Siemens SIRIUS 3RH Series, System Manual

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SIRIUS 3RA28 function modules for mounting on 3RT2 contactors
7.8 Operation
SIRIUS Innovations
System Manual, 01/2011, A8E56203870002-03
673
7.8 Operation
7.8.1 Setting the times
Setting options for function modules
On function modules for direct-on-line start (solid-state timing relays with semiconductor
output/solid-state time-delay auxiliary switches), use the time range selector switch to set the
time base to 1 s, 10 s or 100 s. Use the operating time adjustment switch to set the relative
time between 5 and 100%
(to support operating times between 0.05 s and 100 s).
On the function module for star-delta (wye-delta) start, you can preset the dead interval from
star to delta operation to10 s, 30 s or 60 s and the operating time to between 0.5 s and 60 s
(using the adjustment switch). The changeover delay from star (wye) to delta operation is set
to a non-adjustable value of 50 ms.
1 Time range selector switch (1 s, 10 s, 100 s or 10 s, 30 s, 60 s)
2 Operating time adjustment switch (5 to 100%)
Example time setting
Time base on time range selector switch = 100 s, relative time on operating time adjustment
switch = 50%:
This results in an operating time of 50 s.