SLUAAR5 august   2023 ISO5451 , ISO5452 , ISO5851 , ISO5852S , ISO7741 , ISO7810 , ISO7820 , ISO7821 , ISO7830 , ISO7831 , ISO7840 , ISO7841 , ISO7842 , UCC23513 , UCC5310 , UCC5320 , UCC5350 , UCC5390

 

  1.   1
  2.   Abstract
  3. 1Introduction of Key Terms in IEC60664
    1. 1.1 Clearance and Creepage
    2. 1.2 Insulation Type
    3. 1.3 Decisive Voltage Class and Extra-Low Voltage
    4. 1.4 Protection Class
    5. 1.5 Pollution Degree
    6. 1.6 Overvoltage Category
    7. 1.7 System Voltage
    8. 1.8 Working Voltage and Voltage Block
  4. 2Insulation Distance Definition
    1. 2.1 Clearance and Creepage Determining Process
    2. 2.2 Clearance and Creepage Determining Method Example
  5. 3Summary
  6. 4Reference

2.1 Clearance and Creepage Determining Process

Normally, the product specifications contain sufficient information allowing insulation coordination definitions such as:

  • Functional blocks on circuit board
  • System Voltage
  • Environment conditions (pollution degree) for circuit board
  • Mechanical constrains around circuit board. For example, limited height, closed to the conductive parts connected to earth

The process of the insulation distances determining is shown in Figure 2-1.

GUID-20230818-SS0I-KTCQ-BSLB-08FQZX98MBRL-low.svg Figure 2-1 Insulation Distance Determining Process