IEC 60664-4 Insulation Coordination for Equipment in Low Voltage Systems - Part 4: Consideration of High Frequency Voltage Stress

The IEC 60664-4 standard deals with basic, complementary and reinforced insulation subjected to high frequency voltage. stress in low voltage equipment. The sizing values ​​apply directly to the basic insulation; Additional requirements for reinforced insulation apply according to Part 1. It is applicable for sizing gaps, leakage distances and solid insulation stressed by any periodic voltage with a fundamental frequency above 30 kHz and up to 10 MHz.

This part of IEC 60664 may only be used in conjunction with IEC 60664-1 or IEC 60664-5 (referred to as Part 1 or Part 5 in this standard). By using Segment 1 or Segment 5 with this part, the frequency limit of Segment 1 or Segment 5 is extended to frequencies higher than 30 kHz.

This section also applies to Section 30 for frequencies greater than 1 kHz and type 3 protection. This question is being evaluated for type 2 protection. Sizing values ​​are evaluated for frequencies above 10 MHz.

This standard does not take into account high frequency emission to the grid. In normal use of the equipment, interference from high-frequency voltages radiating into the mains is assumed to be negligible in terms of insulation stress. It is therefore not necessary to consider.

Applies to equipment with rated voltage up to AC 1 000 V for use at altitudes up to 2000 m above sea level. Specifies requirements for clearances, leakage distances, and solid insulation for equipment based on performance criteria. It includes electrical testing methods in relation to insulation coordination.

The minimum gaps specified in this section do not apply where ionized gases are formed. Special conditions for such cases may be determined at the discretion of the relevant technical committee. This part does not deal with distances through − liquid insulation, − gases other than air, compressed air.

Higher voltages may be present in the equipment's internal circuits. The purpose of this standard is to guide the technical committees responsible for the different equipment to rationalize their requirements to achieve insulation coordination. To indicate air gaps, leak distances, and solid insulation for equipment.

Our organization, among numerous test, measurement, analysis and evaluation studies, with its trained and expert staff and advanced technological equipment, within the framework of national and international standards, IEC 60664-4 Insulation Coordination for Equipment in Low Voltage Systems - Part 4: High Frequency Consideration of Tension Stress provides testing services.