Siemens 6MD86 - Group Indications of Overcurrent Protection Functions; Description

Group Indications of Overcurrent Protection Functions
Description
The function block Group indications of the overcurrent protection functions uses the pickup and operate
indications of the following functions:
•
Overcurrent protection, phases
•
Overcurrent protection, ground
•
Directional overcurrent protection, phases
•
Directional overcurrent protection, ground
•
Ground-fault protection for high-impedance ground faults in grounded systems
•
Instantaneous high-current tripping
The group indications of the overcurrent protection are generated by a logical OR of the stage-selective pickup
and operate indications of the functions listed above (see also Figure 7-126):
•
Pickup
•
Operate
The pickup and operate indications are output, where present, with direction information.
[loocgrin-240112-01.tif, 3, en_US]
Figure 7-126
Logic Diagram of the Overcurrent Protection Group Indications
7.9
7.9.1
Protection and Automation Functions
7.9 Group Indications of Overcurrent Protection Functions
SIPROTEC 5, High-Voltage Bay Controller, Manual 759
C53000-G5040-C015-9, Edition 11.2017