Motor Analyzer
Motor Measurements
3
Motor Measurements
Table 1 is a list of supported motors:
Table 2 is a list of the range and accuracy of the Motor Analyzer-specific functions. See Specifications in the
Fluke 430 Series II Users Manual for the specifications of the other functions.
Table 1. Motor Configurations
Motor type 3-phase asynchronous
Motor measurement connection 3-Wire Direct on Line or 3-Wire connected to VSD
Motor winding connection WYE or Delta
Table 2. Motor Analyzer Range and Accuracy
Motor Measurement Range Resolution Accuracy Default Limit
Mechanical Motor Power
0.7 kW to 746 kW 0.1 kW ±3 %
[1]
100 % = nominal power
[2]
1 hp to 1000 hp 0.1 hp ±3 %
[1]
100 % = nominal power
[2]
Tor que
0 Nm to 25 000 Nm 1 Nm ±5 %
[1]
100 % = nominal torque
[2]
0 lb ft to 18 500 lb ft 0.1 lb ft ±5 %
[1]
100 % = nominal torque
[2]
rpm
1 rpm ±3 %
[1]
100 % = nominal rpm
[2]
Direct on Line 000 rpm to 3600 rpm
VSD 500 rpm to 4140 rpm
Efficiency 0 % to 100 % 0.1 % ±3 %
[1]
NA
Unbalance (NEMA MG 1) 0 % to 100 % 0.1 % ±0.15 % 5 %
Harmonics Voltage Factor
(NEMA MG 1)
0 to 0.20 0.01 ±1.5 % 0.15
Unbalance Derating Factor 0.7 to 1.0 0.1 indicative NA
Harmonics Derating Factor 0.7 to 1.0 0.1 indicative NA
Total Derating Factor 0.5 to 1.0 0.1 indicative NA
[1] Add 5% error when selecting Motor design type Other
Specification valid for Motor Power >30 % of rated power, when operating at <30 % of rated Motor
Power, the mechanical motor power accuracy is ±3 % +0.7 % of rated power and torque accuracy is
±5 % +1.5 % of rated torque.
Specification valid at stable operating temperature. Run the motor for at least 1 hour at full load
(2-3 hours if the motor is 50 HP or higher) to obtain stable temperature.
Motor must be in near steady state mechanical condition.
[2] For Direct Online Motors the nominal values are identical to the rated values on the Motor Nameplate.
For VSD driven motors the nominal values are based on the actual motor frequency.
Notes:
• Rated torque is calculated from rated power and rated speed.
• Update rate of Motor Measurements is 1x for each second.
• Default Trend duration is 1 week.
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