ABB RED615 Technical Manual page 692

Section 9
Control functions
686
control module has not removed the external command signal after the closing
operation. To avoid unnecessary alarms, the duration of the command signal
should be set in such a way that the maximum length of the signal is always below
Maximum Syn time + 5s.
Maximum Syn time
GUID-4DF3366D-33B9-48B5-8EB4-692D98016753 V2 EN
Figure 369: Determination of the alarm limit for a still-active command signal
Closing is permitted during Maximum Syn time, starting from the moment the
external command signal CL_COMMAND is activated. The CL_COMMAND input
must be kept active for the whole time that the closing conditions are waited to be
fulfilled. Otherwise, the procedure is cancelled. If the closing-command conditions
are fulfilled during Maximum Syn time, a closing pulse is delivered to the circuit
breaker. If the closing conditions are not fulfilled during the checking time, the
alarm CL_FAIL_AL is activated as an indication of a failed closing attempt. The
closing pulse is not delivered if the closing conditions become valid after Maximum
Syn time has elapsed. The closing pulse is delivered only once for each activated
external command signal, and a new closing-command sequence cannot be started
until the external command signal is reset and reactivated again. The
SYNC_INPRO output is active when the closing-command sequence is in progress
and it is reset when the CL_COMMAND input is reset or Maximum Syn time has elapsed.
Bypass mode
SECRSYN can be set into bypass mode by setting the parameters Synchro check
mode and Energizing check mode to "Off" or alternatively, by activating the
BYPASS input.
In the bypass mode, the closing conditions are always considered to be fulfilled by
the SECRSYN function. Otherwise, the operation is similar to the normal mode.
Close pulse
5s
1YHT530004D05 D
615 series
Technical Manual