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745
Transformer Management Relay
! AGING FACTOR
LIMIT
5–80
c) Aging Factor Limit
PATH: SETPOINTS
!"
S4 ELEMENTS
[!]
AGING FACTOR LIMIT
FUNCTION: Disabled
AGING FACTOR LIMIT
MESSAGE
TARGET: Self-Reset
AGING FACTOR LIMIT
MESSAGE
PICKUP:
AGING FACTOR LIMIT
MESSAGE
DELAY:
AGING FACTOR LIMIT
MESSAGE
BLOCK: Disabled
The Aging Factor Limit element provides a means of detecting when a transformer is
aging faster than would normally be acceptable. The element operates on the
computed aging factor, which in turn is derived from the computed hottest-spot
value. The aging factor value will revert to zero if the power supply to the relay is
interrupted. The necessary settings required for this element to perform correctly
are entered under:
•
AGING FACTOR LIMIT PICKUP: Enter the Aging Factor required for operation
of the element. This setting should be above the maximum permissible aging
factor under emergency loading condition and maximum ambient temperature.
•
AGING FACTOR LIMIT DELAY: Enter a time delay above which the Aging
Factor must remain before the element operates.
FIGURE 5–40: Aging Factor Limit Scheme Logic
http://www.GEindustrial.com/multilin
!"
INSULATION AGING
!"
AGING FACTOR LIMIT
Range: Enabled, Disabled
Range: Self-Reset, Latched, None
Range: 1.1 to 10.0 in steps of 0.1
2.0
Range: 0 to 60000 min. in steps of 1
10 min
Range: Logc Inpt 1 to 16, Virt Inpt 1 to
16, Output Rly 2 to 8, SelfTest
Rly, Vir Outpt 1 to 5, Disabled
S4 Elements
GE Multilin
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