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50-2, 3I0>>
50N, 3I0p
50-3, 3I0>>>
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.
•
If 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>
50-2, 3I0>>
50N, 3I0p
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>
50-2, 3I0>>
50N, 3I0p
The following settings are possible:
•
Non-Directional
•
BLOCKED
The 50-3 element always operates non-directionally.
Inrush Blocking
You can specify for each element of the overcurrent protection whether the element will be blocked when
inrush is detected. The setting applies collectively to the corresponding phase and ground element.
50-1, 3I0>
50-2, 3I0>>
50N, 3I0p
50-3, 3I0>>>
Pickup Values
The elements can be combined. The pickup values are determined by the type of protected object.
The pickup values are set specifically for each element:
50-B2 PICKUP, 67-B2 PICKUP
50N-B2 PICKUP, 67N-B2 PICKUP
50-B1 PICKUP, 67-B1 PICKUP
50N-B1 PICKUP, 67N-B1 PICKUP
SIPROTEC 4, 7SD80, Manual
E50417-G1100-C474-A2, Edition 02.2018
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Functions
2.4 Backup overcurrent
83
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