S2 System Setup Using The Keypad; Description; Example: Ct/Vt Setup - GE Multilin 369 Quick Start Manual

S2 SYSTEM SETUP USING THE KEYPAD

4.3 S2 System Setup Using the Keypad
4.3.1

Description

4.3.2

Example: CT/VT Setup

CT/VT SETUP
4–32
The system setup setpoints are critical to the operation of the 369 protective and metering
features and elements. Most protective elements are based on the information input for
the CT/VT Setup and Output Relay Setup. Additional monitoring alarms and control
functions of the relay are also set here.
PATH: S2 SYSTEM SETUP
PHASE CT PRIMARY:
500
MOTOR FLA:
10
GROUND CT TYPE:
5
GROUND CT PRIMARY:
100
VT CONNECTION TYPE:
None
VT RATIO:
35:1
MOTOR RATED VOLTAGE:
4160
NOMINAL FREQUENCY:
60 Hz
SYSTEM PHASE
SEQUENCE: ABC
• PHASE CT PRIMARY: Enter the phase CT primary here. The phase CT secondary (1 A or
5A) is determined by terminal connection to the 369. The phase CT should be chosen
such that the motor FLA is between 50% and 100% of the phase CT primary. Ideally
the motor FLA should be as close to 100% of phase CT primary as possible, never
more. The phase CT class or type should also be chosen such that the CT can handle
the maximum potential fault current with the attached burden without having its
output saturate. Information on how to determine this if required is available in the
369 Instruction Manual Section 7.4: CT Specification and Selection.
• MOTOR FLA: The motor FLA (full load amps or full load current) must be entered. This
value may be taken from the motor nameplate or motor data sheets.
• GROUND CT TYPE and GROUND CT PRIMARY: The
(if 5 A or 1 A secondary) must be entered here. For high resistance grounded
PRIMARY
systems, sensitive ground detection is possible with the 50:0.025 CT. On solidly or low
CT/VT SETUP
Range: 1 to 5000 in steps of 1
Range: 1 to 5000 in steps of 1
Range: None, 5A secondary, 1A secondary, 50:0.025
Range: 1 to 5000 in steps of 1
Only shown for 5A and 1A secondary CT
Range: None, Open Delta, Wye
Only shown if option M or B installed
Range: 1.00:1 to 240.00:1
Not shown if VT Connection Type set to None
Range: 100 to 20000 in steps of 1
Not shown if VT Connection Type set to None
Range: 50 Hz, 60 Hz, Variable
Range: ABC, ACB
Not shown if VT Connection Type set to None
369 MOTOR MANAGEMENT RELAY – QUICKSTART GUIDE
CHAPTER 4: KEYPAD SETPOINTS
GROUND CT TYPE and GROUND CT