5.14
SEL-387-0, -5, -6 Relay Instruction Manual Date Code 20170601
Metering and Monitoring
Thermal Monitor (SEL-387-6 Relay)
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XFMR 1 Date: 05/21/00 Time: 14:17:35.045
STATION A
FID=SEL-387-6-Xxxx-V0-Z001001-Dxxxxxxxx
Transformer 1
Thermal Element Condition : N0RMAL
Load(Per Unit) : 0.96
In Service Cooling Stage : 1
Ambient (deg. C) : 15.0
Calculated Top Oil (deg. C) : 23.4
Measured Top Oil (deg. C) : 400.0
Winding Hot Spot (deg. C) : 46.7
Aging Acceleration Factor, FAA : 0.00
Rate of LOL (%/day) : 0.00
Total Accumulated LOL (%) : 0.00
Time-Assert TLL (hours) : 0.00
Transformer 2
Thermal Element Condition : N0RMAL
Load(Per Unit) : 0.96
In Service Cooling Stage : 1
Ambient (deg. C) : 15.0
Calculated Top Oil (deg. C) : 23.4
Measured Top Oil (deg. C) : 400.0
Winding Hot Spot (deg. C) : 46.7
Aging Acceleration Factor, FAA : 0.00
Rate of LOL (%/day) : 0.00
Total Accumulated LOL (%) : 0.00
Time-Assert TLL (hours) : 0.00
Transformer 3
Thermal Element Condition : N0RMAL
Load(Per Unit) : 0.96
In Service Cooling Stage : 1
Ambient (deg. C) : 15.0
Calculated Top Oil (deg. C) : 23.4
Measured Top Oil (deg. C) : 400.0
Winding Hot Spot (deg. C) : 46.6
Aging Acceleration Factor, FAA : 0.00
Rate of LOL (%/day) : 0.00
Total Accumulated LOL (%) : 0.00
Time-Assert TLL (hours). . . . .: 0.00
Thermal Event Report
Quantities
Thermal Element Conditions
The load condition value can be Normal, Warning 1, Warning 2, or Warning 3.
Load Current
The load current is reported as a per-unit value based on the transformer
rating.
NOTE: When the thermal model is
applied on one three-phase
transformer (XTYPE = 3), the
SEL-387-6 displays only the values for
Transformer 1; but when the thermal
model is applied on a set of three
single-phase transformers
(XTYPE = 1), the SEL-387-6 displays
the values for Transformer 1,
Transformer 2, and Transformer 3.
Table 5.1 Thermal Element Conditions
Value Description
Normal TO1, TO2, HS1, HS2, FAA1, FAA2, CSE,
RLL, and TLL Relay Word bits are not asserted.
Warning 1 TO1, HS1, FAA1, RLL, or TLL Relay Word bit is asserted.
Warning 2 TO2, HS2, FAA2 Relay Word bit is asserted.
Warning 3 CSE Relay Word bit is asserted.
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