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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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 />
Construction<br />
C3 - Description of (F)LSE increased safety <strong>motors</strong>: Ex "e"<br />
and (F)LSN non-sparking <strong>motors</strong>: Ex "nA"<br />
Component Materials Remarks<br />
1<br />
2<br />
3<br />
4<br />
5<br />
6<br />
7<br />
8<br />
9<br />
10<br />
Finned housing Aluminium alloy or cast iron<br />
LSE/LSN FLSE/FLSN<br />
Stator Insulated low-carbon magnetic steel<br />
laminations<br />
Insulated electroplated copper<br />
Rotor Insulated low-carbon magnetic steel<br />
laminations<br />
Aluminium<br />
4<br />
7<br />
5<br />
10<br />
3<br />
- with integral or screw-on feet, or without feet<br />
• 4 or 6 fixing holes for housings with feet<br />
• lifting rings for frame size ≥ 132 M (LSE/LSN) or ≥ 90 (FLSE/FLSN)<br />
- earth terminal<br />
- low carbon content guarantees long-term lamination pack stability<br />
- welded laminations<br />
- semi-enclosed slots<br />
- class F insulation<br />
- inclined cage bars<br />
- rotor cage pressure die-cast in aluminium (or alloy for special applications)<br />
- shrink-fitted or keyed to shaft<br />
- rotor balanced dynamically, class A - 1/2 key<br />
Shaft Steel - for frame size ≤ 132:<br />
• shaft end fitted with screw and washer<br />
• closed keyway<br />
- for frame size ≥ 160:<br />
• tapped hole<br />
• open keyway<br />
End shields<br />
Aluminium alloy - LSN-LSE series non drive end frame sizes 80 - 90<br />
Cast iron - LSN-LSE series frame sizes 80 - 90 drive end (optional for 80 and 90 at non drive end)<br />
- LSN-LSE series frame size ≥ 100<br />
- FLSN-FLSE series all frame sizes<br />
Bearings - bearings preloaded at NDE from 80 to 315 and at DE for FLSN ≥ 315 M<br />
Labyrinth seal<br />
Lipseals<br />
Plastic or steel<br />
Synthetic rubber<br />
Fan Composite material<br />
or metal<br />
- sealed with gaskets<br />
- labyrinth seals, deflector or decompression grooves<br />
- 2 directions of rotation: straight blades<br />
Fan cover Pressed steel - fitted, on request, with a drip cover for operation in vertical position, shaft end facing<br />
down<br />
Terminal box Aluminium alloy<br />
or cast iron<br />
- IP 55 or IP 65 for "GD" applications<br />
- can be turned, opposite the feet<br />
- equipped with a block with 6 certified Ex e safety terminals for frame size ≤ 132 and<br />
isolators thereafter<br />
- terminal box supplied fitted with certified Ex e safety cable anchor glands<br />
- 1 earth terminal in each terminal box (2 from (F)LSN 160 upwards)<br />
2<br />
1<br />
6<br />
9<br />
8<br />
23
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