3-phase TEFV induction motors ATEX GAS - Zones 1 & 2
3-phase TEFV induction motors ATEX GAS - Zones 1 & 2
3-phase TEFV induction motors ATEX GAS - Zones 1 & 2
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20<br />
3-<strong>phase</strong> <strong>TEFV</strong> <strong>induction</strong> <strong>motors</strong><br />
<strong>ATEX</strong> <strong>GAS</strong> - <strong>Zones</strong> 1 & 2<br />
Environment<br />
LEROY-SOMER <strong>motors</strong> are protected with a range of surface finishes.<br />
The surfaces receive appropriate special treatments, as shown below.<br />
B3 - External finish<br />
The polyvinyl butyral undercoat acts as a primer and base coat from frame size 160 mm.<br />
Surface Surface treatment<br />
Cast iron<br />
Steel<br />
SA 2.5 shot blasting<br />
Application of a primer (25 to 30 μm) or a coat of polyvinyl 20 μm or epoxy ester<br />
Phosphatization + Primer<br />
Electrostatic painting or epoxy powder<br />
Aluminium alloy Shot blasting<br />
Definition of atmospheres<br />
An atmosphere is said to be harsh when components are attacked by bases, acids or salts. It is said to be corrosive when components are<br />
attacked by oxygen.<br />
Paint systems<br />
Products Environment System Applications<br />
Increased safety<br />
- Non-sparking<br />
Aluminium frame:<br />
LSE - LSN<br />
Increased safety<br />
- Non-sparking<br />
- Flameproof<br />
Aluminium frame:<br />
LSE - LSN<br />
Cast iron frame:<br />
FLSE - FLSN - FLSD<br />
Non-harsh and not very harsh<br />
(indoors, rural or industrial)<br />
Substantial chemical attack: frequent contact<br />
with bases, acids, alkalis<br />
neutral environment (not in contact with<br />
chlorinated or sulphurous products)<br />
Moderately corrosive: damp and outdoors<br />
(temperate climate)<br />
Corrosive: coastal, very humid<br />
(tropical climate)<br />
Special conditions<br />
Very harsh, polluted with<br />
chlorinated or sulphurous products<br />
System Ia as standard for <strong>motors</strong> with aluminium frame: LSN - LSE<br />
System IIa as standard for <strong>motors</strong> with cast iron frame: FLSN - FLSE - FLSD<br />
Corrosivity<br />
category acc. to<br />
ISO 12944-2<br />
Ia 1 polyurethane top coat, 20/30 μm C3L<br />
IIIb<br />
IIa<br />
IIIa<br />
IVb<br />
161a/b<br />
Some application conditions require special finishes for the environment:<br />
- extremely harsh environments (chemical industries, refineries, etc):<br />
paint system IIIa, steel screws with anti-corrosion coating, stainless steel cover (optional).<br />
The standard paint colour for the <strong>ATEX</strong> Gas range is: RAL 2004<br />
1 Epoxy base coat, 30/40 μm<br />
1 Epoxy intermediate coat, 30/40 μm<br />
1 Epoxy top coat, 25/35 μm<br />
1 Epoxy base coat, 30/40 μm<br />
1 polyurethane top coat, 20/30 μm<br />
1 Epoxy base coat, 30/40 μm<br />
1 Epoxy intermediate coat, 30/40 μm<br />
1 polyurethane top coat, 20/30 μm<br />
1 base coat, 20/30 μm<br />
2 Epoxy intermediate coats, each 35/40 μm<br />
1 Epoxy top coat, 35/40 μm<br />
1 base coat, 50 μm<br />
2 Epoxy intermediate coats, each 80 μm<br />
1 Epoxy top coat, 50 μm<br />
C4H<br />
C3M<br />
C4M<br />
C5I<br />
C5M
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