Woodward MRM4, Manual

Page: 405 / 460

Supervision
Setting Group Parameters of the CBF
In order to prevent a faulty activation of the BF Module, the pickup (alarm)
time must be greater than the sum of:
•
The close-open time of the breaker (please refer to the technical data of
the manufacturer of the breaker);
•
+ The tripping delay of the device (please refer to the Technical Data
section);
•
+ The security margin; and
•
+ The operating time.
Parameter Description Setting range Default Menu path
Function Permanent activation or
deactivation of
module/stage. inactive,
active
inactive [Protection Para
/<n>
/Supervision
/CBF]
ExBlo Fc Activate (allow) or
inactivate (disallow)
blocking of the
module/stage. This
parameter is only
effective if a signal is
assigned to the
corresponding global
protection parameter. If
the signal becomes true,
those modules/stages
are blocked that are
parametrized "ExBlo
Fc=active". inactive,
active
inactive [Protection Para
/<n>
/Supervision
/CBF]
I-CBF > Current level that needs
to exist after Trip
Command has been
given. 0.00 - 0.10In 0.00In [Protection Para
/<n>
/Supervision
/CBF]
t-CBF If the delay time is
expired, an CBF alarm is
given out. 0.00 - 10.00s 0.20s [Protection Para
/<n>
/Supervision
/CBF]
EN MRM4 01/11 Page 405