Setting Guidelines - ABB REL670 2.2 IEC Applications Manual

1MRK 506 369-UEN B
9.14.3
9.14.3.1
Line distance protection REL670 2.2 IEC
Application manual
regulator is out of service. In such cases, to ensure tripping under such conditions,
overcurrent protection with undervoltage seal-in can be used.
To apply the VRPVOC function, the configuration is done according to figure 286.
As seen in the figure, the pickup of the overcurrent stage will enable the
undervoltage stage. Once enabled, the undervoltage stage will start a timer, which
causes function tripping, if the voltage does not recover above the set value. To
ensure a proper reset, the function is blocked two seconds after the trip signal is
issued.
OR
OR
IEC12000183 V1 EN-US
Figure 286: Undervoltage seal-in of current start

Setting guidelines

Common base IED values for the primary current (IBase), primary voltage (UBase)
and primary power (SBase) are set in global base values for settings function
GBASVAL.
GlobalBaseSel: Selects the global base value group used by the function to define
IBase, UBase and SBase as applicable.
Explanation of the setting parameters
Operation: Set to On in order to activate the function; set to Off to switch off the
complete function.
StartCurr: Operation phase current level given in % of IBase.
Characterist: Selection of time characteristic: Definite time delay and different
types of inverse time characteristics are available; see Technical Manual for details.
tDef_OC: Definite time delay. It is used if definite time characteristic is chosen; it
shall be set to 0 s if the inverse time characteristic is chosen and no additional delay
VRPVOC
I3P*
U3P*
BLOCK
BLKOC START
BLKUV
Section 9
Current protection
Trip output
TRIP
TROC
t
TRUV
STOC
STUV
IEC12000183-1-en.vsd
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