GE 869 - Page 427

CHAPTER 4: SETPOINTS MONITORING
869 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL 4–295
PICKUP DELAY STAGE 1:
Range: 0.00 to 600.00 s in steps of 0.01 s
Default: 0.00
This setting provides the selection for the Pickup 1 time delay used to delay the
operation of the protection.
PICKUP STAGE 2:
Range: 0.001 to 10.000 in steps of 0.001
Default: 0.600
This setting specifies a second pickup threshold of ratio between Z
np
and Z
pp
averaged
over T
avg
time.
PICKUP DELAY STAGE 2:
Range: 0.00 to 600.00 s in steps of 0.01 s
Default: 0.00
This setting provides the selection for the Pickup 2 times delay used to delay the
operation of the protection.
DROPOUT DELAY:
Range: 0.00 to 600.00 s in steps of 0.01 s
Default: 0.00
This setting provides the selection for the dropout time delay used to delay the dropout
of the detection of the Stator Inter-turn Fault condition.
LEARN TURN FAULT DATA:
Default: No
Range: Yes, No
Selecting Yes causes the monitoring algorithm to pause and run the learning phase
algorithm. Once the learning phase algorithm has finished running, LEARN TURN FAULT
DATA is automatically set to No.
NOTE
NOTE:
• During the learning phase, the monitoring phase algorithm is blocked.
When a new Z
nn
value is calculated (in Auto mode) or manually entered (in Manual mode),
LEARN TURN FAULT DATA is automatically changed to “Yes” in order to calculate the new
Z
UBbase
BLOCK:
Range: Off, FlexLogic operands
Default: Off
The Stator Inter-turn fault element will be blocked, when the selected operand is
asserted.
OUTPUT RELAY X:
For details see Common Setpoints
.
EVENTS:
Range: Enabled, Disabled
Default: Enabled
The selection of the Enabled setting enables the events of the Stator Inter-turn fault
function.
TARGETS:
Range: Self-reset, Latched, Disabled
Default: Latched
The selection of the Self-reset or Latched settings enables the targets of Stator Inter-turn
fault function.