Siemens 7SJ82 Manual page 231

Interfaces to the Circuit-Breaker Function Group
The interface with the Circuit-breaker function group is used to exchange all required data between the
protection function group and the Circuit-breaker function group. The following data is required:
•
Pickup and operate indications of the protection functions in the direction of the Circuit-breaker function
group
•
Information on the circuit-breaker condition in the direction of the Protection function groups
You can connect the Capacitor bank side function group to one or more Circuit-breaker function groups.
This connection determines the following:
•
Which circuit breakers are activated by the protection functions of the Capacitor bank side function
group
•
Start of the Circuit-breaker failure protection function, if available in the Circuit-breaker function
group, through the protection functions of the connected Capacitor bank side function group
Besides the general assignment of the Capacitor bank side function group to the Circuit-breaker function
group, you can also configure the interface for certain functionalities in detail. Configure the details in DIGSI 5
using the Circuit-breaker interaction Editor in the Capacitor bank side function group.
For the detail configuration of the interface, define the following:
•
Which operate indications of the protection functions are included when the trip command is generated
•
Which protection functions activate the Circuit-breaker failure protection function
If an application template is used, the function groups are connected to each other because this link is abso-
lutely essential to ensure proper operation. You can modify the connection in DIGSI 5 via the Function-group
connections Editor. If the connection is missing, DIGSI 5 reports an inconsistency.
You can find more detailed information in chapter
Interface with Protection Communication (optional)
All required data is exchanged between the protection function group and the protection communication via
the interface with Protection communication, for example:
•
Binary signals
•
Measured values
•
Complex data
You can find more detailed information in chapter
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.
Process Monitor
The process monitor is always present in the Capacitor bank side function group and cannot be removed. The
process monitor provides the following information in the Capacitor bank side function group:
•
Current-flow criterion:
Detection of an open/activated capacitor bank side based on the flow of leakage current
•
Closure detection:
Detection of closure of the capacitor bank side
•
Cold-load pickup detection (optional):
This information is in the Capacitor bank side function group and is available to all the functions in the func-
tion group.
SIPROTEC 5, Overcurrent Protection, Manual
C53000-G5040-C017-8, Edition 07.2017
5.5 Function-Group Type Capacitor Bank Differential Protection
2.1 Function Embedding in the
3.5 Protection Communication.
Function-Group Types
Device.
231