GE 269Plus

B- 2 269Plus Motor Management Relay GE Power Management
269 PLUS RTD BIAS FEATURE B THERMAL MODEL & BIAS FEATURE
B
B.2 269 PLUS RTD BIAS FEATURE
Figure B–2: RTD BIAS FEATURE
LEGEND
Tmax.............RTD Bias Maximum Temperature Value
Tmin..............RTD Bias Minimum Temperature Value
Hottest RTD ..Hottest Stator RTD measured
TC .................Thermal Capacity Used
TC RTD.........Thermal Capacity Looked up on RTD Bias Curve.
TC Model ......Thermal Capacity based on the Thermal Model
START
END
RTD BIAS
ENABLED
RTD BIAS
ENABLED
YES
YES
YES
YES
NO
NO
NO
NO
HOTTEST
STATOR RTD >
Tmax
HOTTEST
STATOR RTD >
Tmax
T.C. RTD>
T.C. THERMAL
MODEL
T.C. RTD>
T.C.
THERMAL
MODEL
HOTTEST
STATOR RTD <
Tmin
HOTTEST
STATOR RTD <
Tmin
Tmax<HOTTEST STATOR RTD<Tmin
(T.C. LOOKED UP ON RTD
BIAS CURVE)
Tmax<HOTTEST STATOR RTD<Tmin
(T.C.
LOOKED UP ON RTD
BIAS CURVE)
T.C. =
T.C. MODEL
T.C. =
T.C. MODEL
T.C. =
T.C. RTD
T.C. =
T.C. RTD
YES
YES
T.C.=
T.C. RTD =
100%
T.C.=
T.C. RTD =
100%
OVERLOVERLOAD?OAD?
TRIP
NO
NO
T.C. MODEL=
100%
T.C. MODEL=
100%