Voltage Sensing - GE 845 Instruction Manual

SYSTEM

Voltage Sensing

4–82
..\Current Sensing\CT Bank 2 K
Item Name
CT Bank Name
Phase CT Primary
Ground CT Primary
Current 2
The Voltage Sensing menu provides the setup for all VTs (PTs) connected to the relay
voltage terminals.
The 845 can be connected to 4 VTs, i. e. three-phase VTs from either a Wye (Star) or a Delta
connection, and one auxiliary VT. The VT inputs setup for the 845 is shown below:
Path:
Setpoints > System > Voltage Sensing > Ph VT Bnk1-J2
..\Voltage Sensing\Ph VT Bnk1 J2
Item Name
Phase VT Bank Name
Phase VT Connection
Phase VT Secondary
Phase VT Ratio
Aux. VT Name
Aux. VT Connection
Aux. VT Secondary
Aux. VT Ratio
Voltage 1
PHASE VT BANK NAME
Range: Any combination of 13 alphanumeric characters
Default: Ph VT Bnk 1-J2
Enter the name of the phase voltage from bank J2.
PHASE VT CONNECTION
Range: Wye, Delta
Default: Wye
Select the type of phase VT connection to match the VTs (PTs) connected to the relay.
Value
CT Bank 2 K
500
500
Value
Ph VT Bnk1 J2
Wye
120.0
1
Ax VT Bnk1 J2
Vab VT
120.0
1
845 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 4: SETPOINTS
Unit
A
A
Unit
V
V