Special Custom Build Solutions 3-phase up to 150kV.A

  • TSLtransformers design and manufacture three phase & hexaphase dry type transformers to your specific requirements rated from 150V.A through to 150kV.A at nominal frequency ranges up to 1000Hz. Design and manufacture is based upon the following basic criteria…


  • Open frame Class I (earthing required)

  • Enclosed class I (earthing required)

Power ratings (Core V.A)

  • “EI” shell type lamination, 4 limb, 150V.A ~ 25,000V.A

  • “Strip” core type lamination, 3 limb, 1,250V.A ~ 150,000V.A

Voltage ratings (prim input & sec output)

  • Safety isolating 0 ~ 50vac (ASNZS61558.2.6)

  • Isolating 51vac ~ 1000vac (ASNZS61558.2.4)

  • Isolating 1001vac ~ 15,000vac (IEC60076)

  • Auto non-isolating 0 ~ 1000vac (IEC61558.2.13)

Winding arrangements

  • Non-isolated (auto) STAR winding, vector group Yna0

  • Isolated Concentric (one above another), DELTA & STAR vector groups Dd0, Dyn11, Yyn0, Yd11

  • Isolated Zig-Zag, DELTA & STAR vector groups Dzn0, Yzn11

Insulation arrangements

  • BIL insulation coordination to 8kv / 50µS, thermal classes B, F & H (120~220ºC)

  • BIL insulation coordination to 10~25kv / 50µS, thermal classes F & H (155~220ºC)

  • BIL insulation coordination to 30kv / 50µS, thermal classes F & H (155~220ºC)


  • Flying leads 250mm off winding ≤500 amp, ≤15,000 volt

  • Terminal block style ≤32 amp, ≤450 volt, Terminal DIN rail style ≤300 amp, ≤800 volt