Siemens SIPROTEC easy 7SJ45 - Overcurrent Protection Setting Ranges

Manual 7SJ45 Technical Data
C53000-K1174-C001-7 70
Overcurrent protection
Setting ranges / increments for definite-time protection
(DT O/C 50/51)
The set times are pure delay times.
Setting ranges / increments for inverse-time protection
(IEC 51 or ANSI 51)
Pickup current I>> (phases) 2 I
N
to 20 I
N
or ineffective,
increments 0.5 I
N
Pickup current I> (phases);
three-phase supply;
see Note
0.5 to 6.2 I
N
or ineffective, increments 0.1 I
N
Pickup current IE>
(earth calculated);
three-phase supply;
see Note
0.5 to 6.2 I
N
or ineffective, increments 0.1 I
N
Delay times T I>> 0 to 1575 ms, increments 25 ms
Delay times T I> 0 to 6300 ms, increments 100 ms
Pickup current Ip (phases);
three-phase supply;
see Note
0.5 I
N
to 4 I
N
or ineffective, increments 0.1 I
N
Pickup current IEp> (earth
calculated);
three-phase supply;
see Note
0.5 I
N
to 4 I
N
or ineffective, increments 0.1 I
N
Delay times T Ip (IEC) 0.05 to 3.15 s,
increments 0.05 s
Delay times D (ANSI) 0.5 to 15.00 s,
increments 0.25 s
Note!
The device allows minimum setting values of 0.5 I
N
(three-phase supply).
With single-phase supply, please observe the minimum setting values of
0.8 I
N
(7SJ45XX-0*) or 1.3 I
N
(7SJ45XX-1*) printed on the front panel.
WARNING!
When setting the parameters, note that the maximum thermal overload
capability of the current path is 2 I
N
.