Motor starting methods
Motor starting-method record terms for Australian starting-current and voltage-dip worksheets.
Motor starting methods and current behaviour
Define starting-method record terms without selecting a starter or certifying a motor-starting design.
| Method | Record | Used with | Boundary |
|---|---|---|---|
| Direct on line | DOL or across-the-line start where the project uses that method. | Starting-current and voltage-dip checks | Actual starting multiple depends on motor and supply data. |
| Star-delta | Starter method and transition assumptions where known. | Starting-current review | Transition behaviour needs starter and motor data. |
| Soft starter | Ramp or current-limit setting where available. | Voltage-dip and generator-starting records | Use product settings rather than generic assumptions. |
| Variable speed drive | Drive-fed motor context and supply-side notes. | Load, harmonic and starting records | Drive behaviour is product and settings dependent. |
| Auto-transformer or reduced-voltage start | Reduced-voltage method and tap/setting if documented. | Starting-current worksheets | Project equipment data controls interpretation. |
- Use this table to keep starting-method assumptions visible.
- Starter choice and settings require product, supply and project review.
Where starting context affects voltage-dip checks
Use the starting method to frame expected inrush and voltage-dip behaviour before checking the actual motor and supply record.
| Item | Value |
|---|---|
| Purpose | Define starting-method record terms without selecting a starter or certifying a motor-starting design. |
| How to use the source | Term table only; starting-current and voltage-dip arithmetic lives on calculator pages. |
| Standards and project context | Australian project context; manufacturer instructions, supply authority and project requirements govern starter selection. |
| Where judgement is still needed | Use this table for lookup, labelling or worksheet context; do not treat it as a project-specific calculation result. |
| Before relying on it | Confirm current standards, local authority requirements, DNSP conditions, project documents and manufacturer data before relying on a decision. |
Product record basis for starting methods
Keep the product or project source, checked date and installation scope visible when using a starting method.
| Item | Value |
|---|---|
| Source | AUWiring motor starting-current and voltage-dip calculator field models. |
| Source type | Project or product record model |
| Derivation basis | AUWiring terminology table for motor-starting records; manufacturer data and starter selection rules are not reproduced. |
| Last checked | 2026-07-13 |
| Review interval | Annual or when motor calculators, starting-method wording or product-record practice changes. |
| Review trigger | Calculator field change, product-data convention change, starter terminology change or project feedback. |
| Version used | R22-2026-07-13 |
| Australian application | Australia; motor product data, starter type, supply constraints and project requirements can override general notes. |