DESICCANTS: WHERE ARE THE CONCERNS?
December 1st 2008: Very big concerns for end users of electrical transformers will happen with REACH
=> 1. You need it;
=> 2. You will use it on a reservoir that contains oil or chemical substances;
=> 3. You will "poluted it" with oil mists comming from the lubricant reservoir where you use it.
=> 4. Your employees will have to manipulate and will be expose to "poluted" desiccant.
With the new European regulation REACH, end-users have the obligation to analyze to which kind of chemical substances or preparations employees may be exposed. To help them in this research we established the questionaire here after:
Question: Why does industry use breathers and desiccant breathers on electrical transformers?
Answer: Because electrical transformers breathe.
Question: Why do electrical transformers breathe?
Answer: Because oil and air volumes inside electrical transformers expand and contract.
Question: Why does this expansion and contraction occur?
Answer: Because the oil and air are subject to temperature variation.
Question: What happens as oil is subjected to heat?
Answer: Oil will generate oil fumes and oil mists.
Question: What happens to this fume and mist?
Answer: It occupies the air above oil.
Question: We answered that electrical transformers breathe, what does this mean?
Answer: It means the electrical transformers inhales and exhales. So in fact all intelligent people will recognize that electrical transformer exhales air that contains a certain amount of oil fumes or oil mists.
Question: Are oil fumes or oil mists, wet or dry?
Question: What is a desiccant breather designed for?[/i]
Answer: It is designed to stop humidity but will adsorb oil mist as well.
First conclusion: desiccant uses in desiccant breathers, on electrical transformers, when it will be saturated, will contains about 30% of oil residues (fumes and mists). Those residues are presents at about 60 times more than the blue chemical additive used to coloured the desiccant. It means that, on a health and safety point of view and in regard with REACH, the concern is not the colour additive of the desiccant but the kind of dielectric oil used by electrical transformers. And if the colour additive is not the health and safety concern, why not using the best colour additive: the Blue one?
What contains dielectric oil: most of its may contains up to 90% of light or heavy Naphtenic or Paraffinic distillate and others additives. Many of those products contain substances that are classified by the WHO as may cause cancer to human.
» More informations on this subject
End users may have big big trouble, after December 1st, 2008, if they want to continue to use refilled desiccant breathers with the desiccant and the dielectric oil that they use today.
If end-users want to continue to use the dielectric lubricant that they use and if they want to be in accordance with regulations and safety procedures, they have to use a desiccant breather that is in conformity with REACH; that is the case of the DESCASE breathers using the best efficient blue colour additive.
» => DESCASE Breathers conformity to REACH
At this time, all people cocnerned by this subject, doctors and engineers, involved in health and safety:
=> Because they recognized that the real hazard concern, in a desiccant, is the 30% of oil residues that employees will have to manipulate and inhale when they will have to replace used and saturated desiccants, and not is not the 0,5% of colour additive
=> They recommend the use of desiccants in close cartridge, like the DESCASE;
=> They recommend to use the more efficient colour indicator (that is in fact the blue one).
=> Silicagel comparisons
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