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

Abstract

The International Electrotechnical Commission (IEC) standard IEC 60664: Insulation coordination for equipment within low-voltage systems specifies the requirement for clearances, creepage distances, and solid insulation for equipment based upon their performance criteria.

Motor drive systems typically consist of high-voltage and low-voltage subsystems. Such systems demand reliable galvanic isolation to isolate high-voltage circuits from low-voltage circuits.

To better assimilate the method to calculate the insulation distances when designing the circuit board in motor drive system, this document aims to present the insulation design guide and example to meet the requirement coming from IEC60664-1.