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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.