Siemens SIRIUS 3RF Series

SIRIUS 3RA28 function modules for mounting on 3RT2 contactors
7.5 Configuration
SIRIUS Innovations
System Manual, 01/2011, A8E56203870002-03
657
3RA2813
Q
L1(+)
N(-)
S1
A2
A1
16
18
15
A
1/A2
15/18
15/16
t
Q
L1(+)
N(-)
S1
A2
A1
36
28
27 35
A
1/A2
27/28
35/36
t
The 3RA2813 solid-state time-delay auxiliary switch has the following features:
● The voltage is supplied through the plug-in contacts directly via the contactor's coil
terminals, parallel to A1/A2.
● The timing function is activated by switching on the contactor on which the delayed
auxiliary switch is mounted.
● A varistor is integrated in the solid-state time-delay auxiliary switch to attenuate contactor
coil switching overvoltages.
3RA2814
Q
L1(+)
N(-)
S1
A3
A2
A1 = B1
16
18
15
A
3/A2
15/18
15/16
t
B1/A2
≥ 35 ms
Q
S1
L1(+)
N(-)
A3
A2
A1 = B1
36
28
27 35
A
3/A2
27/28
35/36
t
B1/A2
≥ 35 ms
The 3RA2814 solid-state time-delay auxiliary switch has the following features:
● Voltage is supplied directly through plug-in contact A2 through the contactor's coil
terminals and terminal A3 on the timing relay.
● The timing function is activated by switching on the contactor on which the delayed
auxiliary switch is mounted, via A1 on the contactor coil.
● The 3RA2814 works with auxiliary voltage.
● The minimum ON duration at the start contact is 35 ms.
● A varistor is integrated in the solid-state time-delay auxiliary switch to attenuate contactor
coil switching overvoltages.