , V , V , V
A B C L-E sec.
V , V , V
0 1 2
V , V , V V
A–B B–C Ph-Ph Ph-Ph sec.
sec.C–A
P, Q, S (P and Q No secondary measured values
phase-segre-
gated)
Power factor cos φ
(phase-segre-
gated)
Frequency f in Hz
Table 2-26
Parameter
Vnom PRIMARY
Vnom SECONDARY
372
Primary
cos φ
f in Hz
Legend for the conversion formulae
Adresse
202
203
cos φ · 100 in %
Parameter
Ignd-CT PRIM
Ignd-CT SEC
SIPROTEC Compact, 7SC80, Manual
E50417-G1140-C486-A8, Edition 07.2017
%
Adresse
217
218