GE 845 Instruction Manual page 359

CHAPTER 4: SETPOINTS
845 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
TARGETS
Range: Disabled, Self-reset, Latched
Default: Self-reset
The selection of the
Self-reset
function.
Figure 4-103: Aging Factor Logic diagram
Loss of Xfmr Life
The Loss of Life (LOL) element provides a mechanism for detecting the accumulated total
consumed transformer life. It can be set to issue an alarm or trip, when the actual
accumulated transformer loss of life is higher than what is specified by the user loss of life
pickup setpoint. For brand new installed transformers, the setting for "XFMR INITIAL LOSS"
is "0", and for already installed transformers, the user must estimate the consumed
transformer life in hours, being in service.
Path: Setpoints > Grouped Elements > Setting Group 1(8) > Transformer > Loss of Xfmr Life
..\Transformer\Loss of Xfmr Life
Item Name
Function
Initial Xfmr LOL
Pickup
Block
Output Relay X
Events
Targets
Loss Life
FUNCTION
Range: Disabled, Alarm, Latched Alarm, Configurable
Default: Disabled
or settings enables the target messages of the
Latched
Value
Disabled
0
200000
Off
Do Not Operate
Enabled
Self Reset
MONITORING
Unit
hrs
hrs
4–255