Holduct - Holduct Bus Ducts and Busbars

Holduct engineers and manufactures metal enclosed bus duct systems based on: Isolated Phase Bus ducts (IPB), Nonsegregated Phase Bus ducts (NPB), Segregated Phase Bus ducts (SPB) and cast-resin insulated busbars. Bus ducts are supplemented with associated equipment to form turnkey systems. The bus ducts meet IEC and ANSI standards.

ISOLATED PHASE BUS DUCT

Our isolated phase bus duct type HOIO is a metal enclosed conductor, in which each phase-conductor is enclosed by an individual metal housing separated from the adjacent conductor housing by an air space. The bus duct is self-cooled. Conductors are supported by porcelain or cast-resin insulators. Aluminum is a typical material for both conductors and enclosures. Welding is used to assemble bus duct sections onsite.

This conductor has an application range of 36kV: 24kA.

NONSEGREGATED PHASE BUS DUCT - RECTANGULAR

The nonsegregated phase bus duct in rectangular enclosure type HONR is a metal enclosed conductor in which all phase conductors are in one common metal enclosure without barriers between phases.

This bus duct is self-cooled. Conductors are supported by porcelain or cast-resin insulators. Aluminum or copper is used as a current conductor and enclosures are made of aluminum. Bolting is used to assembly bus duct sections onsite.

Segregated phase bus duct with barriers between phases is offered optionally.

Insulated current conductors are offered as an option. The rectangular nonsegregated phase bus duct has an application range of 36kV: 5kA.

NONSEGREGATED PHASE BUS DUCT - TUBULAR

This nonsegregated phase bus duct in tubular enclosure type EHON is a metal enclosed conductor, in which all phase conductors are in one common metal enclosure without barriers between phases.

This bus duct is self-cooled and conductors are supported by porcelain or cast-resin insulators. Aluminum or copper are used as current conductor and enclosures are also made of aluminium. Bolting is used as the assembly method. Advantages of tubular its shape are:

• Higher current ratings
• Better shape utilization
• Longer self-supporting length
• Lower magnetic field intensity outside enclosure due to self-compensation effect

A segregated phase bus duct with barriers between phases is offered optionally.

Insulated current conductors are offered as an option. The application range is 36kV: 12kA.

CAST-RESIN INSULATED BUSBARS

Our cast-resin insulated busbar system type EB has been designed mainly for power connections between low-voltage switchgear and transformer or other switchgears. This system is simple for assembly and is largely maintenance-free and no spare parts are required.

It has low impedance, resistance to chemical, industrial corrosion, climatic conditions and electric arc. The whole package is enclosed within aluminum to lock the magnetic field inside. The conductors are made of either aluminum or copper. The busduct is delivered in pieces to be assembled onsite using bolts and cast-resin composition. All necessary accessories come with our delivery together with detailed assembly manual. The application range is 1kV: 6.3kA.