3 Operation
(continued)
3-146 C232-302-401/402/403/404-603 / C232/EN M/A23
Time control for direct
motor control with external
command termination
For bay types that are defined for direct motor control, it is possible to intervene in the
control sequence of motor-operated switchgear units by way of external terminating
contacts. To do so, the user must set the C232 by selecting ‘Yes’ at MAIN: W. ext.
cmd. termin. and must configure binary signal inputs for connection to terminating
contacts.
As the ’Open’ or ‘Close’ control command is transmitted, the output relay configured for
‘motor relay’ will be triggered. At the same time, the C232 starts a set monitoring time,
during which the status signal of the motor relay needs to be issued. If this is not the
case then the control command and the output relays configured for ‘motor relay’ will be
reset. Furthermore, a signal will be sent to substation control level.
If the status signal of the motor relay starts within the monitoring time, the running time
monitoring of the switchgear unit is started with the status signal of the motor relay. The
monitoring of the control command will then be carried out as for electromechanically
operated switchgear units.
The motor relay is reset if the external termination command is issued while the
switchgear unit’s running time monitoring function is elapsing or during the latching time.
Once the latching time has elapsed, the motor relay is reset in any case. As the motor
relay is reset, the monitoring time of the motor relay is restarted. Once this monitoring
time has elapsed, the control commands ‘Open’ or ‘Close’ will be terminated.
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