Motor Starting
Screen motor inrush, voltage sag, and acceleration time against project criteria.
1. Study Criteria
2. Motor Inputs
Select motors and complete all highlighted study inputs. Values loaded from the One-Line remain editable for this study run.
Load motors from the active One-Line Diagram to begin.
3. Results
No study has been run.
Supported Starter Types
Choose a starting method for each motor above. The study applies these screening models:
| Starting Method | Inrush Model | Key Parameters |
|---|---|---|
dol (default) |
Full locked-rotor current (6× FLC typical) | inrushMultiple |
vfd |
Current limited to vfd_current_limit_pu × FLC (default 1.1×) |
vfd_current_limit_pu, ramp_time_s |
soft_starter |
Voltage ramps from initial_voltage_pu to 1.0; starting current ∝ V and torque ∝ V² |
initial_voltage_pu (0.3), ramp_time_s (10) |
wye_delta |
Inrush = Ilr ÷ 3 during wye phase; full inrush after switch | wye_delta_switch_time_s (5) |
autotransformer |
Inrush × tap²; typical tap 0.65 | autotransformer_tap (0.65) |