Calculator #009Motor sizing3-phase, 50/60 Hz, up to 1 kVIEC 60034

Three-phase induction motor sizing - IEC 60034, 0,12 to 1 000 kW, up to 1 kV

Preliminary motor output selection with direct-on-line and VFD scenarios. IEC 60034 defines rated output as shaft power; preferred output values are from IEC 60072-1, while efficiency, power factor, VFD overload, starting torque and load torque remain project/manufacturer inputs.

Developed by the ieccalc.com engineering team

Questions and corrections — forum

Input

Required shaft load, kW

Design margin

Installed motor output, kW

Line voltage, V

Efficiency eta

Power factor cos phi

Efficiency class

Poles

Supply frequency, Hz

Drive type

Starting current multiple

VFD overload, %

Source Ik, kA

Voltage dip limit, %

Duty/load cycle, %

Start torque, % FLT

Load torque, % FLT

Site altitude, mIEC 60034-1:2017, 6.2 rates the machine to 1 000 m.

Site ambient air temperature, CIEC 60034-1:2017, 6.3 rates the machine to 40 C.

Thermal classSelects the Table 11 column.

Manufacturer derating factorVendor data. IEC 60034-1 gives the criterion, not a factor.

Feeder length, m

Result

PRO - schedule and report

FREE performs one complete motor check. PRO adds motor schedules, feeder summaries and shared editable reports.

Glossary

Built-in validation tests

#	Case	Expected	Computed	Status