ABB REG316 4 Series Operating Instructions Manual page 147

REG 316*4 1MRB520049-Uen / Rev. F
I
2
I
2
0
In cases where both stages are used for tripping, the one with
the higher setting must be faster.
Compensating the frequently differing rated currents of generator
and c.t's is also recommended for the NPS protection. The
corresponding compensated setting is given by
Setting = calculated setting
Typical settings:
1st. stage (alarm)
I2-Setting
Delay
2nd. stage (tripping)
I2-Setting
Delay
Tripping stage
Alarm stage
t
I
GN
I
N1
0.1 I
N
5 s
0.15 I
N
10 s
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