Siemens SIPROTEC 4 User Manual

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.
Display of Measured Values
Table 2-28 Conversion formulae between secondary values and primary/percentage values
Measured
Values
sekun-
dary
primary %
Ι
A
, Ι
B
, Ι
C
,
Ι
1
, Ι
2
Ι
sec.
Ι
E
= 3 ·Ι
0
(calculated)
Ι
e sec.
Ι
N
= measured
value of Ι
N
-input
Ι
N sec.
Ι
Ns
(ΙNs,
Ι
3I0real
,
Ι
3I0reakctiv
)
Ι
Ns sec.
V
A
, V
B
, V
C
,
V
0
, V
1
, V
2
,
V
syn
V
Ph-N sec.
V
A–B
, V
B–C
, V
C–A
V
Ph-Ph sec.
V
N
V
N sec.
P, Q, S (P and Q
phase-segre-
gated)
No secondary measured values
Power Factor
(phase-segre-
gated)
cos φ cos φ cos φ · 100 in %
Frequency
Protection
f in Hz f in Hz
Table 2-29 Legend for the conversion formulae
Parameter Address Parameter Address
CT PRIMARY
204
Ignd-CT PRIM
217
2.25.3.1
Functions
2.25 Auxiliary Functions
330 SIPROTEC 4, 7SJ62/64, Manual
C53000-G1140-C207-8, Edition 08.2016

Siemens SIPROTEC 4 Specifications

General

Brand	Siemens
Model	SIPROTEC 4
Category	Protection Device
Language	English