Woodward MRM4, Manual

Page: 234 / 460

Field Parameters
Field Parameters
Field Para
Within the field parameters you can set all parameters, that are relevant for the primary side and the mains
operational method like frequency, primary and secondary values and the star point treatment.
General Field Parameters
Parameter Description Setting range Default Menu path
Phase Sequence Phase Sequence
direction ABC,
ACB
ABC [Field Para
/General settings]
f Nominal frequency 50Hz,
60Hz
50Hz [Field Para
/General settings]
Field Parameters – Current Related
Parameter Description Setting range Default Menu path
CT pri Nominal current of the
primary side of the
current transformers. 1 - 50000A 10A [Field Para
/Current transf]
CT sec Nominal current of the
secondary side of the
current transformers. 1A,
5A
1A [Field Para
/Current transf]
CT dir Protection functions with
directional feature can
only work properly if the
connection of the current
transformers is free of
wiring errors. If all
current transformers are
connected to the device
with an incorrect polarity,
the wiring error can be
compensated by this
parameter. This
parameter turns the
current vectors by 180
degrees. 0°,
180°
0° [Field Para
/Current transf]
ECT pri This parameter defines
the primary nominal
current of the connected
earth current transformer.
If the earth current is
measured via the
Holmgreen connection,
the primary value of the
phase current
transformer must be
entered here. 1 - 50000A 50A [Field Para
/Current transf]
Page 234 EN MRM4 01/11