Siemens 6MD85, Manual

Page: 195 / 1256

In the detail configuration of the interface, you define:
•
Which operate indications of the protection functions go into the generation of the trip command
•
Which protection functions start the automatic reclosing function
•
Which protection functions start the Circuit-breaker failure protection function
If you are using an application template, the function groups are already connected to each other, because
this connection is absolutely essential to ensure proper operation. You can modify the connection in DIGSI 5
via the Function-group connections Editor.
You can find more detailed information in chapter
2.1 Function Embedding in the Device .
If the connection is missing, DIGSI 5 reports an inconsistency.
Protected Object/Equipment Data (FB General)
The rated voltage and rated current as well as the neutral-point treatment of the protected object or the
equipment are defined here. These data apply to all functions in the Voltage-current 3-phase function group.
Equipment Data
The rated voltage and rated current as well as the neutral-point treatment of the object or the equipment are
defined here. These data apply to all functions in the Voltage-current 3-phase function group.
Resetting the LED Group
Using the Reset the LED group function, you can reset the stored LEDs of the functions in one specific func-
tion group while the activated, stored LEDs of other functions in other function groups remain activated.
You can find more detailed information in chapter
3.1.10 Resetting Stored Indications of the Function Group .
Process Monitor
The process monitor is always present in the Voltage-current 3-phase function group and cannot be
removed.
The process monitor provides the following information in the Voltage-current 3-phase function group:
•
Current-flow criterion:
Detection of an open/activated protected object/equipment based on the flow of leakage current
•
Closure detection:
Detection of the switching on of the protected object/equipment
•
Cold-load pickup detection (optional, only for protection devices):
These data apply to all functions in the Voltage-current 3-phase function group.
The description of the process monitor begins in chapter
5.8 Process Monitor .
Operational Measured Values
The operational measured values are always present in the Voltage-current 3-phase function group and
cannot be removed.
The following table shows the operational measured values of the Voltage-current 3-phase function group:
Table 5-1 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
I
NS
Sensitive ground current A mA Rated operating current of the primary values
V
A
, V
B
, V
C
Phase-to-ground voltages kV V Operating rated voltage of primary values/√3
Function-Group Types
5.2 Function-Group Type Voltage/current 3-Phase
SIPROTEC 5, High-Voltage Bay Controller, Manual 195
C53000-G5040-C015-9, Edition 11.2017