subject: Icing And Snow Melting System [print this page] Anti-icing system (SA) are intended for use in temperatures from -10 C to +5 C - during a thaw, as well as in spring and autumn to prevent freezing of melt water. They are needed when the formation of icicles and frost - at -15 E below (low humidity), they are not involved, says Vaclav Koperin fresh issue of Ideas for your home. In other words, these systems are used to prevent freezing levels, entrances to the garage or home. With akntiobledeneniya systems also protect the roof from mechanical stress due to the accumulation of ice, in particular, the siding is the price of which is very high.
The system for de-icing consists of the following components: a distributed over a large area of the heating cable, this cable management subsystem, equipped with protective equipment to ensure safe operation, the power subsystem.
Required equipment de-icing system circuit breakers (or, in other terms, the differential circuit breakers) ensures reliable protection against electrical leakage in the cable insulation damage. These devices localize the fault, make it easy to search and recovery of a failed plot. In addition, to prevent the CA from the short or long-term congestion is used thermomagnetic circuit breakers (single-pole or three pole).
Precinct cables
The design and type of CA depends on the task at hand. The system is based distributed heater or heating network, which may include various types of heating cables - resistive, self-regulating, zoning, reinforced and armored, and various fasteners.
Resistive cable. The basic building block for resistive cable - metal heating wire ("lived" there could be two in one cable) with a high resistance. He and generates heat when connected voltage. Mine covers heat-resistant insulation (polypropylene copolymer, mica, silicone rubber, fluorocarbon polymers), screen (additional protective film of copper or stainless steel) and the protective shell of corrosion-resistant polymeric materials (such as a compound).
Resistance cables are produced in the form of ready-to-use product sections. In these fixed-length segment of the cable is connected to a special coupling of the so-called "cold" end - supply cable is connected to the mains. The length of the "cold" end of 0.75 to 3 m
For the best exposure and heating supply cables, connect them with special sleeves that are placed in a special cement-drenched sleeve. This ensures reliability and tightness. The cable is heated to 65 C, so it melts the snow and ice quickly. In case of insufficient capacity for effective heating of the cable laying is carried out in several parallel layers.
The main advantage of resistive cable - low price (20-35 USD per 1m), but the main drawback - high power consumption (due to the fact that the cable is heated uniformly at all sites and, therefore, in areas not covered by ice and snow, electricity wasted). Resistive cables produce Ceilhit (Spain), Devi (Denmark), Ensto (Finland), Nexans (Norway), Nelson, Raychem (both - USA), "Teplolux", "FTA" (both - Russia), "Eleter" (trade mark "Exxon") (Ukraine) and others
