ZHENDA busbar trunking system introduction

Busbar trunking system (BBT) performs the function of transporting current form one point to the other. Traditionally cables were used for this function. BBT goes beyond what cables do. BBT can tap off power to switchgear for further distribution using tap of boxes. In comparison to cables, BBT can thus serve as distribution panels at different stages (at floors of a building). BBT thus continues as single systems to replace cables as well as distribution boards at floor level for building (commercial or industrial).

ZHENDA Group introduces world-class sandwich Busbar Trunking System (BBT) under the brand ‘ZHENDA’ to its valued customers. The BBT is totally enclosed, non-ventilated design busbar and is fully insulated using halogen free fire retardant epoxy insulation. ZHENDA BBT system offer a superior alternative to cables and other bus trunking options through this compact and scalable range of system thus providing an enhanced solution to power transmission and distribution in buildings as well as industry.

Busbar trunking system is of two types:

1) Sandwich: Epoxy or Cast Resin type

2) Air Insulated: Fabricated Air Insulated type

Sandwich Busbar trunking system is preferred widely due to its advantages over Air insulated busbars as well as cables, some of which are mentioned below.

Benefits of Sandwich Construction:

1) Compactness: Sandwich construction render to the BBT system more compact than air insulated bus bar system, thus making them a preferred choice in plant room and building applications.

2) Energy efficiency:  Compactness of sandwich construction results in higher efficiency due to lower voltage drop and impedance. This ensures all connected equipment run cooler.

3) Flexible: Additions of floor to a building or any expansion to an existing system is extremely simple with sandwich BBT. They are scalable & elegant.

4) Safe & Sure: Higher mechanical strength over long runs, better electrical conductivity and lower mV drop which ensures high reliability. Ability to withstand high short circuit currents make them doubly safe.

5) Fire retardant:  Sandwich construction do not have air gap due to which natural progression of fire is inhibited. Epoxy insulation, being flame retardant provides better resistance to spread of fire.

6) Economical: Inherently flexible design ensures easy installation and maintenance thus resulting in lower installation and maintenance costs.


ZHENDA busbar trunking system is of sandwich construction, totally enclosed, well insulated design. It is used (as feeder busbar) for interconnection between transformer/generator to power distribution centers and as plug-in (busbar risers) in building power systems. Cast resin busduct are also available for outdoor application. These busducts are suitable for operation in a 600/1000V system.

The diagram below familiarizes you with ZHENDA busbar trunking system: