Transmitting Measured Values - Siemens 7SC80 Manual

Parameter
CT PRIMARY
CT SECONDARY
Vph/Vdelta
Depending on the type of device ordered and the device connections, some of the operational measured
values listed below may not be available. The phase–to–ground voltages are either measured directly, if the
voltage inputs are connected phase–to–ground, or they are calculated from the phase–to–phase voltages V
and V and the displacement voltage V
B–C
The displacement voltage V
[verlagerungsspannunguen-020315-wlk, 1, en_US]
Please note that value V
The ground current Ι
[erdstrom-020315-wlk, 1, en_US]
Upon delivery, the power and operating values are set in such manner that power in line direction is positive.
Active components in line direction and inductive reactive components in line direction are also positive. The
same applies to the power factor cosϕ. It is occasionally desired to define the power drawn from the line (e.g.
as seen from the consumer) positively. Using parameter 1108 P,Q sign the signs for these components can
be inverted.
The calculation of the operational measured values also takes place while a fault is running. The values are
updated at intervals of > 0.3 s and < 1 s.
2.26.3.2

Transmitting Measured Values

Measured values can be transmitted to a central control and storage device via port F.
The measuring range in which these values are transmitted depends on the protocol and additional settings, if
applicable.
Protocol
IEC 61850
DNP3.0
DNP3 TCP
PROFINET
IEC 60870-5-104
SIPROTEC Compact, 7SC80, Manual
E50417-G1140-C486-A8, Edition 07.2017
Adresse
204
205
206
.
N
is either measured directly or calculated from the phase-to-ground voltages:
N
is indicated in the operational measured values.
0
is either measured directly or calculated from the conductor currents.
N
Transmittable measuring range, format
The primary operational measured values are transmitted.
The measured values as well as their unit format are set out in detail in the PIXIT docu-
ment of the 7SC80 device.
The measured values are transmitted in "Float" format. The transmittable measuring
range is not limited and corresponds to that of the operational measurement.
The unit format of the measured values on the device side is at first automatically
generated by means of the selected nominal values of current and voltage within the
system data.
The current unit format can be determined in DIGSI or at the device via the 'Opera-
tional measured values' menu.
You can select via DIGSI which operational measured values (primary, secondary or
percentage) are to be transmitted.
The measured values are always transmitted as 16-bit values including sign (range ±
32768). You can define the scaling of the operational measured value to be trans-
mitted. This will result in the respective transmittable measuring range.
For further details, please refer to the descriptions and protocol profiles.
Parameter
FullScaleVolt.
FullScaleCurr.
Functions
2.26 Auxiliary Functions
Adresse
1101
1101
A–B
373