Non-segregated phase bus / AC bus
The AC bus duct supports voltages up to 1058 VAC and currents up to 3000 A. It has all phase conductors in a single enclosure with air space between them, without metallic barriers. Conductors are mounted on custom-molded fiberglass-reinforced polyester blocks. The bus duct is designed to connect transformers to 12-pulse or 6-pulse converters.
DC bus
The DC bus duct supports voltages up to 1200 VDC and currents up to 15,000 A. It meets most DC application needs, with each pole in a separate enclosure. The DC bus duct is designed to connect converters to positive and negative DC switchgear assemblies.
Non-ventilated enclosure
The enclosure is constructed in order to provide no intentional circulation of external air through it. Ventilated enclosures can be provided for indoor applications.