Woodward SEG HighPROTEC MRA4, Device Manual

Page: 450 / 510

CBF-Supervision Module – Circuit Breaker Failure Protection [ANSI 50BF]
Setting Group Parameters of the CBF Module
In order to prevent a faulty activation of the CBF-Module the alarm time
must be greater than the sum of:
•
Close-open-time of the circuit breaker (please refer to Technical Data of
the manufacturer of the circuit Breaker)
•
+ Tripping delay of the device (please refer to Technical Data)
•
+ Security margin
•
+ 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
parameterized
"ExBlo Fc=active".
inactive,
active
inactive [Protection Para
/<n>
/Supervision
/CBF]
I-CBF > If the pick-up value is
exceeded, the
module/stage will be
started.
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]
Page 450 EN MRA4 04/09