S2 System Setup; Current Sensing - GE 339 Instruction Manual

S2 SYSTEM SETUP

S2 System Setup

Current sensing

NOTE:
NOTE
NOTE:
NOTE
6–24
Figure 6-11: Main system setup menu
PATH:
SETPOINTS > S2 SYSTEM SETUP > CURRENT SENSING
The CT secondary value of 1 or 5 A must be specified at the time of order so that the proper
hardware is installed.
The setting GROUND CT PRIMARY is seen only if the GROUND CT TYPE is set to "1A
Secondary" or "5A Secondary".
PHASE CT PRIMARY
Range: 10 to 5000 A in steps of 1 A
Default: 100 A
The phase CT should be chosen so that the FLA is no less than 50% of the rated phase CT
primary. Ideally, the phase CT primary should be chosen so that the FLA is 100% of the
phase CT primary or slightly less; never more.
PHASE CT SECONDARY
Range: 1 A or 5 A
Default: 5 A
Configurable 1 A or 5 A secondary, available with Phase Current option 'P0' installed.
Enter the rated phase CT secondary current of the three-phase current transformers.
339 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 6: SETPOINTS