GE D90 Plus Instruction Manual page 346

CONTROL ELEMENTS
336
Figure 275: Open pole detector configuration settings
The following settings are available.
Function
Range: Enabled, Disabled
Default: Disabled
This setting enables and disables the open pole detector feature.
Block
Range: any FlexLogic operand or shared operand
Default: OFF
Assertion of the operand assigned to this setting blocks operation of the open pole
detector element.
Voltage Supervision
Range: Disabled, Enabled
Default: Disabled
If this setting is enabled, an open pole condition is declared when the current in a
particular phase is less than its pickup setting and the voltage of the same phase is less
than or equal to 0.7 pu.
Current Pickup
Range: 0.000 to 30.000 pu in steps of 0.001
Default: 0.050 pu
This setting specifies the current threshold below which an open pole is declared.
Open Pole Line XC1
Range: 300.0 to 9999.9 ohms in steps of 0.001
Default: 9999.9 ohms
This setting specifies the positive-sequence reactance of the entire line. If shunt reactors
are applied, make this value the net capacitive reactance of the line and the reactors
installed between the line breakers. Enter the value in secondary ohms. This setting is
relevant if the open pole condition at the remote end of the line is to be sensed and
utilized by the relay.
Open Pole Line XC0
Range: 300.0 to 9999.9 ohms in steps of 0.001
Default: 9999.9 ohms
This setting specifies the zero-sequence reactance of the entire line. If shunt reactors are
applied, make this value the net capacitive reactance of the line and the reactors
installed between the line breakers. Enter the value in secondary ohms. This setting is
relevant if the open pole condition at the remote end of the line is to be sensed and
utilized by the relay (via the operand).
OPEN POLE REM OP
PLUS
D90 LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 7: PROTECTION