AUWiring

Protection and testing charts

Fault-current and protection relationship charts for Australian worksheet review.

  • 1 charts
  • Australia

Protection and testing charts project basis

Fault-current and protection relationship charts for Australian worksheet review. These charts help confirm formula relationships, variable meanings and input basis before a calculator run or technical review.

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Confirm the nominal 230/400 V a.c. or project-specific voltage basis, 50 Hz context where applicable, phase arrangement, metric units, manufacturer information, DNSP or authority conditions and current project documents before applying a result.

Use the relationship beside the matching calculator input set, measurement record or worksheet. Do not treat a chart as equipment selection or installation approval.

Records covered

  • Fault-current relationshipRelationship chart for voltage, source impedance, transformer impedance and prospective fault current.Relationship chart · 2026-07-13

Review before applying

Protection and testing charts explain formula and measurement relationships. Use them with the matching calculator, entered project values and current Australian review context before carrying a relationship into a record.

Recheck the selected chart whenever the supply arrangement, equipment data, route length, tariff basis, measurement method or project document set changes.