Tunnel Transformers

TMC has designed and developed a low profile site transformer ideally used in space restricted areas and is approved by health and safety for use in Telecom tunnels etc.



Three phase double wound safety isolating site transformer to IP23.


400V 3-Ph protected by a 16A 3P type ’D’ MCB. Fitted with a 32A 400V 3P+N+E IEC309 Appliance Inlet


110V N.E Fitted with 4no. 16A 110V 2P+E IEC309 sockets protected in pairs by a 16A DP type ‘D’ MCB plus 2no. 32A 110V 2P+E IEC309 sockets protected individually by a 32A 2P type ‘D’ MCB


10 KVA continuous


H: 380mm, L: 700mm W: 330mm


PLEASE NOTE: Single phase 230-110v CTE version available


  • Low profile design for use in confined and enclosed areas
  • Inline tunnel cable exits
  • Rugged construction with safety treadplate on lid
  • Carry handles recessed under lid
  • Supplied with temporary lifting eyes (not shown)
  • Low Halogen materials used where practical
  • Standard specification as above but can also be tailor made to your requirements ie. additional sockets, MCB’s, RCD’s, appliance inlet etc.

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