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1MRK 505 370-UEN D
current of twenty times the set current pickup value. Note that the operate time value is
dependent on the selected setting value for time multiplier
INxMult : Multiplier for scaling of the current setting value. If a binary input signal (ENMULTx) is
activated, the current operation level is increased by this setting constant.
ResetTypeCrvx : The reset of the delay timer can be made in different ways. The possibilities
are described in the technical reference manual.
tResetx : Constant reset time delay in s for step x.
HarmBlockx : This is used to enable block of step x from 2
tPCrvx, tACrvx, tBCrvx, tCCrvx : Parameters for user programmable of inverse time
characteristic curve. The time characteristic equation is according to equation 36:
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EQUATION1189 V1 EN-US
Further description can be found in the technical reference manual.
tPRCrvx, tTRCrvx, tCRCrvx : Parameters for user programmable of inverse reset time
characteristic curve. Further description can be found in the technical reference manual.
7.4
Four step directional negative phase sequence
overcurrent protection NS4PTOC
7.4.1
Identification
Function description
Four step negative sequence
overcurrent protection
7.4.2
Application
Four step negative sequence overcurrent protection NS4PTOC is used in several applications
in the power system. Some applications are:
Busbar protection REB670
Application manual
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IEC 61850
IEC 60617
identification
identification
NS4PTOC
I2
4
alt
4
IEC10000053 V1 EN-US
Current protection
kx .
harmonic restrain function.
GUID-E8CF8AA2-AF54-4FD1-A379-3E55DCA2FA3A v1
GUID-E1720ADA-7F80-4F2C-82A1-EF2C9EF6A4B4 v1
ANSI/IEEE C37.2
device number
46I2
GUID-343023F8-AFE3-41C2-8440-1779DD7F5621 v2
Section 7
(Equation 36)
165
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