Siemens SIRIUS 3RT Series System Manual page 657

3RA2813
L1(+)
N(-)
L1(+)
N(-)
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
L1(+)
N(-)
L1(+)
N(-)
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.
SIRIUS Innovations
System Manual, 01/2011, A8E56203870002-03
SIRIUS 3RA28 function modules for mounting on 3RT2 contactors
S1
A1
15
Q
16 18
A2
S1
A1
27 35
Q
28 36
A2
S1
A3
A1 = B1
15
Q
16 18
A2
S1
A3
A1 = B1
27 35
Q
28 36
A2
A1/A2
15/18
15/16
t
A1/A2
27/28
35/36
t
A3/A2
B1/A2
≥ 35 ms
15/18
15/16
t
A3/A2
B1/A2
≥ 35 ms
27/28
35/36
t
7.5 Configuration
657