Square Automation Pvt. Ltd.

Thursday, 19 Apr 2018
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Bus Ducts up to 6000 Amps.

The Busduct is metal clad totally enclosed dust & vermin proof air insulated for use on 415 Volts 50 Cycles AC supply.

The Busduct is designed for operation in high ambient temperatures and high humidity tropical atmospheric conditions. Means are provided to facilitate ease of inspection, cleaning and repair, for use in installations where continuity of operation is of prime importance.


The Busduct are fabricated from 2mm thick CRCA sheet steel with Louvered covers on both sides of Busduct for proper heat dispensation, Busduct have top and bottom covers for visual inspection/maintenance. Rubber Bellows for enclosure shall be provided for avoiding DG/TG set vibration to travel into the Busduct.


The busbar shall be air insulated and made of high conductivity, high strength aluminum alloy complying with the requirements of Grade E91E of IS:5082 or E.C. grade copper as required.

The Busbar shall be suitably braced with non-hygroscopic Epoxy/SMC supports at suitable intervals in order to withstand the dynamic forces of Short Circuit at 50KA RMS, Symmetrical for one sec. Large clearances and creepage distances shall be provided on the Busbar system-to minimize the possibility of a fault as per the relevant Indian Standard.

The orientation of Busbar shall be R-Y-B-N or Interleaved i.e. R-B-Y-N-R-Y-B.

The cross section of busbars for various rating are calculated approximately on the basis of 0.8 Amp. per sq.mm for Aluminium and 1.6 Amp. per sq.mm for copper. The Busbar has a continuous current rating throughout the length of Busduct and the neutral busbar also has a continuous rating of at least 50% of the phase busbars. The Busbar is color coded for identification of individual phases and neutral. The Busbar is insulated with insulation tape or heat shrinkable PVC Sleeves or painted with Matt Black Paint.


All steel work used in the construction of Busduct is thoroughly cleaned to remove all rust, scales, grease and other foreign matters. This is done by treating the sheet steel by Eight Tank Process as per the IS:3618.

The sheet steel is then given a coat of highly corrosion resistant primer and then a coat of seimens grey and finally Powder Coated to the specified shade of IS:5.

End termination/Expansion Joints:

The busduct is provided 'AL/'CU' flexibles at the ends for proper alignment. After every 6 meters, of straight length portion, Expansion joints are provided for adjusting the expansion of the Busbars.

Optional Accessories:

  • Phase Cross over (RYBN - NBYR)
  • Neutral Cross Over (NRYB-RYBN)
  • Seal of Bushing
  • Fire Proof Barrier
  • Canopy for outdoor portion
  • Silica Gel breather
  • Space Heater with thermostat
  • Wall frame Assembly


Routine tests shall be conducted on the Busduct:

  • Inspection of the Busduct (physical)
  • Dielectric Tests at High Voltage
  • Insulation Test at 1000 volt