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PROTECTION CASES – CASS Series

The transformers can be protected in order to prevent any accidental contact between the parts under tension. The protections may be divided into two types: 1) partial: only on terminals; 2) total, in a metal case.
In the first type, the protection for the BBR terminals is IP20, in the
second type, regarding the case-placed transformer, it differs
depending on case type (as specified in the underneath table). The
case structure is in relation with the weight of the transformers that will
be installed. The cases for small transformers are equip with lifting
handles (on requested); in larger versions there are some eyebolts. All
cases are inclusive of cable-press with appropriate dimension to allow
the passage of the cables.
Normally, the cases are varnished internally and externally with RAL
7032 epoxy varnish.

IP: International Protection
We issue a brief explanation of the figures that appear after these two letters. The protection level is verified by two tests:

  • against penetration by solid external elements;
  • against penetration by liquids.

First figure is defined by standards CEI 70-1 – IEC 529 – IEC 144 – UTE C 20-010 – DIN 40050
Second figure is defined by standards CEI 70-1 – IEC 529 – IEC 144 – UTE C 20-010 – DIN 40050

  • Protection against penetration by solid external elements:
    • 0. Not protected.
    • 1. Protected against solid elements larger than 50 mm. (ex.: unwilled hand contact).
    • 2. Protected against solid elements larger than 12 mm. (ex.: finger).
    • 3. Protected against solid elements larger than 2,5 mm. (tools, threads).
    • 4. Protected against solid elements larger than 1 mm. (thin tools and threads)
    • 5. Protected against dust.
    • 6. Fully protected against dust.

 

  • Protection against penetration by liquids:
    • 0. Not protected.
    • 1. Protected against vertical tumbles of water drop.
    • 2. Protected against water drop tumbles up to 15° from vertical
    • 3. Protected against rainy water tumbles.
    • 4. Protected against water squirts from every direction.
    • 5. Protected against water jets from every direction.
    • 6. Protected against water jets similar to marine wave.
    • 7. Protected against immersion outcome.