1–8 339 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL
SPECIFICATIONS CHAPTER 1: INTRODUCTION
Specifications
NOTE:
Specifications are subject to change without notice.
NOTE:
To obtain the total element operating time, i.e. from the presence of a trip condition to
initiation of a trip, add 8 ms output relay time to the operate times listed below.
NOTE:
For multi-phase protection elements, the trip delay setting applies to the first trip phase.
The remaining phases trip instantaneously if the first phase is tripped.
NOTE:
Specifications are subject to the VFD function being disabled or bypassed.
Password security
PASSWORD SECURITY
Master Password:...............................................8 to 10 alpha-numeric characters
Settings Password:............................................. 3 to 10 alpha-numeric characters for local and remote
access
Control Password: ..............................................3 to 10 alpha-numeric characters for local and remote
access
Protection
PHASE/NEUTRAL TIMED OVERCURRENT (51P/51N)
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
Curve Shape:......................................................... ANSI Extremely/Very/Moderately/Normally Inverse
Definite Time (0.1 s base curve)
IEC Curve A/B/C and Short Inverse
IAC Extremely/Very/-/Short Inverse
Curve Multiplier: .................................................. 0.05 to 50.00 in steps of 0.01
Reset Time:............................................................ Instantaneous, Linear
Curve Timing Accuracy:.................................. ±3% of expected inverse time or 1 cycle, whichever is
greater, from pickup to operate
Level Accuracy: ................................................... per CT input
DIRECTIONAL POWER (32)
Measured power:................................................ 3-phase
Characteristic angle:......................................... 0º to 359º in steps of 1°
Power pickup range: ......................................... -1.200 to 1.200 x Rated Power in steps of 0.001
Pickup level accuracy:...................................... 2.5% or 0.01 pickup, whichever is greater
Hysteresis: ............................................................. 2% of pickup
Pickup time delay:.............................................. 0.0 to 600.0 s in steps of 0.1 s
Operate time:........................................................ < 55 ms at 1.1 x pickup at 60 Hz
< 65 ms at 1.1 x pickup at 50 Hz
Timer accuracy:.................................................. ± 3% of delay setting or ± ¼ cycle (whichever is greater)
from pickup to operate
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