Siemens SIPROTEC easy 7SJ45 Handbuch Seite 48

Manual 7SJ45
there is a dead time of 500 ms. The time can be prolonged for
extremely low fault currents.
•
Versions with relay output
These devices can be fitted in conventional types of switch-
gear. The auxiliary trip transformer in the current transformer
circuit or another power source can be used as power supply
source for the trip coil (see Figure 2-24 to Figure 2-26 and see
ordering data and accessories in chapter 2.11).
In case there is a fault tripping will be carried out for at least
500 ms. When a switching operation is carried out the trip
command remains in a waiting state until the circuit-breaker
trips.
Housing
The device is available for
•
Panel flush mounting and
•
Standard rail mounting
The housings of the 7SJ45 devices are dimensioned to fit into
most existing panel cutouts.
In the condensation-proof version, the module inside the device
is sealed with protective lacquer, so that the device can be used
even in very rough and extremely humid environmental
conditions.
C53000-K1174-C001-7
Front view
TRIP
1
FREQ. 50 Hz
MODE I>>
N INV
IEC 51 V INV
E INV
16
I>>
8
MIN 2
4
MAX 20/
2
I>>
1 MIN 2
0.5
MAX 20/
0.8
TI>>
0.4
MIN 0
0.2 MAX 1.575
0.1
TI>>
0.05 MIN 0
0.025 MAX 1.575
3.2
Ip
1.6 MIN 0.8/1.3
MAX 4/
0.8
0.4
I>
0.2
MIN 0.8/1.3
0.1 MAX 6.2/
1.6
TIp
MIN 0.05
0.8
0.4 MAX 3.15
0.2
TI>
0.1 MIN 0
0.05 MAX 6.3
: PULSE OUTPUT/CONTACT OUTPUT
*
Figure 2-1 Device front with indication and control elements
7SJ45
Construction
SIPROTEC 7SJ4
2
RUN ERROR
3
ENTER
-
60 Hz
IE
SW1
DT O/C
50/51
16
8
. 4
[I/I ] N
SW2
2
1
0.5
.
0.8
0.4
0.2
[s] SW3
0.1
0.05
0.025
3.2
1.6
*
.
0.8
[I/I ] N SW4
0.4
0.2
*
. 0.1
3.2
1.6
0.8
SW5
[s]
0.4
0.2
0.1
4
48