3-phase TEFV induction motors ATEX GAS - Zones 1 & 2

3-phase TEFV induction motors
ATEX GAS - Zones 1 & 2
Construction
Component Materials Remarks
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C1 - Description of FLSD flameproof motors: Ex d II B
Finned housing Cast iron - with integral feet or without feet
• 4, 6 or 8 fixing holes for foot mounting
• lifting rings for frame size ≥ 90
- external earth terminal
Stator Insulated low-carbon magnetic steel
laminations
Insulated electroplated copper
Rotor Insulated low-carbon magnetic steel
laminations
Aluminium (A5L) or copper
Shaft Steel - for frame size ≤ 132:
• tapped shaft end
• closed keyway
- for frame size ≥ 160:
• tapped shaft end
• open keyway
End shields Cast iron
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7
10
5 1
- low carbon content guarantees long-term lamination pack stability
- semi-enclosed slots
- class F insulation
- squirrel cage with inclined cage bars
- rotor cage pressure die-cast in aluminium (or alloy for special applications) or soldered
in copper
- shrink-fitted to shaft or keyed
- rotor balanced dynamically, class A - 1/2 key
Bearings and lubrication - bearings preloaded at NDE from 80 to 315 ST and preloaded at DE from 315 M
upwards
Labyrinth seal
Lipseals
Plastic or steel
Synthetic rubber
Fan Composite material up to frame size
225 inclusive, metal for larger models
- lipseal or labyrinth seal at drive end and seal at non drive end for frame sizes up to 225
inclusive and 280
- decompression grooves for frame sizes 250 - 315 and 355
- 2 directions of rotation: straight blades
Fan cover Pressed steel - fitted with a drip cover for operation in vertical position outdoors, shaft end facing down
Terminal box Cast iron
Steel for frame size 280
- type "d" in standard version and type "e" as an option (section C2.1)
- fitted with a flameproof cable gland
(cable Ø must be specified at time of ordering)
- can be turned: 4 positions
- internal earth terminal
- terminal plate
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9
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