GE MI-869 Instruction Manual page 399

CHAPTER 4: SETPOINTS
NOTE:
869 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL
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
over T time. There is no unit to this setting
avg
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 the "Yes" command causes the monitoring algorithm to block and go to the
learning phase algorithm.
• During the learning phase, the monitoring phase algorithm is blocked.
• When new Z value is calculated (in Auto mode) or manually entered (in Manual
nn
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:
Range: Do Not Operate, Operate
Default: Do Not Operate
Any or all of the output relays 3 to 6 can be selected to operate, upon Stator Inter-Turn
fault operation.
EVENTS:
Range: Enabled, Disabled
Default: Enabled
The selection of the Enabled setting enables the events of the Stator Inter-Turn fault
function.
MONITORING
and Z averaged
np pp
4–281