ABB RED615 Technical Manual page 691

1YHT530004D05 D
615 series
Technical Manual
GUID-0D9A1A7F-58D1-4081-B974-A3CE10DEC5AF V2 EN
Figure 367: Determination of the pulse length of the closing signal
In the command control mode operation, there are alarms for a failed closing
attempt (CL_FAIL_AL) and for a command signal that remains active too long
(CMD_FAIL_AL).
If the conditions for closing are not fulfilled within the set time of Maximum Syn
time, a failed closing attempt alarm is given. The CL_FAIL_AL alarm output
signal is pulse-shaped and the pulse length is 500 ms. If the external command
signal is removed too early, that is, before conditions are fulfilled and the closing
pulse is given, the alarm timer is reset.
GUID-FA8ADA22-6A90-4637-AA1C-714B1D0DD2CF V2 EN
Figure 368: Determination of the checking time for closing
The control module receives information about the circuit breaker status and thus is
able to adjust the command signal to be delivered to the Synchro check function. If
the external command signal CL_COMMAND is kept active longer than
necessary, CMD_FAIL_AL alarm output is activated. The alarm indicates that the
t = Close pulse
Maximum Syn time
Section 9
Control functions
685