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LC1F4004 Datasheet(PDF) 10 Page - List of Unclassifed Manufacturers |
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LC1F4004 Datasheet(HTML) 10 Page - List of Unclassifed Manufacturers |
10 / 252 page TeSys™ IEC-Style Contactors and Starters Selection Guide Technical Information: Protective Treatment / Climatic Environment © 2001-2004 Schneider Electric All Rights Reserved 10 01/04 Technical Information: Protective Treatment According to Climatic Environment Depending on the climatic and environmental conditions in which the equipment is placed, Telemecanique can offer specially adapted products to meet your requirements. In order to make the correct choice of protective finish, two points should be remembered: • The prevailing climate of the country is never the only criterion. • Only the atmosphere in the immediate vicinity of the equipment should be considered. “TC” Treatment for All Climates “TC” is the standard treatment for Telemecanique equipment and is suitable for the vast majority of applications. It is the equivalent of treatments described as “Klimafest,” “Climateproof,” “Total Tropicalization,” or “Super Tropicalization,” and meets the following requirements: • Publication UTE C 63-100 (method l), successive cycles of humid heat at + 40 °C (104 °F) and 95% relative humidity. • DIN 50016 — Variations of ambient conditions within a climatic chamber: + 23 °C (73 °F) and 83% relative humidity, + 40 °C (104 °F) and 92% relative humidity. It also meets the requirements of the marine classification authority BV-LROS-GL-DNV-RINA. Characteristics • Steel components are usually treated with zinc chromate and, when they have a mechanical function, they may also be painted. • Insulating materials are selected for their high electrical, dielectric and mechanical characteristics. • Metal enclosures have a stoved paint finish, applied over a primary phosphate protective coat, or are galvanized (for example, some prefabricated busbar trunking components). Limits for Use of “TC” (All Climates) Treatment • “TC” treatment is suitable for the following temperatures and humidity: • It may also be used where the above limits are only exceeded accidentally or for very short periods, or where temperature variations are not sufficient or fast enough to cause heavy condensation or dripping water on the equipment. “TC” treatment is therefore suitable for all latitudes, including tropical and equatorial regions, where the equipment is mounted in normal, ventilated industrial locations. Being sheltered from external climatic conditions, temperature variations are small, the risk of condensation is minimized, and the risk of dripping water is virtually non-existent. Extension of Use of “TC” (All Climates) Treatment In cases where the humidity around the equipment exceeds the conditions described above, where the equipment (in tropical regions) is mounted outdoors, or where it is placed in a very humid location (laundries, sugar refineries, steam rooms, and so forth), “TC” treatment can still be used if the following precautions are taken: • The enclosure in which the equipment is mounted must be protected with a “TH” finish (see page 11) and must be well ventilated to avoid condensation and dripping water (for example, enclosure base plate mounted on spacers). • Components mounted inside the enclosure must have a “TC” finish. • If the equipment is to be switched off for long periods, a heater must be provided (0.2 to 0.5 kW per square decimeter / 15.5 square inch of enclosure), switched on automatically when the equipment is turned off. This heater keeps the inside of the enclosure at a temperature slightly higher than the outside surrounding temperature, thereby avoiding any risk of condensation and dripping water (the heat produced by the equipment itself in normal running is sufficient to provide this temperature difference). Temperature 20 °C (68 °F) 40 °C (104 °F) 50 °C (122 °F) Relative Humidity 95% 80% 50% |
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