Steel compact secondary substation Terra 4N

Type tested, ready to install compact secondary substation (CSS) in metal enclosure, for 400 kVA transformer, 3 panel 12/ 24 KV ring main unit or 12 kV switch disconnector.

The enclosure is divided into three compartments, one for the MV switchgear, LV switchboard and distribution transformer each. The weight of the CSS without electrical equipment is 1425 kg.

Dimensions (LxWxH)
Enclosure (6 degree roof): 2134 x 1834 x 2076 mm
Transformer compartment: 1290 x 1159 x 1789 mm

Max equipment

  • Transformer:
    400 kVA hermetically sealed oil transformer
  • MV Equipment:
    3 panel SafeRing 12 / 24 kV or NAL Cubicle 12 kV
    MV transformer cables are as standard 25 mm2 Cu. If the Tee-off is with a vacuum circuit breaker 95 mm2 Al cables will be installed.
  • LV Equipment:
           8 x 400 A InLine fuse switches
           5 x 400 A Kabeldon fuse switches
    The LV cables for a 400 kVA transformer are 1 x 240 mm2 per phase.  

Why ABB?

  • Type tested according to the latest IEC 62271-202 specifications
  • Internal arc fault Type AB tested at 20 kA, 1 second
  • No access to live parts
  • High level of safety for equipment and personnel
  • Ready to install unit complete with internal interconnections, wiring and earthing.  

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