3BHB003230R0101 5SXE05-0152 | ABB IGCT Module

The insulation requirement in the IGCT environment is a function of the maximum applied nominal voltage of the converter application itself. This voltage varies from a few thousand volts to several tens of thousands of volts over the IGCT application range. Hence, the requirements on insulation strength and distances can be very different. Furthermore, the power which needs to be transferred through the insulation interface is also strongly application dependent, and users are likely to require quite different insulation interfaces in terms of both power handling capability and insulation strength. As this also applies to the costs of the interface, standardisation of the insulation interface is difficult. This is why the IGCT gate unit does not provide an on-board potential separation. The gate unit power supply output as well as the supply cable must withstand the high voltage potential of the power semiconductor switch against all other relevant potentials in the converter.