GE MULTILIN 269 MOTOR MANAGEMENT RELAY Series User Manual

APPENDIX B
B-1
269 Thermal Model
(Discreet time based algorithm, 250 ms update).
LEGEND
U/B .................... Unbalance
I/P ...................... Input
Iavg .................... Average Three Phase Current
Ieq...................... Equivalent Average Three Phase Cur-
rent
Ip ....................... Positive Sequence Current
In ....................... Negative Sequence Current
K........................ Constant Multiplier that Equates In to
Ip
FLC ......................Full Load Current
FLC TCR ............ FLC Thermal Capacity Reduction
Setpoint
TC ........................Thermal Capacity used
RTD BIAS TC...... TC Value looked up from RTD Bias
Curve
NOTE: If Unbalance input to thermal memory is en-
abled, the increase in heating is reflected in
the thermal model. If RTD Input to Thermal
Memory is enabled, the feedback from the
RTDs will correct the thermal model.

GE MULTILIN 269 MOTOR MANAGEMENT RELAY Series Specifications

General

Brand	GE
Model	MULTILIN 269 MOTOR MANAGEMENT RELAY Series
Category	Relays
Language	English