About Electrical Clearance and Creepage Analysis
The electrical clearance is the electrical isolation between two conductive components, whereas the creepage indicates the conduction of electricity across the surface of a nonconductive component. The clearance and creepage distance are two important parameters while designing an electrical assembly. The clearance or creepage analysis involves comparison of the measured clearance or creepage distance with a specified threshold value of clearance or creepage.
You can analyze the clearance and creepage distances between components, quilts, and nets. You can group multiple components into nets and perform the analysis for pairs of nets. Otherwise, you can directly analyze for a pair of components or quilts. Components such as fuses, which have both conductive and nonconductive surfaces, can contain quilts to ensure accurate component analysis.
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The Clearance and Creepage Analysis consists of four stages:
• Stage 1—Creating a clearance and creepage file
• Stage 2—Creating nets and defining net pairs
• Stage 3—Performing the clearance analysis or creepage analysis or both
• Stage 4—Reviewing the results and generating a report
This analysis is based on following assumptions about the assembly:
• Any two components that are in contact with each other are not bonded or uncemented.
• The conductivity of any component is uniform throughout it. Each component is either considered as a complete conductor or as a complete insulator.