Creepage Distance Calculator (IEC 60815 Standard)
Estimate minimum insulation creepage distance according to IEC insulation coordination standards.
Use this creepage distance calculator to estimate minimum creepage distance based on system voltage and pollution level according to IEC 60815 guidelines.
Environmental & System Specs
Operating Voltage
kV
Pollution Assessment (IEC 60815)
Insulation Requirements
IEC Standard
Minimum Creepage Distance
480
mm
Shortest path along the solid insulation surface
What about Clearance?
While Creepage is measured along the surface, Clearance is the shortest straight-line distance in air. A rough estimate for phase-to-phase clearance in MV systems is typically around 220 mm (based on standard Basic Insulation Levels).
Design Parameters Used
Reference Data
Specific Creepage
20
mm/kV
Multiplier per IEC 60815
System Um
24.0
kV
Highest line-to-line voltage
Engineering Reference
Creepage Formula
D = Um × Specific Creepage
Um (Highest System Volts)
Um ≈ Un × 1.15 to 1.2
- D = Minimum Creepage Distance (mm)
- Um = Highest System Voltage (kV rms)
- Un = Nominal System Voltage (kV rms)
- Standard = IEC 60815 / IEC 60664-1