Selected Voltage
Magnitude
OC1 Stage Pickup Level
PickupCurr_OC1
VDepFact_OC1 * PickupCurr_OC1
VHighLimit_OC1
VLowLimit_OC1
en05000324_ansi.vsd
ANSI05000324 V1 EN
Figure 113:
Example for OC1 step current pickup level variation as function of
measured voltage magnitude in Slope mode of operation
•
Voltage controlled overcurrent (when setting parameter
VDepMode_OC1
=
Step
)
Selected Voltage Magnitude
OC1 Stage Pickup Level
PickupCurr_OC1
VDepFact_OC1 *
PickupCurr_OC1
VHighLimit_OC1
en05000323_ansi.vsd
ANSI05000323 V1 EN
Figure 114:
Example for OC1 step current pickup level variation as function of
measured voltage magnitude in Step mode of operation
This feature will simply change the set overcurrent pickup level in accordance with
magnitude variations of the measured voltage. It shall be noted that this feature will as well
affect the pickup current value for calculation of trip times for IDMT curves (overcurrent
with IDMT curve will trip faster during low voltage conditions).
1MRK 511 365-UUS A
Section 11
Multipurpose protection
Phasor measurement unit RES670 2.1 ANSI
339
Technical manual
Содержание Relion 670 Series RES670
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