GE MULTILIN 269 MOTOR MANAGEMENT RELAY Series Instruction Manual page 67

3 SETUP AND USE
10*
RTD BIAS CENTER TEMP. RTD BIAS CENTER TEMP.
VALUE = XXX C VALUE = XXX C
(Not seen when RTD input to thermal memory is defeated)
(See section 3.16)
This is the temperature value for the center point of the two part curve.
Limits: (RTD Bias Min Temp + 1) to (RTD Bias Max Temp – 1) in degrees C or F
Factory Value = 110
11*
RTD BIAS CURVE MAXIMUM RTD BIAS CURVE MAXIMUM
VALUE = XXX VALUE = XXX
(Not seen when RTD input to thermal memory is defeated.)
This setpoint is used to set the RTD bias maximum value (see Figure 3.4):
Limits: (RTD Bias Center Temp + 1) to 200° C (392° F )
Factory Value = 155
12
DEFEAT U/B INPUT TO DEFEAT U/B INPUT TO
THERMAL MEMORY ? XXX THERMAL MEMORY ? XXX
This code is used to defeat or enable the unbalance bias function. With this feature defeated the effect of
negative sequence unbalance is not included in the thermal memory:
YES - Unbalance bias defeated, thermal memory affected by average of three phase currents.
NO - Unbalance bias enabled, thermal memory affected by equivalent motor heating current (including
negative sequence contribution).
Note: Ensure that the proper value for the K factor is programmed in the following setpoint. The
K factor is used to bias the thermal memory as explained in section 3.20.
Factory Value = YES
13•
DEFAULT K VALUE = DEFAULT K VALUE =
This setpoint is used to select a value for the negative sequence unbalance K factor (see section 3.20):
175
K =
2
I
LR
1-19 (increments of 1)
Factory Value = 6
* Messages are not displayed when "RTD INPUT TO THERMAL MEMORY" (setpoints page 5, line 7) is defeated.
•
Message is not displayed when "DEFEAT U/B INPUT TO THERMAL MEMORY" is set to "Yes".
3-28
Setpoints, Pg. 5
C C
XX XX
; I is the locked rotor current value in per unit; I
LR
I (Amps)
LR
=
LR
I (Amps)
FLC