GE Multilin T60 Transformer Protection System 5-179
5 SETTINGS 5.6 GROUPED ELEMENTS
5
• XFMR HST PICKUP: Enter the hottest-spot temperature required for operation of the element. This setting should be
based on the maximum permissible hottest-spot temperature under emergency transformer loading conditions and
maximum ambient temperature.
• XFMR HST DELAY: Enter an appropriate time delay before operation of the element.
Figure 5–92: TRANSFORMER HOTTEST-SPOT TEMPERATURE LOGIC
e) AGING FACTOR
PATH: SETTINGS GROUPED ELEMENTS SETTING GROUP 1(6) TRANSFORMER AGING FACTOR
The Aging Factor element detects transformer aging in per-unit normal insulation aging. The element can be set for alarm
or trip whenever the computed aging factor is greater than the user-defined pickup setting for the specified time delay.
• AGING FACTOR PICKUP: Enter a value above which the aging factor element will operate. The setting should be
greater than the maximum permissible aging factor under emergency loading conditions and maximum ambient tem-
perature.
Figure 5–93: AGING FACTOR LOGIC
AGING FACTOR
AGING FACTOR
FUNCTION: Disabled
Range: Disabled, Enabled
MESSAGE
AGING FACTOR PICKUP:
2.0 pu
Range: 1.1 to 10.0 pu in steps of 0.1
MESSAGE
AGING FACTOR
DELAY: 10 min.
Range: 0 to 30000 min. in steps of 1
MESSAGE
AGING FACTOR BLOCK:
Off
Range: FlexLogic™ operand
MESSAGE
AGING FACTOR TARGET:
Self-Reset
Range: Self-reset, Latched, Disabled
SETTING
SETTING
ACTUAL VALUE
SETTINGS
FLEXLOGIC OPERANDS
HOTTEST-SPOT t
FUNCTION:
°
HOTTEST-SPOT t
BLOCK:
°
HOTTEST-SPOT t° XFMR HST-SPOT t C OP°
XFMR HST-SPOT t C DPO°
XFMR HST-SPOT t C PKP°
Disable=0
Enable=1
Off=0
HOTTEST-SPOT t
PICKUP:
°
HOTTEST-SPOT t
PICKUP TIME DELAY:
°
RUN
t C > PKP°
t
PKP
828731A3.CDR
AND
SETTING
SETTING
ACTUAL VALUE
SETTINGS
FLEXLOGIC OPERANDS
AGING FACTOR
FUNCTION:
AGING FACTOR
BLOCK:
AGING FACTOR-FAA
FAA > PKP
t
PKP
RUN
AGING FACTOR
PICKUP DELAY:
AGING FACTOR
PICKUP:
AGING FACTOR OP
AGING FACTOR DPO
AGING FACTOR PKP
Disable=0
Enable=1
Off=0
828733A2.CDR
AND
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