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Motor starting

Assess starting current, acceleration and voltage dip.

IEC 60034 · NEC 430
Motor Nameplate
Rated power
kW
Power unit
Rated voltage
V
Phases
Frequency
Efficiency η
·
Power factor
cos φ
Synchronous speed
rpm
Full-load speed
rpm
Starting Method
Method
Load & Source
Motor inertia J_m
kg·m²
Load inertia at motor shaft J_L
kg·m²
Load profile
Load torque at motor shaft
N·m
Source SCC
MVA
PCC voltage
V
Allowable Vd
%
Jurisdiction

Results

Review starting performance and supply limits.

solved
Detailed analysis Protection, compliance, method comparison and audit
IEC 60034-12 · NFPA 70 §430

Document

Record project details and calculation notes.

Audit-ready sheet
Notes
  1. Motor performance per IEC 60034-1:2022.
  2. Locked-rotor current and torque per IEC 60034-12:2016 / NEC Table 430.7(B).
  3. Voltage dip is a simplified PCC screening — confirm against utility limits and cable-impedance study.
  4. Acceleration time uses the average-torque method; verify against the manufacturer torque-speed curve and locked-rotor withstand t_E.
References
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— · Rev A · — Report Print / Save as PDF A professional aid, not engineering judgement — you remain responsible for verifying every input and result against the standards that apply to your work.