Siemens 6MD85, Manual

Page: 1042 / 1256

Energy Values
Function Description of Energy Values
The device continually determines the values for the active and reactive energy from the power-measured
values. It calculates the exported and imported electrical energy. The calculation (summation over time)
begins immediately after the device startup. You can read the present energy values on the device display or
through DIGSI, delete the energy value (set to 0), or set it to any initial value. After input, the energy-value
calculation will continue with the new setting values.
Energy values can be transferred to a control center through an interface. The energy values are converted
into energy metered values. Here the following applies:
[foomverg-020311-01.tif, 1, en_US]
Through the settings, you set how the metered values are processed. The setting parameters apply for all
energy metered values of the device, and do not have a function-group specific effect. You determine the
following points:
•
Parameter
Energy restore time
Hour-related point in time; at this point in time, the device will provide a metered value at the communi-
cation interface for transmission. After this, it will be transferred in accordance with the selected log.
Note: If the parameter is activated through a time setting, the parameter
Energy restore interval
will be deactivated automatically.
•
Parameter
Energy restore interval
Adjustable period in minutes until the first and every further transfer of the metered value to the commu-
nication interface of the device. After this, it will be transferred in accordance with the selected log.
Note: The transfer interval is used alternatively to the transfer time, and deactivates the set transfer time.
The display of the device is always up to date.
You will find these parameters in the device settings under measured values.
In addition, restoring can be triggered via a routable binary input (
>Restoring
). The rising edge of the binary
input leads to restoring, that is, provision of the energy-metered value at the communication interface.
The metered-value memory and the energy values can be set to 0 via a binary input (
>Resetting
) if there is
a rising edge.
Note: The binary inputs affect all energy/energy metered values simultaneously.
The following energy values are available:
Energy Values Primary
Wp+ Active energy, output kWh, MWh, GWh
Wp- Active energy, input kWh, MWh, GWh
Wq+ Reactive energy, output kvarh, Mvarh, Gvarh
Wq- Reactive energy, input kvarh, Mvarh, Gvarh
In compliance with IEC 61850, when individually measured values are missing, the quality of the energy-
metered values changes to the state Questionable.
This quality state is retained until a new meter content is specified for the energy value by:
- Confirmation of the current meter content via Set
- Setting a new counter status
- Resetting the counter status to 0
9.9
9.9.1
Measured Values, Energy Values, and Supervision of the Primary System
9.9 Energy Values
1042 SIPROTEC 5, High-Voltage Bay Controller, Manual
C53000-G5040-C015-9, Edition 11.2017