Technical information

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1SDC210033D0202
G1.9 Tropicalization
All the Tmax XT series circuit-breakers can be used in the most critical environmental condi-
tions defined by the following standards:
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IEC 60721-2-1 (climatogram 8);
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IEC 60068-2-30;
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IEC 60068-2-2;
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IEC 60068-2-52.
Tropicalization is guaranteed by:
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moulded-case made of synthetic resins reinforced with glass fiber;
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rust-preventive treatment on the main metal parts;
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Fe/Zn galvanisation (UNI ISO 2081), protected by a conversion layer free of hexavalent
chrome (in compliance with ROHS) with the corrosion resistance guaranteed by ISO 4520
class 2c;
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application of anti-condensation protection for electronic trip units and relative accessori-
es.
G1.10 Resistance to impact and vibrations
In compliance with IEC 60068-2-6 standards and with the regulations established by the
most important classification bodies (RINA, Det Norske Veritas, Bureau Veritas, Lloyd’s Reg-
ister of Shipping, Germanischer Lloyd, ABS and the Russian Maritime Register of Shipping),
all the Tmax circuit-breakers are unaffected by mechanically and electromagnetically gener-
ated vibrations.
G1.11 Degree of protection (IP)
The IP degree of protection indicates the level of protection of a device against contacts with
live parts and penetration of foreign bodies of the liquid and solid type.