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Home › Products › TransformersThree-Phase Transf.STT/500 Family

Safety Isolating Three-Phase Transformers

STT/500 Family

  • Safety isolating transformers built according to standards IEC 61558-1, IEC 61558-2-4 (CEI 96.2) for powers up to 10 KVA
  • Single voltage input max. 1000V
  • Single voltage output max. 50V
  • Class F insulating materials
  • Ambient temperature max. 35 °C
  • Input/output connectors on terminal block rails or boards with brass screws
  • Polycarbonate protection with board and brass screws, against accidental contacts
    in assembling
Reference Number Rated Output Dimensions Drillings Dissipated Power (W) Efficiency % Weight Kg Fig.
L P H A B G F
STT/501 160 VA 140 90 135 125 53 14 7 19 88,2 5,2 3/5
STT/502 250 VA 180 90 160 150 66 18 7 26 89,6 6,5 3/5
STT/503 400 VA 180 110 160 150 86 18 7 36 91 9,5 3/5
STT/504 630 VA 180 120 160 150 96 18 7 48 62,4 12 3/5
STT/505 1000 VA 240 130 210 200 96 18 7 73 92,7 18 3/5
STT/506 1600 VA 240 155 210 200 121 18 7 101 93,6 26 3/5
STT/507 2500 VA 300 144 260 250 124 24 9 143 94,3 34,3 3/5
STT/508 4 kVA 360 160 310 325 126 24 9 176 95,6 46,3 4/5
STT/509 6,3 kVA 360 170 310 325 136 24 9 233 96,3 56,9 4/5
STT/510 10 kVA 360 180 310 325 146 24 9 309 96,9 74,5 4/5
STT/511 16 kVA 420 200 360 375 164 30 10 450 97,2 105 4/5

The STT/500 transformers are built according to the CE standards CEI 96-2 and international standards IEC 61558-1 and IEC 61558-2-6 .
Standards for safety transformers reach up to the power of 16KVA (see Table). For exceeding powers, other standards must be taken into consideration; although, prior to agreement with manufacturer, transformers with exceeding powers can be built by following the same standards, assembly and testing levels.
This family features a single-voltage input up to 1000V and an output with a max. voltage of 50V AC or 120V ripple free DC between conductors or between any conductor and earth. It is also possible to produce three-phase safety transformers with multi-voltage inputs and outputs (maintaining the above mentioned limits) or with more outputs (where the total voltage remains within these values).
The power values stated on the Table are given according to CE standards, but that does not exclude the possibility in producing transformers of any power, remaining in the 16 KVA limits, prior to agreement with manufacturer.
If the output is star connected, neutral is always supplied in the terminal block.

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