3 Operation
(continued)
C232-302-401/402/403/404-603 / C232/EN M/A23 3-145
Time control for direct
motor control
The control sequence applied above applies to all switchgear units operated via an
‘Open’ - or ‘Close’ - contact. For bays with direct motor control of switch disconnectors,
disconnectors or grounding switches, the following modified control sequence described
below applies to the motor-operated switchgear units. The List of Bay Types shows
which bay types are defined for direct motor control. In the chapter on ‘Installation and
Connection’, an example for the connection of a bay with direct motor control is
illustrated.
If a bay type with direct motor control is selected, a binary input for the status signal of
the motor relay and one output relay each for triggering the motor relay and the shunt
windings will be configured. In the example illustrated in Figure 3-112, the single-pole
command CMD_1: Command C012 is defined for control of the motor relay, the
single-pole command CMD_1: Command C011 is defined for control of the shunt
windings. The single-pole signal SIG_1: Signal S012 (debounced and conditioned
by chatter suppression) is defined for the status signal of the motor relay.
As the control command -’Open’ or ‘Close’ - is transmitted, the output relays configured
for ‘motor relay’ and ‘shunt winding’ are 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’ and ‘shunt winding’ 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.
As soon as the status signal - 'Open' or 'Closed' is issued or at the end of the running
time monitoring of the switchgear unit, the motor relay is reset - once the set latching
time has elapsed (see also Figure 3-106). 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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