Parameter Settings - Siemens SIPROTEC easy 7SJ45 Handbuch

Manual 7SJ45
"ENTER" key to activate the modified settings. The "ERROR"
LED now stops blinking.
The following types of inverse overcurrent protection
characteristics can be selected:
Characteristics according to IEC Characteristics according to
N INV Normal inverse
V INV Very inverse
E INV Extremely inverse
The characteristics of the overcurrent protection can be found in
the section Technical Data (Figure 2-11 to Figure 2-20).
If the operating mode IEC 51 or ANSI 51 is selected, the white
marking applies for the parameter settings!
C53000-K1174-C001-7
ANSI
M INV Moderately inverse
V INV Very inverse
E INV Extremely inverse
Table 2-1 Setting examples of the MODE switches
60 Hz
FREQ. 50 Hz
IE
MODE I>>
N INV
DT O/C
IEC 51 V INV
50/51
E INV
FREQ. 50 Hz
60 Hz
IE
MODE I>>
N INV
DT O/C
IEC 51 V INV
50/51
E INV

2.7.2 Parameter settings

The values that can be set are determined by the basic device
setting selected on the Basic Settings Block. The following table
shows the parameter allocation in dependence on the variant
ordered and the operating mode selected by the MODE switch:
Settings
These settings mean:
Device set to 50 Hz rated
frequency
Evaluation of calculated IE
Operating mode: definite-time
overcurrent protection
These settings mean:
Device set to 50 Hz rated
frequency
High-current stage active
Operating mode: inverse-time
overcurrent protection,
characteristic type: Very
inverse
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