3Ra28 Function Modules - Siemens SIRIUS 3RT2 Manual

Product description

3.4 3RA28 function modules

3.4 3RA28 function modules
Function module for direct-on-line start (electronic timing relays with semiconductor output/solid-state
time-delay auxiliary switches)
1
2
3
4
5
Figure 3-2
Function module for star-delta (wye-delta) start
The function module for star-delta (wye-delta) start comprises a basic module with integrated
control logic and two coupling modules of the same type.
1 Basic module with integrated control logic
2 Coupling module
3 Coil control:
4 Ribbon cable:
5 Slot for connecting cable:
6 Time range selector switch:
7 Operating time adjustment switch:
8 Mechanical plunger:
Figure 3-3
24
Timing relay attachment
Time range selector switch:
Operating time adjustment switch:
Mechanical plunger:
Screw/spring-loaded terminals:
Electronic timing relays with semiconductor output/solid-state time-delay auxiliary
switches
Basic module and coupling modules for the contactor assembly for star-delta (wye-delta)
start
Sets the time base (1 s, 10 s, 100 s)
Sets the relative time (5 to 100%)
Indicates the switching state of the contactor
The terminals are available as both screw-type and
spring-loaded connections.
Basic module: Voltage measurement at the line contactor
Coupling module: Controls the contactor below
Electrical connection of modules
Routes the supply voltage and electrical interlock
Sets the time base (10 s, 30 s, 60 s)
Sets the relative time (5 to 100%)
Indicates the switching state of the contactor
SIRIUS 3RA28 function modules for mounting on 3RT2 contactors
Manual, 02/2019, A5E03656507620A/RS-AD/005