Page 2 - Techno Product Specification
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functional unit compartments shall include holes for ventilation. Ventilation holes shall
                also be provided on the side panels and barriers housing the main incoming device of the
                switchboard.

                Equipment mounting plates shall be at least 2mm thick.

                Arcing Fault Containment
                Outgoing functional units up to 630A shall be tested for internal arcing-fault containment
                in accordance with AS3439.1.2002 Annex ZD standard test at a prospective fault level of
                63kA. Explosion vents shall be provided at the top of the switchboard. In addition to this,
                the busbar chamber shall also be certified to contain an arcing fault at a prospective fault
                level of at least 63kA for a duration of not less than 110ms.

                External Doors & Covers
                Doors and covers shall be a minimum of 1.5mm thick. They shall include permanently
                formed  continuous  gaskets  made  of  high  grade  polyurethane  to  provide  firm  surface
                contact  and  sealing.  Clip  on  or  screw  on  gaskets  shall  not  be  accepted.  Doors  shall
                include concealed hinges made of aluminium with a choice of locks and handles. Doors
                may be hinged left or right. Door stays shall be used where necessary. Door stiffeners
                shall be used on all doors larger than 800mm width x 1600mm height.

                Covers shall have a minimum of 4 fixing points with the fixing screws and washers held
                captive. Covers 1800mm high and above shall be provided with hanging brackets.

                Metalwork Pre-Treatment & Colour
                All metalwork shall go through a rigorous pre-treatment process before powder coating.
                The framework, doors and covers shall be epoxy polyester powder coated in a smooth
                Grey  RAL7032  finish  (optional  Orange  RAL2000).  All  internal  separation  plates,
                equipment mounting plates and compartments shall be powder coated white.

                Busbars#
                Busbars shall be of rectangular cross section HDHC copper and be at least of 2 bars per
                phase  arrangement.  The  main  busbar  shall  be  fully  rated  with  the  rating  the  same
                throughout  the  entire  length  of  the  switchboard.  The  neutral  bar  shall  be  of  the  same
                current  rating  as  that  of  the  main  busbar.  The  busbar  system  shall  be  designed  to
                withstand a short circuit current of xxxkA for 1s.

                Vertical  and  main  busbars  shall  be  joined  by  standard  manufacturer’s  connectors  to
                ensure integrity of the rating and connection.

                # Option – Insulated Busbars
                Busbars shall be of rectangular cross section HDHC copper. The main busbar shall be
                fully rated with the rating the same throughout the entire length of the switchboard.  The
                busbar system shall be designed to withstand a short circuit current of xxxkA for 1s.

                Busbars shall be fully insulated. The insulation shall be of high quality heat shrink, flame
                retardant, self-extinguishing and rated for operating temperatures up to 125°C.

                Tests & Checks
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