GE D90 Plus Instruction Manual page 449

CHAPTER 8: AUTOMATION
PLUS
D90 LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
Operate Time
Range: 0.000 to 2.000 seconds in steps of 0.001
Default: 0.070 seconds
This setting specifies a timer that is asserted when both the normally open and normally
closed disconnect indications are reset. When the timer expires, a bad status is
indicated for the disconnect. Set the time to be equal to the normal operating time for
the disconnect.
Discrepancy Time
Range: 0.000 to 2.000 seconds in steps of 0.001
Default: 0.070 seconds
This setting specifies a timer that is asserted when the three disconnect poles are not all
opened or not all closed. Set the time to be greater than the longest expected time for
which the three disconnect poles disagree.
Reset Counter
Range: any automation logic operand or shared operand
Default: Off
Assertion of the operand assigned to this setting resets the disconnect operation
counters.
Events
Range: Enabled, Disabled
Default: Enabled
This setting enables and disables the logging of circuit disconnect events in the
sequence of events recorder.
The figures show the disconnect 1 configuration logic. The logic is identical for each
available disconnect.
Figure 367: Disconnect logic, sheet 1 of 4
DISCONNECTS
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