CHAPTER 1: INTRODUCTION
SPECIFICATIONS
350 FEEDER PROTECTION SYSTEM – QUICKSTART GUIDE
11
PHASE/NEUTRAL/GROUND/NEGATIVE SEQUENCE INSTANTANEOUS OVERCURRENT
(50P/50N/50G/50_2)
Pickup Level:.......................................................... 0.05 to 20.00 x CT in steps of 0.01 x CT
Dropout Level: ...................................................... 97% of Pickup @ I > 1 x CT
Pickup - 0.02 x CT @ I <1 x CT
Time Delay:............................................................ 0.00 to 300.00 sec in steps of 0.01
Operate Time:....................................................... <30 ms @ 60Hz (I > 2.0 x PKP, No time delay)
<35 ms @ 50Hz (I > 2.0 x PKP, No time delay)
Time Delay Accuracy: ...................................... 1% or 1 cycle, whichever is greater (Time Delay selected)
Level Accuracy:.................................................... per CT input
SENSITIVE GROUND INSTANTANEOUS OVERCURRENT (50SG)
Pickup Level (Gnd IOC):..................................... 0.005 to 3.000 x CT in steps of 0.001 x CT
Dropout Level: ...................................................... 97% of Pickup @ I > 0.1 x CT
Pickup - 0.002 x CT @ I < 0.1 x CT
Time Delay:............................................................ 0.00 to 300.00 sec in steps of 0.01
Operate Time:....................................................... <30 ms @ 60Hz (I > 2.0 x PKP, No time delay)
<35 ms @ 50Hz (I > 2.0 x PKP, No time delay)
Time Delay Accuracy: ...................................... 1% or 1 cycle, whichever is greater (Time Delay selected)
Level Accuracy:.................................................... per CT input
PHASE DIRECTIONAL (67P)
Directionality: ....................................................... Co-existing forward and reverse
Operating:............................................................... Phase Current (Ia, Ib, Ic)
Polarizing Voltage:.............................................. Quadrature Voltage
(ABC phase sequence: Vbc, Vca, Vab)
(CBA phase sequence: Vcb, Vac, Vba)
Polarizing voltage threshold: ......................... 0.05 to 1.25 x VT in steps of 0.01
MTA (Maximum Torque Angle): ..................... From 0
º
to 359
º
in steps of 1°
Angle Accuracy: .................................................. ±4
º
Operational Delay: ............................................. 20 to 30 ms
NOTE
NOTE:
The selection of the “P” or “R” option from “350 OTHER OPTIONS” in the order code table,
will enable the Phase directional element. The polarizing voltage used for this element is
the line voltage.
GROUND DIRECTIONAL (67G)
Directionality: ....................................................... Co-existing forward and reverse
Operating:............................................................... Ground Current (Ig)
Polarizing Voltage:.............................................. -V
0
calculated using phase voltages (VTs must be connected
in “Wye”)
-3V
0
measured from Vaux input. (3V
0
provided by an
external open delta connection).
MTA (Maximum Torque Angle): ..................... From 0
º
to 359
º
in steps of 1°
Angle Accuracy: .................................................. ±4
º
Operational Delay: ............................................. 20 to 30 ms
NOTE
NOTE:
The selection of the “D” option from “350 OTHER OPTIONS” in the Order Code table, will
enable the Ground Directional element with voltage polarizing 3V
0
measured from the
Vaux voltage input.
NOTE
NOTE:
The selection of the “P”, “R”, or “W” option from “350 OTHER OPTIONS” in the order code
table, will enable the Ground directional element. The polarizing voltage used for this
element is the computed V
0
from the measured phase voltage inputs.
