ABB RED650, Technical Manual

Page: 163 / 926

Name Type Values (Range) Unit Description
UL1 REAL - kV Voltage in phase L1
UL2 REAL - kV Voltage in phase L2
UL3 REAL - kV Voltage in phase L3
7.3.7 Operation principle
SEMOD153665-4 v8
The automatic switch onto fault logic ZCVPSOF can be activated externally (by
the breaker-closed input) or internally (automatically) with the dead-line detection
using the UI level-based logic. When the setting
AutoInitMode is DLD disabled ,
ZCVPSOF is activated by an external binary input
BC
. When the setting
AutoInitMode is set to Voltage , Current or Current & Voltage modes, ZCVPSOF is
activated by the dead-line detection.
The activation from the dead-line detection function is released if the internal
signal
DeadLine
from the UILevel Detector function is activated at the same
time as the inputs
ZACC
and
START_DLYD
are not activated at least for the
duration of tDLD . The internal signal
DeadLine
from the UILevel Detector
function is activated under any of the following conditions:
• If all three-phase currents are below the setting IPh< and the AutoInitMode
setting is set to Current
• If all three-phase voltages are below the setting UPh< and the AutoInitMode
setting is set to Voltage
• If all three-phase currents and voltages are below the settings IPh< and UPh<
and the AutoInitMode setting is set to Current & Voltage
Once the dead line drops off after energization or once
BC
drops off, the activated
signal is extended for the duration of tSOTF .
The internal signal
SOTFUILevel
is activated if the phase voltage is below the
set UPh< and the corresponding phase current is above the set IPh< for a time
longer than the duration set by tDuration .
To get the
TRIP
signal, one of the different operate modes must also be selected
with the Mode parameter:
• Mode = Impedance ;
TRIP
is released if either the
ZACC
input (connected
normally to a nondirectional distance protection start zone) or the
START_DLYD
input is activated. If
START_DLD
is activated,
TRIP
is
released after a delay of tOperate .
• Mode = UILevel ;
TRIP
is released if UILevel detector is activated
• Mode = UILvl&Imp ;
TRIP
is released based either on the impedance-
measured criteria or UILevel detection
The ZCVPSOF function can be blocked by activating the input
BLOCK
.
1MRK 505 394-UEN A
Section 7
Impedance protection
Line differential protection RED650 2.2 IEC 157
Technical manual