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Technical
Specifications of L.T. Switchgear
Market Network
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The Panels shall be suitable for operation at 415 + 6% volt, 50 Hz, 3 Phase, 4 wire + E
system.
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The Panels offered shall be fabricated out of 2mm/1.6mm M.S Sheet and shall have modular construction.
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Panels will be free standing, floor mounting type having provision for cable entry from bottom or top as per your requirement.
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The Panels will be extensible type in design with dust and vermin proofing.
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The Panels will be in Fixed Type or Draw Out Type execution as per requirement.
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Sheet Metal Work
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The Switchgear frame shall be fabricated using mild steel structural sections of pressed and shaped cold rolled steel of thickness not less than 14
SWG.
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Frame shall be enclosed by sheet steel of thickness not less than 14 SWG cold rolled smoothly finished levelled and free from
flaws. Doors & covers shall be made of sheet steel of thickness not less than 1.6mm cold rolled sheet. Stiffeners shall be
provided wherever necessary.
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Cut-outs shall be true in shape and devoid of sharp edges.
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The complete structure shall be rigid, self supporting and free from twists and bends.
Painting
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Entire sheet metal work will undergo pre-treatment covering degreasing, water
sinsing, derusting / phosphating using various tanks installed in Paint Shop.
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After pre-treatment as described above, the sheet metal is sprayed with high corrosion resistant Etch Primer. The finishing treatment shall be application of air drying paint after necessary putty work.
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We also have Electrostatic Powder Coating plant, Pune and as such are in a position to supply you POWDER COATED Panels in desired shade.
Panels Will Be
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of the metal enclosed, indoor, outdoor, floor mounted modular type construction.
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of dust and vermin proof construction.
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provided with labels on the front indicating the switchgear designation.
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of uniform height of not more than 2450 mm.
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provided with bus bars running all along the length of the panel.
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shall be provided with doors having hinges and captive screws.
Bus Bars
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Bus Bars shall be of uniform cross-section throughout the length of the switchgear.
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Bus Bars shall be of high conductivity copper alloy as per IEC & BS requirement.
In case of copper, current density will be equal to or less than 1.5 Amps per sq. mm
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All Bus Bars will be air insulated and will be black painted for better heat dissipation. Bus Bars will be codified in Red, Yellow, Blue and Black colour as per standard practices.
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Bus Bars shall be adequately supported and braced to withstand the stresses due to a fault level
Internal Wiring
Wiring inside the switchgear shall be carried out with 1100/650 volt grade, PVC insulated, stranded conductor wire of adequate sizes. Minimum size of conductor for power circuits will be 2.5 Sq. mm copper. Control circuits will be wired with copper conductor of at least 2.5 sq. mm for CT circuits and 1.5 Sq. mm for other circuits.
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