Woodward SEG HighPROTEC MRA4, Руководство по эксплуатации устройства, Страница: 232 / 510

Field Parameters
CT sec Nominal current of the
secondary side of the current
transformers.
1A,
5A
1A [Field Para]
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 a wrong
polarity, the wiring error can
be compensated by this
parameter. This parameter
turns the current vectors by
180 degrees.
0°,
180°
0° [Field Para]
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 1000A [Field Para]
ECT sec This parameter defines the
secondary nominal current of
the connected earth current
transformer. If the earth
current is done via the
Holmgreen connection, the
primary value of the phase
current transformer must be
entered here.
1A,
5A
1A [Field Para]
ECT dir Earth fault protection with
directional feature depends
also on the correct wiring of
the earth current transformer.
A wrong polarity/wiring can be
corrected by means of the
settings "0°" or "180°". The
operator has the possibility of
turning the current vector by
180 degrees (change of sign)
without modification of the
wiring. This means, that – in
terms of figures - the
determined current indicator
was turned by 180° by the
device.
0°,
180°
0° [Field Para]
Page 232 EN MRA4 04/09