Functions
2.4 Backup Overcurrent
SIPROTEC, 7SD80, Manual
E50417-G1140-C474-A1, Release date 09.2011
89
2.4.4 Setting Notes
General
The setting notes described in the following apply to non-directional and directional overcurrent protection.
Operating Modes
You set the operating mode of the overcurrent protection elements specifically for each element. The setting
applies collectively to the corresponding phase and ground element.
50-1, 3I0> address 2620
50-2, 3I0>> address 2610
50N, 3I0p address 2630
50-3, 3I0>>> address 2650
The following settings are possible:
• If set to ON, the time overcurrent protection operates independently of the other protection functions as
backup overcurrent protection.
• If set to Only Emer. prot, the overcurrent protection operates as emergency function.
•Set to OFF, the element is disabled.
Direction
The elements 50-1, 50-2 and 50N operate directionally and non-directionally.
The direction is set specifically for each element. The setting applies collectively to the corresponding phase
and ground element.
50-1, 3I0> address 2621
50-2, 3I0>> address 2611
50N, 3I0p address 2631
The following settings are possible:
• Non-Directional
• Forward
• Reverse
The operating mode of the directional element in the event of measuring voltage failure is set specifically for
each element. The setting applies collectively to the corresponding phase and ground element.
50-1, 3I0> address 2622
50-2, 3I0>> address 2612
50N, 3I0p address 2632
The following settings are possible:
• Non-Directional
• BLOCKED
The 50-3 element always operates non-directionally.
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