BENSHAW RediStart EXEXMVRMX3 Series, User Manual

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RTD Voting RTD 25
LCD Display
Range Disabled, Enabled (Default: Disabled)
Description RTD Trip voting can be enabled for extra reliability in the event of a RTD malfunction. When RTD voting is
enabled, two (2) RTDs in one assigned group will need to exceed their trip temperature before a fault is
declared.
z
NOTE:
If there is only one RTD assigned to a group the RTD voting will be disabled.
RTD Motor OL Biasing RTD 26
LCD Display
Range Off, On (Default: Off)
Description
When RTDs are present, active, and assigned to the stator group and when RTD biasing is enabled the stator
RTD measurements will effect the motor OL content. RTD biasing works together with the I
2
t thermal model
of the motor. In the RTD biasing case a three point approximation of motor overload capacity based on the
highest measured stator RTD temperature is used. If the RTD motor overload capacity calculation exceeds
the I
2
t based calculation then the RTD biasing value will be used. If the I
2
t value is higher then the I
2
t value
will be used.
See Also
RTD Biasing OL group in section 7.1.7, on page 118.
RTD Bias Minimum Level RTD 27
LCD Display
Range 0 – 198
o
C (Default: 40
o
C)
100
6 - PARAMETER DESCRIPTION
RTD: RTD Voting
25
Disabled
RTD: RTD Biasing
26
Off
10
0
20
30
40
50
60
70
80
90
100
0 50 50 100 150 200 250
Maximum RTD Temperature (C)
RTD
B
ias
V
alue
(%)
Hot/Cold Ratio
RTD BiasMin
RTD BiasMid
RTD BiasMax
RTD Bias Curve
Setpoints
RTD27 = Bias Minimum Level Setpoint
RTD28 = Bias Midpoint Level Setpoint
RTD29 = Bias Maximum Level Setpoint
RTD: RTD Bias Min
27
40 C