Siemens 6MD85, Manual

Page: 997 / 1256

Operational Measured Values
Operational measured values are assigned to different function groups.
The values can be displayed as primary and secondary values and as percentage values.
The operational measured values are calculated according to the following definition equations:
RMS values
Active power
Apparent power
Reactive power
n
φ
n
Harmonic order
The angle difference between the voltage and current of the nth harmonic
Power factor
Active power factor
Voltage/Current 3-Phase Function Group
The following table describes the operational measured values of the 3-phase voltage/current function
group.
All protection functions have access to the values.
Table 9-1 Operational Measured Values of the Voltage/Current 3-Phase Function Group
Measured Values Primary Secon-
dary % Referenced to
I
A
, I
B
, I
C
Phase currents A A Rated operating current of the primary values
3I0 Calculated zero-sequence
current A A Rated operating current of the primary values
I
N
Neutral-point phase current A A Rated operating current of the primary values
V
A
, V
B
, V
C
Phase-to-ground voltages kV V Rated operating voltage of primary values/√3
V
AB
, V
BC
, V
CA
Phase-to-phase voltage kV V Rated operating voltage of the primary values
V
0
Calculated zero-sequence
voltage kV V Rated operating voltage of primary values/√3
V
N
Measured neutral-point
displacement voltage kV V Rated operating voltage of primary values/√3
f Frequency Hz Hz Rated frequency
P Active power
(total power) MW – Active power of the primary values
√3 · V
rated
· I
rated
Q Reactive power
(total power) Mvar – Reactive power of the primary values
√3 · V
rated
· I
rated
S Apparent power
(total power) MVA – Apparent power of the primary values
√3 · V
rated
· I
rated
9.3
Measured Values, Energy Values, and Supervision of the Primary System
9.3 Operational Measured Values
SIPROTEC 5, High-Voltage Bay Controller, Manual 997
C53000-G5040-C015-9, Edition 11.2017