3 SETUP AND USE Setpoints, Pg. 5
3-28
10*
RTD BIAS CENTER TEMP.RTD BIAS CENTER TEMP.
VALUE = XXX CVALUE = 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 MAXIMUMRTD BIAS CURVE MAXIMUM
VALUE = XXX CVALUE = XXX C
(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 TODEFEAT U/B INPUT TO
THERMAL MEMORY ? XXXTHERMAL 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 = XXDEFAULT K VALUE = XX
This setpoint is used to select a value for the negative sequence unbalance K factor (see section 3.20):
K =
175
I
LR
2
; I
LR
is the locked rotor current value in per unit; I
LR
=
I (Amps)
I (Amps)
LR
FLC
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”.
To Next Page
Loading...
