Siemens 3RP25 Manual page 62

Single function devices
6.7 Star-delta (wye-delta) function with coasting time (idling)
Operation 3
Start contact B1 closes while the star time runs.
If the control signal B1 is applied again during the star time, idling time starts and the timing
is terminated normally.
Operation 4
Start contact B1 opens while delta time is running and is applied again.
If the control signal on B1 is applied again during delta time and switched off again although
the idling time has not yet elapsed, the idling time (coasting time) is reset to zero. If the
control signal is reapplied to B1, the idling time is restarted.
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Manual, 09/2019, A5E31947765002A/RS-AC/003
3RP25 Time Relays