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

H2.6 - FORCED VENTILATION
The ATEX motors described in this catalogue
are approved to be supplied with frequency
inverters.
This type of application sometimes requires
the mounting of a forced ventilation unit for
use at low speed (temperature rise) or at
high speed (noise), in addition to the thermal
protection (winding and DE shield).
The mounting of an axial forced ventilation
unit is recommended for motors ≥ frame
size 160.
Safety conditions: The forced ventilation
unit is controlled by the power supply and
should have the same degree of flameproof
protection as the FLSD motor.
To adapt the motor to the application, it is
necessary to inform the manufacturer of the
operating characteristics (speed range,
voltage, frequency, etc).
H2.7 - ENCODERS
All our "d", "e" and "n" safety motors can be
fitted with an ATEX-certified incremental
encoder with a protection level II 2GD
Ex d IIC.
This pulse generator supplies a number of
pulses proportional to the motor speed. It can
be supplied with a D.C. voltage of 5 V +/- 10%
or 11-30 V regulated.
H2.8 - ROLLER BEARINGS
For high radial forces, it is possible to adapt
roller bearings to the motor DE shield from
frame size 160 upwards.
H2.9 - FLYING LEADS
Motors can be fitted with flying leads
consisting of multicore cables or single-core
cables for high currents.
The earthing is included in the sheathed
cable output.
Accessories (thermal protection, space
heaters, etc) are usually connected using
another multicore cable.
3-phase TEFV induction motors
ATEX GAS - Zones 1 & 2
Optional features
H2 - Mechanical options
The drive encoder lines per revolution should
be specified (at the time of ordering): 1024 or
4096 (for the incremental encoder) and 8192
(for the absolute encoder).
Please consult Leroy-Somer.
Caution: Motors with flying leads must be
connected in an area with a protection type
compatible with the installation zone.
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