269 Plus Rtd Bias Feature - GE 269Plus Instruction Manual

269 PLUS RTD BIAS FEATURE

B
NO
NO
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
B-
2
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T.C.= T.C.=
T.C. RTD = T.C. RTD =
100% 100%
OVERLOAD? OVERL OAD?
YES
T.C. MODEL= T.C. MODEL=
100% 100%
YES
TRIP
END
Figure B–2: RTD BIAS FEATURE
269Plus Motor Management Relay
B THERMAL MODEL & BIAS FEATURE
B.2 269 PLUS RTD BIAS FEATURE
START
RTD BIAS RTD BIAS
ENABLED ENABLED
YES
YES
HOTTEST HOTTEST
STATOR RTD > STATOR RTD >
Tmax Tmax
NO
HOTTEST HOTTEST
STATOR RTD < STATOR RTD <
Tmin Tmin
NO
Tmax<HOTTEST STATOR RTD<Tmin Tmax<HOTTEST STATOR RTD<Tmin
(T.C. LOOKED UP ON RTD (T.C. LOOKED UP ON RTD
BIAS CURVE) BIAS CURVE)
YES
T.C. RTD> T.C. RTD>
T.C. THERMAL T.C. THERMAL
MODEL MODEL
NO
T.C. = T.C. = T.C. = T.C. =
T.C. RTD T.C. RTD
T.C. MODEL T.C. MODEL
NO
YES
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