Copper Braided Flexibles

For Sandwich Busbar Trunking System connections with Transformer or Panel or DG or End Feed Unit; Copper Braided Flexibles are recommended, because it has advantages as mentioned above.

Braided Flexibles get terminated properly even if there is small variation in location of any electrical equipment (i.e. Transformer or Panel or DG or End Feed Unit)

Copper braid is manufactured by weaving strands of copper wire together. The flexibility of the braid is determined by the diameter of the copper wire. The smaller the wire the greater the flexibility and the larger the volume occupied by the braid and the more expensive the braid becomes (e.g. 42SWG wire have more flexibility than 38SWG wire and more expensive too). Flexibility is also determined by the type of weave.

The main purpose of braided flexible connectors is to deliver maximum power output, even during peak performance. In those sectors, where the demand of power is much, and the wires experience considerable load, then braided flexible connectors can be an efficient solution for optimal power output.

Some of the advantages of using braided flexible connectors are:

• Control and absorb the vibrations
• Manage the natural expansion and compression of wires during power transmission
• Provide minimum resistance
• Minimum millivolt drop
• Excellent Flexibility

Cross section of a braid wire is calculated as follows:

Where:

Np = No. of primary bunches

Na = No. of Auxiliary bunches

Ns = No. of strands per aux. bunch

d = Strand diameter

Note:

Meaning of Strand is Copper Wire.

Auxiliary bunch means the bunch of strands (copper wire)

Primary bunch means the bunch of Auxiliary bunch

Following table from IEC-61439 Part-1 standard displays the maximum recommended / permitted current rating for respective cross section area of braid.