HEATING ELEMENTS FOR COOKING
Sheathed heating elements for cavity cooking are subject to high temperatures (500 °C - 900°C) as well as to rapid and frequent thermal transient states (on - off), which seriously put their integrity and long life to the test. In such extreme conditions, the materials have to be selected and machined with advanced know-how and state-of-the-art technologies. These in turn allow the translation of the functional specifications imposed by each application into a reliable, safe and durable product.Main features of the classical structure of a tubular element are:
- coiled heating wire (Ni/Cr/Fe/Al)
- granular dielectric (MgO)
- metal sheath (AISI, Incoloy)
- connecting terminal pin
- sealing
- insulating bush
In particular, the sealing has the function of preserving as much as possible the electric insulation properties between the coiled heating wire and the sheath. These properties are guaranteed by the high purity and correct drying of the magnesium oxide layer. This aspect plays a fundamental role in guaranteeing safe and satisfactory use of the product.Any damage or degradation of the sealing caused the dielectric layer to progressively absorb humidity form the atmosphere, thus causing an increase in its electrical conductivity, the ensuing earthing of the phase being powered and the immediate shutting off of power supply because of the intervention of a safety switch. The technology at Zoppas Industries' disposal allows us to offer different sealing options for sheathed elements (silicon, epoxy, teflon) which are all equivalent as for their compliance with existing safety standards, but offer different guarantees with respect to phase.-earth electrical insulation.
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Electric Oven
Heating Elements for Electric Oven
