438-II
Users Manual
4
Motor Setup
The motor nameplate provides information for the measurement algorithm. This information determines the
mechanical parameters from the electrical signals that are used for measurements. It is critical that you
enter the nameplate settings accurately to obtain accurate readings.
To open the Motor Setup screen:
1.
Push
. The MENU screen opens.
2.
Push
to change the page view.
3.
Use
to move through the menu selections and highlight
Motor Analyzer
.
4.
Push
to open the Motor Setup screen.
Table 3 is a list of the supported motor operating ranges.
Note
pU (per Unit) = Measured value / Rated value
Table 4 is a list of the operating ranges for variable speed drives.
5.
Use
to enter the motor nameplate parameters.
The Motor Analyzer supports motor designs according to NEMA and IEC design types. See Table 5 and
Table 6. If the design type is unknown, select
Other
. When set to Other, you must consider an additional
error of +5 % for the mechanical motor parameters.
Table 3. Motor Operating Range
Motor Operating range
Direct on Line
VFD
Voltage (pU)
50 Hz motors
0.9 to 1.1
0.7 to 1.2
60 Hz motors
0.9 to 1.1
0.58 to 1.2
Current (pU)
0 to 1.7
0 to 1.7
Input Power (pU)
0 to 2.2
0 to 2.2
Frequency
50 Hz or 60 Hz
40 Hz to 70 Hz
Voltage Unbalance (%)
0 to 5
0 to 5
Voltage THD (%)
0 to 20
0 to 25
Table 4. VSD Operating Range
Drive Operating range
VFD
Note
Over/Under Voltage from Nominal V/f
Curve (%)
-15 to +15
The lower limit applies up to rated frequency; above rated
frequency the saturation of the V/f curve is accommodated
Carrier Frequency (kHz)
2.5 to 20
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