Woodward MRM4, Manual

Page: 317 / 460

Protective Elements
Parameter Description Setting range Default Menu path
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>
/I-Prot
/I2>[1]]
Blo TripCmd Permanent blocking of
the Trip Command of the
module/stage. inactive,
active
inactive [Protection Para
/<n>
/I-Prot
/I2>[1]]
ExBlo TripCmd 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
TripCmd Fc=active". inactive,
active
inactive [Protection Para
/<n>
/I-Prot
/I2>[1]]
I2> The Threshold setting
defines a minimum
operating current
magnitude of I2 for the 46
function to operate, which
ensures that the relay
has a solid basis for
initiating a current
unbalance trip. This is a
supervisory function and
not a trip level. 0.01 - 4.00In 0.01In [Protection Para
/<n>
/I-Prot
/I2>[1]]
%(I2/I1) The %(I2/I1) setting is the
unbalance trip pickup
setting. It is defined by
the ratio of negative
sequence current to
positive sequence current
(% Unbalance=I2/I1), or
%(I2/I1) for ABC rotation
and %(I1/I2) for ACB
rotation. inactive,
active
inactive [Protection Para
/<n>
/I-Prot
/I2>[1]]
EN MRM4 01/11 Page 317