GE 345

CHAPTER 1: INTRODUCTION SPECIFICATIONS
345 TRANSFORMER PROTECTION SYSTEM – QUICKSTART GUIDE 7
Specifications
NOTE
NOTE:
Specifications are subject to change without notice.
NOTE
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.
Password security
PASSWORD SECURITY
Master Reset 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/GROUND/NEGATIVE SEQUENCE TIMED OVERCURRENT (51P/51N/51G/
51_2)
Ground Current:................................................... Fundamental
Pickup Level:.......................................................... 0.05 to 20.00 x CT in steps of 0.01 x CT
Dropout Level: ...................................................... 97 to 99% 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/Short
IAC Extremely/Very/Inverse/Short
Curve Multiplier:................................................... 0.05 to 20.00 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
SENSITIVE GROUND TIMED OVERCURRENT (51SG)
Ground Current:................................................... Fundamental
Pickup Level:.......................................................... 0.005 to 3.000 x CT in steps of 0.001 x CT
Dropout Level: ...................................................... 97 to 99% of Pickup @ I > 0.1 x CT
Pickup - 0.02 x CT @ I < 0.1 x CT
Curve Shape:......................................................... ANSI Extremely/Very/Moderately/Normally Inverse
Definite Time
IEC Curve A/B/C/Short
IAC Extreme/Very/Inverse/Short
Curve Multiplier:................................................... 0.05 to 20.0 in steps of 0.1
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