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LOW SMOKE ZERO HALOGEN (LSZH)
What does it mean?

 
LSZH
LSZH simply translates to Low Smoke Zero Halogen and refers to the behaviour of chemical compounds when combusted-specifically the quantity of smoke generated and the toxicity of the emissions.
Halogens- What are they??
Halogens are a guoup of five elements comprising; Fluorine, Chlorine, Bromine. Iodine and Astatine.
 
 
Halogens- and the effect of combustion
In their BAsic form, Halogens are very toxic, strong oxidizers and very chemically reactive. In the ever of combustion, LSZH and non LSZH cables behave in very different ways, as indicated below.
 
 
 
What is the difference between LSZH and non LSZH cables?

LSZH cables have a zero halogen content, emit no toxic fumes, generate very little smoke and produce no corrosive or caustic acids. LSZH cable are therefore ideally suited for all marine applicetions where personnel safety and protection of valuable equipment are of paramount importance.

They also generate large volumes of dense black smoke that blocks visibility and severely disrupts evacuation procedures. The smoke and fumes can also lead to suffocation from smoke inhalation. A one metre length of burning cable that contains 0.85Kg of PVC will completely obscure a room of 100m3 with black toxic smoke in less than five minutes.


When Combusted. Halogens combine with moisture to form Hydrochloric Acid. This extremely corrosive acid is potentially deadly to humans and always causes extensive property damage. Acid of this nature aggressively attack electrical switchboards, motors, fixtures, furnishings, floor coverings, paint surfaces etc. In many cases the effects of acid corrosion after a fire are much more severe than the actual fire damage itself.
 
 

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Yu Tai Electric Co / Wei Shen Hardware Co., Ltd. All rights reserved.