GE D90 Plus Instruction Manual page 331

CHAPTER 7: PROTECTION
PLUS
D90 LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
Figure 272: Open pole detector configuration settings
The following settings are available for the open pole detector feature.
Function
Range: Enabled, Disabled
Default: Disabled
This setting enables and disabled 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, this value should be the net capacitive reactance of the line and the
reactors installed between the line breakers. The value is entered in secondary ohms.
This setting is relevant if 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, this value should be the net capacitive reactance of the line and the reactors
installed between the line breakers. The value shall be entered in secondary ohms. This
setting is relevant if 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
CONTROL ELEMENTS
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