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Address A18B, Marsa Industrial Estate, Marsa , MRS 3000 , Malta

400A, Auxiliary Supply Panel

This panel was built to provide auxiliary supply in a 132/33kV Distribution Centre.  In view of the critical function provided, continuity of supply was an essential design aspect. The panel had 2 transformer incomer sources from two different 11kV networks.  One transformer was on standby.   Furthermore, a generator backup made up the 3rd source in the event that both transformers were lost. The interlocking and sequencing of the source supply was controlled by a PLC in addition to a manual override via a selector switch.

The switchboard has a Form 4 layout.  Circuit breakers and contactors are Schneider Electric and Allen Bradley PLC.

Technical data
  • Type
    400A, Twin Transformer Incomers and Generator Supply
  • Rating
    400A, 400V 50Hz, TPN&E
  • Main Circuit Breakers
    2x400A, 4P, 50kA (Icu) & 1x250A, 4P, 36kA (Icu)
  • Busbar Rating
    400A, TPN&E
  • Installation
    Indoor (Floor mounting)
  • Dimensions
    2090mm(H), 1770mm(W), 910mm(D)
  • Material
    2.0mm Aluzinc sheet steel, powder coated to RAL 7032
  • IP Rating