GE Multilin 345 - Specifications; Password security; Protection

CHAPTER 1: INTRODUCTION SPECIFICATIONS
345 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL 1–9
NOTE
NOTE:
Refer to the 3 Series Retrofit Instruction Manual for the retrofit of Multilin MI, MII, MLJ, and
TOV relays.
Specifications
NOTE
NOTE:
Specifications are subject to change without notice.
NOTE
NOTE:
All accuracies defined below are at nominal frequency (50Hz or 60Hz) unless otherwise
stated.
NOTE
NOTE:
To obtain the element operating time delay, i.e. from fault injection until operation, add the
operate time to the curve time.
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 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)
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