GE 845 Instruction Manual page 375

CHAPTER 4: SETPOINTS
845 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
MODE
Range: Detection, Monitoring
Default: Detection
The Breaker Health has two running modes: detection and monitoring. Since the
monitored time intervals differ for different breaker types and manufacturers, the
detection mode can be used to help users set the Pickup settings based on the historical
true values. The operation count, arcing energy of the breaking current, arcing time,
tripping time, closing time and spring charging time are measured and displayed in
'Records/Breaker Health,' But the element does not pick up when in detection mode.
Monitoring mode is the normal mode, wherein measurements are analyzed and the
element may pick up accordingly.
PRESET TRIP COUNTER
Range: 0 to 100000 in steps of 1
Default: 0
This setting pre-sets the actual operation number when the relay is starting in service or
the record is cleared.
TRIP TRIGGER
Range: Off, Any operand from the list of FlexLogic operands
Default: Off
This setting assigns the trip initiation signal.
CLOSE TRIGGER
Range: Off, Any operand from the list of FlexLogic operands
Default: Off
This setting assigns the close initiation signal.
OPEN STATUS
Range: Off, Any operand from the list of FlexLogic operands
Default: Off
The setting selects the signal to show the open status of the breaker. If the contact input
is not configured, the detection of open status is delayed by an extra debouncing time.
CLOSE STATUS
Range: Off, Any operand from the list of FlexLogic operands
Default: Off
The setting selects the signal to show the close status of the breaker. If the contact input
is not configured, the detection of close status is delayed by an extra debouncing time.
SPRING CHARGE STATUS
Range: Off, Any operand from the list of FlexLogic operands
Default: Off
The setting selects the signal to show the status of Spring Charge. Normally, the contact
input connected to the auxiliary contact of the limit switch can be used.
TRIP TIME PICKUP
Range: 0.000 to 6000.000 s in steps of 0.001 s
Default: 0.050 s
The setting sets the Pickup level of the Trip time. The Trip time interval is initiated by the
TRIP TRIGGER signal and stopped by the OPEN STATUS signal.
CLOSE TIME PICKUP
Range: 0.000 to 6000.000 s in steps of 0.001 s
Default: 0.050 s
The setting sets the Pickup level of the Close time. The Close time interval is initiated by
the CLOSE TRIGGER signal and stopped by the CLOSE STATUS signal.
MONITORING
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