ABB RED650 Applications Manual

7.3.3 Setting guidelines
M13855-4 v10
The parameters for automatic switch onto fault logic, voltage- and current-based
function ZCVPSOF are set via the local HMI or Protection and Control Manager
PCM600.
The distance protection zone used for instantaneous trip by ZCVPSOF has to be set
to cover the entire protected line with a safety margin of minimum 20%.
Common base IED values for primary current (IBase), primary voltage (UBase)
and primary power (SBase) are set in the global base values for settings function
GBASVAL.
GlobalBaseSel is used to select GBASVAL for reference of base values.
Operation: The operation of ZCVPSOF is by default set to On. The parameter must
be set to Off if ZCVPSOF is not to be used.
IPh< is used to set the current level for the detection of a dead line. IPh< is, by
default, set to 20% of IBase. It shall be set with a sufficient margin (15–20%)
below the minimum expected load current. In many cases, the minimum load
current of a line is close to zero and even can be zero. The operating value must
exceed the maximum charging current of an overhead line when only one phase is
disconnected (mutual coupling in the other phases).
UPh< is used to set the voltage level for the detection of a dead line. UPh< is, by
default, set to 70% of UBase. This is a suitable setting in most cases, but it is
recommended to check the suitability in the actual application.
AutoInitMode: automatic activating of ZCVPSOF is, by default, set to DLD
disabled, which means the dead-line logic detection is disabled. If an automatic
activation of the dead-line detection is required, the parameter AutoInitMode has to
be set to either Voltage, Current or Current & Voltage.
When AutoInitMode is set to Voltage, the dead-line detection logic checks that the
three-phase voltages are lower than the set UPh< level.
When AutoInitMode is set to Current, the dead-line detection logic checks if the
three-phase currents are lower than the set IPh< level.
When AutoInitMode is set to Current & Voltage, the dead-line detection logic
checks that both three-phase currents and three-phase voltages are lower than the
set IPh< and UPh< levels.
Otherwise, the logic is activated by an external BC input.
tSOTF: the drop delay of ZCVPSOF is, by default, set to 1.0 seconds, which is
suitable for most applications.
Section 7 1MRK 505 393-UEN B
Impedance protection
144 Line differential protection RED650 2.2 IEC
Application manual

ABB RED650 Specifications

General

Brand	ABB
Model	RED650
Category	Protection Device
Language	English