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7
Disposal
POLIM®-C surge arresters are environmentally-friendly products which must be disposed of based
on the respective applicable regional regulations in an environmentally-friendly manner. The materials
should be given up for recycling.
Constituent components are:
ƒ silicone rubber (not halogenated) for the external insulation
ƒ terminals and other parts made of aluminium
ƒ metal-oxide varistors
ƒ fibreglass-reinforced plastic straps
ƒ mounting hardware and spring washers from steel
Silicone rubber (not halogenated)
The silicone rubber can break down into SiO
varistors.
Metal-oxide varistors
The metal-oxide varistors are sintered ceramics consisting of about 90% of ZnO. The following addi-
tions are also contained within:
ƒ percent by weight between 1 and 4%: Bi
substances according to EU ordinances
ƒ percent by weight between 0.1 and 1%: NiO and Cr
gerous materials pursuant to EU guideline 91/689/EEC
Metal-oxide varistors are coated with a thin glass coating containing lead-oxide (<0.1% of the weight
of the metal-oxide varistor).
The substances are ligated as a mixed oxide in metal-oxide varistors. A wash-out test in accordance
with an EPA specification (Federal Register/vol. 45, No 98 /Rules and regulations) has shown that
the sintered metal-oxide varistors can be disposed of as industrial waste without infringing on EEC
guidelines.
No danger to personal health or the environment is present during normal operation.
1HC0076149 AC | EN | Operating instructions
and CO
, thus uncovering the encased metal-oxide
2
2
O
and Sb
O
, which are considered to be dangerous
2
3
2
3
O
, which are considered poisonous and dan-
2
3
|
11
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