CHAPTER 5: SETTINGS GROUPED ELEMENTS
T35 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL 5-207
5
Figure 5-106: Transformer aging factor logic
5.7.3.6 Loss of life
SETTINGS GROUPED ELEMENTS SETTING GROUP 1(6) TRANSFORMER LOSS OF LIFE
The Loss of Life element detects the accumulated total consumed transformer life. This element can be set to issue an
alarm or trip when the actual accumulated transformer life becomes larger than the user-specified loss of life pickup
value. For new transformers installations, set the
XFMR INITIAL LOSS OF LIFE setting to “0.” For previously installed
transformers, pre-determine the consumed transformer life in hours.
LOSS OF LIFE INITIAL VALUE — Enter a setting for the consumed transformer life in hours. When the Loss of Life element is
enabled, the computed loss of life is added to the initial loss of life.
LOSS OF LIFE PICKUP — Enter the expended life, in hours, required for operation of the element. Set this setting above the
total transformer life set as a reference based on nominal loading conditions and a 30°C ambient temperature, as outlined
in the IEEE standards.
Figure 5-107: Transformer loss of life logic
LOSS OF LIFE
LOSS OF LIFE
FUNCTION: Disabled
Range: Disabled, Enabled
LOSS OF LIFE INITIAL
VALUE: 0 hrs
Range: 0 to 500000 hrs. in steps of 1
LOSS OF LIFE PICKUP:
180000 hrs
Range: 0 to 500000 hrs. in steps of 1
LOSS OF LIFE BLOCK:
Off
Range: FlexLogic operand
LOSS OF LIFE TARGET:
Self-Reset
Range: Self-reset, Latched, Disabled
To Next Page
Loading...
